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Field Listing :: Major infectious diseases
This entry lists major infectious diseases likely to be encountered in countries where the risk of such diseases is assessed to be very high as compared to the United States. These infectious diseases represent risks to US government personnel traveling to the specified country for a period of less than three years. The degree of risk is assessed by considering the foreign nature of these infectious diseases, their severity, and the probability of being affected by the diseases present. The diseases listed do not necessarily represent the total disease burden experienced by the local population.
The risk to an individual traveler varies considerably by the specific location, visit duration, type of activities, type of accommodations, time of year, and other factors. Consultation with a travel medicine physician is needed to evaluate individual risk and recommend appropriate preventive measures such as vaccines.
Diseases are organized into the following six exposure categories shown in italics and listed in typical descending order of risk. Note: The sequence of exposure categories listed in individual country entries may vary according to local conditions.
food or waterborne diseases acquired through eating or drinking on the local economy:
Hepatitis A - viral disease that interferes with the functioning of the liver; spread through consumption of food or water contaminated with fecal matter, principally in areas of poor sanitation; victims exhibit fever, jaundice, and diarrhea; 15% of victims will experience prolonged symptoms over 6-9 months; vaccine available.
Hepatitis E - water-borne viral disease that interferes with the functioning of the liver; most commonly spread through fecal contamination of drinking water; victims exhibit jaundice, fatigue, abdominal pain, and dark colored urine.
Typhoid fever - bacterial disease spread through contact with food or water contaminated by fecal matter or sewage; victims exhibit sustained high fevers; left untreated, mortality rates can reach 20%.
vectorborne diseases acquired through the bite of an infected arthropod:
Malaria - caused by single-cell parasitic protozoa Plasmodium; transmitted to humans via the bite of the female Anopheles mosquito; parasites multiply in the liver attacking red blood cells resulting in cycles of fever, chills, and sweats accompanied by anemia; death due to damage to vital organs and interruption of blood supply to the brain; endemic in 100, mostly tropical, countries with 90% of cases and the majority of 0.4-0.8 million estimated annual deaths occurring in sub-Saharan Africa.
Dengue fever - mosquito-borne (Aedes aegypti) viral disease associated with urban environments; manifests as sudden onset of fever and severe headache; occasionally produces shock and hemorrhage leading to death in 5% of cases.
Yellow fever - mosquito-borne (in urban areas Aedes aegypti) viral disease; severity ranges from influenza-like symptoms to severe hepatitis and hemorrhagic fever; occurs only in tropical South America and sub-Saharan Africa, where most cases are reported; fatality rate is less than 20%.
Japanese Encephalitis - mosquito-borne (Culex tritaeniorhynchus) viral disease associated with rural areas in Asia; acute encephalitis can progress to paralysis, coma, and death; fatality rates 30%.
African Trypanosomiasis - caused by the parasitic protozoa Trypanosoma; transmitted to humans via the bite of bloodsucking Tsetse flies; infection leads to malaise and irregular fevers and, in advanced cases when the parasites invade the central nervous system, coma and death; endemic in 36 countries of sub-Saharan Africa; cattle and wild animals act as reservoir hosts for the parasites.
Cutaneous Leishmaniasis - caused by the parasitic protozoa leishmania; transmitted to humans via the bite of sandflies; results in skin lesions that may become chronic; endemic in 88 countries; 90% of cases occur in Iran, Afghanistan, Syria, Saudi Arabia, Brazil, and Peru; wild and domesticated animals as well as humans can act as reservoirs of infection.
Plague - bacterial disease transmitted by fleas normally associated with rats; person-to-person airborne transmission also possible; recent plague epidemics occurred in areas of Asia, Africa, and South America associated with rural areas or small towns and villages; manifests as fever, headache, and painfully swollen lymph nodes; disease progresses rapidly and without antibiotic treatment leads to pneumonic form with a death rate in excess of 50%.
Crimean-Congo hemorrhagic fever - tick-borne viral disease; infection may also result from exposure to infected animal blood or tissue; geographic distribution includes Africa, Asia, the Middle East, and Eastern Europe; sudden onset of fever, headache, and muscle aches followed by hemorrhaging in the bowels, urine, nose, and gums; mortality rate is approximately 30%.
Rift Valley fever - viral disease affecting domesticated animals and humans; transmission is by mosquito and other biting insects; infection may also occur through handling of infected meat or contact with blood; geographic distribution includes eastern and southern Africa where cattle and sheep are raised; symptoms are generally mild with fever and some liver abnormalities, but the disease may progress to hemorrhagic fever, encephalitis, or ocular disease; fatality rates are low at about 1% of cases.
Chikungunya - mosquito-borne (Aedes aegypti) viral disease associated with urban environments, similar to Dengue Fever; characterized by sudden onset of fever, rash, and severe joint pain usually lasting 3-7 days, some cases result in persistent arthritis.
water contact diseases acquired through swimming or wading in freshwater lakes, streams, and rivers:
Leptospirosis - bacterial disease that affects animals and humans; infection occurs through contact with water, food, or soil contaminated by animal urine; symptoms include high fever, severe headache, vomiting, jaundice, and diarrhea; untreated, the disease can result in kidney damage, liver failure, meningitis, or respiratory distress; fatality rates are low but left untreated recovery can take months.
Schistosomiasis - caused by parasitic trematode flatworm Schistosoma; fresh water snails act as intermediate host and release larval form of parasite that penetrates the skin of people exposed to contaminated water; worms mature and reproduce in the blood vessels, liver, kidneys, and intestines releasing eggs, which become trapped in tissues triggering an immune response; may manifest as either urinary or intestinal disease resulting in decreased work or learning capacity; mortality, while generally low, may occur in advanced cases usually due to bladder cancer; endemic in 74 developing countries with 80% of infected people living in sub-Saharan Africa; humans act as the reservoir for this parasite.
aerosolized dust or soil contact disease acquired through inhalation of aerosols contaminated with rodent urine:
Lassa fever - viral disease carried by rats of the genus Mastomys; endemic in portions of West Africa; infection occurs through direct contact with or consumption of food contaminated by rodent urine or fecal matter containing virus particles; fatality rate can reach 50% in epidemic outbreaks.
respiratory disease acquired through close contact with an infectious person:
Meningococcal meningitis - bacterial disease causing an inflammation of the lining of the brain and spinal cord; one of the most important bacterial pathogens is Neisseria meningitidis because of its potential to cause epidemics; symptoms include stiff neck, high fever, headaches, and vomiting; bacteria are transmitted from person to person by respiratory droplets and facilitated by close and prolonged contact resulting from crowded living conditions, often with a seasonal distribution; death occurs in 5-15% of cases, typically within 24-48 hours of onset of symptoms; highest burden of meningococcal disease occurs in the hyperendemic region of sub-Saharan Africa known as the "Meningitis Belt" which stretches from Senegal east to Ethiopia.
animal contact disease acquired through direct contact with local animals:
Rabies - viral disease of mammals usually transmitted through the bite of an infected animal, most commonly dogs; virus affects the central nervous system causing brain alteration and death; symptoms initially are non-specific fever and headache progressing to neurological symptoms; death occurs within days of the onset of symptoms.

By Country Listing of the values for the Major infectious diseases field
Country | Major infectious diseases
--- | ---
Afghanistan | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria (2016)
American Samoa | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Angola | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, typhoid fever (2016) vectorborne diseases: dengue fever, malaria (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Anguilla | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Antigua and Barbuda | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Argentina | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Aruba | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Bangladesh | degree of risk: high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria are high risks in some locations (2016) water contact diseases: leptospirosis (2016) animal contact diseases: rabies (2016)
Barbados | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Belize | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Benin | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever, malaria, and yellow fever (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Bhutan | degree of risk: high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever (2016)
Bolivia | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea and hepatitis A (2016) vectorborne diseases: dengue fever, malaria, and yellow fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Botswana | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria (2016)
Brazil | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea and hepatitis A (2016) vectorborne diseases: dengue fever and malaria (2016) water contact diseases: schistosomiasis (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Burkina Faso | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever, malaria, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Burma | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever, malaria, and Japanese encephalitis (2016) water contact diseases: leptospirosis (2016) animal contact diseases: rabies (2016)
Burundi | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Cabo Verde | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Cambodia | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever, Japanese encephalitis, and malaria (2016)
Cameroon | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Cayman Islands | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Central African Republic | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Chad | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
China | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: Japanese encephalitis (2016) soil contact diseases: hantaviral hemorrhagic fever with renal syndrome (HFRS) (2016)
Colombia | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: dengue fever, malaria, and yellow fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Congo, Democratic Republic of the | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and trypanosomiasis-gambiense (African sleeping sickness) (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Congo, Republic of the | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Costa Rica | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: dengue fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Cote d'Ivoire | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Croatia | degree of risk: intermediate (2016) vectorborne diseases: tickborne encephalitis (2016)
Cuba | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea and hepatitis A (2016) vectorborne diseases: dengue fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Curacao | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Djibouti | degree of risk: high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever (2016)
Dominica | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Dominican Republic | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Ecuador | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Egypt | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) water contact diseases: schistosomiasis (2016)
El Salvador | degree of risk: high (2016) food or waterborne diseases: bacterial and protozoal diarrhea (2016) vectorborne diseases: dengue fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Equatorial Guinea | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) animal contact diseases: rabies (2016)
Eritrea | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016)
Estonia | degree of risk: intermediate (2016) vectorborne diseases: tickborne encephalitis (2016)
Eswatini | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria (2016) water contact diseases: schistosomiasis (2016)
Ethiopia | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Fiji | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Gabon | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Gambia, The | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Ghana | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Grenada | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Guatemala | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Guinea | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) aerosolized dust or soil contact diseases: Lassa fever (2016)
Guinea-Bissau | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Guyana | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Haiti | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Honduras | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Hungary | degree of risk: intermediate (2016) vectorborne diseases: tickborne encephalitis (2016)
India | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: dengue fever, Japanese encephalitis, and malaria (2016) water contact diseases: leptospirosis (2016) animal contact diseases: rabies (2016)
Indonesia | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016)
Iran | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: Crimean-Congo hemorrhagic fever (2016)
Iraq | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016)
Jamaica | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Kenya | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and Rift Valley fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Laos | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016)
Latvia | degree of risk: intermediate (2016) vectorborne diseases: tickborne encephalitis (2016)
Liberia | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) aerosolized dust or soil contact diseases: Lassa fever (2016)
Lithuania | degree of risk: intermediate (2016) vectorborne diseases: tickborne encephalitis (2016)
Madagascar | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Malawi | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Malaysia | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: dengue fever (2016) water contact diseases: leptospirosis (2016)
Mali | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Marshall Islands | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Mauritania | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Mexico | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea and hepatitis A (2016) vectorborne diseases: dengue fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Micronesia, Federated States of | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Montenegro | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: Crimean-Congo hemorrhagic fever (2016)
Mozambique | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Namibia | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria (2016) water contact diseases: schistosomiasis (2016)
Nepal | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: Japanese encephalitis, malaria, and dengue fever (2016)
New Caledonia | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Nicaragua | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Niger | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Nigeria | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: leptospirosis and schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016) aerosolized dust or soil contact diseases: Lassa fever (2016)
Pakistan | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) animal contact diseases: rabies (2016)
Panama | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: dengue fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Papua New Guinea | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Paraguay | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Peru | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever, malaria, and Bartonellosis (Oroya fever) (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Philippines | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) water contact diseases: leptospirosis (2016)
Poland | degree of risk: intermediate (2016) vectorborne diseases: tickborne encephalitis (2016)
Puerto Rico | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Russia | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: tickborne encephalitis (2016)
Rwanda | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) animal contact diseases: rabies (2016)
Saint Barthelemy | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Saint Lucia | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Saint Martin | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Saint Vincent and the Grenadines | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Samoa | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Sao Tome and Principe | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016)
Senegal | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Serbia | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea (2016)
Sierra Leone | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) aerosolized dust or soil contact diseases: Lassa fever (2016)
Singapore | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Sint Maarten | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Somalia | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: dengue fever, malaria, and Rift Valley fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
South Africa | degree of risk: intermediate (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) water contact diseases: schistosomiasis (2016)
South Sudan | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, trypanosomiasis-Gambiense (African sleeping sickness) (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Sri Lanka | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea and hepatitis A (2016) vectorborne diseases: dengue fever (2016) water contact diseases: leptospirosis (2016) animal contact diseases: rabies (2016)
Sudan | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and Rift Valley fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Suriname | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Tajikistan | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria (2016)
Tanzania | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and Rift Valley fever (2016) water contact diseases: schistosomiasis and leptospirosis (2016) animal contact diseases: rabies (2016)
Thailand | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea (2016) vectorborne diseases: dengue fever, Japanese encephalitis, and malaria (2016)
Timor-Leste | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016)
Togo | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and yellow fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016) respiratory diseases: meningococcal meningitis (2016)
Tonga | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Trinidad and Tobago | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Turks and Caicos Islands | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Uganda | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A and E, and typhoid fever (2016) vectorborne diseases: malaria, dengue fever, and trypanosomiasis-Gambiense (African sleeping sickness) (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Venezuela | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea and hepatitis A (2016) vectorborne diseases: dengue fever and malaria (2016) note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Vietnam | degree of risk: very high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever, malaria, and Japanese encephalitis (2016)
Virgin Islands | note: active local transmission of Zika virus by Aedes species mosquitoes has been identified in this country (as of August 2016); it poses an important risk (a large number of cases possible) among US citizens if bitten by an infective mosquito; other less common ways to get Zika are through sex, via blood transfusion, or during pregnancy, in which the pregnant woman passes Zika virus to her fetus
Yemen | degree of risk: high (2016) food or waterborne diseases: bacterial diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: dengue fever and malaria (2016) water contact diseases: schistosomiasis (2016)
Zambia | degree of risk: very high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)
Zimbabwe | degree of risk: high (2016) food or waterborne diseases: bacterial and protozoal diarrhea, hepatitis A, and typhoid fever (2016) vectorborne diseases: malaria and dengue fever (2016) water contact diseases: schistosomiasis (2016) animal contact diseases: rabies (2016)

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