Hepatitis B is more common and much more easily spread than the AIDS virus and may lead to cirrhosis and liver cancer. Hepatitis C may lead to cirrhosis and liver cancer. Only people who have hepatitis B can get hepatitis D. hepatitis E - virus spread mostly through unclean water. This type of hepatitis is common in developing countries and has not occurred in the United States. These mosquitoes are present in the tropics and subtropics in almost all countries.
Malaria is the most deadly of all tropical parasitic diseases.
Mantoux test - A skin test used to identify most people with M. tuberculosis within six to eight weeks after initial exposure. Spread by airborne droplets from the upper respiratory tract, the disease usually takes two to three weeks to appear. Pertussis caused thousands of deaths in the 1930s and 1940s, but with the advent of a vaccine, the rate of death has declined dramatically. Spread though feces and airborne particles, the poliovirus usually causes no more than a mild illness. However, some of the more serious manifestations of the disease include meningitis, which can lead to extensive paralysis.