a disease caused by the human immunodeficiency virus (HIV), which kills or impairs cells of the immune system and progressively destroys the body's ability to fight infections and certain cancers. HIV is most commonly spread by sexual contact with an infected partner. The term AIDS applies to the most advanced stages of an HIV infection.

also called African sleeping sickness - a systemic disease caused by parasite of the Trypanosoma brucei family and transmitted by the bite of the tsetse fly. There is West African trypanosomiasis and East African trypanosomiasis, referring to the areas in Africa where they are found. also called African sleeping sickness - a systemic disease c [..]

a special protein produced by the body's immune system that recognizes and helps fight infectious agents and other foreign substances that invade the body. a special protein produced by the body's immune system that recognizes and helps fight infectious agents and other foreign substances that invade the body.

to be without noticeable symptoms of disease. to be without noticeable symptoms of disease.

an acute, infectious disease caused by the consumption of water or food contaminated with the bacterium Vibrio cholerae. an acute, infectious disease caused by the consumption of water or food contaminated with the bacterium Vibrio cholerae.

test to look into the rectum and colon through a long, flexible, narrow tube (called a colonoscope) with a light and tiny lens on the end. test to look into the rectum and colon through a long, flexible, narrow tube (called a colonoscope) with a light and tiny lens on the end.

a diarrheal infection caused by the parasite Cryptosporidium. The parasite is transmitted after drinking or swallowing contaminated food or water, including water swallowed while swimming. a diarrheal infection caused by the parasite Cryptosporidium. The parasite is transmitted after drinking or swallowing contaminated food or water, including w [..]

a viral disease transmitted by Aedes mosquitoes mainly in tropical and subtropical areas of the world. a viral disease transmitted by Aedes mosquitoes mainly in tropical and subtropical areas of the world.

frequent, loose, and watery bowel movements. frequent, loose, and watery bowel movements.

a serious, infectious disease that produces a toxin (poison) and an inflammation in the membrane linings of the throat, nose, trachea, and other tissues. a serious, infectious disease that produces a toxin (poison) and an inflammation in the membrane linings of the throat, nose, trachea, and other tissues.