Although many types of Escherichia coli (E coli) bacteria live normally in the intestinal tract, at least 5 types are known to cause diarrhea. Shiga toxin–producing E coli has caused numerous outbreaks in group care settings. Infections with Shiga toxin–producing E coli may be associated with other

An illness in which someone develops more watery and frequent stools than is typical for that person. Diarrhea can be caused by changes in diet, such as drinking excessive amount of fruit juice, eating more than the usual amounts of certain foods, and the use of some medications. Diarrhea also can be

There are 2 common types of ear infections: otitis media (middle ear infection) and otitis externa (swimmer’s ear). Most ear infections of young children occur in the middle ear.

Fever is an elevation of the normal body temperature. Fever is most commonly caused by a viral or bacterial infection, but it can be a sign of illnesses not caused by infections, such as exercising in a very warm environment, rheumatoid arthritis, a reaction to a vaccine or medication, or cancer.

Common viral infection with rash occurring 1 to 3 weeks after infection

An intestinal infection caused by a parasite (Giardia intestinalis)

Human immunodeficiency virus (HIV) infection affects the body in a wide variety of ways. In the most severe infection, the virus progressively destroys the body’s immune system, causing a condition called acquired immunodeficiency syndrome (AIDS). With early testing and appropriate treatment, children

Depends on the site of infection. May include