Cryptosporidium parasites are found in every region of the United States and throughout the world. Travelers to developing countries may be at greater risk for infection because of poorer water treatment and food sanitation, but<unk>  occurs worldwide. In the United States, an estimated 748,000 cases of<unk>  occur each year.
Cryptosporidiosis epidemiology and demographics
Amoebiasis epidemiology and demographics
Campylobacteriosis epidemiology and demographics
Isosporiasis epidemiology and demographics
Microsporidiosis epidemiology and demographics
Schistosomiasis epidemiology and demographics
Cholera epidemiology and demographics
Ancylostomiasis epidemiology and demographics