Pregnant women who become infected during pregnancy may pass the disease to their fetuses. In infants infected before birth, fatal results are common. Should the infant survive, the effects of infection are typically severe. T. gondii has been found in all food animals. Humans become infected by 1.
Children are particularly susceptible.
Cryptosporidiosis can be life-threatening in persons with compromised immune systems. Another waterborne outbreak in Las Vegas resulted in at least 20 deaths. The first large outbreak of cryptosporidiosis from a contaminated food occurred in 1993 and was attributed to fresh-pressed apple cider. Cryptosporidium is found in feces of infected mammals and has been transmitted through contaminated water and food. Norwalk virus Norwalk viruses cause sporadic and epidemic gastrointestinal disease with dehydrating diarrhea.