C. hominis causes the disease, Cryptosporidiosis. The symptoms are: diarrhea, vomiting, anorexia, fever, and abdominal cramping. The respiratory system can be affected as well. It is usually self-limiting, but can be harmful to immunocompromised individuals.

Microbial Group: 
Protozoan

Cryptosporidium parvum causes cryptosporidiosis, a parasitic infection. The symptoms of cryptosporidiosis are: watery diarrhea, stomach cramps, dehydration, nausea, vomiting, fever, and weight loss. In healthy people, the disease created by the parasite is self-limiting, but in immunosuppressed individuals, the disease may be chronic and severe.

Microbial Group: 
Protozoan

Cyanobacteria can produce toxins called cyanotoxins, this comes from the blooms that form. Health effects associated with exposure to cyanobacteria are: stomach and intestinal illness, breathing problems, allergic reactions, skin irritation, liver damage, and neurotoxic reactions.

Microbial Group: 
Bacterium

Mortality was higher in infants with severe hepatitis (83%) than in infants with infection of the central nervous system (19%) (Modlin, 1986)

Microbial Group: 
Virus

Case fatality rates associated with amebic colitis range from 1.9%-9.1% (Aristizábal et al, 1991)

Microbial Group: 
Protozoan

Hand, Foot, and Mouth Disease caused by enterovirus in China between 2008 and 2009 was studied and the case fatality ratio was 0.03% (Zhang et al, 2011)

Microbial Group: 
Virus

The overall mortality rate for E. coli O157:H7 is <1%. For those who develop hemolytic uremic syndrome, the death rate is between 3-5% (www.azdhs.gov)

Microbial Group: 
Bacterium

Untreated, tularemia has a mortality rate of 5-15%; this rate is even higher with the typhoidal form. Appropriate antibiotics lower this rate to about 1% (Medscape)

Giardiasis is not associated with mortality except in rare cases of extreme dehydration, primarily in infants or malnourished children (Medscape)

Microbial Group: 
Protozoan

Giardia muris is a parasite that causes the disease giardiasis, Some symptoms of Giardiasis are: diarrhea, gas, greasy stool, nausea, cramps, and dehydration.

Microbial Group: 
Bacterium