CSTE Position Statement(s)
Clinical DescriptionAn illness caused by the protozoan Cryptosporidium parvum and characterized by diarrhea, abdominal cramps, loss of appetite, low-grade fever, nausea, and vomiting. Infected persons may be asymptomatic. The disease can be prolonged and life-threatening in severely immunocompromised persons
Laboratory Criteria For Diagnosis
- Demonstration of Cryptosporidium oocysts in stool, OR
- Demonstration of Cryptosporidium in intestinal fluid or small-bowel biopsy specimens, OR
- Demonstration of Cryptosporidium antigen in stool by a specific immunodiagnostic test (e.g., enzyme-linked immunosorbent assay)
ProbableA clinically compatible case that is epidemiologically linked to a confirmed case
ConfirmedA case that is laboratory confirmed
CommentsThe 1995 case definition appearing on this page was re-published in the 1997 MMWR Recommendations and Reports titled Case Definitions for Infectious Conditions Under Public Health Surveillance.1 Thus, the 1995 and 1997 versions of this case definition are identical.
- CDC. (1997). Case Definitions for Infectious Conditions Under Public Health Surveillance. MMWR, 46(RR-10), 1-55. https://www.cdc.gov/mmwr/preview/mmwrhtml/00047449.htm
- Clin Infect Dis. 2010 Apr 15;50(8):e53-55).