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Cryptosporidiosis (Cryptosporidium parvum)
1995 Case Definition
The 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 [MMWR 1997;46(RR10)]
(available at http://www.cdc.gov/mmwr/preview/mmwrhtml/00047449.htm).
Thus, the 1995 and 1997 versions of this case definition are identical.
Clinical description
An 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)
Case classification
Probable: a clinically
compatible case that is epidemiologically linked to a confirmed
case
Confirmed: a case that is laboratory confirmed
See also:
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