TY - JOUR AU - Howe, Andrew AU - Forster, Sue AU - Morton, Stephen AU - Marshall, Roberta AU - Osborn, Keith AU - Wright, Peter AU - Hunter, Paul T1 - Cryptosporidium Oocysts in a Water Supply Associated with a Cryptosporidiosis Outbreak T2 - Emerging Infectious Disease journal PY - 2002 VL - 8 IS - 6 SP - 619 SN - 1080-6059 AB - An outbreak of cryptosporidiosis occurred in and around Clitheroe, Lancashire, in northwest England, during March 2000. Fifty-eight cases of diarrhea with Cryptosporidium identified in stool specimens were reported. Cryptosporidium oocysts were identified in samples from the water treatment works as well as domestic taps. Descriptive epidemiology suggested that drinking unboiled tap water in a single water zone was the common factor linking cases. Environmental investigation suggested that contamination with animal feces was the likely source of the outbreak. This outbreak was unusual in that hydrodynamic modeling was used to give a good estimate of the peak oocyst count at the time of the contamination incident. The oocysts’ persistence in the water distribution system after switching to another water source was also unusual. This persistence may have been due to oocysts being entrapped within biofilm. Despite the continued presence of oocysts, epidemiologic evidence suggested that no one became ill after the water source was changed. KW - Cryptosporidium Oocysts in a Water Supply Associated with a Cryptosporidiosis Outbreak KW - United Kingdom DO - 10.3201/eid0806.010271 UR - https://wwwnc.cdc.gov/eid/article/8/6/01-0271_article ER - End of Reference