Prevalence ofCryptosporidiumamong Dairy Cows in Thailand

Autor:	Roger W. Stich, Sathaporn Jittapalapong, Nongnuch Pinyopanuwat, Chutatip Siripanth, Wissanuwat Chimnoi
Rok vydání:	2006
Předmět:	Veterinary medicine Cross-sectional study animal diseases Cattle Diseases Cryptosporidiosis Cryptosporidium Biology General Biochemistry Genetics and Molecular Biology Feces Immunocompromised Host Animal science History and Philosophy of Science Zoonoses parasitic diseases Prevalence medicine Animals Humans Parasite Egg Count Dairy cattle Disease Reservoirs General Neuroscience food and beverages Raw milk Thailand biology.organism_classification Gastrointestinal parasites Dairying Diarrhea Cross-Sectional Studies Enzootic Cattle medicine.symptom
Zdroj:	Annals of the New York Academy of Sciences. 1081:328-335
ISSN:	1749-6632 0077-8923
DOI:	10.1196/annals.1373.045
Popis:	Cryptosporidium species are frequently associated with diarrhea among AIDS patients in Thailand, and dairy herds are a possible source of some of these infections. A cross-sectional study was performed to determine if Cryptosporidium is present among dairy cows in Thailand. Fecal samples were randomly collected from 363 Holstein-Friesian dairy cows from 108 of 860 farms in the Nong Pho region of central Thailand. The average prevalence of Cryptosporidium among dairy cows was 9.4%, according to an assay for Cryptosporidium-specific antigen (CSA) and 0.6% by microscopic examination of acid-fast stained feces. CSA was detected in all host age categories tested, but was most prevalent among calves (15.1%). Overall, 31.5% of farms were contaminated with Cryptosporidium infections. Fifty percent of poorly managed farms had CSA-positive cows, which were more likely to contaminate water and raw milk, while 12.9% of farms with acceptable management practices had CSA-positive cows. There was no association between the detection of Cryptosporidium and other gastrointestinal parasites. These results indicate that Cryptosporidium is enzootic among Thai dairy cattle, and suggest that cattle could have a role in zoonotic cryptosporidiosis in Thailand.
Databáze:	OpenAIRE
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