Prevalence of Cryptosporidium andersoni: a molecular epidemiological survey among cattle in India
- PMID: 19185428
- DOI: 10.1016/j.vetpar.2008.12.013
Prevalence of Cryptosporidium andersoni: a molecular epidemiological survey among cattle in India
Abstract
Cryptosporidiosis is an important and established cause of calfhood morbidity in bovines. The present communication reports the prevalence of Cryptosporidium infection among juvenile and adult cattle (6-24 months old) in India based on examination of faecal samples collected from 350 animals across three different agro-climatic regions of the country and further confirmation by a two-step nested PCR assay targeting 18S ssu rRNA gene. A total of 45 samples were positive for Cryptosoridium species by nested PCR assay. The PCR products were subjected to restriction fragment length polymorphism (RFLP) analysis using SspI and VspI restriction enzymes for species differentiation. The results showed that the species involved in all the samples found positive was Cryptosporidium andersoni. The overall prevalence rate was 12.85%, with highest occurrence in the northern states (14.37%) of the country. The animals between age group of 6-12 months were mostly affected (21.67%) and the season wise prevalence of infection was more during the hot and humid monsoon season (20.16%). The results clearly demonstrated that C. andersoni is the major Cryptosporidium species affecting juvenile and adult cattle in three agro-climatically different geographical regions of India. This is the first report on prevalence of C. andersoni in bovines from India the confirmation of which is based on application of nested PCR and PCR-RFLP based molecular tools.
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