Seroprevalence of Mycobacterium paratuberculosis in dairy cattle in the Lima valley

Q. Alfredo Benito, G. Hermelinda Rivera

Research output: Contribution to journalArticlepeer-review


© 2018 Universidad Nacional Mayor de San Marcos. All rights reserved. This study reports the seroprevalence of Mycobacterium paratuberculosis, the causative agent ofJohne's disease, in Peruvian dairy herds. ELISA tests (HerdCheck, IDEXX, USA) were performed on 346 serum samples collectedfrom 18 herds in the Lima valley during 1997. Antibodies against M. paratuberculosis were found in 13.3% (46/346) of the cows and half(9118) ofthe herds tested. The incidence ofreactors in the infected herds (16.1 % = 46 /286) varied between 2.9 to 46.2%. ELISA optical density values ranged from 0.30 to 0.69 in 78.2% (36/46) and O.7 to>2.0 in 21.7% (10/46) ofthe positive serum samples, confirming the presence of Johne's disease in dairy herds from the Lima valley.
Original languageAmerican English
Pages (from-to)33-38
Number of pages6
JournalRevista de Investigaciones Veterinarias del Peru
StatePublished - 1 Jan 1999


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