An abattoir-based study of the prevalence of subclinical Johne's disease in adult cattle in south west England

Author:

Çetinkaya B.,Egan K.,Harbour D. A.,Morgan K. L.

Abstract

SUMMARYThe prevalance of subclinical Johne's disease was estimated in adult cattle slaughtered at three major abattoirs in south west England. A polymerase chain reaction (PCR) based on IS900 was used to detectMycobacterium paratuberculosisin intestinal lymph nodes of 1553 cattle. Culture was also carried out on all PCR positive and inconclusive samples. The prevalence of subclinical disease in adult cattle was 3·5% (95% confidence intervals (CI) 2·6–4·7) by PCR and 2·6% (CI 1·8–3·6) by culture. The proportion of the disease in each month ranged from 1·6% (CI 0·2–5·5) in April to 4·6% (CI 2·8–6·9) in November, but the difference was not significant (P> 0·05). The proportion of PCR positive lymph nodes in each abattoir ranged from 2·8% (CI 1·6–4·6) to 4·9% (CI 2·9–7·6), this difference was not significant either (P> 0·05). The prevalence in young cattle was 2·0% (CI 0·6–4·5). The difference between age groups was not statistically significant (P> 0·05).

Publisher

Cambridge University Press (CUP)

Subject

Infectious Diseases,Epidemiology

Reference32 articles.

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4. Comparison of a Commercial DNA Probe Test and Three Cultivation Procedures for Detection of Mycobacterium Paratuberculosis in Bovine Feces

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