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

Published online by Cambridge University Press:  15 May 2009

B. Çetinkaya ,
K. Egan ,
D. A. Harbour  and
K. L. Morgan
B. Çetinkaya
Affiliation:
Epidemiology Group, Division of Animal Health and Husbandry, University of Bristol, Landford House, Landford, Bristol BS18 7DU
K. Egan
Affiliation:
Epidemiology Group, Division of Animal Health and Husbandry, University of Bristol, Landford House, Landford, Bristol BS18 7DU
D. A. Harbour
Affiliation:
Epidemiology Group, Division of Animal Health and Husbandry, University of Bristol, Landford House, Landford, Bristol BS18 7DU
K. L. Morgan*
Affiliation:
Epidemiology Group, Division of Animal Health and Husbandry, University of Bristol, Landford House, Landford, Bristol BS18 7DU
*
* Author for correspondence. Current address: Department of Veterinary Clinical Science and Animal Husbandry, University of Liverpool, Leahurst, South Wirral L64 7TE
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The 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 detect Mycobacterium paratuberculosis in 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).

Type
Special Article
Information
Epidemiology & Infection , Volume 116 , Issue 3 , June 1996 , pp. 373 - 379
Copyright
Copyright © Cambridge University Press 1996

References

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