Control of Johne's disease in four commercial dairy herds in Iowa

Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc
Charles O Thoen, L A Moore

Abstract

A 6-year study was conducted in 4 dairy herds in Iowa in which Johne's disease was diagnosed previously. Fecal specimens were collected at 6-month intervals from animals 2 years of age and over for mycobacteriologic examination. Serum samples were obtained at 3-month intervals and tested by enzyme-linked immunosorbent assay (ELISA). The antigen used in the ELISA was a potassium chloride extract of a field strain of Mycobacterium paratuberculosis. The ELISA reactions were observed in 87% of the cows from which M. paratuberculosis was isolated. Dairy producers that participated in the Johne's control program reported reduced economic losses. Increased income was attributed to improved milk production, increased value of vaccinated animals sold as replacements to other dairy herds in which Johne's disease had been diagnosed, and the increased market value of slaughter animals removed from the herd.

References

Aug 1, 1988·RöFo : Fortschritte auf dem Gebiete der Röntgenstrahlen und der Nuklearmedizin·R StiglbauerB Schwaighofer
Aug 15, 1987·The Veterinary Record·G BenedictusJ Stelwagen

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Citations

Jul 1, 1990·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·C O Thoen, K J Waite
Jun 16, 1992·Annals of the New York Academy of Sciences·J V FigueroaG M Buening
Mar 2, 2005·The Veterinary Record·S Sternberg LewerinG Bölske
Jul 1, 1996·The Veterinary Clinics of North America. Food Animal Practice·C A Rossiter, W S Burhans

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