A six-year study on respiratory viral infections in a bull testing facility.

The Veterinary Journal
S HägglundStefan Alenius

Abstract

Viral infection dynamics and bovine respiratory disease (BRD) treatment rates were studied over six years at a Swedish bull testing station with an 'all in, all out' management system. In August of each of the years 1998-2003, between 149 and 185 4-8-month-old calves arrived at the station from 99 to 124 different beef-breeding herds, and remained until March the following year. Only calves that tested free from bovine viral diarrhoea virus (BVDV) were allowed to enter the station and original animal groups were kept isolated from new cattle in their original herds for three weeks before admission. Although neither prophylactic antibiotics, nor BRD vaccines were used, less than 0.7-13.2% (mean 5%) of the calves (n=970) required treatment for BRD during the first five weeks following entry. This was probably due, at least in part, to the season (the summer months) when the animals were commingled. In the six-month period August-February, 38% of the animals were treated one or more times for BRD and mortality was 0.7%. Hereford and Aberdeen Angus calves had significantly higher treatment rates than Charolais, Simmental and Blonde d'Aquitaine. Serological testing on samples obtained in August, November and January indicated that b...Continue Reading

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Citations

May 1, 2012·Journal of Dairy Science·M BrscicC G Van Reenen
Jul 14, 2010·The Veterinary Clinics of North America. Food Animal Practice·Bruce W Brodersen
Sep 8, 2006·The Veterinary Journal·Marcus Hutber
Jan 10, 2008·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·Nicola DecaroCanio Buonavoglia
Jul 1, 2009·Journal of Veterinary Diagnostic Investigation : Official Publication of the American Association of Veterinary Laboratory Diagnosticians, Inc·Robert W FultonAmy Reck
Dec 10, 2021·Tropical Animal Health and Production·Ömer Barış İnceAhmet Sait

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Methods Mentioned

BETA
ELISA
enzyme-linked immunosorbent assays
PCR

Software Mentioned

SAS

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