Journal of the Japan Veterinary Medical Association
Online ISSN : 2186-0211
Print ISSN : 0446-6454
ISSN-L : 0446-6454
Prevelence of Porcine Reproductive and Respiratory Syndrome Virus in Chiba Prefecture
Osamu HIROSEHirosi KUDOShigekatu YOSHIZAWATadao HIROIKETakasi NAKANE
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1995 Volume 48 Issue 9 Pages 650-653

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Abstract

In 1993 46.4% of test sera from Chiba Prefecture had antibody against porcine reproductive and respiratory syndrome (PRRS) virus and serological survey was retrospectively done with sera collected in 1988 when similar clinical signs were recorded in North-Eastern Chiba Prefecture. Antibody to PRRS virus was detected in sera collected in June 1988 from fattening pigs by indirect immunofluorescence. The decreases in the number of piglets weaned per sow were from 2.35 to 2.59 per year at the first outbreak in 1988.

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