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. 1998 Sep 1;39(3):325–330. doi: 10.1186/BF03547780

The Prevalence of Mycoplasma hyopneumoniae in Pig Herds in Western Finland Based on the Demonstration of Antibodies in Colostrum by ELISA

E Rautiainen 13,23,✉
PMCID: PMC8050662  PMID: 9787495

Abstract

Swine enzootic pneumonia causes heavy economical losses in fattening herds. The aim of this study was to get an estimate of the prevalence of Mycoplasma hyopneumoniae in the province of Vaasa in Western Finland. There were 112 farrowing herds randomly chosen for a survey. Farmers were asked to milk colostrum samples from every sow. Owners of 22 herds did not send enough samples for a herd diagnosis. Altogether 1773 samples (mean 18.1 samples/herd) were analysed in an indirect ELISA for antibodies to Mycoplasma hyopneumoniae. Thirty-five herds were concluded to be infected with Mycoplasma hyopneumoniae. In these herds the mean prevalence of samples with antibodies was 16.3% (range 2.3%-70.0%, median 8.6%). The infected herds were significantly larger than the rest of the herds (no. of sows 27.0 vs. 18.4 respectively). The true prevalence of Mycoplasma hyopneumoniae infec-tion in the province of Vaasa was estimated to be somewhat lower than the apparent prevalence of 39%. The application of colostrum serology is discussed.

Keywords: swine enzootic pneumonia, survey, carrier, bias, sensitivity, specificity, positive pre-dictive value

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Acknowledgments

This study was supported by the provincial govern-ment of Vaasa and by the local slaughterhouses Itikka, Pohjanmaan Liha, Pouttu, Snellman and Saar-ioinen. The author wants to thank Veikko Tuovinen, Pirjo Veijalainen, Anna-Maija Virtala and Per Wallgren for valuable comments.

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