PREVALENCE OF ANTIBODIES TO HEMOPHILUS-PLEUROPNEUMONIAE IN IOWA SWINE

  • 1 January 1982
    • journal article
    • research article
    • Vol. 43  (10) , 1848-1851
Abstract
The prevalence of complement-fixing (CF) antibodies to H. pleuropneumoniae in Iowa swine was determined by testing samples collected randomly from each of 9 crop reporting areas (9-12 counties) in Iowa in approximate proportion to the number of swine marketed annually from each area. For testing a pooled antigen composed of serotypes 1-5 of H. pleuropneumoniae was used in a modified direct Microtiter complement-fixation test. Of 7348 sera tested, 2362 or 32.1% had CF antibodies (titer .gtoreq. 1:4) to the organism. On a herd basis, 417 of 597 herds or 68.8% had at least 1 animal with CF antibodies (titer .gtoreq. 1:4) to the organism. The clinical problem with H. pleuropneumoniae has become significant in recent years, but by no means is the overt disease as prevalent as animals or herds with CF antibodies to the organism.

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