The Prevalence of Mycoplasma hyopneumoniae Antigens in Pneumonic Lungs and Serum Antibodies of Slaughtered Pigs in Jeju

제주지역 도축돼지의 페렴병변에서 Mycoplasma hyopneumoniae 항원 및 혈중 항체 조사 연구

  • Kim Seung-Il (Department of Veterinary Medicine, Cheju National University) ;
  • Yang Hyoung-Seok (Department of Veterinary Medicine, Cheju National University) ;
  • Kim Jae-Hoon (Department of Veterinary Medicine, Cheju National University) ;
  • Bae Jong-Hee (Department of Veterinary Medicine, Cheju National University)
  • Published : 2005.12.01

Abstract

Enzootic pneumonia caused by Mycoplasma hyopneumoniae is responsible for major economic losses in pig herds of world wide. Mycoplasma hyopneumoniae can also act as a primary pathogen of porcine respiratory disease complex followed by bacterial or viral infection. This study was carried out to investigate the prevalence of mycoplasmal pneumonia of slaughtered pigs in Jeju for two years. The lungs and sera of 214 cases were examined for gross and microscopic lesions of the lungs, immunohistichemistry test for Mycoplasma hyopneumoniae antigen and enzyme-linked immunohistichemistry assay (ELISA) for serum antibody titer. Pulmonary consolidation was observed in the lungs of 163 pigs $(76.1\%)$ with average gross lesion score of $6.0\%$., Bronchointerstitial pneumonia was most frequently observed $(78.5\%)$. The incidence of pulmonary consolidation was decreased in vaccinated pigs compared to that of non-vaccinated pigs. The rate of consolidation in the lungs was significantly decreased in the vaccinated pigs (P<0.05). Antigen of Mycoplasma hyopneumoniae was identified by immunohistichemistry test in the lungs of 174 pigs $(81.3\%)$. ELISh antibodies to Mycoplasma hyopneumoniae were detected in 154 pigs $(72.0\%)$. These results showed the prevalence of swine pneumonia and the incidence of Mycoplasma hyopneumoniae in slaughtered pigs of Jeiu province. We expect that these results would be helpful for the control of swine mycoplasmal pneumonia and porcine respiratory disease complex in Jeju.

Keywords

References

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