屠場搬入豚におけるHaemophilus pleuropneumoniae感染の細菌学的, 血清学的, ならびに病理学的検査

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  • Bacteriological, serological, and pathological examinations of Haemophilus pleuropneumoniae infection in 200 slaughtered pigs.
  • 屠場搬入豚におけるHaemophilus pleuropneumoniae感染の細菌学的,血清学的,ならびに病理学的検査〔英文〕
  • トジョウ ハンニュウ ブタ ニ オケル Haemophilus pleurop

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In total, 200 slaughtered pigs were bacteriologically, serologically, and pathologically examined. Haemophilus pleuropneumoniae was isolated from the nasal cavities and the lungs of clinically normal pigs. A total of 140 H. pleuropneumoniae isolates (serovar 2) were obtained from the nasal cavities and/or lungs of 106 (53%) carrier pigs originated at 48 farms; 103 (51.5%) from the nasal cavities and 37 (18.5%) from the lung lesions of porcine Haemophilus pleuropneumonia (PHP). Thirty-four of 37 pigs with PHP lesions harbored the organism both in the lung lesions and in their nasal cavities. Antibodies were detected in 103 (51.5%) of 200 pigs by the complement-fixation (CF) test. The organism was isolated from the nasal cavities of 93 (90.3%) of 103 seropositive pigs, whereas only 10 (10.3%) from those of 97 seronegative ones. None of the organism was isolated from the lungs of seronegative pigs. Most of the pigs with PHP lesions showed high CF antibody titers (≥1:16). Most of carrier pigs, therefore, might be detectable by the CF test, irrespective of location of the organisms in the host.

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