돼지의 haemophilus 感染症에 關한 調査硏究

Sdudies on haemophilus infection of pigs in Korea

In studies on Haemophilus infection of pigs, a series of investigation were made including on bacterial isolation, biochemical properties, antibody survey, and antimicrobial susceptibility test. Twenty-six isolates of H. pleuropneumoniae were isolated, 16 from 106 cases of porcine nasal swab and 10 from 48 cases of porcine pleuropneumonic lung, respectively. Also, 9 isolates of H. parasuis were isolated, 7 from nasal swab and 2 from lung, respectively. Therefore, a total of 35 isolates(22.7%) of Haemophilus spp. were isolated from 154 cases, but none of H. suis was isolated. The differentiation of H. pleuropneumoniae and H. parasuis could be made by means of urease and CAMP test. In tube agglutination test, the serum positive ratio were 58.5%(274) in 468 growing pigs, 86.8%(46) in 53 sows against H. pleuropneumoniae, and 52.8%(247) in 468 growing pigs, 79.2%(42) in 53 sows against H. parasuis, respectively. The cross reaction among H. pleuropneumoniae, H. parasais and H. suis were not observed in tube agglutination test. All isolates of H. pleuropneumoniae and H. parasuis were found to be highly susceptible to ampicillin, carbenicillin, cephalothin, chloramphenicol, colistin, tetracycline and linsmycin.