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KMID : 0359319950350020297
Korean Journal of Veterinary Research
1995 Volume.35 No. 2 p.297 ~ p.306
Biochemical characteristics and capsular serotypes of Streptococcus suis isolated from pneumonic lungs of slaughter pigs



Abstract
The present study was conducted to investigate the incidence of Streptococcus suis infection in the pneumonic lungs of slaughter pigs from December 1992 to April 1994 and to examine the biochemical and cultural properties, the antimicrobial susceptibility and serotype of the isolates.
Fifty-six(7.95%) strains of S suis was isolated from 704 pneumonic lungs of slaughter pigs, of which 33 cultures were isolated alone, while remaining 18 were complicated wide Pasteurella multocida. Of the 56 S suis isolates, 18(32.1%) were serotype 2, 5(8.9%) were serotype ¨ö, 2 were serotype 1, 1 each for serotype 3 & 5, and the remaining 29 were untypable.
The twenty five strains(44.6%) of all isolates produced hyalurondase while 15 strains(88.3%) of 18 serotype 2 isolates were hyaluronidase producers. All of isolates were highly susceptible to ampicillin, amoxicillin, ceftiofur, cephalothin, ciprofloxacin and penicillin G, although the majority of them were resistant to kanamycin, colistin, erythromycin, oxytetracycline.
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