Abstract
Actinobacillus pleuropneumoniae was isolated from 95 of 265 (35.8%) swine pneumonic cases at Nagoya city abattoir during a period from November 1989 to May 1992. Of the 95 isolates, 88 (92.6%), 4 (4.2%) and 3 (3.2%) were of serovars 2, 5 and 1, respectively. The serovar 2 was widely distributed in many farms, while the serovars 1 and 5 only in some limited farms. Six of 95 (6.3%) isolates, 1 of serovar 2, 3 of serovar 1 and 2 of serovar 5, were resistant to tetracycline or kanamycin of 11 test drugs.
