In Sapporo, Hokkaido, a female and 5 male cats were affected with feline infectious anemia. All of them were suffering from splenomegaly, in addition to anemia, anorexia, and depression, and two of them from mild icterus and hemoglobinuria. Hematological examination of 5 cats revealed a marked decrease in erythrocytic resistance and the presence of erythrocytes containing granules positive for Prussion blue staining. In 2 cats, there was an increase in large-lymphocyte-like monocytes in the course of disease. These cells often phagocytized erythrocytes. The direct Coombs test was positive in four of 5 cats tested. Hemobartonella felis was found in erythrocytes.
Apparently healthy pigs, totaling 436, were examined for the presence of Yersinia in ileocecal contents.Yersinia enterocolitica (YE) was detected from 25 of them andY. pseudotuberculosis (YP) from one. The YE strains isolated were classified serologically as follows: 0: 3 (6 strains), 0: 5 (12 strains), 0: 7 (1 strain), 0: 10 (1 strain), 0: 11 (1 strain), the remaining 4 strains reacting with none of antisera 0: 1 to 0: 34. TheYPstrain isolated belonged to type II. There was a tendency forYEto be detected at a low rate in the hot season. Whether swine carryYEor not seems to be dependent upon the eivironmental condition of raising. The detection ofYEwas more readily from the ileocecal contents than from the gastric, jejunal, or rectal contents. when it had been tried by the PBS enrichment method.
TCND vaccine seemed to be affected with maternal antibody. Hemagglutination-inhibiting (HI) titer was significantly higher (p<0.05) in chicks vaccinated at 4 weeks of age than in those at 3 weeks of age. It was not presumed that at 4 weeks of age antibody production after inoculation with TCND vaccine might be inhibited in chicks which had been administered with B1 vaccine in drinking water once 4 days of age or twice at 4 days and 2 weeks of age. There was a statistically significant (P<0.01) negative correlation between HI titer before inoculation with TCND vaccine and HI titer increasing 2 weeks after the inoculation. It was assumed that the higerh HI titer before inoculation, the more severely antibody production by TCND vaccine might be inhibited. This inhibition seemed to be reduced in degree with the advance in age.