Abstract
Sera from pet cats and dogs in Yamaguchi Prefecture were analyzed by means of indirect immunofluorescence for antibodies to Bartonella henselae. Of 126 cats, 23 (18.3%) were positive for the B. henselae IgG antibody and 1 (0.8%) for the IgM antibody. The seropositive rate (3.2%: 1/31) of the B. henselae IgG antibody in young cats (<1 year old) was significantly lower than that (28.3%: 13/46) in older cats (from 1 to 3 years old)(P<0.05). Of 283 dogs, 19 (6.7%) were positive for the B. henselae IgG antibody and 10 (3.5%) for the IgM antibody. Prevalence of the B. henselae IgG antibody was significantly higher in male dogs than in female dogs (P<0.05).