The prevalence of IgG antibodies to spotted fever group rickettsiae wa
s studied by the indirect immunofluorescent antibody assay in a sample
of 194 canine sera from different parts of Croatia. Dogs (n = 141) fr
om urban and suburban-semiural environs from the middle part of the ea
stern coast of Adriatic sea, and dogs (n = 53) from Zagreb, the capita
l of Croatia located in the northern continental part of Croatia, were
tested. The total of 88 (62.4%) dogs from southern coastal Croatia ha
d antibodies to Rickettsia conorii, with a significantly higher preval
ence (69.9%) in suburban-semirural areas. The prevalence rate of antib
odies to Rickettsia conorii in canine sera from urban environment in t
he north of Croatia was 20.7%. The results show that the members of sp
otted fever group rickettsiae are present in both coastal and continen
tal Croatia.