Prevalence and Risk Factors for <i>Bartonella</i> spp. and Haemoplasma Infections in Cats from Greece

Bartonellosis and haemoplasmosis are vector-borne diseases with global impact on the health of domestic cats and of zoonotic importance. The aim of this study was to describe the epidemiological aspects of various populations of cats infected with <i>Bartonella</i> spp. or haemoplasma species. The populations evaluated included client-owned cats, stray cats and cats that live in breeding catteries in Greece. A total of 452 cats were prospectively enrolled into the study. A commercially available indirect immunofluorescence antibody testkit was used for the detection of Bartonella henselae IgG antibodies in serum. PCRs for the detection of Bartonella spp. and haemoplasma species DNA in the blood were also performed in a subgroup of 242 of the 452 cats. Risk factors for B. henselae seropositivity and infection with the haemoplasma species were determined using multivariable analysis. Overall, 160 (35.4%) of the 452 cats were seropositive for <i>B. henselae</i>. Seven (2.9%) and 46 (19%) of the 242 cats were PCR-positive for <i>Bartonella</i> spp. and haemoplasma species, respectively. The factors associated with <i>B. henselae</i> seropositivity, based on multivariate analysis, included older age, outdoor access, living region and flea infestation. Non-administration of ectoparasiticides was associated with haemoplasma species infection. This study shows a high prevalence of seropositivity for <i>B. henselae</i> and a relatively high prevalence of infection with haemoplasma species. Therefore, it is necessary to establish optimal strategies for the prevention of <i>Bartonella</i> spp. and haemoplasma species infections, considering the high-risk groups of cats identified in this study.