Prevalence and geographical distribution of canine hemotropic mycoplasma infections in Mediterranean countries and analysis of risk factors for infection

Veterinary Microbiology
M NovaccoRegina Hofmann-Lehmann

Abstract

Two hemoplasma species are known in dogs: Mycoplasma haemocanis (Mhc) and 'Candidatus Mycoplasma haematoparvum' (CMhp). Although their transmission routes are poorly understood, Rhipicephalus sanguineus has been suggested as a potential tick vector. The aim of the present study was to assess the prevalence, risk factors, and clinical importance of canine hemoplasmas in countries with a Mediterranean climate where R. sanguineus is highly prevalent using TaqMan real-time PCR, and to molecularly characterize the identified isolates. DNA (canine glyceraldehyde-3-phosphate dehydrogenase) was successfully amplified from all samples collected from 850 dogs in Italy, Spain, and Portugal, and 82 (9.6%) were PCR-positive for canine hemoplasmas (43 Mhc, 34 CMhp and 5 co-infected). The hemoplasma sample prevalence was significantly higher in Portugal (40%) than in Italy (9.5%) and Spain (2.5%). Risk factors for infection included living in kennels, young age, crossbreeding, and mange infection. No association was found with anemia. Phylogenetic analyses of the 16S rRNA and RNase P genes revealed >99% identity to other European isolates. In conclusion, canine hemoplasma infections were readily encountered in Mediterranean countries. The cli...Continue Reading

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