The prevalence of Bartonella species was investigated among wild carnivores of the suborder Caniformia, including 15 Japanese badgers (Meles anakuma), 8 Japanese martens (Martes melampus), 2 Japanese weasels (Mustela itatsi), 1 Siberian weasel (Mustela sibirica), 171 raccoon dogs (Nyctereutes procyonoides), and 977 raccoons (Procyon lotor) in Japan. Bartonella bacteria were isolated from one Japanese badger (6.7%) and from one Japanese marten (12.5%); however, no Bartonella species was found in other representatives of Caniformia. Phylogenetic analysis was based on concatenated sequences of six housekeeping genes (16S rRNA, ftsZ, gltA, groEL, ribC, and rpoB) and sequence of the 16S-23S internal transcribed spacer region. The sequence analysis indicated that the isolate derived from the Japanese badger (strain JB-15) can represent a novel Bartonella species and the isolate from the Japanese marten (strain JM-1) was closely related to Bartonella washoensis. This is the first report on isolation of Bartonella from badger and marten.
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