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Bartonella (B.) henselae is the zoonotic agent of cat scratch
disease. B. henselae has been associated with therapy-resistant
Lyme disease in humans suggesting that B. henselae and Borrelia burgdorferi sensu lato might be transmitted concurrently by ticks. In the present study we found that 16 (6.9%) of 230 Ixodes ricinus collected from humans harboured DNA of Bartonella spp. Fifteen positive ticks were infected with B. henselae and one tick with B. clarridgeiae. Twenty-five percent of the 16 Bartonella positive ticks were co-infected with Borrelia burgdorferi sensu lato. Our data show that B. henselae is present in Ixodes ricinus and that ticks may serve as source of infection for humans.
2010 The Authors. Clinical Microbiology and Infection; 2010 European Society of Clinical Microbiology and Infectious Diseases.