ID#: 31722
Caption:
This image depicts a dorsal view of an adult male brown dog tick, Rhipicephalus sanguineus, collected from a dog at a veterinary clinic in Flagstaff, Arizona. This tick species can transmit the bacterium Rickettsia rickettsii, the causative agent of Rocky Mountain spotted fever (RMSF), to both humans and dogs. It can also transmit the bacterium Ehrlichia canis, the cause of canine ehrlichiosis, and the protozoa Babesia canis and Babesia gibsoni, both of which cause canine babesiosis. In addition, it may transmit Bartonella spp. bacteria to dogs, resulting in canine bartonellosis. Unlike most tick species, R. sanguineus can complete its entire life cycle indoors, leading to severe household and kennel infestations.
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Content Provider(s): CDC/ Dr. Gary Alpert; PhD
Creation Date: 2026
Photo Credit: Anna Kang; Dr. Gary Alpert; PhD
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Copyright Restrictions: Permission is not required for public domain images, however, these images are provided by CDC and are available for personal, professional, and educational use with appropriate attribution. Redistribution must credit CDC and, where known, the individual photographer, and identify the CDC website as the free source. For additional terms see Use of Agency Materials | Other | CDC