ID#: 8686
This photograph depicted a dorsal view of an adult female western blacklegged tick, Ixodes pacificus. This tick has been shown to transmit Borrelia burgdorferi, the agent of Lyme disease, and Anaplasma phagocytophilum, the agent of human granulocytic anaplasmosis (HGA), which was previously known as human granulocytic ehrlichiosis (HGE), in the western United States. As a female, the small scutum, or tough, chitinous dorsal abdominal plate, does not cover its entire abdomen, thereby allowing the abdomen to expand markedly when this tick ingests its blood meal. The four pairs of jointed legs, places ticks in the phylum, Arthropoda, and the class, Arachnida.
High Resolution: Click here for hi-resolution image (7.06 MB)
Content Provider(s): CDC/ Dr. Amanda Loftis, Dr. William Nicholson, Dr. Will Reeves, Dr. Chris Paddock
Creation Date: 2006
Photo Credit: James Gathany
CDC Organization
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Copyright Restrictions: None - This image is in the public domain and thus free of any copyright restrictions.