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Description:This 2008 photograph depicts a dorsal view of a male yellow dog tick, Amblyomma aureolatum, which is a vector of Rocky Mountain spotted fever (RMSF) in the country of Brazil.

Note that the back of this tick is completely covered by his hard, scutum, or “shield”. However, when this feature is compared with that of the female counterpart of this Ixodidae hard tick, PHIL 11069, you’ll note that the female’s dorsal abdomen is only partially covered, which allows her abdomen to greatly expand when she is ingesting her blood meal.
Rocky Mountain spotted fever (RMSF) is the most severe tick-borne rickettsial illness in the United States. This disease is caused by infection with the bacterial organism Rickettsia rickettsii.

High Resolution: Click here for hi-resolution image (36.11 MB)
Content Providers(s):CDC/ Dr. Christopher Paddock
Creation Date:2008
Photo Credit:James Gathany
Links:CDC – Div. of Viral and Rickettsial Diseases, Nat. Cntr. for Zoonotic, Vector-Borne, and Enteric Diseases; Tickborne Rickettsial Diseases; Rocky Mountain spotted fever
CDC Organization
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Copyright Restrictions:None - This image is in the public domain and thus free of any copyright restrictions. As a matter of courtesy we request that the content provider be credited and notified in any public or private usage of this image.