Case of the week 263

Source:  Case of the week 263    Tag:  rocky mountain spotted fever images
This beautiful photograph was donated by Susan Crowe, a professional wildlife photographer and friend of one of our parasitology blog colleagues (Lee).  She found this presumptive Dermacenter sp. tick on her dog.   

 So the question for the day - what is possible pathogen that this tick can transmit in the U.S.?