Tick-borne pathogens detected in sheltered dogs during an epidemic of Rocky Mountain spotted fever, a One Health challenge.

Objective: To assess exposure to and infection with 3 pathogens (Rickettsia rickettsii, Anaplasma platys, and Ehrlichia canis) vectored by brown dog ticks (Rhipicephalus sanguineus) in sheltered dogs at the western US-Mexico border.

Animals: 239 dogs in shelters in San Diego and Imperial counties, US, and Mexicali and Tijuana, Mexico.

Procedures: Each dog had blood drawn and basic demographic data collected.