CDC warns travelers to Mexico's Baja California of exposure to deadly Rocky Mountain spotted fever

The U.S. Centers for Disease Control and Prevention is warning travelers to Baja California, Mexico, about Rocky Mountain spotted fever, a potentially fatal bacterial disease that spreads through the bite of an infected brown dog tick, which can be carried by pets. 

The warning comes after a San Diego, California, resident who traveled to Baja California died last month after contracting the disease, San Diego County Public Health Services reported. 

In addition to Baja California, RMSF has been found in the Mexican states of Sonora, Chihuahua, Coahuila and Nuevo León.