Skip Navigation LinksRocky-Mountain-Spotted-Fever

Office of Binational Border Health

Border Infectious Disease Surveillance - Rocky Mountain Spotted Fever

Background

Rocky Mountain Spotted Fever (RMSF) is a tick-borne disease characterized by fever, headache, rash, and thrombocytopenia, and can lead to sepsis, chronic sequelae, and death. In 2024, a total of 53 RMSF cases and 26 fatalities were reported in Mexicali, a Mexican city that borders Imperial County, CA. 

Recently, BIDS staff collaborated with the CDPH Vector-​Borne Disease Section​​ on an investigation into six cases of Rocky Mountain spotted fever with exposure i​n Tecate, Baja California that were reported to CDPH between July 2023 - January 2024. An article summarizing this investigation was published in November 2024 in Centers for Disease Control and Prevention Morbidity and Mortality Weekly Report​ 


​​
Page Last Updated :