Surge in Fleaborne Typhus Cases and Deaths in Los Angeles County, CDC Reports

Cases of fleaborne typhus have nearly tripled in Los Angeles County over the past decade, with 171 reported cases in 2022. The disease is spread to humans through infected fleas that live on rodents, opossums, and cats. While it is rarely fatal, three deaths last year prompted an investigation by the CDC. Increased physician awareness and interactions between humans and carrier populations are believed to be contributing factors. Health care providers are urged to consider fleaborne typhus in patients with fever, headache, and rash, and to begin treatment promptly. Flea control products and limiting interactions with wild animals are recommended preventive measures.