38. Flea-Borne Typhus: Tips for Pet Owners

In California (and elsewhere) Flea-borne typhus is seeing a dramatic resurgence, with Los Angeles County reporting an all-time high of 220 cases in 2025. Despite being a treatable bacterial infection caused by Rickettsia typhi, nearly 90% of identified patients recently required hospitalization.In this episode, we explore how this disease spreads from urban wildlife—like rats, opossums, and stray cats—to humans via pets. We discuss the non-specific symptoms that make it difficult to diagnose, the critical importance of early doxycycline treatment, and the simple steps you can take to protect your home and pets from becoming part of the transmission cycle.Key Takeaways:Why "flea dirt" is the primary source of human infection.The role of the cat flea and Oriental rat flea in suburban and urban settings.Preventative measures: From securing trash bins to year-round pet flea control.Why clinicians must consider typhus even when a flea bite isn't remembered.