
Berkeley Alerts About Rat-Borne Leptospirosis Near Encampments
Berkeley health officials warned that leptospirosis, a treatable but potentially deadly rat-borne disease, has been detected in and around a homeless encampment near Harrison Street, with numerous rats and at least two dogs testing positive in 2025. An alert urges encampment residents to leave a red zone bounded by San Pablo Avenue, Gilman Street, Codornices Creek and the railroad tracks, and the city plans to clear encampments and disinfect the area. The disease spreads via infected animal urine and can cause flu-like symptoms 2–30 days after exposure, potentially leading to kidney or liver failure or meningitis if untreated. UC Berkeley also urged residents to take standard precautions like good hygiene and keeping pets away from areas with rodent activity.













