Los Angeles County Reports Record Surge in Flea-Borne Typhus Cases, Raising Public Health Concerns
Los Angeles County is experiencing a significant increase in flea-borne typhus cases, with health officials reporting a record number of infections in 2025. The Los Angeles County Department of Public Health issued a bulletin warning residents about the surge, noting that the number of cases has risen nearly 20% from the previous year. In 2025, the county recorded the highest-ever number of typhus cases, with nearly 9 out of 10 infected individuals requiring hospitalization. The disease, which is spread by fleas, poses a serious health risk, particularly to those in close proximity to rats or other rodents. The resurgence of typhus is part of a broader trend of increasing vector-borne illnesses, attributed to rising temperatures and human activity, which expand the geographic range and breeding seasons of disease vectors like fleas, ticks, and mosquitoes.