Los Angeles County health officials reported a record 220 cases of flea-borne typhus in 2025, marking the highest number ever recorded in the county. The Los Angeles County Department of Public Health confirmed the figures, noting a significant increase from the 187 cases in 2024. Nearly 9 out of 10 infected individuals required hospitalization, according to public health officials.
Immediate Action & Core Facts
Flea-borne typhus, caused by the bacterium Rickettsia typhi, spreads when fleas infected by animals like rats, stray cats, or opossums transmit the disease to humans. The infection occurs when flea feces enters cuts, scrapes, or the eyes. The county identified three localized outbreaks in 2025: central Los Angeles, Santa Monica, and Willowbrook near Compton.
Deeper Dive & Context
Rising Cases Over Time
The number of typhus cases in Los Angeles County has fluctuated in recent years, with 141 cases in 2021, 171 in 2022, and a slight decrease to 124 in 2023 before rising again in 2024. Cases tend to peak during late summer and fall due to increased flea activity in warmer weather.
Prevention and Risk Factors
Public health officials emphasize preventive measures, particularly for pet owners, to reduce exposure. These include regular flea treatments for pets, keeping animals indoors, and avoiding contact with stray animals. The Centers for Disease Control and Prevention (CDC) advises cleaning areas where fleas may thrive and using insect repellent when outdoors.
Geographic Hotspots
The outbreaks in central Los Angeles, Santa Monica, and Willowbrook highlight areas with higher flea populations and potential animal carriers. Health officials urge residents in these regions to take extra precautions.
Long-Term Implications
The rising cases raise concerns about urban pest control and public health infrastructure. Officials are evaluating strategies to mitigate future outbreaks, including increased surveillance and community education.