Five Hospitalized in LA Flea-Borne Typhus Outbreak as County Cases Hit Record Highs

A Neighborhood Outbreak and a Countywide Crisis

The Los Angeles County Department of Public Health is investigating a localized outbreak of flea-borne typhus in the Pico-Union neighborhood as cases continue to rise across Los Angeles County. The outbreak, announced on July 30, is drawing fresh attention to a disease that many Angelenos may not realize has been quietly surging for years — and that can land even otherwise healthy people in the hospital.

All five people were hospitalized but have since recovered, according to the Los Angeles County Department of Public Health. While the good news is that every patient pulled through, the fact that all five required hospitalization underscores just how serious this illness can be. The outbreak and the overall increase in infections is particularly concerning because nearly nine out of 10 people diagnosed with flea-borne typhus in 2025 required hospitalization, highlighting the severity of the illness.

A Disease on the Rise

County officials reported a record 220 cases of flea-borne typhus in 2025, surpassing the previous record of 187 cases reported in 2024. The illness has steadily increased in Los Angeles County since 2010 and has affected residents ranging in age from one to 85 years old. That's not a blip — it's a trend that public health officials are watching with growing alarm.

The disease is caused by the bacterium Rickettsia typhi and is spread by infected fleas. Infections occur when feces from infected fleas are rubbed into cuts or scrapes on the skin or rubbed into the eyes. In Los Angeles County, infected fleas are commonly found on rats, free-roaming cats and opossums. In other words, the risk isn't limited to people living in unsanitary conditions — anyone whose pet ventures outside or who crosses paths with urban wildlife is potentially exposed.

Know the Symptoms, Act Quickly

Symptoms generally develop one to two weeks after infection and can include fever, headache, rash, body aches, chills, nausea and vomiting. Those symptoms can easily be mistaken for the flu, which is exactly what makes flea-borne typhus so dangerous — people may delay seeking care until the illness becomes severe. Health officials urged anyone experiencing symptoms, particularly after possible exposure to fleas or animals, to seek prompt medical care.

There is no vaccine for flea-borne typhus, but it can be effectively treated with antibiotics when diagnosed early. Flea-borne typhus is not spread from person to person, and infected animals often show no signs of illness, making prevention and flea control the most effective ways to reduce the risk of infection. That last point is critical — a rat or opossum carrying infected fleas won't look sick, giving residents no visible warning sign.

What Residents Can Do Right Now

LA County Health Officer Dr. Muntu Davis issued a direct call to action for residents. "As flea-borne typhus cases continue to increase across Los Angeles County, preventing exposure to infected fleas is more important than ever," Davis said. "Community members can help protect themselves and their neighbors by keeping pets on flea control year-round, avoiding stray animals, and making sure wildlife cannot live in or around their homes."

To reduce the risk of infection, Public Health urged residents to use flea-control products on pets year-round, keep pets indoors when possible, avoid contact with stray animals, keep yards free of debris, and secure trash containers. These are simple, low-cost steps — but they matter. With case counts climbing year after year and an active outbreak already confirmed in Pico-Union, the window for complacency in Los Angeles has closed. The question now is whether the county can reverse a trend that has been building for over a decade.