Record Typhus Cases in Los Angeles County
Los Angeles County is facing an unprecedented rise in flea-borne typhus cases, with nearly 90% of individuals affected requiring hospitalization.
Typhus is a bacterial infection transmitted by infected fleas, and its symptoms can vary significantly, from mild discomfort to severe illness. Health officials warn that the risk is present for everyone, regardless of pet ownership.
“These cases have been increasing year after year, impacting various areas throughout our county,” remarked Dr. Aiman Halai, a Medical Epidemiologist with the Los Angeles County Department of Public Health.
In 2025, there were 220 reported typhus infections in L.A. County, a rise from 187 cases in 2024. Dr. Halai noted that 90% of those bitten by infected fleas ended up hospitalized.
“Some individuals may develop serious conditions affecting multiple organ systems, which can lead to fatalities,” she added.
Symptoms such as fever, headache, nausea, body aches, vomiting, and rashes typically manifest one to two weeks after a flea bite.
On a brighter note, typhus is not spread directly from person to person. Infected fleas primarily inhabit rats, free-roaming cats, and opossums. It’s worth noting that your dog or cat can be exposed without exhibiting any signs of illness, leaving you vulnerable to the disease.
“Fleas can stay on your pet even if they’re healthy, which means you could still be at risk of getting sick,” explained Dr. Halai.
To reduce the risk, health officials recommend consistent flea control for pets, avoiding contact with stray animals, and not leaving pet food outside. Furthermore, keeping vegetation well-trimmed and reducing clutter around homes can help deter rodents.
Securing outdoor trash bins is also important. While many severe cases have been documented, there may be numerous additional local infections that haven’t been recorded.
Prompt antibiotic treatment, like doxycycline, is crucial for managing flea-transmitted typhus to avoid serious complications. Last year, local outbreaks were investigated in Central L.A., Santa Monica, and the unincorporated area of Willowbrook.
