Record Number of Flea-Borne Typhus Cases Reported in Los Angeles County in 2025

Cases reported in Los Angeles County include patients aged 1 to 85, health officials reported.

People are often exposed to the infection when fleas are carried indoors by pets or other animals, Los Angeles County health officials said. YuryKara/Shutterstock

Los Angeles County health officials said on April 2 that a record number of flea-borne typhus cases were reported in 2025.

Last year, the county’s health department identified 220 cases, the highest-ever number recorded in the county, according to the Los Angeles County Department of Public Health.