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South Lake Tahoe Resident Tests Positive for Plague After Likely Flea Bite

Health leaders say the case is rare, treatable, with low risk for the wider community.

A bubonic plague warning sign is displayed at a parking lot near the Rocky Mountain Arsenal Wildlife Refuge, Saturday, Aug. 10, 2019, in Commerce City, Colo. A South Lake Tahoe resident has tested positive for plague, health officials confirmed this week — the first reported human case in El Dorado County since 2020.
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FILE: A person feeds a chipmunk in Lake Tahoe. Health officials advise against feeding wild animals in order to avoid contracting plague. 

Overview

  • The resident is recovering at home under medical care, according to El Dorado County officials.
  • Authorities are investigating the exposure, and neither the patient’s identity nor the specific form of plague has been disclosed.
  • This is the county’s first reported human case since 2020, and early antibiotic treatment is typically effective.
  • Surveillance identified 41 rodents exposed to Yersinia pestis from 2021–2024 and four additional positives in 2025, all in the Tahoe Basin.
  • Public guidance urges avoiding wild rodents, leashing pets with flea control, and using long pants and DEET-based repellents when outdoors.