Skip to main content
King County logo
  • Disease facts by alphabetized groups

  • Key topic highlights

Suspected case of a rare disease linked to raccoon roundworms (5/8/17)

Health experts suspect that a King County toddler may have contracted Baylisascaris infection, a very rare disease associated with accidental ingestion of roundworm eggs found in dirt or other substances that have been contaminated by raccoon droppings.

Two cases of hantavirus reported in King County since 2016

Hantavirus can cause a rare but deadly disease called Hantavirus Pulmonary Syndrome (HPS). In Washington State hantavirus is carried primarily by deer mice. Over the last several months, two people in King County have become ill with HPS, and one person died.

Mumps outbreak in King County

Public Health is investigating an emerging mumps outbreak in King County. Find out the latest details on our blog and listen to Health Officer Dr. Jeff Duchin respond to common questions.

Foodborne illness outbreak summaries

Public Health's Communicable Diseases, Epidemiology and Immunizations office teams up with food inspectors to investigate cases of possible foodborne illnesses in King County.

Zika virus updates

Zika is primarily spread through the bite of infected Aedes aegypti and Aedes Albopictus mosquitoes. Washington state does not have these species of mosquitoes, so currently there is no risk in King County of Zika spreading locally.