eastern equine encephalitis

noun

variants or Eastern equine encephalitis or less commonly eastern equine encephalomyelitis or Eastern equine encephalomyelitis

: equine encephalitis occurring in the eastern U.S. and Canada : equine encephalitis sense a

With the state reporting outbreaks of the mosquito-borne West Nile virus and eastern equine encephalitis, North Andover moved its game against Silver Lake High School from Friday night to yesterday afternoon to limit players and spectators' exposure to mosquitoes.

—Michael Kunzelman

The deadliest mosquito-borne viral infection is Eastern equine encephalitis, a disease of the Atlantic and Gulf Coasts that can strike people of all ages with a mortality rate of 30 percent to 50 percent.

—Jane E. Brody

—abbreviation EEE

called also triple E

Examples of eastern equine encephalitis in a Sentence

Recent Examples on the Web

Approximately 30% of people who develop severe eastern equine encephalitis die, and many survivors have ongoing neurologic problems. — Stephen Underwood, Hartford Courant, 5 Nov. 2026

The United States now regularly documents cases of West Nile virus, along with rarer infections like eastern equine encephalitis (EEE) and dengue fever. — Tom Gavin, EverydayHealth.com, 21 Sep. 2026

Michigan's second case of Eastern equine encephalitis (EEE) in a domestic animal in 2026 has been detected in a horse in Roscommon County. — Joseph Buczek, CBS News, 9 Sep. 2026

Lee said regular surveillance is conducted for mosquito species capable of transmitting West Nile and eastern equine encephalitis viruses. — Cailey Gleeson, jsonline.com, 25 Aug. 2025

Word History

First Known Use

1933, in the meaning defined above

Rhymes for eastern equine encephalitis

• adenitis
• arteritis
• cervicitis
• cholangitis
• choroiditis
• decubitus
• dermatitis
• fasciitis
• gingivitis
• hepatitis
• iritis
• keratitis

Medical Definition

eastern equine encephalitis

noun

east·​ern equine encephalitis ˌē-stərn- 

variants or Eastern equine encephalitis also eastern equine encephalomyelitis or Eastern equine encephalomyelitis

: equine encephalitis occurring in the eastern U.S. and Canada : equine encephalitis sense a

—abbreviation EEE

called also triple E