Acute Communicable
Disease Control

Contact Information
County of Los Angeles
Department of Public Health
Acute Communicable Disease Control
313 N. Figueroa Street, #212
Los Angeles, CA 90012
Phone: (213) 240-7941
Fax: (213) 482-4856

Call 211 For Information 24/7

Have questions about things like where to go for vaccinations or other health care services?

Call 2-1-1.

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Acute Communicable Disease Control
Saint Louis Encephalitis Virus (SLEV)

Saint Louis encephalitis virus (SLEV) is a mosquito-borne disease caused by a virus spread by the bite of an infected mosquito. Most people infected with SLEV will have few to no symptoms. The most common symptoms of SLEV are mild flu-like symptoms including fever and headache from 5-15 days after being infected. Severe cases can affect the central nervous system resulting in meningitis and/or encephalitis and can result in death and long-term disability. SLEV is a native arbovirus in the same virus family as West Nile virus (Flaviviridae). Although no human SLEV cases have been confirmed since 1997 in Los Angeles County, human cases have occurred elsewhere in California.

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Additional Resources
Los Angeles County Seal: Enriching lives through effective and caring services