Epidemiology & Assessment

The Epidemiology and Assessment unit’s medical directors, public health nurses, and epidemiologists investigate individual cases and outbreaks of reported communicable disease (see List of Reportable Diseases) per the State of California Code of Regulations. We monitor disease trends, and often provide current statistics and other information to doctors, hospitals, the public and news media. For more information or CD reporting 24/7 call 714-834-8180.

For questions or comments, please email epi@ochca.com.

Latest News & Health Advisories

Provider Advisory: Orange County's First West Nile Virus Human Infection of the Season ReportedAugust 8, 2018
A Tustin woman in her 70s was diagnosed this week with West Nile Virus (WNV) neuroinvasive disease. This is the first human WNV infection identified in Orange County this season. Human infections have already been reported this season in the surrounding counties of Los Angeles, Riverside, and San Bernardino.

CD Connection Newsletter - JulyJuly 31, 2018
Antibiotic-Resistant Shigellosis in Orange County Overview

Provider Advisory: First West Nile Virus Positive Mosquito SampleJuly 10, 2018
The First West Nile Virus Positive Mosquito Sample has been Identified in Orange County

CD Connection Newsletter - JuneJune 29, 2018
Endemic (Flea-Borne) Typhus Update
Flea-borne typhus is endemic in Orange County and cases may occur at any time. Incidence generally increases in the upcoming summer months in our area. Clinicians should consider typhus in patients with compatible symptoms and send testing.

CD Connection Newsletter - MayMay 31, 2018
May is Hepatitis Awareness Month
Hepatitis is inflammation of the liver which can result from infectious and noninfectious causes.