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

Update for Medical Providers: Apparent Mycobacterium abscessus Infections Associated with a Local Dental Clinic

November 29, 2016
Apparent Mycobacterium abscessus dental infections have been reported in some patients cared for at the 2156 East Lincoln Avenue office of Children's Dental Group in Anaheim. Oral cellulitis, often with dental abscess, has been reported following dental pulpotomy procedures. The facility is continuing to work with the Orange County Health Care Agency to address the situation.


Pediatric E. coli O157:H7 Infections in Santa AnaNovember 21, 2016
The Orange County Health Care Agency has had an increase in reports of pediatric Escherichia coli (E. coli) O157:H7 infection since the start of November. Four cases have been reported with illness onsets ranging from November 4-9. The cases range from 5-8 years in age; all live in the city of Santa Ana. One child developed hemolytic uremic syndrome (HUS). An investigation into a potential source is ongoing. Providers should consider E. coli O157:H7 infection in patients with bloody or unusually severe diarrhea and when appropriate send stool for testing for shiga toxin-producing E. coli (STEC).

Recall of Frozen Strawberries Potentially Contaminated with Hepatitis A Distributed Nationally, Including in Orange CountyNovember 2, 2016
A large recall of frozen strawberries from Egypt has been issued due to the potential for hepatitis A contamination. This voluntary recall was issued as part of an ongoing Food and Drug Administration (FDA) and Centers for Disease Control and Prevention (CDC) investigation of a multi-state hepatitis A outbreak linked to frozen strawberries mainly on the East Coast.

Hepatitis A Cases in Orange County ResidentsOctober 24, 2016
Three cases of hepatitis A virus (HAV) infection have been diagnosed in Orange County residents in the last month.

CD Connection Newsletter - OctoberOctober 19, 2016
First West Nile Virus-Associated Death of 2016 Reported in Orange County