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Communicable Disease Control Division

The HCA Public Health Services Communicable Disease Control Division is committed to preventing and controlling the spread of infectious disease in our community. We work collaboratively with local healthcare providers, government agencies, and community partners to identify outbreaks of disease and develop strategies to limit their further spread. Our team monitors disease surveillance data to track trends over time and to define emerging concerns and vulnerable populations. We provide clinical and epidemiological guidance to residents, providers, and the broader community. In addition, we may also assist with diagnosis, treatment, and preventative services such as vaccination and prophylactic treatment when needed. 

The Communicable Disease Control Division is dedicated to protecting the health and wellbeing of our community. Together we can prevent and control the spread of communicable diseases.

For more information or CD reporting 24/7 call 714-834-8180, you can also email us at epi@ochca.com.

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Latest News and Health Advisories

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CAHAN - Increased Hepatitis A Cases Associated with Homelessness, Drug Use in San Diego County

Twenty-eight acute hepatitis A virus (HAV) infections have been confirmed in San Diego County residents with symptom onset between January 10, 2023, and May 4, 2023. Ages of the...

CD HEALTH ALERT: Universal Screening and Testing Recommendations for Hepatitis B Virus (HBV) and Hepatitis C Virus (HCV)

The CDC recently released new recommendations for Screening and Testing for Hepatitis B Virus infection. These guidelines mirror existing CDC Recommendations for Hepatitis C...

CD HEALTH ALERT: National Shortage of Bicillin L-A

CDC has received reports that some STD programs are currently unable to procure enough penicillin G benzathine (Bicillin L-A®) – the first-line recommended treatment for syphilis –...

CD HEALTH ALERT: Updated Recommendations for the Use of Bivalent mRNA COVID-19 Vaccines

On April 18, 2023, the U. S. Food and Drug Administration (FDA) amended the emergency use authorizations (EUAs) of Moderna and Pfizer-BioNTech COVID-19 bivalent mRNA vaccines. This...

CAHAN - Outbreak of Extensively Drug-resistant Pseudomonas aeruginosa Associated with Artificial Tears

The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory about infections with an extensively drug-resistant strain of Verona...

CAHAN - Increase in Pediatric Invasive Group A Streptococcal Infections

The Centers for Disease Control and Prevention (CDC) issued a Health Alert Network (HAN) Health Advisory to notify clinicians and public health authorities of a recent increase in...

CAHAN - Interim Guidance for Clinicians to Prioritize Antiviral Treatment of Influenza in the Setting of Reduced Availability of Oseltamivir

Seasonal influenza activity is high across the United States. The Centers for Disease Control and Prevention (CDC) estimates that in the 2022-2023 season to date, there have been...

CD HEALTH ALERT: Updated Recommendations for the Use of Bivalent COVID-19 Vaccines for Children Down to 6 Months of Age

Last week, the FDA authorized the use of bivalent COVID-19 vaccines for children down to six months of age; the CDC then expanded its recommendations for the use of bivalent COVID...

CAHAN - Reminder to Prescribe COVID-19 Therapeutics to Mitigate Impact of Winter Respiratory Surge

Once an individual is diagnosed with COVID-19, early treatment with COVID-19-specific agents is the only existing strategy to markedly decrease risk of serious illness. There is...

CD HEALTH ALERT: Monkeypox (MPX) in Orange County Updated Guidance on Exposures

On November 17, 2022, the CDC released Health Update, Managing Monkeypox in Patients Receiving Therapeutics . While cases rates have declined, new cases continue to be identified...

CD HEALTH ALERT: Increasing Influenza and Respiratory Syncytial Virus Disease in Orange County and the Potential “Tripledemic”

In the last several weeks, OCHCA has continued see a rise in influenza cases in the county that is early and steep and suggests that our county will experience a severe influenza...

CD HEALTH ALERT: Risk of Nontuberculous Mycobacteria Infections Associated with Contamination of Dental Waterlines

The Centers for Disease Control and Prevention (CDC) released a Health Advisory (HAN) linked here about a number of outbreaks of nontuberculous Mycobacteria (NTM) among children...

CD HEALTH ALERT: Avian Influenza (AI) In Orange County

Avian influenza A(H5N1) has been identified in United States wild birds, commercial poultry, and backyard flocks since January 2022. Recently, the first confirmed cases of H5N1...

CD HEALTH ALERT: Increasing Influenza and Respiratory Syncytial Virus (RSV) Disease in Orange County

Influenza virus and respiratory syncytial virus (RSV) disease have been increasing in Orange County for the last several weeks. Compared to pre-pandemic epidemiology this is an...

CAHAN - Outbreak of Ebola virus disease (Sudan ebolavirus) in Central Uganda

The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory about a recently confirmed outbreak of Ebola virus disease (EVD) in...

CAHAN - Early Respiratory Syncytial Virus Activity and Use of Palivizumab

The Health Advisory below discusses an early increase in respiratory syncytial virus (RSV) activity in California. Providers are advised to consider testing for additional...
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News Archive

California Code of Regulations, Title 17, Section 2500, mandates that certain communicable and non-communicable diseases/conditions be reported to the local health department using specified methods and time frames. The List of Mandated Reportable Diseases in Orange County, which summarizes disease reporting requirements for providers, may be downloaded from this website and freely copied. In addition, clinical laboratories serving California residents are mandated to report specific clinical positive results according to the List of Laboratory Reportable Diseases.