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.

Adobe Reader

Note: PDF documents on this site were created using Adobe Acrobat 5.0 or later. If you are using an earlier version of Adobe Acrobat Reader (4.x or less), document functionality may be reduced.
Acute Communicable Disease Control
(Back to Zika main page)
Zika Virus Testing
Please Note:
CDC released updated testing recommendations for Zika in November 2019. Routine serological testing for Zika is no longer recommended even for symptomatic persons. For symptomatic pregnant women living in or with recent travel to a Zika risk area with active dengue transmission, nucleic acid testing for Zika and dengue is recommended with IgM testing for dengue only. These recommendations are due to the major decline of Zika cases globally. Antibodies generated by a recent dengue infection can cause Zika IgM to be falsely positive. Testing guidelines may continue to be updated and can be accessed on the CDC's Zika information for health care providers webpage here.

Zika testing by PCR is available at commercial laboratories and can be ordered using regular clinical testing protocols. The Los Angeles County Public Health Laboratory (PHL) conducts confirmatory Zika virus testing as needed.


The PHL offers access to all recommended screening and confirmatory testing for Zika and related arboviral infections. Some of this testing is sent to the California State laboratory and/or CDC.

For specimen collection and transport consultation contact LAC DPH Public Health Laboratories:
562-658-1300 (during business hours)
213-974-1234 (after hours or holidays)

The Los Angeles County Zika Virus Testing and Report Form  must be completed for specimens to be processed. Failure to complete required fields on the requisition forms will result in specimen rejection or delayed testing. The form includes a two-page reporting and test requisition form as well as the specimen requirements and submission instructions found below. A separate test requisition form must be submitted for each specimen type. The Zika Virus Testing and Report Form available here.

Specimen Requirements for Zika Testing
Note: requested sample volumes are for adults.
Specimen Requirements for Zika Testing

* Specimens must be received within 24 hours of collection.
**Do not use glass vacutainer tube for blood collection. Do not use tubes that contain anti-coagulants.
***To optimize evaluation of possible Zika virus infection on fetal tissues, please provide both formalin-fixed and unfixed tissues. If it is not possible to provide both types of tissues, prioritize formalin-fixed tissues. For additional information regarding collection of fetal or infant tissues, please contact the Public Health Laboratories for guidance.

Instructions for Test Requests
Samples submitted with incomplete intake information, incomplete patient history, incomplete or discrepant patient sample identifiers and labeling information, or incomplete test request forms will not be tested.

Provider may be required to complete additional forms for receiving results by fax if not currently a client of the Los Angeles County PHL.

Convalescent serum or an additional serum sample may be requested depending on laboratory results.

  1. Download and complete the required information for Zika Virus Test Request Form. Separate testing forms (both pages 1 and 2) must accompany each specimen type.
  2. The following information must be included on the form:
    1. Facility/Submitter name, address, phone, and fax
    2. Requesting provider name (Last, First) and contact information to enable reporting of results
    3. Patient name or unique patient identifier
    4. Patient sex
    5. Patient date of birth
    6. Test(s) to be performed
    7. Specimen source
    8. Date and time of specimen collection
  3. If the patient or provider are unable to obtain phlebotomy services, contact the Los Angeles Acute Communicable Disease Control Program (ACDC) for assistance, approval, and referral to a Los Angeles County Public Health Clinic.
  4. Specimens must be labeled with the following information:
    1. Patient name (Last, First)
    2. Date of Birth
    3. Collection Date and Collection Time
Specimen Processing and Packaging
Proper storage and transport conditions preserve analyte integrity within the sample. Leaking specimens will also be rejected:
  • Clinics able to process specimens may centrifuge blood and transfer serum to a separate, sterile, labeled tube
  • Samples must be sent to the Los Angeles County PHL as soon as possible and within 24 hours of collection
  • Each specimen type must come with its own test request form
  • Each specimen must be packaged using individual biohazard specimen transport bags

Specimen Transport
Laboratory samples for Zika testing should not be sent directly to the California State Department of Public Health or the Centers for Disease Control.

Send samples to the Los Angeles County Public Health Laboratories (PHL) as soon as possible and within 24 hours of collection.

Los Angeles County Public Health Laboratories
12750 Erickson Avenue
Downey, CA 90242
Phone 562-658-1300
Fax 562-401-5999

Specimen transport conditions must be followed or sample will be rejected.

If a provider does not have access to courier services, PHL will help to arrange for sample pick up. Courier arrangements can be made by calling PHL Central Accessioning Unit at 562-658-1460.

Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.
Los Angeles County Seal: Enriching lives through effective and caring services