Enhanced Zika Disease Surveillance in High-Risk Area
AUSTIN, October 3, 2016 – The Texas Department of State Health Services (DSHS) has long considered the southernmost areas of the state to be at greater risk of supporting local mosquito transmission of Zika virus. This is based upon historical experience with local transmission of dengue virus, which is related to the Zika virus and transmitted by the same type of mosquitoes. Local transmission of dengue is most commonly reported in Texas from August through December.
As testing options and availability have expanded and knowledge of the disease epidemiology has improved, guidance to healthcare providers on appropriate Zika infection testing of patients has evolved. The goals of testing are to diagnose patients and, from a public health perspective, to define the temporal and spatial distribution of the disease burden.
Enhanced Zika Surveillance
DSHS is asking the healthcare community to assist in improving surveillance for locally transmitted Zika disease. Toward that end, DSHS is expanding the testing criteria for those with major signs/symptoms of Zika disease (fever, arthralgia, rash, and conjunctivitis), but who have no travel history to an area of local Zika transmission or sexual exposure to Zika virus:
The current comprehensive guidance on Zika testing can be found at http://texaszika.org/healthcareprof.htm.
Capacity for Zika testing has increased, as it is no longer limited to U.S. Centers for Disease Control and Prevention (CDC) or state public health laboratories. Under Emergency Use Authorizations issued by the Food and Drug Administration, there are now a number of commercial laboratories that offer molecular assays for detection of Zika virus RNA, and some are also offering serology for Zika IgM.
DSHS continues to recommend that healthcare providers consult with their local health department or DSHS Regional Office to facilitate appropriate test selection and submission of specimens.
For More Information
Texas-specific information and links to CDC resources: TexasZika.org