DHSS Press Release

CDC IDENTIFIES ANTI-VIRAL RESISTANT H1N1 IN DELAWARE

Delaware's Division of Public Health was notified Dec. 4 that routine testing by the Centers for Disease Control and Prevention (CDC) identified an occurrence of anti-viral resistant H1N1 influenza in Delaware. The sample was identified by the CDC in a laboratory sample taken from a 52-year-old Kent County resident who died on Nov. 7 following hospitalization. As previously reported, the man had multiple underlying health conditions which would have made his fight against H1N1 difficult regardless of the resistance. Oseltamivir (Tamiflu) is one of several anti-viral medications used to treat influenza. According to the CDC, less than 1 percent of H1N1 influenza samples nationwide are found to be oseltamivir-resistant.

To assist in disease surveillance, all states are asked to provide the CDC with randomly-selected samples for sub-typing to determine strains and susceptibility testing. Of 115 specimens from Delaware that the CDC tested, this was the only sample to demonstrate oseltamivir-resistance. CDC has tested a total of 1,540 specimens nationwide, with 15 found resistant.

"Given the rarity of antiviral resistance, increased testing is not recommended by the CDC at this time," said Dr. Karyl Rattay, DPH director. "DPH will continue to provide random samples for CDC surveillance testing."

While H1N1 influenza activity continues to decrease in Delaware, cases continue to occur. Individuals in priority groups are still encouraged to receive vaccination to protect themselves and loved ones.

For additional information about both H1N1 and seasonal vaccines, please see our website at www.flu.delaware.gov

Delaware Health and Social Services is committed to improving the quality of the lives of Delaware's citizens by promoting health and well-being, fostering self-sufficiency, and protecting vulnerable populations.