Courtesy Dallas County Health and Human Services
In a news conference held earlier today, officials with Dallas County Health and Human Services (DCHHS) announced plans to monitor mosquito activity and control the spread of West Nile virus during the 2008 mosquito season. Mosquito season in Dallas County typically runs from May to October with peak activity in August. Partnership and public education are critical components of DCHHS’ efforts.
“We met with our municipal partners in March to review historical data, and refine the reporting process and mitigation efforts for the upcoming year,” said Anthony Jenkins, DCHHS Assistant Director of Environmental Health. “The cornerstone to all mosquito-borne diseases control is mosquito surveillance. Our goal is early detection of mosquito infections so we may implement control measures sooner in order to prevent and reduce the number of human cases. We’ve been tracking West Nile Virus for the past six years, and we are beginning to see a pattern of behavior in the mosquito population related to weather patterns and other factors. We have used this data to refine our monitoring and detection systems so that we are now able to identify infected mosquito pools in advance of seeing human cases,” Jenkins continued.
Armed with this knowledge, DCHHS is expanding its public education efforts to inform the public about the dangers of West Nile virus and to educate them on ways to protect themselves and their families. “DCHHS is starting early again this year to get the word out about ways individuals can protect themselves against West Nile virus,” DCHHS Director Zachary Thompson said. DCHHS has identified zip codes with the highest frequency of human cases of West Nile virus from the period of 2002-2007. Staff has taken this information to classify the top 5 hot spots for West Nile human cases in Dallas County in order to focus their pre-season marketing messaging. (see attached)
“Through our public education and marketing campaign we will continue to reach out to areas schools, colleges, universities, day care centers, parks, recreation centers and libraries across the county. In addition, we are contacting neighborhood associations and outdoor recreation venues such as lakes, hike and bike trails, and other outdoor venues within our hot spot zip codes where people congregate and play to encourage people to take a prevent defense in the fight against West Nile.”
DCHHS produces and distribute a weekly publication, the West Nile Watch, which contains information on the locations of infected mosquito pools and mitigation efforts in the county. The public can receive a copy by sending an email request to westnile@dallascounty.org. The publication will also be available for downloading from the DCHHS website at www.dallascounty.org. The website also contains public education materials such as brochures, flyers, posters and kid-friendly coloring sheets that are available to the public.
In addition to the pre-season efforts, DCHHS is working with its municipal partners to localize and intensify the public education efforts. “Once we identify an infected mosquito pool in an area, we will work with our municipal partners to push out public education materials to the area in order to forestall human cases,” Thompson concluded.
DCHHS works with its municipal partners on strategies to protect Dallas County residents from mosquito-borne illnesses. DCHHS West Nile prevention activities include surveillance, source reduction, larvaciding (killing mosquito larvae or wigglers), adulticiding (spraying for adult mosquitoes), and public education. DCHHS uses gravid traps to collect mosquitoes for early detection of West Nile Virus and GPS units to record trap locations. This equipment has greatly enhanced mosquito surveillance throughout the county.
“The most effective way to reduce any mosquito-borne disease like West Nile is prevention,” said Dr. John Carlo, DCHHS Medical Director. “The best way to avoid West Nile infection is to avoid mosquito bites by using insect repellent and wearing long, loose-fitting, light-colored clothing when outside at dusk and dawn.”
Studies have shown that the majority of people who contracted the more serious form of West Nile virus did not use insect repellent. In 2007, Dallas County reported 23 confirmed human cases of West Nile virus with no deaths. In 2006, Dallas County reported 106 confirmed human cases of West Nile virus and four deaths. In 2005, Dallas County had 43 confirmed human cases of West Nile with one death. In 2004, DCHHS reported a total of 16 human West Nile cases with no deaths. In 2003, Dallas County had a total of 54 human West Nile cases with 4 deaths. In 2002, the first year the virus was reported in Dallas County, there were 27 human cases with 3 deaths. As in previous years, public education and personal protection is vital in protecting the public from the disease. For more information about mosquito activities in Dallas County, call the DCHHS Environmental Health Division at 214-819-2115 or visit www.dallascounty.org.