Three Florida counties declared states of emergency by Sept. 23 due to an outbreak of locally acquired dengue fever, according to local news releases. Pasco, Hillsborough, and Pinellas counties issued the emergency declarations to expedite mosquito-control operations, make emergency purchases, and coordinate response efforts against the mosquito-borne viral illness.
Emergency Declarations and Local Response Efforts
Under Florida law, local emergency declarations expire after seven days unless they are renewed. These emergency orders allow county officials to make emergency purchases and seek state or federal assistance or reimbursement for mosquito-control operations. The Florida Mosquito Control Association (FMCA) indicated earlier that ground and aerial treatments are being expanded in regions where the dengue virus is active, alongside inspections of private properties for locations where mosquitoes might breed.
Geographic Distribution of Dengue Cases in Florida
State health surveillance data covering cases with onset through Sept. 19 confirmed a total of 190 locally acquired dengue infections across six Florida counties. Hillsborough County accounts for the vast majority of these infections with 170 reported cases. Miami-Dade and Pinellas counties each recorded seven locally acquired cases, Orange County reported three, Pasco County registered two, and Palm Beach County recorded one. State health officials noted these 190 locally acquired cases are separate from travel-associated dengue cases reported in Florida this year.
Transmission Dynamics and Prevention Guidelines
Dengue spreads primarily through the bites of infected Aedes mosquitoes, which thrive in warm, humid climates and remain active during the day. A spokesperson for the SC Johnson Center for Insect Science and Family Health, who is an entomologist, noted that it is particularly vital to take precautions against mosquito bites as reports of dengue persist in the Tampa region. The FMCA and insect control experts recommend several specific steps to reduce exposure risks:
- Use EPA-registered insect repellents following product label directions.
- Eliminate sources of standing water around homes, as mosquitoes need only one tablespoon of water to breed in items like birdbaths, rain gutters, or buckets.
- Apply sunscreen first, followed by insect repellent, when using both products.
- Dress in long sleeves, light colors, and closed-toed shoes outdoors.
Clinical Symptoms and Warning Signs of Severe Illness
Many people infected with the dengue virus have no symptoms, while most people who do become sick recover within a week or two, according to Mayo Clinic. Symptom onset typically occurs four to 10 days following the bite of an infected mosquito. In rare cases, the illness progresses to severe dengue, a potentially life-threatening condition characterized by warning signs that often develop quickly, within a day or two after the fever subsides. Critical indicators requiring immediate medical care include severe stomach pain, repeated vomiting, unusual bleeding or bruising, difficulty breathing, and extreme tiredness, irritability, or restlessness.
Frequently Asked Questions About the Florida Dengue Outbreak
Which Florida counties have declared a state of emergency for dengue?
Pasco, Hillsborough, and Pinellas counties declared states of emergency by Sept. 23 to manage the spread of the mosquito-borne disease.
How many locally acquired dengue cases has Florida confirmed?
The Florida Department of Health surveillance report covering cases with onset through Sept. 19 confirmed 190 locally acquired infections across six counties.
What type of mosquito transmits the dengue virus?
Aedes mosquitoes transmit the virus and are active during the day in warm, humid environments.
What are the primary warning signs of severe dengue?
Warning signs include severe stomach pain, repeated vomiting, unusual bleeding or bruising, difficulty breathing, and extreme tiredness, irritability, or restlessness, typically appearing shortly after a fever subsides.