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Dengue surveillance in Florida, 1997-98.

J Gill1, L M Stark, G G Clark

  • 1Florida Departmnt of Health, Bureau of Laboratories and University of South Florida, Tampa, Florida, USA. Julia_Gill2@doh.state.fl.us

Emerging Infectious Diseases
|February 1, 2000
PubMed
Summary

Florida faces increased dengue risk due to imported cases. Active surveillance found 18 dengue infections, all serotypes, highlighting a higher import rate than previously known.

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Area of Science:

  • Medical Entomology
  • Infectious Diseases
  • Public Health

Background:

  • Dengue outbreaks are occurring in nearby regions like the Caribbean and Central/South America.
  • Florida has mosquito vectors capable of transmitting dengue.
  • Previous surveillance methods may underestimate dengue importation into Florida.

Purpose of the Study:

  • To assess the rate of dengue importation into Florida.
  • To evaluate the risk of local dengue transmission in Florida.

Main Methods:

  • A laboratory-based active surveillance program was conducted from April 1997 to March 1998.
  • Case identification involved laboratory confirmation of dengue virus infections.
  • Patient travel history was collected to identify potential sources of infection.

Main Results:

  • Eighteen cases of dengue were detected during the surveillance period.
  • All four dengue serotypes were identified among the detected cases.
  • All patients reported recent travel to dengue-endemic countries.

Conclusions:

  • Dengue infections are imported into Florida at a significantly higher rate than previously estimated by passive surveillance.
  • The findings suggest an increasing risk for autochthonous (local) dengue transmission in Florida.

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