title: Dengue fever seroprevalence and risk factors, Texas-Mexico border, 2004.
abstract: Reported autochthonous dengue fever transmission in the United States has been limited to 5 south Texas border counties since 1980. We conducted a cross-sectional serosurvey in Brownsville, Texas, and Matamoros, Tamaulipas, Mexico (n = 600), in 2004 to assess dengue seroprevalence. Recent dengue infection was detected in 2% (95% confidence interval [CI] 0.5%-3.5%) and 7.3% (95% CI 4.3%-10.3%) of residents in Brownsville and Matamoros, respectively. Past infection was detected in 40% (95% CI 34%-45%) of Brownsville residents and 78% (95% CI 74%-83%) of Matamoros residents. For recent infection, only weekly family income <or=$100 was a significant predictor (adjusted odds ratio 3.2, 95% CI 1.3-8.0). Risk factors that predicted past dengue infection were presence of larval habitat, absence of air-conditioning and street drainage, and weekly family income <or=$100. Mosquito larvae were present in 30% of households in both cities. Our results show that dengue fever is endemic in this area of the southern Texas-Mexico border.
authors.affiliation: University of California, Santa Cruz, California, USA. jbrunkard@cdc.gov
authors.forename: Joan Marie
authors.initials: JM
authors.lastname: Brunkard
authors.forename: Jose Luis
authors.initials: JL
authors.lastname: Robles López
authors.forename: Josue
authors.initials: J
authors.lastname: Ramirez
authors.forename: Enrique
authors.initials: E
authors.lastname: Cifuentes
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Rothenberg
authors.forename: Elizabeth A
authors.initials: EA
authors.lastname: Hunsperger
authors.forename: Chester G
authors.initials: CG
authors.lastname: Moore
authors.forename: Regina M
authors.initials: RM
authors.lastname: Brussolo
authors.forename: Norma A
authors.initials: NA
authors.lastname: Villarreal
authors.forename: Brent M
authors.initials: BM
authors.lastname: Haddad
mesh_terms: D000293:Adolescent; D000328:Adult; D000330:Aedes; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D002980:Climate; D003430:Cross-Sectional Studies; D003715:Dengue / Q000453:epidemiology*; D017753:Ecosystem; D006801:Humans; D008800:Mexico / Q000453:epidemiology; D008875:Middle Aged; D012307:Risk Factors; D016036:Seroepidemiologic Studies; D012923:Social Class; D013781:Texas / Q000453:epidemiology