%0 Journal Article %T Leptospirosis Prevalence in Patients with Initial Diagnosis of Dengue %A A. Dircio Montes Sergio %A E. Gonz芍lez Figueroa %A Verdalet Guzm芍n Mar赤a Saadia %A Soler Huerta Elizabeth %A Rivas S芍nchez Beatriz %A M. Altuzar Aguilar V赤ctor %A J. Navarrete Espinosa %J Journal of Tropical Medicine %D 2012 %I Hindawi Publishing Corporation %R 10.1155/2012/519701 %X Objective. To determine the prevalence of leptospirosis in patients from Veracruz with initial diagnosis of dengue and its association with risk factors. Materials and Methods. Transversal study in patients who sought medical attention under the suspicion of dengue. Backgrounds were researched and blood samples were drawn to determine dengue (NS1, RT-PCR) and leptospirosis (IFI). Simple frequencies, central tendency and dispersion measures, and prevalence and trust intervals at 95% (IC95%) were obtained. Prevalence reasons (RP) and IC95% were obtained and a multivariate logistic model was applied, using SPSSˋV15. Results. 171 patients were included, 56% women ( 3 2 ㊣ 1 4 years) and 44% men ( 3 2 ㊣ 1 7 years). 48% of the cases (IC95%ˋ40.5每55.4) was positive to dengue, with a cut point of 1ˋ:ˋ80, seroprevalence for leptospirosis was of 6% (IC95%ˋ2.7每10); 12% (IC95%ˋ7每16.5) was positive to both pathologies and 34% was negative to both tests. Although the largest number of isolations corresponded to serotype 2, the four dengue virus serotypes were identified. In the bivariate analysis, overcrowding RPˋ=ˋ1.33, (ICˋ=ˋ0.46每3.5), bathing in rivers (RPˋ=ˋ1.31, ICˋ=ˋ0.13每7.4), and walking barefoot (RPˋ=ˋ1.39, ICˋ=ˋ0.58每3.3) were the variables associated with leptospirosis, although the relation was not statistically significant. Conclusions. Leptospirosis prevalence in subjects under suspicion of dengue fever is high, as well as the coincidence of both infections. The results show the coexistence of overlapped outbreaks of several diseases sharing the side of transmission. It is necessary the intentional search of other pathologies, such as influenza, rickettsiosis, and brucella, among others. 1. Introduction Dengue is a viral disease caused by any of the known dengue viruses (Den1每Den4), and it is transmitted by the bite of a previously infected female Aedes aegypti mosquito. Literature describes several presentations of the disease, which go from asymptomatic to undifferentiated forms, dengue fever, hemorrhagic dengue fever [1每3]. Currently there exists a clinical classification of the disease that considers the nonsevere dengue and severe dengue [4]. During the last decades, the number of cases of dengue has notably increased, as well as the countries affected worldwide [5, 6]. In America, the dissemination and permanence of the vector, as well as the circulation of the four serotypes, have favored conditions of extensive and repeated exposure to the population, which has been reflected in an increase of hemorrhagic forms [7每9]. In Mexico, this pathology has %U http://www.hindawi.com/journals/jtm/2012/519701/