Vázquez-Castellanos JL, Canales-Muñoz JL, Nápoles-Camacho MA, Castillo-Morán MA, Ureña- Carrillo LE

Language: Spanish
References: 16
Page: 8-19
PDF size: 441.19 Kb.

ABSTRACT

Bakcground: On October 1988, the Directorate of Epidemiology, was notifi ed of an outbreak of suspected dengue in the eastern area of Guadalajara, the second largest city in Mexico with approximately 3 million inhabitants. Th is city is located at an altitude of 1500 meters, and had no previous history of dengue transmission. Objective: Characterize the outbreak in place and person as well as know the magnitude and the most aff ected areas. Methods: A population survey was carried out based on a twostage cluster sampling in which 30 clusters of the sector considered at risk were randomly selected. Additionally, the search and identifi cation of breeding sites in the homes visited was carried out. Results: Th ree hundred and thirty seven houses were surveyed with a population of 1959 people, of which 142 were considered cases of dengue according to an operational defi nition. (Attack Rate 7.2%, 95% CI 6.66, 7.83). Laboratory confi rmation was achieved in 64 of the cases. Dengue serotype 1 was isolated in nine cases. Th e larval index for A aegypti of the most aff ected area was 45%. Th e main breedings found were pools (54.2%), tambos (26.1%) and bottles (26.1%). Th ese recipients presented larval positivity of 8.7, 6.5 and 7.7 per cent respectively. Of these containers 8.7, 6.5 and 7.7 per cent were positive for Aedes aegypti. Conclusions: Th is is the fi rst recognized and documented outbreak in Guadalajara. It could be estimated that between 17,080 and 23,520 cases occurred in the epidemic period, most of them not reported. Th e implementation of control measures and follow-up of the outbreak prevented it from spreading to other areas and reaching greater proportions. A rapid control of the epidemic was achieved through the intensive application of insecticide, larvicide, removal of incidental water containers and information through the mass-media.

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