The role of inter-regional flows in the spread of epidemics in a city of regional influence with a tropical climate

Maria Aparecida de Oliveira, Marta Inenami, Rosangela Maria Gasparetto da Silva, Carlos Castillo-Salgado, Helena Ribeiro

Research output: Contribution to journalArticle

Abstract

The aim of this research was to investigate the origin of imported cases of dengue in the city of Araraquara, Brazil and to describe the disease's main epidemiological characteristics. The study encompassed all confirmed cases of dengue recorded in the Information System for Notifiable Diseases (SINAN) [Sistema de Informação de Agravos de Notificação] from 1998 to 2013. Cases whose origin of infection was likely located outside Araraquara were considered imported. The epidemiological study entailed a descriptive analysis of the data, regarding the distribution of cases by sex, age, and classification of imported and autochthonous cases. A geographic information system was used to map flows and estimate distances. There were 6,913 confirmed cases, 419 of which were imported. In most cases, the origin of infection was located in the state of São Paulo as well as other Brazilian regions. The results indicate the relevance of imported cases and differences in the epidemiological profile with respect to age and sex. Conclusions indicate the need to increase epidemiological and environmental health surveillance at ports, airports, truck stops, and bus and train terminals.

Original languageEnglish (US)
Pages (from-to)109-119
Number of pages11
JournalSalud Colectiva
Volume14
Issue number1
DOIs
StatePublished - Jan 1 2018

Keywords

  • Brazil
  • Dengue
  • Epidemiological surveillance
  • Geographic information systems
  • Spatial analysis

ASJC Scopus subject areas

  • Health Policy
  • Public Health, Environmental and Occupational Health

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