Volume 81, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


To determine the effect of peridomestic environments on infestation in urban premises, we conducted two consecutive surveys in the hot-dry and cool-wet seasons. Most pupae (79%) were recovered from premises where preadult forms (larvae and/or pupae) had been detected in both surveys. Hence, repeated infestation appears to be a useful parameter to identify premises associated with a high potential risk of dengue transmission. Multivariate analysis revealed that not only the persistent presence of containers discarded outdoors, wells, large plastic buckets, jars, and concrete toilet basins in the premises (adjusted odds ratios [aORs] = 63.3, 23.3, 22.5, 6.6, and 5.6, respectively) but also the presence of six or more residents was significantly associated with repeated infestation (aOR = 6.1). Premises with six or more residents along with specific container types from which a large number of pupae were recovered should be targeted in dengue-control programs.


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  • Received : 08 Apr 2008
  • Accepted : 28 Jun 2009

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