Volume 79, Issue 4
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


We used sentinel animal enclosures to measure the rate of infestation by the Chagas disease vector, , in an urban community of Arequipa, Peru, and to evaluate the effect of deltamethrin-impregnated netting on that rate. Impregnated netting decreased the rate of infestation of sentinel enclosures (rate ratio, 0.23; 95% confidence interval, 0.13–0.38; < 0.001), controlling for the density of surrounding vector populations and the distance of these to the sentinel enclosures. Most migrant insects were early-stage nymphs, which are less likely to carry the parasitic agent of Chagas disease, . Spread of the vector in the city therefore likely precedes spread of the parasite. Netting was particularly effective against adult insects and late-stage nymphs; taking into account population structure, netting decreased the reproductive value of migrant populations from 443.6 to 40.5. Impregnated netting can slow the spread of and is a potentially valuable tool in the control of Chagas disease.


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  • Received : 11 Mar 2008
  • Accepted : 30 Jun 2008

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