Impregnated netting slows infestation by Triatoma infestans

Michael Z. Levy, Victor R. Quíspe-Machaca, Jose L. Ylla-Velasquez, Lance A. Waller, Jean M. Richards, Bruno Rath, Katty Borrini-Mayori, Juan G. Cornejo Del Carpio, Eleazar Cordova-Benzaquen, F. Ellis McKenzie, Robert A. Wirtz, James H. Maguire, Robert H. Gilman, Caryn Bern

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


We used sentinel animal enclosures to measure the rate of infestation by the Chagas disease vector, Triatoma infestans, 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; P < 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, Trypanosoma cruzi. 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 T. infestans and is a potentially valuable tool in the control of Chagas disease.

Original languageEnglish (US)
Pages (from-to)528-534
Number of pages7
JournalAmerican Journal of Tropical Medicine and Hygiene
Issue number4
StatePublished - Oct 2008

ASJC Scopus subject areas

  • Parasitology
  • Virology
  • Infectious Diseases


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