Evaluation of deltamethrin-impregnated bednets and curtains against phlebotomine sandflies in Valle del Cauca, Colombia.

B. Alexander, M. C. Usma, H. Cadena, B. L. Quesada, Y. Solarte, W. Roa, Bruno Travi

Research output: Contribution to journalArticle

52 Citations (Scopus)

Abstract

The effectiveness of bednets and curtains (nylon mesh 64 per cm2) impregnated with deltamethrin at 26 mg a.i./m2 in reducing the biting nuisance caused by three phlebotomine sandfly species: Lutzomyia columbiana, Lu.lichyi and the predominant Lu.youngi (Diptera: Psychodidae), was evaluated at La Guaira, a rural settlement in Valle de Cauca near Cali, Colombia. Pairs of volunteers collected sandflies under impregnated bednets, in rooms protected by impregnated curtains or in unprotected rooms in a randomized matched design. Collections were made in three houses per night on three consecutive nights, so that each house was sampled under each of the three treatments. This routine was repeated at 2-week intervals for 6 months. There was no significant difference between the overall numbers of sandflies collected in rooms with or without impregnated curtains. Only 0.14 sandflies/man-hour were caught on human bait under impregnated bednets, significantly fewer than the numbers collected on human bait outside the nets in the same room (1.91) or in unprotected rooms (3.29). In a second set of experiments carried out in La Guaira and the neighbouring community of Jiguales, the effect of deltamethrin impregnation was evaluated by comparing numbers of sandflies collected on human bait under treated and untreated nets. Significantly fewer were collected under the impregnated nets (0.25 v. 0.69/man-hour). Wild-caught female Lu.youngi exposed to treated netting for 2 min in the laboratory all died with 24 h. The impact of deltamethrin-impregnated bednets was considered to be useful against Lu.youngi and other potential vectors of leishmaniasis in such communities.

Original languageEnglish (US)
Pages (from-to)279-283
Number of pages5
JournalMedical and Veterinary Entomology
Volume9
Issue number3
StatePublished - Jul 1995
Externally publishedYes

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impregnated bednet
deltamethrin
Psychodidae
Colombia
Phlebotominae
bait
baits
leishmaniasis
Lutzomyia
netting
nylon
Leishmaniasis
Nylons
volunteers
evaluation
decamethrin
Diptera
experiment
Volunteers

ASJC Scopus subject areas

  • Insect Science
  • veterinary(all)

Cite this

Evaluation of deltamethrin-impregnated bednets and curtains against phlebotomine sandflies in Valle del Cauca, Colombia. / Alexander, B.; Usma, M. C.; Cadena, H.; Quesada, B. L.; Solarte, Y.; Roa, W.; Travi, Bruno.

In: Medical and Veterinary Entomology, Vol. 9, No. 3, 07.1995, p. 279-283.

Research output: Contribution to journalArticle

Alexander, B. ; Usma, M. C. ; Cadena, H. ; Quesada, B. L. ; Solarte, Y. ; Roa, W. ; Travi, Bruno. / Evaluation of deltamethrin-impregnated bednets and curtains against phlebotomine sandflies in Valle del Cauca, Colombia. In: Medical and Veterinary Entomology. 1995 ; Vol. 9, No. 3. pp. 279-283.
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