Bionomics of Lutzomyia evansi (Diptera: Psychodidae) Vector of Visceral Leishmaniasis in Northern Colombia

Bruno L. Travi, James Montoya, Jorge Gallego, Consuelo Jaramillo, Rubiela Llano, Ivan D. Velez

Research output: Contribution to journalArticle

48 Scopus citations

Abstract

The feeding behavior, seasonality, and natural infection rate of Lutzomyia evansi (Nuñez-Tovar) with Leishmania chagasi (Cuna & Chagas) was studied during a 12-mo period at 2 hamlets, El Contento and Vidales. Sand fly abundance in extra-, peri-, and intradomestic habitats was evaluated with sticky traps and CDC light traps, whereas human bait and Shannon trap collections were made only in peridomestic habitats. All trapping methods showed a clear predominance of L. evansi throughout the year. Sand flies were present during most of the year, with the exception of the driest months (February and March). Although the total number of sand flies was higher in El Contento than in Vidales, a larger proportion of L. evansi was found in intradomestic habitat than in the peri- and extradomestic habitats at Vidales. Also, sand flies from Vidales had a higher infection rate with L. chagasi than did those from El Contento. Although 2 of 9 promastigote infections detected in L. evansi were identified as L. chagasi, the difficulty of isolating and propagating Leifshmania strains from this visceral leishmaniasis focus precluded characterization of most parasite samples. Parous and infected sand flies were most abundant toward the end of the rainy season (October-December). For this reason, control strategies based on reducing sand fly populations or avoiding human-vector contact should be concentrated during the October-December period.

Original languageEnglish (US)
Pages (from-to)278-285
Number of pages8
JournalJournal of medical entomology
Volume33
Issue number3
DOIs
StatePublished - May 1996
Externally publishedYes

Keywords

  • Colombia
  • Lutzomyia evansi
  • Sand fly bionomics
  • Visceral leishmaniasis

ASJC Scopus subject areas

  • Parasitology
  • veterinary(all)
  • Insect Science
  • Infectious Diseases

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