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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 108, No. 4, 2013, pp. 463-469
Bioline Code: oc13079
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 108, No. 4, 2013, pp. 463-469

 en Seasonal variation and natural infection of Lutzomyia antunesi check for this species in other resources (Diptera: Psychodidae: Phlebotominae), an endemic species in the Orinoquia region of Colombia
Trujillo, Adolfo Vásquez; Reina, Angélica E. González; Orjuela, Agustín Góngora; Suárez, Edgar Prieto; Palomares, Jairo Enrique & Alvarez, Luz Stella Buitrago

Abstract

Lutzomyia antunesi check for this species in other resources has been commonly reported in outbreaks of cutaneous leishmaniasis (CL) in the Orinoquia region of Colombia. The bionomics of this species were studied in the municipality of Villavicencio (Meta, Colombia). Sandflies were captured over the course of one week per month for one year in intradomiciliary, peridomiciliary and extradomiciliary housing areas. The captures were performed from 06:00 pm-06:00 am using CDC light traps and the females were processed for polymerase chain reaction (PCR) to detect Leishmania spp. A total of 22,097 specimens and 19 species were captured of which Lu. antunesi (89%) and Lutzomyia walkeri check for this species in other resources (5%) were the most abundant. Other species recognised as anthropophilic ( Lutzomyia panamensis check for this species in other resources , Lutzomyia gomezi check for this species in other resources , Lutzomyia flaviscutellata check for this species in other resources and Lutzomyia fairtigi check for this species in other resources ) were present in very low abundance (< 2%). Natural infection with Leishmania spp was detected using PCR in Lu. antunesi, Lu. panamensis and Lu. flavicutellata, showing infection rates of 1%, 4.8% and 7.5%, respectively. The present paper provides information on various ecological aspects of Lu. antunesi. An analysis of seasonality shows that this species increases in abundance in the hottest months (December, January and February), directly correlating with the maximum temperature and inversely correlating with precipitation. The natural infection rate is associated with the peaks of highest abundance.

Keywords
sandflies; seasonal variation; natural infection; Lutzomyia antunesi; leishmaniasis; Colombia

 
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