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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 101, No. 2, 2006, pp. 175-193
Bioline Code: oc06033
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 101, No. 2, 2006, pp. 175-193

 en Phlebotomines (Diptera: Psychodidae) in forested areas of the Serra da Bodoquena, state of Mato Grosso do Sul, Brazil
Eunice AB Galati; Vânia LB Nunes; Paulo C Boggiani; Maria Elizabeth C Dorval; Geucira Cristaldo; Hilda C Rocha; Elisa T Oshiro & Geraldo A Damasceno-Júnior

Abstract

Investigation was undertaken on the behaviour of the phlebotomine fauna in caves, forests, and anthropic environments of the Serra da Bodoquena, between January 1998 and January 2000. This paper reports on the phlebotomines captured in forested areas with automatic light traps (ALT), Shannon traps (ST), aspiration (AN), at natural resting sites and by human attractiveness (HA) during 24 h. The diversity and abundance of the species were investigated with ALT installed at 16 points (ground level) and 6 in the canopy. Natural infection by flagellates was investigated in females captured with ST, AN, and HA. The sand fly fauna was represented by 23 species. Twenty-two of these were captured with ALT, 15 of them on the western side, and 20 on the eastern. Lutzomyia longipalpis check for this species in other resources and Nyssomyia whitmani check for this species in other resources were the most abundant on the former and this species together with Lutzomyia almerioi check for this species in other resources on the latter side. On the eastern side the ecotopes located close to caves rendered a significantly greater number (P ≤ 0.01) of specimens than did more distant sites. On this side Lu. almerioi contributed with 56% of the total number of specimens. Lu. almerioi females were predominantly attracted by humans (96.4%) and by ST (93.2%) and three of the 2173 dissected (0.138%) presented natural infection by flagellates. The attraction of Lu. almerioi to humans occurred during all seasons, predominantly in the summer, and in nocturnal and diurnal periods. Thus it is bothersome to inhabitants of and visitors to the Bodoquena ridge and a potential vector of flagellates.

Keywords
ecology - nictemeral rhythm - human attractiveness - vectors - leishmaniasis - Lutzomyia almerioi

 
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