Luz e galinhas como fatores de atração de Nyssomyia whitmani em ambiente rural, Paraná, Brasil

Abstract

Light and hens as attraction factors of Nyssomyia whitmani in a rural area, Southern Brazil ABSTRACT OBJECTIVE: To verify the infl uence of traps with electric light and hens as factors that attract sandfl ies and compare results between capture methods. METHODS:The study was conducted in the Palmital Farm, Southern Brazil. Sandfl y collections were conducted with Falcão traps and an electric aspirator, fortnightly, between 8 p.m. and 11 p.m. in the presence or absence of light and hens in peridomiciliary areas, from September 1998 to June 1999. RESULTS:A total of 43,767 specimens from eight species of sandfl ies were collected: Nyssomyia whitmani, N. neivai and Migonemyia migonei constituting 99.9% of the total collected, with predominance of N. whitmani. The number of this species collected inside the hen's shed in the presence of hens (21,045) was greater than in their absence (10,434). In the presence of hens, with distinct intensities of light, a larger number of N. whitmani samples were collected with 3W light. In the presence of hens and light (3W), the number of N. whitmani collected with the electric aspirator (5,141) was superior to that collected with the Falcão trap (1,675). In the absence of light, with or without the presence hens, there was no difference between the numbers of N. whitmani collected with the electric aspirator or the Falcão trap. CONCLUSIONS:Hens and electric light together attract more N. whitmani to peridomicilary areas. The number of N. whitmani collected with an electric aspirator inside a hen's shed with the presence of hens and light is greater than those collected with a Falcão trap in the same conditions.

Monthly Distribution of Phlebotomine Sand Flies, and Biotic and Abiotic Factors Related to Their Abundance, in an Urban Area to Which Visceral Leishmaniasis Is Endemic in Corumbá, Brazil

“…The published literature also shows that chickens attract sand flies [43–46]. Chicken coops and pigpens are recognized as resting places for adults of both sexes, where females also take their blood meals.…”

“…Further, these ecotopes provide shade, moisture and soil with organic matter providing suitable conditions for breeding sites of the immature flies [47–49]. Teodoro et al [46] showed that twice the number of sand flies (testing 8 species) could be captured in environments containing chickens compared to those without. Ximenes et al [50] showed that the presence of domesticated animals and low cleanliness of local conditions help maintain high population densities of sand flies.…”

Biotic factors and occurrence of Lutzomyia longipalpis in endemic area of visceral leishmaniasis, Mato Grosso do Sul, Brazil

“…When working with eight different species of these flies, Teodoro et al (2007) captured twice as many individuals in the presence of chickens. According to Ximenes et al (1999), the presence of domestic animals associated with poor cleaning conditions contributes to the maintenance of high abundance of Lu.…”

Memória espacial e/ou olfativa em flebotomíneos em área endêmica de leishmaniose tegumentar americana, sul do Brasil

“…Os mesmos autores 12 sugeriram que possivelmente esses insetos sejam capazes de lembrar dos locais de agregação. Embora se saiba que flebotomíneos de ambos os sexos sejam atraídos pela luz 26 , pode-se inferir com base nas observações de gibson e Torr 9 que este estímulo tem importância secundária para a localização do hospedeiro, devido à baixa percepção visual dos dípteros hematófagos.…”