Limits...
Hourly activity and natural infection of sandflies (Diptera: psychodidae) captured from the aphotic zone of a cave, minas gerais state, Brazil.

Carvalho GM, Brazil RP, Saraiva L, Quaresma PF, Botelho HA, Ramos MC, de Almeida Zenóbio AP, e Meira PC, de Castilho Sanguinette C, Filho JD - PLoS ONE (2012)

Bottom Line: In this same study, we have also noticed the presence of flagellates in some captured females.The most abundant species and with more intense period of activity were, in descending order: Lu. cavernicola (62%), Ev. spelunca (16%) and Ev. sallesi (14%).A total of 69 females were dissected to check for natural infection, and in five specimens we found living flagellated forms: two Ev. spelunca, two Ev. sallesi and one Sc. sordellii.

View Article: PubMed Central - PubMed

Affiliation: Grupo de Estudos em Leishmanioses, Centro de Pesquisas René Rachou/Portuguese Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil.

ABSTRACT
Sandflies are holometabolous insects that are of great epidemiological importance in the neotropical region as vectors of leishmaniases. Caves are ecotopes that significantly differ from external environments and, among the insects that live or visit their internal area and adjacent environment, sandflies are commonly found. Based on this context, the objective of this work was to examine the period of activity of sandflies in the cave environment in the aphotic zone. Thus, four sandfly captures were conducted, one in each season of the year, in a cave where studies on the bioecological aspects of sandfly fauna have been conducted since 2008. In this same study, we have also noticed the presence of flagellates in some captured females. Catches were carried out for 24 hours using a Shannon trap, light bait, and cave walls were actively searched. We collected a total of 638 sandflies, representing 11 species. The most abundant species and with more intense period of activity were, in descending order: Lu. cavernicola (62%), Ev. spelunca (16%) and Ev. sallesi (14%). A total of 69 females were dissected to check for natural infection, and in five specimens we found living flagellated forms: two Ev. spelunca, two Ev. sallesi and one Sc. sordellii. This study shows that the activity of some species caught in the aphotic zone of the cave, especially Lu. cavernicola, differs from what has already been reported in previous sandfly captures, which are almost always conducted at night and during twilight. The existence of sandflies that were naturally infected with flagellates and the lack of awareness regarding the behaviour of sandflies in cave environments are strong indicators of the need for further study on this group of insects in this ecotope, as a safety measure to protect the visitors of such environment.

Show MeSH

Related in: MedlinePlus

Total of sandflies captured with Shannon trap in winter, spring, summer and autumn, in the aphotic zone of the cave - Lassance/MG – Brazil.
© Copyright Policy
Related In: Results  -  Collection


getmorefigures.php?uid=PMC3526590&req=5

pone-0052254-g002: Total of sandflies captured with Shannon trap in winter, spring, summer and autumn, in the aphotic zone of the cave - Lassance/MG – Brazil.

Mentions: Considering all catches together, winter (August 2010), spring (November 2010), summer (February 2011) and autumn (May 2011), a total of 638 sandflies were collected, 358 (56%) males and 280 (44%) females, representing 11 species, where the most abundant species were, in descending order: Lutzomyia cavernicola (Costa Lima, 1932) (62%), Evandromyia spelunca Carvalho, Sanguinette, Brazil & Andrade Filho, 2011 (16%) and Evandromyia sallesi (Galvão & Coutinho, 1939) (14%) (Figure 2).


Hourly activity and natural infection of sandflies (Diptera: psychodidae) captured from the aphotic zone of a cave, minas gerais state, Brazil.

Carvalho GM, Brazil RP, Saraiva L, Quaresma PF, Botelho HA, Ramos MC, de Almeida Zenóbio AP, e Meira PC, de Castilho Sanguinette C, Filho JD - PLoS ONE (2012)

Total of sandflies captured with Shannon trap in winter, spring, summer and autumn, in the aphotic zone of the cave - Lassance/MG – Brazil.
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC3526590&req=5

pone-0052254-g002: Total of sandflies captured with Shannon trap in winter, spring, summer and autumn, in the aphotic zone of the cave - Lassance/MG – Brazil.
Mentions: Considering all catches together, winter (August 2010), spring (November 2010), summer (February 2011) and autumn (May 2011), a total of 638 sandflies were collected, 358 (56%) males and 280 (44%) females, representing 11 species, where the most abundant species were, in descending order: Lutzomyia cavernicola (Costa Lima, 1932) (62%), Evandromyia spelunca Carvalho, Sanguinette, Brazil & Andrade Filho, 2011 (16%) and Evandromyia sallesi (Galvão & Coutinho, 1939) (14%) (Figure 2).

Bottom Line: In this same study, we have also noticed the presence of flagellates in some captured females.The most abundant species and with more intense period of activity were, in descending order: Lu. cavernicola (62%), Ev. spelunca (16%) and Ev. sallesi (14%).A total of 69 females were dissected to check for natural infection, and in five specimens we found living flagellated forms: two Ev. spelunca, two Ev. sallesi and one Sc. sordellii.

View Article: PubMed Central - PubMed

Affiliation: Grupo de Estudos em Leishmanioses, Centro de Pesquisas René Rachou/Portuguese Fundação Oswaldo Cruz, Belo Horizonte, Minas Gerais, Brazil.

ABSTRACT
Sandflies are holometabolous insects that are of great epidemiological importance in the neotropical region as vectors of leishmaniases. Caves are ecotopes that significantly differ from external environments and, among the insects that live or visit their internal area and adjacent environment, sandflies are commonly found. Based on this context, the objective of this work was to examine the period of activity of sandflies in the cave environment in the aphotic zone. Thus, four sandfly captures were conducted, one in each season of the year, in a cave where studies on the bioecological aspects of sandfly fauna have been conducted since 2008. In this same study, we have also noticed the presence of flagellates in some captured females. Catches were carried out for 24 hours using a Shannon trap, light bait, and cave walls were actively searched. We collected a total of 638 sandflies, representing 11 species. The most abundant species and with more intense period of activity were, in descending order: Lu. cavernicola (62%), Ev. spelunca (16%) and Ev. sallesi (14%). A total of 69 females were dissected to check for natural infection, and in five specimens we found living flagellated forms: two Ev. spelunca, two Ev. sallesi and one Sc. sordellii. This study shows that the activity of some species caught in the aphotic zone of the cave, especially Lu. cavernicola, differs from what has already been reported in previous sandfly captures, which are almost always conducted at night and during twilight. The existence of sandflies that were naturally infected with flagellates and the lack of awareness regarding the behaviour of sandflies in cave environments are strong indicators of the need for further study on this group of insects in this ecotope, as a safety measure to protect the visitors of such environment.

Show MeSH
Related in: MedlinePlus