Studies on mosquitoes (Diptera: Culicidae) and anthropic environment: 9- Synanthropy and epidemiological vector role of Aedes scapularis in South-Eastern Brazil

Abstract

Behaviour comparisons of Aedes scapularis and Ae. serratus are presented. Results were obtained by sampling Aedes adult mosquitoes at several places in the rural anthropic environment in the Ribeira Valley region of S. Paulo State, Brazil. Aedes dominance was shared by those two species, but Ae. scapularis showed a clear tendency to frequent the modified environment, while Ae. serratus was to be found in the more preserved ones, here represented by the vestigial patchy forests. Regarding the open cultivated land and the dwelling environments, Ae. scapularis preponderates. Considering the regional developmental phases, this mosquito showed a remarkable increase in the modified environment differently from Ae. serratus that underwent a considerable decrease in migrating from the forest to the anthropic environment. As a consequence of these results it is reasonable to conclude that Ae. scapularis may be considered as an epidemiologically efficient vector and that it quite probably played this role in the Rocio encephalitis and other arbovirus epidemics.

Studies on entomological monitoring: mosquito species frequency in riverine habitats of the Igarapava Dam, Southern Region, Brazil

“…scapularis was the most abundant species even in the forest patch, which is a different result from that recorded by FORATTINI et al 10 in the Southern Atlantic Forest, where Ae. serratus was more abundant than Ae.…”

“…The aim of this paper was to compare abundance and richness of mosquitoes of medical importance in diverse habitats before and after the Igarapava reservoir flooding and to describe the changes in abundance of Aedes scapularis, an incriminated vector of Rocio arbovirus and adapted in man-altered environments 10,25 , Anopheles albitarsis s.l., a complex of cryptic species considered an important vector of malaria in some localities and An. darlingi, the primary vector of malaria transmission in Brazil 1,14,15,27,30,31 .…”

Presença de culicídeos em município de porte médio do Estado de São Paulo e risco de ocorrência de febre do Nilo Ocidental e outras arboviroses

“…A baixa abundância numérica registrada para estas espécies pode ter influenciado diretamente o cálculo do índice de diversidade de Simpson que se tornou maior para esse habitat, comparado à mata do IPA que apresentou uma maior riqueza de espécies, contra uma menor riqueza comparada a mata do Bosque que registrou além da baixa abundância, maior equitabilidade entre as espécies. 17,27,42 . Durante a estação climática em que essas espécies ocorrerem em maior abundância, a população humana que adentre a essas áreas de mata estará sujeita a um maior contato com esses mosquitos que podem veicular agentes de doenças como os arbovírus.…”

Mosquito Frequency and Feeding Habits in an Enzootic Canine Dirofilariasis Area in Niterói, State of Rio de Janeiro, Brazil

“…Ae. scapularis was also shown to feed on human, canine and feline hosts, besides being regarded as a hemisynanthropic species (Forattini et al 1987b(Forattini et al , 1993(Forattini et al , 1995.…”