Phlebotominae fauna (Diptera: Psychodidae) in an urban district of Belo Horizonte, Brazil, endemic for visceral leishmaniasis: Characterization of favored locations as determined by spatial analysis

Saraiva, Luiz Alex Silva; Filho, José Dilermando Andrade; Falcão, Alda Lima; Carvalho, Deborah Aparecida Alves de; Souza, Carina Margonari de; Freitas, Christian Rezende; Lopes, Camila Ragonezi Gomes; Moreno, Elizabeth Castro; Melo, Maria Norma

doi:10.1016/j.actatropica.2010.11.007

Cited by 44 publications

(45 citation statements)

References 27 publications

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“…Margonari et al (2006) observed the occurrence of human and canine VL in areas with dense vegetation and the presence of sandflies. Corroborating Saraiva et al (2011), in the present study, dogs were the animals most seen in the vicinity of the collection points. This finding is relevant from the epidemiological point of view as domestic dogs, apart from food source for sandflies, are considered the most important reservoirs of Leishmania in the urban areas (Marzochi & Marzochi 1994).…”

Section: Discussionmentioning

confidence: 72%

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

Oliveira¹,

Silva

Fernandes³

et al. 2012

Mem. Inst. Oswaldo Cruz

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The relationships between environmental exposure to risk agents and health conditions have been studied with the aid of remote sensing imagery, a tool particularly useful in the study of vegetation cover. This study aims to evaluate the influence of environmental variables on the spatial distribution of the abundance of Lutzomyia longipalpis and the reported canine and human visceral leishmaniasis (VL) cases at an urban area of Campo Grande, state of Mato Grosso do Sul. The sandfly captures were performed in 13 residences that were selected by raffle considering four residences or collection station for buffer. These buffers were generated from the central house with about 50, 100 and 200 m from it in an endemic area of VL. The abundance of sandflies and human and canine cases were georreferenced using the GIS software PCI Geomatica. The normalized difference vegetation index (NDVI) and percentage of land covered by vegetation were the environmental variables extracted from a remote sensing IKONOS-2 image. The average NDVI was considered as the complexity of habitat and the standard deviation as the heterogeneity of habitat. One thousand three hundred sixty-seven specimens were collected during the catch. We found a significant positive linear correlation between the abundance of sandflies and the percentage of vegetation cover and average NDVI. However, there was no significant association between habitat heterogeneity and the abundance of these flies

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Section: Discussionmentioning

confidence: 72%

“…longipalpis. Saraiva et al (2011) reported the concentration of incident cases of canine VL Fig. 2: distribution of canine cases reported and the abundance of sandflies in the study area, Campo Grande, state of Mato Grosso do Sul, 2009Sul, -2010 in areas with small populations of vectors.…”

Section: Discussionmentioning

confidence: 99%

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

Oliveira¹,

Silva

Fernandes³

et al. 2012

Mem. Inst. Oswaldo Cruz

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“…The first two Phlebotominae species seem to play major role in ACL transmission in Santarém due to their abundances (163 individuals of N. whitmani and 104 of B. flaviscutellata) compared to the other species. It is an evidence that these species are not becoming synanthropics, as observed in other Diversity of sand flies in domiciliary environment of santarém, state of Pará, Brazil: species composition and abundance patterns in rural and urban areas regions of Brazil (Teodoro et al 1999;Rêbelo 2001;Carvalho et al 2010;Saraiva et al 2011).…”

Section: Discussionmentioning

confidence: 99%

“…In Brazil populations exposed to leishmaniasis are not only inhabitants of rural areas but also miners, hunters, and some periurban populations of some cities (Barrett 1993). Sand fly species domiciliation can result in the occurrence of urban leishmaniasis, as noticed by cases record in the periphery of some Brazilian metropolis (Teodoro et al 1999;Rêbelo 2001;Carvalho et al 2010;Saraiva et al 2011).…”

Section: Introductionmentioning

confidence: 99%

Diversity of sand flies in domiciliary environment of Santarém, state of Pará, Brazil: species composition and abundance patterns in rural and urban areas

Feitosa

Julião

Costa³

et al. 2012

Acta Amaz.

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This paper aimed to evaluate the richness, abundance and frequency of sand fly occurrence in rural and urban areas American visceral leishmaniasis -AVL is endemic in the study area of Santarém municipality, Pará state. Sand flies were collected during 1995-2000, using CDC light traps placed in neighborhoods and rural areas of the municipality. A total of 53.454 individuals and 26 species of sand flies were collected. The most abundant species in both urban and rural environments was Lutzomyia longipalpis, vector of AVL in the area. The highest species richness by capture was in rural area. In all years sampled, the largest number of species of sand fly collected was always in rural areas. The species of sand flies in urban and rural area were similar in 11 species. In the rural area other 11 species were found, a total of 22 species. Shannon-Wiener index ranged from 0.12 to 0.84 at rural areas and 0.08 to 0.34 at urban ones. In general, rural localities showed higher diversity (H') of phlebotomines than urban ones. Individual-based rarefaction curves for each area demonstrated that urban localities had the lowest expected number of phlebotomine species and the richest rural ones reach higher expected values with lower amount of individuals than urban sites. The most frequent species were Lutzomyia longipalpis, Evandromyia carmelinoi and Bichromomyia flaviscutellata. Com o objetivo de comparar a riqueza, abundância e freqüência de ocorrência de flebotomíneos em sítios rurais e urbanos numa área endêmica de leishmaniose visceral no município de Santarém (PA) foi realizado no período entre 1995-2000, capturas de flebotomíneos por meio de armadilhas luminosas CDC montadas no ambiente domiciliar em diferentes bairros e localidades rurais do município. Foram capturados 53.454 indivíduos, de 26 espécies e dentre elas, a mais abundante, tanto em ambiente urbano e rural, foi Lutzomyia longipalpis, vetor da leishmaniose visceral americana na região. Em todos os anos de amostragem, a maior riqueza de espécies por captura foi obtida em áreas rurais. As áreas rurais e urbanas compartilharam onze espécies de flebotomíneos; enquanto este mesmo número de espécies foi exclusivo em áreas rurais. Os índices de ShannonWiener variaram de 0,12 a 0,84 nas localidades rurais e de 0,08 a 0,34 nas áreas urbanas. Em geral, as áreas rurais apresentaram maior diversidade de flebotomíneos comparado às áreas urbanas. As curvas de rarefação baseadas em indivíduos revelaram um rápido aumento no número esperado de espécies em localidades rurais, indicando que amostras com menor quantidade de indivíduos nestas áreas atingem maior riqueza de espécies. As espécies mais freqüentes durante o período de amostragem foram Lutzomyia longipalpis, Evandromyia carmelinoi e Bichromomyia flaviscutellata.

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“…longipalpis abundance, such as those associated with unplanned urbanisation and high population densities, as well as other sociodemographic factors (Grimaldi & Tesh 1993, Oliveira et al 2006a, Mestre & Fontes 2007, Rangel & Vilela 2008, Fernández et al 2010, Saraiva et al 2011. Henhouses, chickens and other domestic animals, fruit trees, tree coverage, poor sanitation and a low socioeconomic level have also been associated with sandfly colonisation and the abundance of breeding sites (Sherlock 1996, Alexander et al 2002, Costa et al 2005, Oliveira et al 2003, 2006b, Fernández et al 2010).…”

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confidence: 99%

Lutzomyia longipalpis abundance in the city of Posadas, northeastern Argentina: variations at different spatial scales

Santini

Fernández

Pérez

et al. 2012

Mem. Inst. Oswaldo Cruz

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The distribution of Lutzomyia longipalpis is heterogeneous with a pattern of high abundance areas (HAAs) embedded in a matrix of low abundance areas (LAAs). The objective of this study was to describe the variability in the abundance of Lu. longipalpis at two different spatial levels and to analyse the relationship between the abundance and multiple environmental variables. Of the environmental variables analysed in each household, the condition that best explained the differences in vector abundance between HAA-LAA was the variable "land_grass", with greater average values in the peridomestic environments within the LAA, and the variables "#sp tree", "#pots" and "dist_water" that were higher in the HAA. Of the environmental variables analysed in the patches, the variable "unpaved_streets" was higher in the LAAs and the variable "prop_inf_dogs" was higher in the HAAs. An understanding of the main environmental variables that influence the vector distribution could contribute to the development of strategies for the prevention and control of visceral leishmaniasis (VL). This is the first work in which environmental variables are analysed at the micro-scale in urban areas at the southern edge of the current range of Lu. longipalpis. Our results represent a significant contribution to the understanding of the abundance of the vector in the peridomestic habitats of the region

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Phlebotominae fauna (Diptera: Psychodidae) in an urban district of Belo Horizonte, Brazil, endemic for visceral leishmaniasis: Characterization of favored locations as determined by spatial analysis

Cited by 44 publications

References 27 publications

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

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

Diversity of sand flies in domiciliary environment of Santarém, state of Pará, Brazil: species composition and abundance patterns in rural and urban areas

Lutzomyia longipalpis abundance in the city of Posadas, northeastern Argentina: variations at different spatial scales

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