Study of sand flies (Diptera: Psychodidade) in visceral and cutaneous leishmaniasis areas in central western of Minas Gerais state – Brazil

Nascimento, Bruno Warlley Leandro; Saraiva, Luiz Alex Silva; Neto, Rafael Gonçalves Teixeira; Meira, Paula Cavalcante Lamy Serra e; Sanguinette, Cristiani de Castilho; Tonelli, Gabriel Barbosa; Botelho, Helbert Antônio; Belo, Viní­cius Silva; Silva, Eduardo Sérgio da; Gontijo, Célia Maria Ferreira; Filho, José Dilermando Andrade

doi:10.1016/j.actatropica.2012.11.005

Cited by 30 publications

(24 citation statements)

References 44 publications

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“…In Brazil, VL is present in 26 states of the fi ve regions of the Brazilian territory [2][3][4][5] . Since 1980, there has been a change in the epidemiological pattern of VL, which was previously characterized as a rural disease.…”

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confidence: 99%

Temporal, spatial and spatiotemporal analysis of the occurrence of visceral leishmaniasis in humans in the City of Birigui, State of São Paulo, from 1999 to 2012

Vieira

Oliveira

Rodas

et al. 2014

Rev. Soc. Bras. Med. Trop.

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Introduction:In 1999, Birigui and Araçatuba were the fi rst municipalities in the State of São Paulo to present autochthonous cases of visceral leishmaniasis in humans (VLH). The aim of this study was to describe the temporal, spatial and spatiotemporal behaviors of VLH in Birigui. Methods: Secondary data were obtained from the Notifi able Diseases Information System from 1999 to 2012. The incidence, mortality and case fatality rates by sex and age were calculated. The cases of VLH were geocoded and grouped according to census tracts. Local empirical Bayesian incidence rates were calculated. The existence of spatial and spatiotemporal clusters was investigated using SaTScan software. Results: There were 156 confi rmed cases of autochthonous VLH. The incidence rate was higher in the 0-4-year-old children, and the mortality and case fatality rates were higher in people aged 60 years and older. The peaks of incidence occurred in 2006 and 2011. The Bayesian rates identifi ed the presence of VLH in all of the census tracts in the municipality; however, spatial and spatiotemporal clusters were found in the central area of the municipality. Conclusions: Birigui, located in the Araçatuba region, has recently experienced increasing numbers of VLH cases; this increase is contrary to the behavior observed over the entire region, which has shown a decreasing trend in the number of VLH cases. The observations that the highest incidence is in children 0-4 years old and the highest mortality is in people 60 years and older are in agreement with the expected patterns of VLH.

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confidence: 99%

Temporal, spatial and spatiotemporal analysis of the occurrence of visceral leishmaniasis in humans in the City of Birigui, State of São Paulo, from 1999 to 2012

Vieira

Oliveira

Rodas

et al. 2014

Rev. Soc. Bras. Med. Trop.

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“…More than 17 species of the subfamily Phlebotominae have been collected in the urban area of Divinópolis, demonstrating the existence of higher species richness in comparison with other towns in Minas Gerais endemic for VL. Seven of the 17 phlebotomine species identified in Divinópolis were confirmed or suspected vectors of Leishmania spp., among which Lutzomyia longipalpis was the most abundant [40]. The rapid dissemination of VL among the canine population and the emergence of the disease among humans of Divinópolis results from the presence of the agents of disease transmission and Leishmania-harboring reservoirs (dogs), and the inability of PVCLV to break the transmission cycle.…”

Section: Discussionmentioning

confidence: 99%

Canine visceral leishmaniasis in an urban setting of Southeastern Brazil: an ecological study involving spatial analysis

Teixeira-Neto

Silva

Nascimento

et al. 2014

Parasites & Vectors

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Background: The physical characteristics of the environment influence the composition, distribution and behavior of the vectors and mammalian hosts involved in the transmission of visceral leishmaniasis (VL), thereby affecting the epidemiology of the disease. In Brazil, urbanization of human VL is a recent phenomenon and represents an issue of particular concern to local health authorities. The present study aimed to establish the degree of spatial dependency between canine and human VL in the municipality of Divinópolis, Minas Gerais, Brazil, and to identify priority risk areas in which stricter control measures should be implemented. Methods: The selected canine population comprised 3,652 dogs distributed within 11 strata and 1,247 urban blocks. Serum samples were collected between March 2013 and February 2014. Serodiagnosis of dogs was performed using the enzyme-linked immunosorbent assay and the indirect fluorescent-antibody test. The blocks sampled for canine VL and the addresses of the 16 confirmed cases of human VL notified in Divinópolis during the period 2007-2013 were georeferenced. Spatial analysis of the data was performed using Kernel density estimation, Ripley's bivariate K-function and directional distribution methods. Results: The overall prevalence of seropositive animals was 4.63% (range 3.95 -5.31) (n =169) and varied in different strata between 0.9 (range 0.0 -1.91) and 8.73% (range 5.65 -11.81). A positive spatial dependency was detected between human and canine VL in which the occurrence of human cases of the disease tended to concentrate in locations that were close to areas with a higher incidence of canine VL. The priority risk area could be clearly distinguished from Kernel density estimation and standard deviational ellipse plots in which the human VL ellipse was totally enclosed within the canine VL ellipse. Conclusions: The results presented herein will enable the Municipal Health Office of Divinópolis to devise a more effective management plan for human VL in which specific strategies would be applied to areas presenting different levels of risk. This spatial evaluation of leishmaniasis model could be applied in other urban areas of Brazil.

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“…This species commonly spread in the State of Minas Gerais and has been found naturally infected with L. infantum (27) . There are no records to date suggesting that this species uses humans as hosts.…”

Section: Discussionmentioning

confidence: 99%

Sandflies (Diptera: Psychodidae) in an urban area of Northeastern Brazil

Agra

Costa

Duque

et al. 2016

Rev. Soc. Bras. Med. Trop.

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Introduction:The sandfl y fauna is well studied globally. In Brazil, sandfl y fauna is very diverse in the Northeast region, especially in states such as Maranhão, Ceará, and Bahia. However, in the State of Pernambuco, the distribution of these insects is still not well known. Therefore, the objective of this study was to identify the different species that constitute the sandfl y fauna in an urban area in the Northeast region of Brazil, where an outbreak of visceral leishmaniasis (VL) was recently reported. Methods: The sandfl ies were collected from an urban area endemic for VL, at fi ve collection points. The collection of samples was carried out from November 2014 to December 2015, using CDC light traps installed in intradomiciliary and peridomiciliary fashion. Results: The collected sandfl ies (n = 297) belonged to eight species: Lutzomyia lenti, Lutzomyia longipalpis, Lutzomyia sallesi, Lutzomyia migonei, Lutzomyia walkeri, Lutzomyia capixaba, Lutzomyia carmelinoi, and Lutzomyia whitmani. Most of the specimens collected were peridomiciliary (247/297, 83%). L. lenti (154/297, 52%) was the most frequently sampled species, followed by L. longipalpis (88/297, 29.6%), and L. sallesi (42/297, 14.1%), which together accounted for over 90% of the collected sandfl y specimens. Conclusions: The continued presence of L. longipalpis in urban areas, including that in intradomiciliary areas, with a predominance of females, is crucial because of the high possibility of them causing VL outbreaks, since this species is the main vector of Leishmania infantum in Brazil.

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Study of sand flies (Diptera: Psychodidade) in visceral and cutaneous leishmaniasis areas in central western of Minas Gerais state – Brazil

Cited by 30 publications

References 44 publications

Temporal, spatial and spatiotemporal analysis of the occurrence of visceral leishmaniasis in humans in the City of Birigui, State of São Paulo, from 1999 to 2012

Temporal, spatial and spatiotemporal analysis of the occurrence of visceral leishmaniasis in humans in the City of Birigui, State of São Paulo, from 1999 to 2012

Canine visceral leishmaniasis in an urban setting of Southeastern Brazil: an ecological study involving spatial analysis

Sandflies (Diptera: Psychodidae) in an urban area of Northeastern Brazil

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