Seasonality of sand flies (Diptera: Psychodidae) and Leishmania DNA detection in vector species in an area with endemic visceral leishmaniasis



Document title: Seasonality of sand flies (Diptera: Psychodidae) and Leishmania DNA detection in vector species in an area with endemic visceral leishmaniasis
Journal: Memorias do Instituto Oswaldo Cruz
Database: PERIÓDICA
System number: 000405470
ISSN: 0074-0276
Authors: 1
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Institutions: 1Fundacao Oswaldo Cruz, Centro de Pesquisas Rene Rachou, Belo Horizonte, Minas Gerais. Brasil
2Prefeitura Municipal de Belo Horizonte, Gerencia de Controle de Zoonoses, Belo Horizonte, Minas Gerais. Brasil
Year:
Season: Abr
Volumen: 112
Number: 4
Pages: 309-318
Country: Brasil
Language: Inglés
Document type: Artículo
Approach: Experimental, aplicado
English abstract Leishmaniases are a serious health problem in southeast Brazil, including the city of Belo Horizonte (BH), Minas Gerais state (MG), where there are high rates of incidence and mortality due to visceral leishmaniases. BH is divided into nine sanitary districts (SD) of which one, the Venda Nova SD, was selected for this study because it has high rates of positivity for canine leishmaniasis and high incidence of human leishmaniasis. OBJECTIVES This study aimed to survey the sand fly fauna in Venda Nova SD from August 2011 to July 2013 and perform a descriptive analysis of the vector population. METHODS The sampling was carried out using automatic HP light traps at all covered areas of the Venda Nova SD, in a total of eighteen light traps. Sampled specimens were identified following Galati (2003), and females were submitted to molecular techniques for the detection and identification of Leishmania DNA. A simple environmental description was done for it area and Kernel estimation was used to infer vector density for each study site. FINDINGS A total of 2,427 sand fly specimens belonging to eight species and five genera were collected of which 95.3% were Lutzomyia longipalpis. The seasonal variation curve was delineated by this species. Lu. longipalpis was the most abundant at all collection points and in all months of the study, and exhibited a natural infection rate of 1.01% for Leishmania infantum and 1.77% for Leishmania braziliensis. MAIN CONCLUSIONS The results show the presence and adaptation of Lu. longipalpis to the anthropic environment of BH and reinforces its role as the main vector of L. infantum in the region
Disciplines: Medicina,
Biología
Keyword: Salud pública,
Insectos,
Parasitología,
Leishmaniasis visceral,
Epidemiología,
Vectores biológicos,
Dinámica de poblaciones,
Lutzomyia longipalpis,
Areas endémicas
Keyword: Medicine,
Biology,
Public health,
Insects,
Parasitology,
Visceral leishmaniasis,
Epidemiology,
Biological vectors,
Population dynamics,
Lutzomyia longipalpis,
Endemic areas
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