Effect of Abiotic Factors on Seasonal Population Dynamics of Lutzomyia longipalpis (Diptera: Psychodidae) in Northeastern Brazil

The resurgence of visceral leishmaniasis in Brazil increases the need for studies to elucidate the spatial and temporal dynamics of Lutzomyia longipalpis (Lutz & Neiva) (Diptera: Psychodidae), the vector of Leishmania infantum, the causative agent of visceral leishmaniasis in Brazil. Sand flies...

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Veröffentlicht in:Journal of medical entomology 2006-09, Vol.43 (5), p.990-995
Hauptverfasser: de Melo Ximenes, Maria de Fátima Freire, Castellón, Eloy G., de Souza, Maria de Fátima, Menezes, Alexandre A. Lara, Queiroz, José Wilton, Macedo E Silva, Virgínia Penéllope, Jerônimo, Selma M. B.
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container_issue 5
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container_title Journal of medical entomology
container_volume 43
creator de Melo Ximenes, Maria de Fátima Freire
Castellón, Eloy G.
de Souza, Maria de Fátima
Menezes, Alexandre A. Lara
Queiroz, José Wilton
Macedo E Silva, Virgínia Penéllope
Jerônimo, Selma M. B.
description The resurgence of visceral leishmaniasis in Brazil increases the need for studies to elucidate the spatial and temporal dynamics of Lutzomyia longipalpis (Lutz & Neiva) (Diptera: Psychodidae), the vector of Leishmania infantum, the causative agent of visceral leishmaniasis in Brazil. Sand flies were captured in peridomestic habitats biweekly for 3 yr. Cross-correlation tests and spectral analysis were used to analyze the simultaneous and lag-time correlations between Lu. longipalpis population densities and abiotic factors of temperature, relative humidity, wind velocity, and rainfall. Distinct seasonal patterns were observed for males and females, with intervals of 6 mo between population peaks for males and 12 mo for females. Peak female population densities lagged 3 mo behind the maximum annual temperature. Female population density was negatively correlated with relative humidity. An increase in average wind velocity was followed by a decrease in the number of females for 2 wk. Understanding the relationship between the seasonal population dynamics of Lu. longipalpis and abiotic factors will contribute to the design of better control measures to decrease transmission of L. infantum and consequently the incidence of leishmaniasis.
doi_str_mv 10.1603/0022-2585%282006%2943%5B990%3AEOAFOS%5D2.0.CO%3B2
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Distinct seasonal patterns were observed for males and females, with intervals of 6 mo between population peaks for males and 12 mo for females. Peak female population densities lagged 3 mo behind the maximum annual temperature. Female population density was negatively correlated with relative humidity. An increase in average wind velocity was followed by a decrease in the number of females for 2 wk. 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Psychology ; gender differences ; General aspects ; Humans ; insect vectors ; Insect Vectors - physiology ; Leishmania infantum ; Leishmaniasis, Visceral - epidemiology ; Lutzomyia longipalpis ; Male ; Medically important nuisances and vectors, pests of stored products and materials: population survey and control ; Population Density ; population dynamics ; Psychodidae - physiology ; rain ; relative humidity ; seasonal variation ; seasonality ; Seasons ; temperature ; Time Factors ; VECTOR-BORNE DISEASES, SURVEILLANCE, PREVENTION ; Vectors. 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Psychology</subject><subject>gender differences</subject><subject>General aspects</subject><subject>Humans</subject><subject>insect vectors</subject><subject>Insect Vectors - physiology</subject><subject>Leishmania infantum</subject><subject>Leishmaniasis, Visceral - epidemiology</subject><subject>Lutzomyia longipalpis</subject><subject>Male</subject><subject>Medically important nuisances and vectors, pests of stored products and materials: population survey and control</subject><subject>Population Density</subject><subject>population dynamics</subject><subject>Psychodidae - physiology</subject><subject>rain</subject><subject>relative humidity</subject><subject>seasonal variation</subject><subject>seasonality</subject><subject>Seasons</subject><subject>temperature</subject><subject>Time Factors</subject><subject>VECTOR-BORNE DISEASES, SURVEILLANCE, PREVENTION</subject><subject>Vectors. 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source MEDLINE; BioOne Complete; Oxford University Press Journals All Titles (1996-Current)
subjects Animal and plant ecology
Animal, plant and microbial ecology
Animals
Biological and medical sciences
Brazil
Circadian Rhythm - physiology
climate
climatic factors
Demecology
Dogs
Female
Fundamental and applied biological sciences. Psychology
gender differences
General aspects
Humans
insect vectors
Insect Vectors - physiology
Leishmania infantum
Leishmaniasis, Visceral - epidemiology
Lutzomyia longipalpis
Male
Medically important nuisances and vectors, pests of stored products and materials: population survey and control
Population Density
population dynamics
Psychodidae - physiology
rain
relative humidity
seasonal variation
seasonality
Seasons
temperature
Time Factors
VECTOR-BORNE DISEASES, SURVEILLANCE, PREVENTION
Vectors. Intermediate hosts
visceral leishmaniasis
Weather
wind speed
title Effect of Abiotic Factors on Seasonal Population Dynamics of Lutzomyia longipalpis (Diptera: Psychodidae) in Northeastern Brazil
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