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      Seasonal variation and natural infection of Lutzomyia antunesi (Diptera: Psychodidae: Phlebotominae), an endemic species in the Orinoquia region of Colombia

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          Abstract

          Lutzomyia antunesi has been commonly reported in outbreaks of cutaneous leishmaniasis (CL) in the Orinoquia region of Colombia. The bionomics of this species were studied in the municipality of Villavicencio (Meta, Colombia). Sandflies were captured over the course of one week per month for one year in intradomiciliary, peridomiciliary and extradomiciliary housing areas. The captures were performed from 06:00 pm-06:00 am using CDC light traps and the females were processed for polymerase chain reaction (PCR) to detect Leishmania spp. A total of 22,097 specimens and 19 species were captured of which Lu. antunesi (89%) and Lutzomyia walkeri (5%) were the most abundant. Other species recognised as anthropophilic (Lutzomyia panamensis, Lutzomyia gomezi, Lutzomyia flaviscutellata and Lutzomyia fairtigi) were present in very low abundance (< 2%). Natural infection with Leishmania spp was detected using PCR in Lu. antunesi, Lu. panamensis and Lu. flavicutellata, showing infection rates of 1%, 4.8% and 7.5%, respectively. The present paper provides information on various ecological aspects of Lu. antunesi. An analysis of seasonality shows that this species increases in abundance in the hottest months (December, January and February), directly correlating with the maximum temperature and inversely correlating with precipitation. The natural infection rate is associated with the peaks of highest abundance.

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          Registro de leishmaniasis cutánea en caninos presentes en zonas periurbana de Villavicencio, Meta y su importancia en la salud pública

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            Phlebotomus vectors of the leishmaniasis: a review

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              Ecology of sandflies (Diptera:Psychodidae) in a restricted focus of cutaneous leishmaniasis in northern Venezuela. IV. Sandfly monthly fluctuation and leishmaniasis incidence relationship.

              An attempt has been made to correlate the monthly incidence of human leishmaniasis with the temporal distribution of sandfly species at San Esteban, Northern Venezuela. Upon statistical analysis, the seasonal fluctuation of L. ovallesi population correlated strongly with the human disease, while the dynamics of L. panamensis, generally believed to be the vector in the Central area of the country, showed only a very weak correlation. These findings support the hypothesis that L. panamensis might not be the main or unique species responsible for the transmission in this area and that L. ovallesi and additionally L. olmeca bicolor might be involved in the epidemiology of the disease.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                mioc
                Memórias do Instituto Oswaldo Cruz
                Mem. Inst. Oswaldo Cruz
                Instituto Oswaldo Cruz, Ministério da Saúde (Rio de Janeiro )
                1678-8060
                June 2013
                : 108
                : 4
                : 463-469
                Affiliations
                [1 ] Corporacion para la Investigacion en Salud Tropical Colombia
                [2 ] Universidad de los Llanos Colombia
                [3 ] Universidad Nacional de Colombia Colombia
                [4 ] Colorado State University United States
                [5 ] Secretaria de Salud del Meta Colombia
                Article
                S0074-02762013000400463
                10.1590/S0074-0276108042013011
                8c0577d3-fb4e-4aa6-9c25-1727df2aa0ee

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0074-0276&lng=en
                Categories
                PARASITOLOGY
                TROPICAL MEDICINE

                Parasitology,Infectious disease & Microbiology
                Lutzomyia antunesi,leishmaniasis,natural infection,sandflies,seasonal variation,Colombia

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