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      Sandfly (Diptera: Psychodidae: Phlebotominae) species diversity in an urban area of the municipality of Tapachula, Chiapas, Mexico

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          Abstract

          Monitoring phlebotomine sandflies in urban areas is key for epidemiological studies in susceptible populations. This paper describes sandfly fauna that were present in an urban area of the municipality of Tapachula, Chiapas, Mexico, and were captured with Shannon and CDC light traps. During February and March of 2014, 1,442 sandflies were captured, specifically Lutzomyia cruciata (Coquillet) (98.8%), Lutzomyia cayennensis cayennensis (Floch and Abonnenc) (0.8%), Lutzomyia chiapanensis (Dampf) (0.3%) and Lutzomyia atulapai (De León) (0.1%). Lu. cruciata was the most abundant and the most frequently trapped species. This is the first record of its remarkable ability to adapt to urban green areas. The three other species trapped represent new records of geographic distribution for the study region. These results indicate the need to establish measures for reducing both human contact with this vector and the risk of possible sites of infection.

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          Ecology of the leishmania species in the Guianan ecoregion complex.

          Brice Rotureau (2005)
          In the Guianan ecoregion complex, at least seven Leishmania species belonging to both the L. (Leishmania) Saf' janova, 1982 and L. (Viannia) Lainson and Shaw, 1987 sub-genera are causative agents of American visceral leishmaniasis, mucocutaneous leishmaniasis, and cutaneous leishmaniases, including localized and diffuse forms. They are mostly sylvatic species subjugated to their own specific Lutzomyia sand fly vectors and to particular wild mammalian reservoir hosts of the dense rain forest. Originally implicated strictly in wild zoonoses and developing in forested ecotopes, Leishmania show a particular adaptive plasticity to face environmental modifications following deforestation and anthropization. This review presents the different pathogenic complexes of these parasites, emphasizes their implication in human diseases, and considers the influence of humans on their ecology.
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            Risk factors in the spread of leishmaniases: towards integrated monitoring?

            Jean-Claude Dujardin (2005)
            Environmental changes, immune status and treatment failure constitute the three major risk factors for the (re-)emergence and spread of leishmaniases. Except for Leishmania-HIV co-infection, these risk factors are not systematically monitored and their interaction is poorly studied and understood. Recently, the multidisciplinary network Leish-Med was launched to document this issue around the Mediterranean and to promote transborder control strategies.
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              Incrimination of four sandfly species previously unrecognized as vectors of Leishmania parasites in Mexico.

              F. Escobedo-Ortegón, A Pech, E Rebollar-Tellez … (2010)
              Cutaneous leishmaniasis (CL) is endemic to the Yucatan Peninsula of Mexico. The main causative agent is the parasite Leishmania mexicana (Biagi) (Kinetoplastida: Trypanosomatidae) and, based on the classic work of Dr Biagi's research team, it has been generally accepted and frequently reported that the only vector of L. mexicana in the region is the sandfly Lutzomyia olmeca olmeca (Vargas & Diáz-Nájera) (Diptera: Psychodidae). Evidence gathered from recent entomological studies conducted mainly in Calakmul, Campeche, however, suggests that other species may also be vectors of L. mexicana. We conducted a field study in two villages in Calakmul, Campeche in the Yucatan Peninsula, where recent cases of CL have been reported, to document the species composition and relative abundances of the sandfly fauna and to identify which species are likely to be the main vectors by assessing the biting rates and parasite infection rates of the suspected vector species. Sandfly catches were conducted from November 2005 to February 2006 in Unión 20 de Junio and Dos Lagunas Sur. Sandflies were captured using Shannon (18.00-22.00 hours), Disney and CDC light traps (18.00-06.00 hours). Biting and infection rates were calculated for the four most abundant species: Lutzomyia cruciata (Coquillett), Lu. o. olmeca, Lutzomyia panamensis (Shannon) and Lutzomyia shannoni (Dyar). In Dos Lagunas Sur, Lu. panamensis and Lu. o. olmeca exhibited the highest biting rates throughout the sampling period. In Unión 20 de Junio, Lu. cruciata and Lu. o. olmeca had the highest biting rates over the same period. Regarding infection rates, we report herein the establishment of a polymerase chain reaction protocol and validation of IR1 and LM17 oligonucleotides to analyse the infection rates of sandflies. Out of 769 females analysed, the overall infection rates were 1.4% in Dos Lagunas Sur and 5.3% in Unión 20 de Junio. In Dos Lagunas Sur we found L. mexicana infections in two sandfly species, Lu. shannoni and Lutzomyia ylephiletor (Fairchild & Hertig), whereas in Unión 20 de Junio we found infections in Lu. shannoni, Lu. cruciata, Lu. o. olmeca and Lu. panamensis. The possible role of these four sandfly species in relation to L. mexicana transmission in Calakmul is discussed.
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                Author and article information

                Journal
                Journal ID (nlm-ta): Mem Inst Oswaldo Cruz
                Journal ID (iso-abbrev): Mem. Inst. Oswaldo Cruz
                Title: Memórias do Instituto Oswaldo Cruz
                Publisher: Instituto Oswaldo Cruz, Ministério da Saúde
                ISSN (Print): 0074-0276
                ISSN (Electronic): 1678-8060
                Publication date (Print and electronic): February 2015
                Publication date (Print): February 2015
                Volume: 110
                Issue: 1
                Pages: 142-144
                Affiliations
                [1 ]Ecología de Artrópodos y Manejo de Plagas, El Colegio de la Frontera Sur, Tapachula, Chiapas, México
                [2 ]Departamento de Zoología de Invertebrados, Facultad de Ciencias Biológicas, San Nicolás de los Garza, Nuevo León, México
                Author notes
                + Corresponding author: omikery@ 123456ecosur.edu.mx
                Article
                DOI: 10.1590/0074-02760140351
                PMC ID: 4371229
                PubMed ID: 25742275
                SO-VID: e45d5315-9296-46cb-9e8f-73d3dce934b2
                License:

                This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

                History
                Date received : 23 September 2014
                Date accepted : 18 December 2014
                Page count
                Figures: 1, Tables: 1, References: 21, Pages: 1
                Categories
                Subject: Short Communication

                Keywords: sandflies,urban area,mexico,urbanisation
                Data availability:
                Keywords: sandflies, urban area, mexico, urbanisation

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