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      Prevalencia de Leishmaniosis Visceral Canina en Municipios de Huila - Colombia Translated title: Prevalence of canine visceral leishmaniasis in municipalities of Huila, Colombia

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          Abstract

          Con el propósito de establecer la prevalencia de leishmaniosis canina se efectuó un estudio descriptivo en 307 caninos, ubicados en 17 veredas de los municipios de Neiva, Tello y Algeciras, a los cuales se les practicó examen clínico, punción y aspiración del ganglio linfático poplíteo para extendido y coloración en lámina; toma de sangre completa por venopunción para análisis mediante la técnica de inmunofluorescencia indirecta. La población canina estuvo conformada por perros mestizos con edad promedio de tres años; el 30,6 % fueron hembras y el 69,4 % machos. En el examen físico de los caninos se observó: enflaquecimiento, 31 %; onicogrifosis, 29,3 %; linfadenitis de ganglio poplíteo 3,2 %; áreas alopécicas 21,8 %; lesiones eritematosas 11,5 % y úlceras cutáneas 3,3 %. El 1,4 % de los caninos analizados presentaron amastigotes en el aspirado y el 17,2 % fueron seropositivos. La prevalencia de anticuerpos contra L. chagasi es alta comparada con otros estudios realizados en Colombia y otros países, corroborando la endemicidad de la enfermedad en el área. Por consiguiente, es necesario fortalecer las estrategias de vigilancia epidemiológica y la búsqueda activa de casos humanos.

          Translated abstract

          With the purpose of establishing the prevalence of canine leishmaniasis a descriptive study was carried out in 17 villages of the municipalities of Neiva, Tello and Algeciras, in the department of Huila, Colombia. The selected canine population was composed of 307 dogs, which were submitted to clinical examination, stained smears of lymph node needle aspiration, and bleeding for serological analysis by the Immunofluorescent Antibody Tests (IFAT). The canine population was conformed by mestizo dogs, with a 3 year age average; 30,6 % were females. Upon physical examination loss of weight was observed in 31% of dogs; lynfadenopathy of the popliteal node in 3,2 %; alopecia in 21,8 %, eritematous lesions in 11,5 % and skin ulcers in 3,3 %. 17,2 % of the dogs has a positive serology and in 1.43% of them, amastigotes were observed in the smears of lymph node aspirates. These prevalence of anti-L. chagasi antibodies is relatively high compared with other studies in Colombia and in other countries. The present study, confirms the endemic nature of the illness in the area, high lighting the need for strengthening public health surveillance and active search for human cases.

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          Visceral leishmaniasis in the Metropolitan Region of Belo Horizonte, State of Minas Gerais, Brazil

          In the last few years the number of human cases of American visceral leishmaniasis in the Metropolitan Region of Belo Horizonte (MRBH), Minas Gerais, Brazil has increased, indicating an elevation in the transmission rate of the disease. The total number of notified human cases in the MRBH since 1994, when the first case was identified, up to 1999 was 345 of which 223 (65%) were from the city itself, indicating an urbanization of the disease in this region of Minas Gerais. The age distribution of visceral leishmaniasis cases in the MRBH shows a higher prevalence in children from 0-4 years old, responsible for 28.9% of the notifications. Clinical and immunological findings from dogs infected with Leishmania chagasi are described. The majority of these animals showed no sign of the disease. Sera from all infected dogs showed detectable Leishmania-induced high titles of antibodies based on the results of an indirect fluorescent antibody test. Samples of isolated Leishmania from human and dogs were characterized as L. (L.) chagasi by biochemical and molecular techniques.
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            Epidemiology of visceral leishmaniasis in Colombia.

            Epidemiologic studies were conducted during the period 1986-1988 in a small rural community in Colombia (El Callejon) where visceral leishmaniasis is highly endemic. In this community of 185 people, 14 cases of infantile visceral leishmaniasis were diagnosed in the 9 years 1981-1988. Leishmanin skin testing of a sample of the human residents showed that prevalence of Leishmania chagasi infection increased with age; overall, 51.2% of the subjects had a positive reaction. A canine surveillance program was instituted, using introduced sentinel dogs as well as the indigenous dog population. Eleven of 16 sentinel dogs were infected within 8 months of exposure; mean seroconversion time was 4.4 months. Eleven of 25 seronegative local dogs were also infected during the 26 month period; mean seroconversion time was 8 months. Parasites identified by isozyme electrophoresis as L. chagasi were recovered from 18 of 22 seropositive dogs. Collections of wild animals using baited live traps yielded mainly the neotropical opossum, Didelphis marsupialis. Leishmania chagasi was recovered from 12 of 37 (32.4%) opossums. Six of 681 female Lutzomyia longipalpis collected in the community had flagellates in their guts; cultures from 4 were identified as L. chagasi. These data confirmed that active parasite transmission occurred. The relatively high prevalence of L. chagasi infection found among D. marsupialis captured near human dwellings suggests that these animals may be an important peridomestic reservoir.
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              Diccionario Geográfico de Colombia

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                Author and article information

                Contributors
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                Journal
                rsap
                Revista de Salud Pública
                Rev. salud pública
                Instituto de Salud Publica, Faculdad de Medicina -Universidad Nacional de Colombia (Bogotá )
                0124-0064
                September 2002
                : 4
                : 3
                : 278-285
                Affiliations
                [1 ] Universidad de La Salle Colombia
                [2 ] Universidad de La Salle Colombia
                [3 ] Universidad de La Salle Colombia
                [4 ] Universidad de La Salle Colombia
                [5 ] Secretaría Departamental de Salud del Huila Colombia
                [6 ] Instituto Nacional de Salud Colombia
                [7 ] Instituto Nacional de Salud Colombia
                [8 ] Universidad Nacional de Colombia Colombia
                [9 ] Universidad Nacional de Colombia Colombia
                [10 ] Universidad Nacional de Colombia Colombia
                [11 ] Universidad Nacional de Colombia Colombia
                Article
                S0124-00642002000300005
                5ac9569f-bc3b-4805-8cca-9adabf13858e

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

                History
                Product

                SciELO Colombia

                Self URI (journal page): http://www.scielosp.org/scielo.php?script=sci_serial&pid=0124-0064&lng=en
                Categories
                Health Policy & Services

                Public health
                Leishmania,Leishmaniasis,visceral,epidemiology,Leishmaniasis visceral,epidemiología
                Public health
                Leishmania, Leishmaniasis, visceral, epidemiology, Leishmaniasis visceral, epidemiología

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