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      First report of Lymnaea columella Say, 1817 (Pulmonata: Lymnaeidae) naturally infected with Fasciola hepatica (Linnaeus,1758) (Trematoda: Digenea) in Argentina

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          Abstract

          We report the first evidence of natural infection of Lymnaea columella with Fasciola hepatica in Argentina. A sample of 601 snails was collected in May 2003 in northeastern Corrientes, a province bounded on the north by Paraguay, on the east by Brazil and on the southeast by Uruguay. Among 500 examined snails, 44 (8.8%) were exclusively infected with F. hepatica. Parasite identification was based on morphological features of cercariae from snails, and of eggs and adult flukes from Wistar rats. We discuss the events suggesting that an enzootic transmission cycle of F. hepatica has been recently established in northeastern Corrientes.

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          Recent Lymnaeidae: their variation, morphology, taxonomy, nomenclature, and distribution

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            Lymnaea viatrix and Lymnaea columella in the neotropical region: a distributional outline

            A review of lymnaeid samples collected by the author from 106 localities in Mexico, Cuba, Jamaica, Haiti, Dominican Republic, Puerto Rico, Martinique, Saint Lucia, Guatemala, Costa Rica, Panamá, Ecuador, Peru, Bolivia, Chile, Argentina, Uruguay andBrazil showed that one of them (from Ecuador) belonged to Lymnaea cousini Jousseaume, 1887, and all the others to either L. viatrix Orbigny, 1835 or l. columella Say, 1817. The ranges of L. viatrix and L. columella overlap in Middle America, and in northern and southern South America (Venezuela-Colombia-Ecuador and northeastern Argentina-Uruguay-southernmost Brazil, respectively). L. viatrix was the only species found in Peru west of the Andes and in Chile, and is supposed to have migrated eastward to Argentina via the Negro river basin. The range of L. columella in South America is discontinuous. The species has been recorded from Venezuela, Colombia and Ecuador and, east of the Andes, from latitudes 15º S (central-west Brazil) to 35º S (La Plata, Argentina). Such a gap may be attributed to either introduction from the northern into the southern area, or migration along the unsampled region on the eastern side of the Andes, or extinction in the now vacant area. No lymnaeids have been found so far in Brazil north of latitude 15º S and in the Guianas. A revisão de amostras de limneídeos coletados pelo autor em 106 localidades no México, Cuba, Jamaica, Haiti, República Dominicana, Porto Rico, Martinica, Santa Lúcia, Guatemala, Costa Rica, Panamá, Equador, Peru, Bolívia, Chile, Argentina, Uruguai e Brasil mostrou que uma delas (do Equador) pertencia a Lymnaea cousini Jousseaume, 1887, e que todas as outras pertenciam a L. viatrix Orbigny, 1835 ou a L. columella Say, 1817. As distribuições da L. viatrix e da l. columella sobrepõem-se na Meso-América e na América do Sul setentrional (Venezuela-Colômbia-Equador) e meridional (nordeste da Argentina-Uruguai-extremo sul do Brasil). A L. viatrix foi a única espécie encontrada no Peru, a oeste dos Andes, e no Chile,parecendo ter migrado na direção leste para a Argentina através da bacia do rio Negro. A distribuição de L. columella na América do Sul é descontínua. Tem sido encontrada na Venezuela, Colômbia e Equador e, a leste dos Andes, entre as latitudes 15º S (Centro-Oeste do Brasil) e 35º S (La Plata, Argentina). Esse hiato na distribuição pode ser atribuído à introdução da espécie do norte para o sul, ou à migração ao longo da faixa não estudada no lado leste dos Andes, ou à extinção na área atualmente vaga. Até agora não foi registrada a presença de limneídeos no Brasil ao norte da latitude 15º S e nas Guianas.
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              Ocorrência de infecção natural de Fasciola hepatica Linnaeus, 1758 em Lymnaea columella Say, 1817 no Vale do Paraíba, SP, Brasil

              Foram registradas em Piquete, no vale do rio Paraíba do Sul (SP), Brasil, taxas de 1,22% e 0,14% de infecção natural em Lymnaea columella, por Fasciola hepatica. Em um único exemplar de Lymnaea columella dentre os 1.052 examinados, foram observadas rédias com xifidiocercárias, rédias com cercárias de Fasciola hepatica e metacercárias de Echinostomatidae.
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                Author and article information

                Journal
                mioc
                Memórias do Instituto Oswaldo Cruz
                Mem. Inst. Oswaldo Cruz
                Instituto Oswaldo Cruz, Ministério da Saúde (Rio de Janeiro, RJ, Brazil )
                0074-0276
                1678-8060
                October 2003
                : 98
                : 7
                : 889-891
                Affiliations
                [02] orgnameUniversidad Nacional del Nordeste
                [01] Buenos Aires orgnameUniversidad de Buenos Aires orgdiv1Facultad de Ciencias Exactas y Naturales orgdiv2Departamento de Ecología, Genética y Evolución Argentina
                Article
                S0074-02762003000700005 S0074-0276(03)09800705
                10.1590/S0074-02762003000700005
                776b97a8-5882-4dc2-a054-c754e91e1953

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 25 September 2003
                : 28 August 2003
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 23, Pages: 3
                Product

                SciELO Brazil

                Categories
                Epidemiology

                Argentina,Lymnaea columella,Fasciola hepatica infection

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