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      Evidencias de parásitos internos en animales vivos: una población de Chaetophractus vellerosus (Xenarthra: Dasypodidae) como modelo de estudio coproparasitológico Translated title: Evidences of internal parasites in live animals: a population of Chaetophractus vellerosus (Xenarthra: Dasypodidae) as model of coproparasitological study

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          Abstract

          El objetivo de este trabajo fue analizar la fauna parasitaria de una población de Chaetophractus vellerosus de Magdalena, provincia de Buenos Aires, Argentina, mediante análisis coproparasitológicos. Se evaluó la influencia de distintos parámetros del hospedero -edad, sexo, talla y peso- estacionalidad, cobertura vegetal y el impacto antrópico sobre la dinámica de la estructura parasitaria. Se hallaron ooquistes de 2 especies de Eimeria (Protozoa-Coccidea) y huevos de Aspidodera sp., Trichostrongylina, Ancylostoma sp. y Trichuris sp. (Nematoda). Los parásitos de mayor prevalencia fueron Eimeria sp. y Aspidodera sp., el de menor, Ancylostoma sp. Las cargas parasitarias de los coccidios fueron mayores en los hospederos juveniles; las de Trichuris sp. fueron mayores en los machos. Sólo los Trichostrongylina tuvieron mayores cargas en los hospederos con mala condición corporal. Trichostrongylina y Eimeria sp. fueron más prevalentes en verano, mientras que Aspidodera sp. lo fue en invierno. Ni la cobertura vegetal ni el impacto antrópico influenciaron sobre las cargas parasitarias. El presente estudio permitió conocer la fauna parasitaria de una población de C. vellerosus (Dasypodidae) en Argentina mediante el análisis coproparasitológico y su seguimiento durante 4 años consecutivos.

          Translated abstract

          The aim of this study was to analyze the parasitic fauna of a population of Chaetophractus vellerosus from Magdalena, Buenos Aires province, Argentina, by parasitological analysis. We evaluated the influence on the parasitic dynamics of different host parameters -age, sex, height and weight- as well as seasonality, vegetation and human impact. Oocysts of 2 species of Eimeria (Protozoa-Coccidea) and eggs of Aspidodera sp. Trichostrongylina, Ancylostoma sp. and Trichuris sp. (Nematoda) were found. Eimeria sp. and Aspidodera sp. were the most prevalent parasites, and Ancylostoma sp. was the lowest prevalent. Parasite loads of coccideans were higher in hosts young. Parasite loads of Trichuris sp. were higher in males. Only Trichostrongylina had greater loads in specimens with poor body condition. Trichostrongylina and Eimeria sp. were most prevalent in summer, while Aspidodera sp. was in winter. Neither vegetation nor human impact influenced in parasitic loads. This study enabled us to know the parasitic fauna of a population of C. vellerosus (Dasypodidae) in Argentina through coproparasitological analysis, and monitor it for 4 consecutive years.

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          Most cited references41

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          Nematode parasites of vertebrates: their development and transmission.

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            Disease spread, susceptibility and infection intensity: vicious circles?

            Epidemiological models and studies of disease ecology typically ignore the role of host condition and immunocompetence when trying to explain the distribution and dynamics of infections and their impact on host dynamics. Recent research, however, indicates that host susceptibility should be considered carefully if we are to understand the mechanism by which parasite dynamics influence host dynamics and vice versa. Studies in insects, fish, amphibians and rodents show that infection occurrence and intensity are more probable and more severe in individuals with an underlying poor condition. Moreover, infection itself results in further deterioration of the host and a 'vicious circle' is created. We argue that this potential synergy between host susceptibility and infection should be more widely acknowledged in disease ecology research. Copyright 2009 Elsevier Ltd. All rights reserved.
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              A guideline for the preparation of species descriptions in the Eimeriidae.

              Members of the suborder Eimeriina (phylum Apicomplexa: class Sporozoea: order Eucoccidiorida) have complex 1 or 2 host life cycles that involve endogenous development in the tissues of vertebrates or invertebrates and exogenous development in an oocyst, usually outside the host(s). Because tissue stages are logistically difficult or even impossible to obtain in natural (wild) host-parasite systems, the vast majority (> 98%) of species in this parasite complex are known only from the structure of their sporulated oocyst. Unfortunately, the quality of these species descriptions is uneven because no guidelines are available for workers in the field to follow. Here we propose a specific set of guidelines for the preparation of species descriptions of coccidia based predominently on the structure of the sporulated oocyst, because the oocyst is the most readily available stage in the life cycle. In addition, we emphasize that ancillary data be incorporated whenever possible with the species description; these data may include, but are not limited to, ecological parameters, prevalence, seasonal data, and the deposition of both host symbiotypes and parasite hepantotypes (= phototypes) into accredited musecums so that accurate identification of both host and parasite material can be assured in perpetuity. And finally, if oocysts are collected in pure suspension, that is, if only one coccidian species (morphotype) is present in the sample, then some oocysts should be saved in 70% ethanol and archived in an accredited museum in the event that future workers might wish to amplify and, later, sequence the parasite's DNA.
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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Role: ND
                Role: ND
                Journal
                rmbiodiv
                Revista mexicana de biodiversidad
                Rev. Mex. Biodiv.
                Instituto de Biología (México )
                2007-8706
                2014
                : 85
                : 3
                : 845-853
                Affiliations
                [1 ] Consejo Nacional de Investigaciones Científicas y Técnicas Argentina
                [2 ] Universidad Nacional de La Plata Argentina
                [3 ] Consejo Nacional de Investigaciones Cientificas y Técnicas Argentina
                Article
                S1870-34532014000400014
                10.7550/rmb.40472
                452b969b-8714-4e21-be1b-f0feb6f2fc67

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

                History
                Categories
                Biodiversity Conservation

                Animal science & Zoology
                armadillos,Eimeria,Aspidodera,Trichostrongylina,Trichuris,Ancylostoma
                Animal science & Zoology
                armadillos, Eimeria, Aspidodera, Trichostrongylina, Trichuris, Ancylostoma

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