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A new species of Cystoisospora Frenkel, 1977 (Apicomplexa: Sarcocystidae) from Oecomys mamorae Thomas (Rodentia: Cricetidae) in the Brazilian Pantanal.

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Title: A new species of Cystoisospora Frenkel, 1977 (Apicomplexa: Sarcocystidae) from Oecomys mamorae Thomas (Rodentia: Cricetidae) in the Brazilian Pantanal.
Authors: Barreto, Wanessa Teixeira Gomes1, de Andrade, Gisele Braziliano1 gisele@ucdb.br, Viana, Lúcio André2, de Oliveira Porfírio, Grasiela Edith1, Santos, Filipe Martins1, Perdomo, Alessandra Cabral1, do Carmo, Jéssica Soares1, da Silva, Alanderson Rodrigues1, Maltezo, Taynara Rocha1, Herrera, Heitor Miraglia1
Source: Systematic Parasitology. May2018, Vol. 95 Issue 4, p383-389. 7p.
Subject Terms: *Coccidia, *Apicomplexa, *Sarcocystidae, *Rodents, *Cricetidae, *Flotation
Abstract: Despite the great diversity of coccidians, to our knowledge, no coccidian infections have been described in Oecomys spp. In this context, we examined Oecomys mamorae Thomas (Rodentia: Cricetidae) from the Brazilian Pantanal for infections with enteric coccidia. Nine individuals were sampled, and one was found to be infected. The oöcysts were recovered through centrifugal flotation in sugar solution. Using morphological and morphometric features, we described a new species of Cystoisospora Frenkel, 1977. Sporulated oöcysts were ovoidal 20.0-29.1 × 16.4-23.2 (26.7 × 21.2) µm and contained two sporocysts, 12.9-19.1 × 9.4-13.9 (16.4 × 12.4) µm, each with four banana-shaped sporozoites. Polar granule and oöcyst residuum were both absent. We documented the developmental forms in the small intestine and described the histopathological lesions in the enteric tract. Our results indicate that the prevalence of Cystoisospora mamorae n. sp. in O. mamorae is low, and tissue damage in the enteric tract is mild, even in the presence of coccidian developmental stages. [ABSTRACT FROM AUTHOR]
Database: Energy & Power Source
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Abstract:Despite the great diversity of coccidians, to our knowledge, no coccidian infections have been described in <italic>Oecomys</italic> spp. In this context, we examined <italic>Oecomys mamorae</italic> Thomas (Rodentia: Cricetidae) from the Brazilian Pantanal for infections with enteric coccidia. Nine individuals were sampled, and one was found to be infected. The oöcysts were recovered through centrifugal flotation in sugar solution. Using morphological and morphometric features, we described a new species of <italic>Cystoisospora</italic> Frenkel, 1977. Sporulated oöcysts were ovoidal 20.0-29.1 × 16.4-23.2 (26.7 × 21.2) µm and contained two sporocysts, 12.9-19.1 × 9.4-13.9 (16.4 × 12.4) µm, each with four banana-shaped sporozoites. Polar granule and oöcyst residuum were both absent. We documented the developmental forms in the small intestine and described the histopathological lesions in the enteric tract. Our results indicate that the prevalence of <italic>Cystoisospora mamorae</italic> n. sp. in <italic>O</italic>. <italic>mamorae</italic> is low, and tissue damage in the enteric tract is mild, even in the presence of coccidian developmental stages. [ABSTRACT FROM AUTHOR]
ISSN:01655752
DOI:10.1007/s11230-018-9788-y