First report of Dipetalonema gracile in a captive Marcgrave's capuchin monkey (Sapajus flavius) in northeastern Brazil: Scientific communication

Ayodhya Cardoso Ramalho, Rafael Felipe da Costa Vieira, Max Bruno Magno Bacalhao, Monica Tiemi Aline Kakimori, Thállitha Samih Wischral Jaime Vieira, Monalisa Valesca Soares de Farias Guerra, Ricardo Barbosa de Lucena, Jaqueline Bianque de Oliveira, Ricardo Romão Guerra

Abstract


Parasitic infections are important concern to the Wildlife Conservation Biology, particularly in endangered species. Herein, we report a parasitism by Dipetalonema gracile Rudolphi, 1809 (Spirurida, Filarioidea, Onchocercidae), in the peritoneal cavity of a captive Marcgrave's capuchin monkey (Sapajus flavius) that died at the Wild Animal Screening Center (CETAS) of the Brazilian Institute for the Environment and Renewable Natural Resources (IBAMA) in the municipality of Cabedelo, state of Paraíba, northeastern Brazil. The necropsy revealed two filarial worms D. gracile in the abdominal cavity. Exudates, thin fibrin layers and fibrous adhesions were also present in the mesentery and spleen capsule. The mesenteric, mandibular, and tracheobronchial lymph nodes were enlarged. Multiple small nodules were seen in the spleen parenchyma. Microscopic examination of the lymph nodes and spleen revealed markedly and diffuse inflammatory reaction, with edema, plasma cells, eosinophils, histiocytes, lymphocytes and rare multinuclear giant cells, with obliteration of the normal histological architecture of the organ. This is the first report of D. gracile parasitism in Marcgrave's capuchin monkeys, a critically endangered species. Studies of this nature significantly contribute to the knowledge of the parasitic fauna of endangered species, in addition to helping to formulate conservation strategies (in situ and ex situ) and records of new hosts and new areas of occurrence of parasites.

Keywords


Conservation; Endoparasites; Filarial worms; Neotropical primates.

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DOI: http://dx.doi.org/10.5433/1679-0359.2022v43n2p883

Semina: Ciênc. Agrár.
Londrina - PR
E-ISSN 1679-0359
DOI: 10.5433 / 1679-0359
E-mail:  semina.agrarias@uel.br
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