Produção Nacional
Revisado por pares
Toxoplasma gondii in cetaceans of Brazil: a histopathological and immunohistochemical survey
2019; Colégio Brasileiro de Parasitologia Veterinaria; Volume: 28; Issue: 3 Linguagem: Inglês
10.1590/s1984-29612019051
ISSN1984-2961
AutoresSamira Costa‐Silva, Carlos Sacristán, Omar Gonzales‐Viera, Josué Díaz‐Delgado, Angélica María Sánchez‐Sarmiento, Juliana Marigo, Kátia R. Groch, Vítor Luz Carvalho, Ana Carolina Ewbank, Adriana Castaldo Colosio, Milton C. C. Marcondes, Ana Carolina Oliveira de Meirelles, Carolina P. Bertozzi, José Lailson‐Brito, Alexandre de Freitas Azevedo, Valéria Ruoppolo, Larissa Rosa de Oliveira, Philipp Sebastian Ott, José Luiz Catão‐Dias,
Tópico(s)Travel-related health issues
ResumoAbstract Toxoplasmosis is a parasitic disease caused by the protozoan Toxoplasma gondii. In cetaceans, T. gondii infection is a significant cause of morbidity and mortality. Despite the worldwide range and broad cetacean host record of T. gondii infection, there is limited information on toxoplasmosis in cetaceans from the Southern hemisphere. We investigated the occurrence of T. gondii by histopathology and immunohistochemistry in tissue samples of 185 animals comprising 20 different cetacean species from Brazil. Three out of 185 (1.6%) animals presented T. gondii-associated lesions: a captive killer whale Orcinus orca, a free-ranging common bottlenose dolphin Tursiops truncatus and a free-ranging Guiana dolphin Sotalia guianensis. The main lesions observed in these animals were necrotizing hepatitis, adrenalitis and lymphadenitis associated with protozoal cysts or extracellular tachyzoites presenting immunolabeling with anti-T. gondii antibodies. This study widens the spectrum of species and the geographic range of this agent in Brazil, and provides the first reports of T. gondii infection in a captive killer whale and in a free-ranging common bottlenose dolphin in South America.
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