Toxoplasmosis in a Guiana dolphin (Sotalia guianensis) from Paraná, Brazil

• Autor(a) principal: Gonzáles-Viera, Omar Antonio
• Data de Publicação: 2013
• Outros Autores: Marigo, Juliana, Ruoppolo, Valéria, Weber Rosas, Fernando Cesar, Kanamura, Cristina Takami, Takakura, Cleusa Fumica Hirata, Fernandez, A., Catão-Dias, José Luiz
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional do INPA
• Texto Completo: https://repositorio.inpa.gov.br/handle/1/16079
• topic: Organochlorine Derivative; Animals Tissue; Arteritis; Brasil; Cell Infiltration; Controlled Study; Dolphin; Encephalitis; Female; Guiana Dolphin; Hepatitis; Immunohistochemistry; Interstitial Pneumonia; Measles Virus; Mononuclear Cell; Nonhuman; Parasite Transmission; Tachyzoite; Tissue Necrosis; Toxoplasma Gondii; Toxoplasmosis; Animal; Brasil; Dolphins; Female; Toxoplasma; Toxoplasmosis, Animals; Animalsia; Felidae; Morbillivirus; Sotalia; Sotalia Guianensis; Toxoplasma Gondii

This study describes toxoplasmosis in a by caught Guiana dolphin (Sotalia guinensis) from Paranaguá Bay, Paraná, Brazil. Interstitial pneumonia, multisystemic arteritis, multifocal adrenalitis and hepatitis were the primary lesions observed. These tissues had moderate to severe necrosis and mononuclear cells infiltration usually surrounded by tachyzoites and tissue cysts. Moderate lymphoid depletion was evident in the spleen. Toxoplasma gondii was positive by immunohistochemical and ultrastructural evaluation. Furthermore, the animal was negative for Morbillivirus by immunohistochemistry and had low levels of persistent organochlorines. There is evidence of environmental changes in the Paranaguá Bay that could justify the occurrence of toxoplasmosis in Guiana dolphin. The sewage run-off from main urban areas and the presence of domestic and wild felids in areas surrounding the bay could be a source of T gondii oocysts from land to sea. Based on its habitat, the authors recommend this dolphin species as sentinels for the health of bays and estuaries where they occur. © 2012.