Zoonotic nematode in the city of La Plata, Argentina: Report of a case of Calodium hepaticum in Rattus rattus ...

• Main Authors: Steffen, Kevin Denis, Basset, Carina, Arias, Rubén Omar, Moré, Gastón, Robles, María del Rosario, Unzaga, Juan Manuel
• Format: Text
• Language: unknown
• Published: Elsevier 2024
• Subjects: 630 Agriculture; 590 Animals Zoology; Argentina; Rattus rattus
• Online Access: https://dx.doi.org/10.48350/191039; https://boris.unibe.ch/191039/

This study describes a case of Calodium hepaticum (Trichinellida: Capillariidae) infection in an adult rat (Rattus rattus) from the periurban area of the city of La Plata in the province of Buenos Aires, Argentina. The rat was found with neurological signs (ataxia, lethargy, and episodes of unresponsiveness) in the food storage of a goat production facility. The liver was observed with hepatomegaly and diffuse and irregular yellowish-white spots appearing in striae or small nodules on the external surface and inside the liver. Subsequent microscopic and histopathological studies were performed. Eggs were observed by direct microscopy of the impression smear of liver tissue. A multifocal granulomatous tissue reaction with different stages of fibrocellular tissue was observed in the liver parenchyma. The granulomas contained adults and degenerated eggs delimited by an intense infiltrate of mononuclear cells. Macro and microscopic observations and histopathological liver lesions were compatible with C. ...