Fil: Winter, Marina. Universidad Nacional de Río Negro, Sede Atlántica; ArgentinaFil: Winter, Marina. Centro de Investigaciones y Transferencia Río Negro (CONICET-UNRN); ArgentinaFil: Pasqualetti, Mariana I. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias; ArgentinaFil: Pasqualetti, Mariana I. Instituto de Investigaciones en Producción Animal (INPA); ArgentinaFil: Pasqualetti, Mariana I. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fariña, Fernando A. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias; ArgentinaFil: Fariña, Fernando A. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Fariña, Fernando A. Instituto de Investigaciones en Producción Animal (INPA); ArgentinaFil: Ercole, Mariano E. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias; ArgentinaFil: Failla, Mauricio. Proyecto Patagonia Noreste; ArgentinaFil: Failla, Mauricio. Museo Provincial Patagónico de Ciencias Naturales Juan Carlos Salgado; ArgentinaFil: Perello, Mario C. Fundación Félix de Azara; ArgentinaFil: Birochio, Diego E. Universidad Nacional de Río Negro, Sede Atlántica; ArgentinaFil: Birochio, Diego E. Centro de Investigaciones y Transferencia Río Negro; ArgentinaFil: Abate, Sergio D. Universidad Nacional de Río Negro, Sede Atlántica; ArgentinaFil: Abate, Sergio D. Centro de Investigaciones y Transferencia; ArgentinaFil: Soricetti, Mariano. Universidad Nacional de Río Negro, Sede Atlántica; ArgentinaFil: Soricetti, Mariano. Centro de Investigaciones y Transferencia; ArgentinaFil: Ribicich, Mabel M. Universidad de Buenos Aires. Facultad de Ciencias Veterinarias. Cátedra de Parasitología y Enfermedades Parasitarias; ArgentinaFil: Ribicich, Mabel M. Instituto de Investigaciones en Producción Animal (INPA); ArgentinaFil: Ribicich, Mabel M. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaTrichinellosis is a food-borne parasitic disease produced by different nematodes of the genus Trichinella. In Argentina, it is an endemic zoonosis and an important public health problem. The infection has been detected in domestic and wild animals. Trichinella spp. muscle larvae have anaerobic metabolism, which allows their survival in decaying tissues. The aim of this study was to evaluate the presence of Trichinella spp. in carnivorous and/or scavenger wild vertebrates - birds, mammals and reptiles - in northeastern Argentine Patagonia. Skeletal muscle samples from 141 animals, which were found killed on northeastern Argentine Patagonia roads, were analyzed by the artificial digestion method. None of the 141 samples were positive for larvae of Trichinella. These results suggest that Trichinella does not use these species to complete its cycle in this region of the continent and the absence of a significant alteration in the study area makes it difficult to transmit parasitic diseases. However, due to the limited number of samples assessed for some species, this could not be confirmed. The relevance of this study resides in the fact that it is the first systematic study in South America that considers birds, reptiles and mammals as potential hosts for Trichinella.trueTrichinellosis is a food-borne parasitic disease produced by different nematodes of the genus Trichinella. In Argentina, it is an endemic zoonosis and an important public health problem. The infection has been detected in domestic and wild animals. Trichinella spp. muscle larvae have anaerobic metabolism, which allows their survival in decaying tissues. The aim of this study was to evaluate the presence of Trichinella spp. in carnivorous and/or scavenger wild vertebrates - birds, mammals and reptiles - in northeastern Argentine Patagonia. Skeletal muscle samples from 141 animals, which were found killed on northeastern Argentine Patagonia roads, were analyzed by the artificial digestion method. None of the 141 samples were positive for larvae of Trichinella. These results suggest that Trichinella does not use these species to complete its cycle in this region of the continent and the absence of a significant alteration in the study area makes it difficult to transmit parasitic diseases. However, due to the limited number of samples assessed for some species, this could not be confirmed. The relevance of this study resides in the fact that it is the first systematic study in South America that considers birds, reptiles and mammals as potential hosts for Trichinella.