In this study 51 tongues from dogs used for practices at the Universidad Autónoma the Zacatecas were inspected for the presence of Trichinella spiralis, through the muscle compression and artificial digestionmethods. The presence of the parasite was found in 3 tongue indicating that trichinellosis is an important public health ploblem in Zacatecas and therefore special attention to pig inspection and proper disposal of infected meat should then be given at slaughterhouses in order to prevent the transmission of this important zoonosis.