Trichinellosis is a zoonotic parasitic disease produced by the nematode Trichinella Spiralis that is transmitted by carnivorism; The pig / man cycle is the one with the highest epidemiological importance. The clinical diagnosis of trichinellosis in animals is very difficult due to the absence of manifestations, however, there are direct and indirect methods of diagnosis. The first ones are based on the finding of Trichinella spiralis larvae in pig muscle tissue and the second ones are based on the detection of the humoral or cellular immune response in the host. The present review will explain the methods of diagnosis of trichinellosis and their effectiveness in diagnosis.