This paper reports the gross and histopathological analysis of a specimen of the sea turtle Eretmochelys imbricata found stranded on the beach on the coast of the state of São Paulo, Brazil. The macroscopic findings revealed blackish nodules in the duodenal serous membrane measuring 1-2 mm in diameter. The cut revealed the presence of eggs from the family Spirorchiidae. The histological analysis revealed lesions stemming from the presence of eggs in the serous membrane of the intestine, lungs, heart and liver. Only one specimen of the species Amphiorchis caborojoensis was found in the heart. Although in this case it was not possible to determinate whether the parasite was the cause of the host death, it is likely that injures have contributed to a worsening of the animal clinical state and consequently its stranding on the beach.
KEY WORDS: Brazil, Eretmochelys imbricata, Spirorchiidae, Sea turtles.