The authors describe an unusual case report of bleeding into digestive tube cause by colonization with Ascaris lumbricoides parasite. The patient was examined in the 11th Field Hospital of the Army of Czech Republic during the IFAF mission in Afghanistan. The course of the disease is described and possible complications caused by the presence of roundworm in the human digestive tract are discussed.

        Key words: Ascaris lumbricoides – roundworm – bleeding into GIT – albendazol