two isolates of trichinella were obtained from the jackal, canis aureus: one from the north caspian area, the other from the south-west khuzestan area of iran. the infectivity of the isolates was tested in laboratory animals, in a wild rodent (tatera indica) and in wild pigs. the isolate from khuzestan was of low infectivity to albino rats and it was provisionally identified as trichinella nels...