| echinococcus granulosus (taeniidae) and autochthonous echinococcosis in a north american horse. | we report the first documented case of autochthonous echinococcosis in a horse of north american origin. three fully mature and viable unilocular hydatid cysts of echinococcus granulosus (batsch, 1786) were an incidental finding at necropsy in the liver of a 14-yr-old gelding thoroughbred that had been foaled in virginia and raised in maryland. protoscolices were armed with 2 rows of 28-37 rostellar hooks; small hooks measured 23-30 microns; large hooks measured 26-33 microns. morphologically, t ... | 1994 | 8308647 |