an evolving pattern of human hydatid disease transmission in the united states.echinococcus granulosus infection was being acquired in the contiguous united states by virginia sharecroppers and small-holders by the turn of the century. the last recorded human infection from that general area was diagnosed in 1947. by 1920 human infections were also being acquired in the lower mississippi valley. apparently, infection in both of these areas was maintained chiefly in swine. by 1940 a third transmission area definitely existed in the central valley of california, with its res ...1977329700
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 ...19948308647
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