Volume 72, Issue 3
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645


Hydatid disease (echinococcosis) has a two-host cycle involving the domestic dog and grazing animals. Humans are also infected by the dog. Both unilocular ( in yaks, sheep, and goats) and multilocular (alveolar) ( in hares and rodents) hydatids are common in western Sichuan in the People’s Republic of China. Humans and dogs are equally infected with both species. Many yaks () were found with multilocular cysts that visually were deemed to be However, a histologic and molecular study showed that they were actually No infective cysts were found in 125 necropsied yaks. We conclude that the yak is an inadequate and dead-end host for the sheep dog (G1) strain of and also for .


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  • Received : 11 Mar 2004
  • Accepted : 07 Jul 2004
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