Volume 8, Issue 1
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



  • 1.  White mice 48 days of age or younger at time of inoculation were highly susceptible to an initial infection with scolices of when the latter were given intraperitoneally.
  • 2.  Mice 71 days of age or older were relatively resistant to an initial infection under similar conditions.
  • 3.  Four mice which were unweaned at time of inoculation died on the 10th and 11th days postinfection.
  • 4.  The few cysts which developed in older mice were often larger than any which developed in younger counterparts. The possibility of an ecological “crowding effect” is suggested.
  • 5.  The difference in susceptibility to infection appeared to be related to the magnitude of the host's cellular response.
  • 6.  The development of hydratid cysts from scolices is described.


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