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



  • 1.  A modification of the zinc sulfate centrifugal flotation technique is described for concentrating cysts of and from stools and cultures in watch glasses with minimum amounts of foreign material.
  • 2.  Several strains of have been cultivated from cysts that were freed by microisolation from bacteria and transferred into riced whole egg medium that was seeded with organism and .
  • 3.  Encystation of was obtained by the method of Dobell in cultures with an undetermined number of species of bacteria and also with only three species, organism and .
  • 4.  On the basis of culturability and microscopic appearance the cysts of were not demonstrably affected by drying; cysts of were irreversibly damaged by drying.


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