1921
Volume s1-30, Issue 5
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645

Abstract

Summary

  • 1.  The effects of various amounts of rice powder were studied on the growth of 3 strains of cultured with a mixed bacterial flora.
  • 2.  The addition of rice flour increased the amount and duration of amebic growth.
  • 3.  The length of survival of the ameba cultures was directly related to the rice flour content of the medium.
  • 4.  There was an optimal amount of rice powder for the most abundant growth of amebae.
  • 5.  In cultures containing the largest amounts of rice powder, the lag phase of amebic growth was prolonged and there was a relative depression of the fold increase of the populations and in the rates of multiplication.
  • 6.  The addition of rice powder produced no gross changes in the bacterial flora growing with each strain.
  • 7.  Within 48 hours after inoculation, there was a fall in the pH of the cultures containing the largest amounts of rice.
  • 8.  Amebic growth accelerated the disintegration of rice particles into granules and the disappearance of the latter from the culture medium.

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