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  1. Balantidium coli is passed intermittently and once outside the colon is rapidly destroyed. Thus stool specimens should be collected repeatedly, and immediately examined or preserved to enhance detection of the parasite; concentration via sedimentation or flotation can increase the probability of recovery.

  2. Aug 15, 2012 · The vegetative stage resistant to environmental factors, such as stomach acid and chlorine, is now known as the cyst stage (Fig. 7). Biologists now use high-powered electron microscopes to see details of bacteria and protozoans magnifying more than a million times their molecular motors, and the machinery of the cell more amazing than ...

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