The problem is protozoans cannot be cultured as they are obligate intracellular parasites. We do receive mice that are infected with Giardia and/or Entomebia and/or other protozoans and we are able visualize their non-cystic state with a phase-contrast microscope from intestinal/cecal contents. However, we do not stain for the cysts, nor do we collect them for any additional studies.

It would be logical to believe the cysts would eventually sink to the bottom, as it is likely their density is greater than water. However, it might not take much movement to re-suspend them. I would not rely totally upon that method.

Pete