Hi!

I'm trying to produce paraffin sections showing intestinal bacteria in intestinal tissue sections. We have tried routine PFA fixation and paraffin processing, and a Carnoy-based protocol supposedly optimized for this purpose. The problem is, the bacteria seem to shrink so much that I can't see any nice shapes but only very tiny roughly circular objects. What to do?

With best regards,
Mikael Niku, University of Helsinki

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