I haven’t. Only algae, protists and the lagers cells. Even if we have a good scope, probably the best ID we could make is Gram- or Gr+ bacteria.Who here has seen bacteria they think are in a sample and are not using oil immersion?
if you're not on leica you aint seeing bacteria (in someone's home, aware labs might have other approaches though I don't know of any. it had to be oil immersion/ $1500 scope back when I was in the game at a meatpacking plant)
Labs can use DNA testing and other testing for an ID.