I have a query about carabcillin antibiotics is good option to put it in ypd agar for growing yeast or is it possible to grow them without antibiotic?

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Robert Adolf Brinzer

You can grow yeast without antibiotics if your sterile technique is good but they are often also used to maintain plasmids with selective markers.

Phil Geis

If you've a pure culture, there's no need for antibiotics. For isolation of a yeast like fungus from mixed culture, carabcillin (assume carbenicillin) is ok but reportedly not so great vs. Gram + bacteria.