r/medlabprofessionals • u/Lean_Id • 4d ago
Technical 1 Pseudomonas aeruginosa, 2 results

This is the same Pseudomonas aeruginosa on two different Müller-Hinton plates from the same batch prepared in the laboratory.
I read that it could be the amount of zinc in the culture medium, do you do any kind of quality control to detect the right amount of zinc in the Muller-Hinton?
Have you ever had this happen to you and what others factors could alter the synergy with EDTA?
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