Confirmed that the remaining MYPGP batch of agar also had the same contamination issue after viewing a sample of the plates incubated at 37C overnight. I am not 100% sure that the new batch of MYPGP agar is also free of contamination. The plates that were incubated at 37C appeared to be contamination free, however the plates incubated at 37C 5%CO2 appeared to have a thin layer of bacteria on it...
To confirm that the new batch of MYPGP agar is free of contaminants, two plates were incubated at 37C 5%CO2 (one inverted and the other not). I will continue to monitor the plates tomorrow after 24 hours incubation.
//EWW
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