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Positive for Gram Positive?

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Way, way back in 1928, Arthur Fleming, who was working at St. Mary’s Hospital, found a contaminant amongst his petri dishes laden with Staphylococcus aureus. It’s not unusual for microbial petri dishes to be contaminated- and we continually strive to improve our practices to insure this is not the case.  (It certainly was more prevalent in the past.)

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