Hello everyone. I have a doubt. I have 2 kinds of culture in 1 Petri plate (SBAgar and McConkey), so, I have S. aureus growing in the SBA and something else growing in the McC (I'm still waiting for the results of the biochemicals tests), my question is; which bacteria is the reason of the infection? btw: i don't know what kind of specimen were used to do this culture.