Oh yes , the culture results come piecemeal and can be alarming. I'm not expert but my sputum results often show those Gram positive and Gram negative items. (Positive ones are normal resp flora.) I have had stentotrophamonas and a fungus of some kind aa well as MAC, but have never been treated for anything but the MAC. .. so have stopped worrying about the results (except for the MAC culture!) Certainly ask Dr Daley but these are not necessarily cause for concern. ...