<s>[INST] A friend of mine was admitted to hospital after he blacked out and three weeks later after having shoulder surgery contacted a staph infection thatthey found in the stool.  They think he may have contacted this in  emergency.  What caused this andnothing is clearing it up.  He is 78  62 and in goodhealth outside of this blackout which they have diagonsed  as syncope?  Very frustrating. [/INST] Hello and thanks for posting. Sorry to hear about your friend. As far as the infection is concerned, we do not always have the answers why certain infections are found in the intestinal tract. There are many reasons (one of them certainly being in hospitals as you have alluded to). Since you state that he is still having problems with the staph infection, please make sure this gets ad Chat Doctor. Best of luck to your friend. </s>