question: what are the signs of MRSA pneumonia?  My 17yr old has a cough with phlegm and she says sometimes there is a small dot of red blood in her phlegm.  She is otherwise healthy, and functioning normally, except with this chronic wet cough.  Coincidently, my 19yr old is being treated for MRSA, diagnosed last week, characterized with facial boils.  Could my 17yr old have caught it but it manifested itself in her lungs instead of skin?