text_1: At what age do other doctors stop doing various screening tests?  I had an 80-year-old man yesterday who wanted a prostate specific antigen and I couldn't convince him that he didn't need one.  Also screening for high cholesterol and is there an age that you don't need to treat it anymore?  Same with Pap smears.
text_2: Patient with diarrhea.  What is Endolimax nana (on stool sample) and should you treat it?