the reversal of the antibacterial activity of trimethoprim against different species of gram-positive cocci ( staphylococcus aureus , staph . epidermidis , staph . saprophyticus , group b streptococci , streptococcus faecalis and str . faecium ) by thymine , thymidine and various 'folates ' ( folate , folinate , dihydrofolate and tetrahydrofolate ) was tested .
C0041041
trimethoprim
C0038160
staph