the highly celbenin-resistant cultures isolated from penicillin-destroying staphylococci were in sharp contrast to those from penicillin-sensitive strains , as well as to penicillin g-tolerant staphylococci isolated in vitro , because they retained the cultural characteristics , coagulase and haemolytic activity , and mouse virulence of the parent strains , and the degree of resistance remained stable after repeated passage in the absence of celbenin .
C0030842
penicillin
C0030827
penicillin g