it was shown experimentally that in the presence of human blood sera sensitivity of the p. mirabilis strains to benzylpenicillin , ampicillin , gentamicin , kanamycin and cephaloridin increased , the sensitivity to rifampicin varied and the sensitivity to chloramphenicol and nalidixic acid lowered .
C0030827
benzylpenicillin
C0002680
ampicillin