several clinical isolates and o-antigen reference strains of serratia marcescens were shown to yield spontaneously phenotypic variants with nonspecific , combined resistance or decreased susceptibility for chloramphenicol , nalidixic acid , nitrofurantoin , sulfonamides , and trimethoprim , including cotrimoxazole .
C0041041
trimethoprim
C0041044
cotrimoxazole