Staphalococcus Oxacillin resistance is best detected by?
Cefotixin MIC
Cefotixin disc diffusion
Oxacillin disc diffusion
Oxacillin agar
Ans. is 'b' i.e., Cefotixin disc diffusionOxacillin (also methicillin) resistance is detected by finding the presence of mec A gene."Cefoxitin disc diffusion has been repoed to more occurately predict mec A gene presence than oxacillin disc diffusion."The use of cefoxitin MIC test has not been recommended by the CLSI-AST (Clinical and Laboratory Standards Institute), but its presence is equivalent to cefoxitin disc diffusion.