Concept 2: 上游充通大学 Bacteriostatic vs.Bactericide Shanghai Jiao Tong University Antibiotics differ by mode of action ©Bacteriostatic: arrest the growth or replication of the microorganism. Sulfanilamide ©Bactericide: The agents which can kill the microorganisms are called bactericidal drugs;a drug may be bacteriostatic for one organism but bactericidal for another. Fluoroquinolones,Penicillins,..Shanghai Jiao Tong University Concept 2: Bacteriostatic vs. Bactericide Antibiotics differ by mode of action Bacteriostatic: arrest the growth or replication of the microorganism. Sulfanilamide Bactericide: The agents which can kill the microorganisms are called bactericidal drugs; a drug may be bacteriostatic for one organism but bactericidal for another. Fluoroquinolones, Penicillins, …