Definition Anti-microbial drugs: Antibiotics:substances produced by or semi-synthesized from various species of microorganisms (bacteria,fungi,and actinomycetes)that suppress the growth of other microorganisms. Synthetic antimicrobial agents,such as sulfonamides(磺胺)，quinolones(喹 诺酮)，…Definition Anti-microbial drugs: Antibiotics: substances produced by or semi-synthesized from various species of microorganisms (bacteria, fungi, and actinomycetes) that suppress the growth of other microorganisms. Synthetic antimicrobial agents, such as sulfonamides（磺胺） , quinolones（喹 诺酮） ,