Antibiotics: formerly known as antibiotics, is a metabolic product of bacteria, fungi, actinomycetes microorganisms. Can kill or inhibit pathogenic microorganisms. Now able to synthetic or semi-synthetic.
Potency by weight or International Units (IU), said:
1mg sodium penicillin = 1 667IU
K = 1 559IU penicillin 1mg
1mg polymyxin B free base = 10 000IU
Other antibiotics 1mg = 1 000IU
Antibacterial spectrum: refers to the range of drugs that inhibit or kill pathogenic microorganisms, basic clinical drug selection.
Drug resistance: refers to the susceptibility of bacteria to decrease or disappearance of the drug phenomenon, the existence of cross-resistance. It produces into natural resistance and acquired resistance two kinds.
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