Direct action on bacterial cells
Antibiotics can selectively act on specific parts of the cell's DNA, RNA, and protein synthesis systems, interfere with cellular metabolism, interfere with life activities or stop growth, and even die. And unlike ordinary non-selective disinfectants or bactericides.
Selective antibiotic spectrum
The role of antibiotics is selective, and different antibiotics have different effects on different pathogens. The type of pathogen that is sensitive to an antibiotic is called the antibiotic spectrum (antibacterial spectrum) of the antibiotic.
Antibiotics are a physiologically active substance. Various antibiotics generally act on pathogenic bacteria at very low concentrations, which is another major feature of antibiotics that distinguish them from other chemical germicides. The effective concentration of various antibiotics for different microorganisms varies, and the antibacterial strength of antibiotics is usually defined as the lowest concentration that inhibits the growth of microorganisms, and is abbreviated as the effective concentration. The lower the effective concentration, the stronger the antibacterial effect.