氨苄青霉素(Ampicillin,BRL 1341)为一广谱半合成青霉素。国外商品名为Penbritin。对固紫染色阴性菌和阳性菌具有抑制和杀灭作用。本品的抗菌谱与青霉素G相似,抗阴性菌的作用较强,特别对大肠杆菌、流感杆菌、沙门氏菌、志贺氏菌和一些变形杆菌有效,但其作用仍不及卡那霉素、庆大霉素和多粘菌素,对绿脓杆菌无效。它能被 Ampicillin (BRL 1341) is a broad spectrum of semi-synthetic penicillins. Foreign trade name Penbritin. On the solid purple stain negative bacteria and positive bacteria have inhibitory and killing effect. The antibacterial spectrum of this product is similar to that of penicillin G, and its anti-negative bacterium has stronger effect, especially to Escherichia coli, Influenza bacillus, Salmonella, Shigella and some Proteus, but its effect is still lower than that of kanamycin. Mycin and polymyxin, Pseudomonas aeruginosa is invalid. It can be