(一)金霉素与地霉素金霉素(Aureomycin)与地霉素(Terramy-cin)都是继青霉素,链霉素及氯霉素之后而发现的重要抗生素,它们不但在体外,体内对多种革兰氏阴性及阳性细菌都有很强的抑制作用,而且对立克次氏体及滤过病毒也有抑制的效能,它们的毒性和副作用都很低,口服或注射都 (A) Chlortetracycline and Gemcitabine Aureomycin and Terramy-cin are all important antibiotics found after penicillin, streptomycin and chloramphenicol. They are not only found in vitro and in vivo On a variety of Gram-negative and positive bacteria have a strong inhibitory effect, but also against rickettsia and filtration virus also has the effect of inhibition, their toxicity and side effects are very low, both oral and injectable