Dutta G N, Devriese L A
Appl Environ Microbiol. 1982 Oct;44(4):832-7. doi: 10.1128/aem.44.4.832-837.1982.
The minimal inhibitory concentrations of nine growth-promoting agents were determined by an agar-dilution method against 66 bile-tolerant streptococcal (8 Streptococcus faecalis, 23 Streptococcus faecalis subsp. liquefaciens, 15 Streptococcus faecium, and 20 carboxyphilic streptococci) strains isolated from the ceca of 52 chickens on 19 farms. Avoparcin was equally active on all groups. The natural susceptibilities against the other substances differed among the groups studied. Bacitracin and virginiamycin were more active on S. faecium and S. faecalis than on S. faecalis subsp. liquefaciens; lincomycin and the macrolide antibiotics were more active on S. faecium than on the other groups; and flavomycin was active on all groups except S. faecium. High percentages of acquired resistance were noted in all groups against bacitracin, lincomycin, and the macrolide antibiotics, oleandomycin, spiramycin, and tylosin. Resistance to nitrovin was found only among the S. faecalis and S. faecium groups.
采用琼脂稀释法测定了9种促生长剂对从19个养殖场的52只鸡盲肠中分离出的66株耐胆汁链球菌(8株粪链球菌、23株液化粪链球菌亚种、15株屎肠球菌和20株嗜二氧化碳链球菌)的最低抑菌浓度。阿伏霉素对所有组的活性相同。在所研究的组中,对其他物质的天然敏感性有所不同。杆菌肽和维吉尼亚霉素对屎肠球菌和粪链球菌的活性比对液化粪链球菌亚种的活性更高;林可霉素和大环内酯类抗生素对屎肠球菌的活性比对其他组的活性更高;黄霉素对除屎肠球菌外的所有组均有活性。所有组对杆菌肽、林可霉素和大环内酯类抗生素、竹桃霉素、螺旋霉素和泰乐菌素均有较高比例的获得性耐药。仅在粪链球菌和屎肠球菌组中发现对硝呋烯腙的耐药性。