Jorgensen S T, Poulsen A L
Antimicrob Agents Chemother. 1976 Jan;9(1):6-10. doi: 10.1128/AAC.9.1.6.
A total of 359 hemolytic Escherichia coli strains, representing eight pig pathogenic serotypes and isolated from pigs with enteric disease, was tested for transferable resistance to eight antibiotics. The co-transfer of plasmids controlling hemolysin production (Hly) with antibiotic resistance plasmids (R-factors) was evaluated. Transferable resistance to tetracycline, streptomycin, and/or sulfonamides was found in 47% of the total number of strains and 80% of the resistant ones. Chloramphenicol resistance was seldom seen. Co-transfer of Hly with R-factors occurred in 22.5% of the strains, generally to a degree excluding a genetic linkage. Stable coexistence of two R-factors in a cell was indicated by transfer patterns in 29 of the strains.
从患有肠道疾病的猪中分离出总共359株溶血性大肠杆菌菌株,它们代表8种猪致病性血清型,并对8种抗生素的可转移耐药性进行了检测。评估了控制溶血素产生(Hly)的质粒与抗生素耐药性质粒(R因子)的共同转移情况。在菌株总数的47%以及耐药菌株的80%中发现了对四环素、链霉素和/或磺胺类药物的可转移耐药性。很少见到氯霉素耐药性。Hly与R因子的共同转移发生在22.5%的菌株中,一般程度上排除了遗传连锁关系。29株菌株的转移模式表明细胞中两个R因子能稳定共存。