Delgado R, Otero J R
Servicio de Microbiología, Hospital Primero de Octubre, Madrid, Spain.
Antimicrob Agents Chemother. 1988 Oct;32(10):1598-9. doi: 10.1128/AAC.32.10.1598.
By DNA hybridization, the gene encoding dihydrofolate reductase type I was found in 58 of 59 highly trimethoprim-resistant clinical isolates of Shigella sonnei obtained from 1981 through 1987 in Madrid, Spain. No strain harbored the type II gene. In selected strains, the type I gene was demonstrated to be in a plasmid.
通过DNA杂交技术,在1981年至1987年从西班牙马德里获得的59株高度耐甲氧苄啶的宋内志贺氏菌临床分离株中,有58株发现了编码I型二氢叶酸还原酶的基因。没有菌株携带II型基因。在选定的菌株中,I型基因被证明存在于质粒中。