Roberts M C, Smith A L
J Bacteriol. 1980 Oct;144(1):476-9. doi: 10.1128/jb.144.1.476-479.1980.
We examined 14 multiresistant and 8 ampicillin- or tetracycline-resistant Haemophilus influenzae isolates and 4 ampicillin-resistant H. parainfluenzae isolates for plasmid deoxyribonucleic acid. Sixteen strains carried plasmids. Both "plasmid-free" and plasmid-carrying isolates transferred the antibiotic resistance by conjugation. All transconjugants carried plasmid deoxyribonucleic acid, suggesting that the apparent plasmid-free strains contained R plasmids encoding for antibiotic resistance.
我们检测了14株多重耐药以及8株对氨苄西林或四环素耐药的流感嗜血杆菌分离株,还有4株对氨苄西林耐药的副流感嗜血杆菌分离株,以寻找质粒脱氧核糖核酸。16株菌株携带质粒。“无质粒”菌株和携带质粒的菌株均可通过接合作用传递抗生素耐药性。所有接合子均携带质粒脱氧核糖核酸,这表明表面上无质粒的菌株含有编码抗生素耐药性的R质粒。