Cho J J, Panopoulos N J, Schroth M N
J Bacteriol. 1975 Apr;122(1):192-8. doi: 10.1128/jb.122.1.192-198.1975.
The R factors RP1, R68 and R91 were freely transmissible to and from Pseudomonas aeruginosa, Salmonella typhimurium, and various plant pathogenic Erwinia spp. The antibiotic resistance spectrum of R+ Erwinia recipients was similar to those of other bacteria harboring these R factors, but maximum resistance levels differed with each recipient. The sponstaneous elimination of these factors from the Erwinia strains and the ability to transfer multiple antibiotic resistance suggest that these exist as plasmids in these hosts. Several, but not all, RP1-carrying Erwinia strains were sensitive to the RP1 specific phage PRR1. The R factor R18-1 was also transferred from P. aeruginosa to Erwinia spp. R18-1 was unstable in all Erwinia strains. Stable strains were isolated in which R18-1 could not be eliminated by sodium dodecyl sulfate and could not be transferred to other strains.
R 因子 RP1、R68 和 R91 可在铜绿假单胞菌、鼠伤寒沙门氏菌和各种植物致病性欧文氏菌属之间自由传递。R⁺欧文氏菌受体的抗生素抗性谱与携带这些 R 因子的其他细菌相似,但每种受体的最大抗性水平有所不同。这些因子从欧文氏菌菌株中自发消除以及转移多种抗生素抗性的能力表明它们在这些宿主中以质粒形式存在。部分(但并非全部)携带 RP1 的欧文氏菌菌株对 RP1 特异性噬菌体 PRR1 敏感。R 因子 R18 - 1 也从铜绿假单胞菌转移至欧文氏菌属。R18 - 1 在所有欧文氏菌菌株中都不稳定。分离出了稳定菌株,其中 R18 - 1 不能被十二烷基硫酸钠消除,也不能转移至其他菌株。