Antimicrobial Susceptibility of Salmonella Typhimurium Carrying the Outer Membrane Permeability Mutation SS-B
Overview
Authors
Affiliations
The antibiotic susceptibility profile of Salmonella typhimurium SS-B, a mutant susceptible to some antimicrobial agents, was studied in detail. Twenty-eight agents were tested, and eleven of these had MICs significantly lower (32- to greater than 250-fold) for the SS-B strain than for its parent. The drugs were generally hydrophobic or amphiphilic. Polymyxin B nonapeptide, which has a known outer membrane permeabilizing action, further reduced the MIC of several of these agents for the SS-B strain by a factor of approximately 10 to 30. In most cases, the resulting MICs were lower than the corresponding MICs for the parent strain grown in the presence of polymyxin B nonapeptide. In addition, the hydrophobic fluorescent probe N-phenyl naphthylamine was rapidly embedded in the membranes of the SS-B strain but was poorly embedded in those of the parent strain.
The Effect of Mutation in Lipopolysaccharide Biosynthesis on Bacterial Fitness.
Nagy L, Urban P, Makszin L, Sandor V, Kilar A, Abraham H Cells. 2022; 11(20).
PMID: 36291117 PMC: 9600226. DOI: 10.3390/cells11203249.
Morici P, Florio W, Rizzato C, Ghelardi E, Tavanti A, Rossolini G Eur J Clin Microbiol Infect Dis. 2017; 36(10):1739-1748.
PMID: 28470337 DOI: 10.1007/s10096-017-2987-7.
Construction and characterization of an Escherichia coli mutant producing Kdo₂-lipid A.
Wang J, Ma W, Wang Z, Li Y, Wang X Mar Drugs. 2014; 12(3):1495-511.
PMID: 24633251 PMC: 3967223. DOI: 10.3390/md12031495.
Engels C, Schieber A, Ganzle M Appl Environ Microbiol. 2011; 77(7):2215-23.
PMID: 21317249 PMC: 3067452. DOI: 10.1128/AEM.02521-10.
Vaara M, Nurminen M Antimicrob Agents Chemother. 1999; 43(6):1459-62.
PMID: 10348770 PMC: 89296. DOI: 10.1128/AAC.43.6.1459.