Analysis of PBP5 of early U.S. isolates of Enterococcus faecium: sequence variation alone does not explain increasing ampicillin resistance over time. Academic Article

abstract

• Recent studies have shown that ampicillin resistance has increased steadily over the past 3 decades within U.S. Enterococcus faecium isolates. Analysis of the predicted PBP5 protein of 41 isolates showed a consensus PBP5 pattern for the 9 isolates with MICs of <4 g/ml that is distinctly different from the PBP5 consensus of the 32 isolates with MICs of >4 g/ml with 5% difference between these; however, there were no consistent amino acid changes that correlated with specific increases in the MICs of ampicillin within the latter group. Analysis of three other genes encoding cell wall/surface proteins also showed that there are two distinct evolutionary groups for each gene, but with occasional mixing of genes, consistent with a species that evolves by recombination.

authors

• Galloway-Pena, Jessica

published proceedings

• Antimicrob Agents Chemother

altmetric score

• 0.5

author list (cited authors)

• Galloway-Pea, J. R., Rice, L. B., & Murray, B. E.

citation count

• 61

complete list of authors

• Galloway-Peña, Jessica R||Rice, Louis B||Murray, Barbara E

publication date

• July 2011

publisher

• American Society for Microbiology  Publisher

published in

• Antimicrobial Agents and Chemotherapy  Journal

keywords

• Ampicillin
• Ampicillin Resistance
• Bacterial Proteins
• Enterococcus Faecium
• Microbial Sensitivity Tests
• Penicillin-binding Proteins
• Phylogeny
• Polymerase Chain Reaction

Digital Object Identifier (DOI)

• 10.1128/AAC.00099-11

start page

• 3272

end page

• 3277

volume

• 55

issue

• 7

URL

• http://dx.doi.org/10.1128/aac.00099-11