Abstract
A prospective review of all enterococcal isolates for 13 months showed that 9.0% were resistant to ampicillin (MIC, greater than or equal to 16 micrograms/ml; zone diameter, less than 15 mm), as determined by the Vitek system, disk diffusion, microdilution MIC testing, and macrodilution MIC testing. All were beta-lactamase negative. A total of 19 and 3 resistant isolates were from urine and intravascular sites, respectively. Ampicillin-resistant enterococci appear to be a growing clinical problem.
MeSH Terms
Adult
Aged
Aged, 80 and over
Ampicillin Resistance/physiology
Cross Infection/microbiology
Drug Resistance, Microbial
Female
Gentamicins/pharmacology
Humans
Male
Microbial Sensitivity Tests
Microbiological Techniques
Middle Aged
Streptococcal Infections/drug therapy
Streptococcus/drug effects,physiology
beta-Lactamases/biosynthesis
Chemicals
Gentamicins
beta-Lactamases
Authors & Affiliations
5 authors, click to expand affiliations / ORCID
Oster S E
Medical Service, Veterans Administration Medical Center, Martinez, California 94553.
Chirurgi V A
Goldberg A A
Aiken S
McCabe R E
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