| epidemiology of an endemic strain of beta-lactamase-producing enterococcus faecalis. | three previously reported beta-lactamase-producing (bla+) enterococci with distinct but related antibiotic resistance phenotypes, plasmid profiles, and plasmid restriction endonuclease digestion patterns were isolated at the west haven veterans administration medical center in connecticut (wh245, wh257, wh571) in july 1986 and march 1987. in this study, we analyzed the whole-cell dna of these isolates by using pulsed-field gel electrophoresis of large chromosomal fragments generated by smai dige ... | 1991 | 1774257 |
| evidence for clonal spread of a single strain of beta-lactamase-producing enterococcus (streptococcus) faecalis to six hospitals in five states. | beta-lactamase-producing (bla+) enterococci have been reported in three state and two countries. pulsed-field gel electrophoresis was used to compare 14 bla+ enterococcus (streptococcus) faecalis isolated from hospitalized patients in seven states and three continents. the restriction endonuclease digestion patterns of isolates from connecticut, massachusetts, lebanon, and argentina were all markedly different, indicating that these were different strains. however, isolates from delaware, texas, ... | 1991 | 1901330 |
| molecular epidemiology of beta-lactamase-producing enterococci. | plasmids from the first six reported beta-lactamase-producing (bla+) enterococci were compared for genetic relatedness. bla+ enterococcal plasmids from strains isolated in houston, tex.; philadelphia, pa.; connecticut; and pittsburgh, pa., had heterogeneous haeiii and mspi-clai restriction endonuclease digestion patterns. a staphylococcal beta-lactamase probe hybridized to all six bla+ enterococcal plasmids, but hybridization was detected on different haeiii and mspi-clai fragments of the six pl ... | 1990 | 2109577 |