TABLE 1.
Results of biochemical, growth, and genetic assays with mecA-harboring isolatesa
| Identity of mecA-containing isolates (nb) | Test result
|
||||||
|---|---|---|---|---|---|---|---|
| Biochemical test
|
Growth/appearance on diagnostic mediumc
|
Species-specific PCR analysisd
|
|||||
| Gram stain | Catalase | Swarming | mEI | Slanetz and Bartley | P. vulgaris | E. faecalis | |
| P. vulgaris (18) | − | + | + | − | − | + | − |
| M. morganii (4) | − | + | − | − | − | +/−e | − |
| E. faecalis (3) | + | − | − | + | + | − | + |
a
Preidentified strains of Proteus vulgaris (ATCC 6896), Morganella morganii (NRRL B-1663), and Enterococcus faecalis (ATCC 29212) were used as controls in each assay. +, positive result; −, negative result, +/−, intermediate result.
b
n, no. of isolates.
c
mEI (BD Diagnostics) and Slanetz and Bartley (Oxoid) media are differential and selective for Enterococcus spp.
e
Isolates of M. morganella exhibited a weak PCR signal.