Addition of NaCl to MS-2 system clinical cuvettes for combined salt tolerance and susceptibility testing for group D streptococci

Sodium chloride was added directly to individual wells of MS-2 system clinical cuvettes for evaluating the feasibility of simultaneous susceptibility and salt tolerance testing for group D streptococcal isolates. Salt tolerance was correctly detected for all 177 enterococci tested; there was no false-positive results for 29 group D nonenterococcal or 45 viridans streptococcal isolates.