Answers are grounded in this paper and cite their sources.
One hundred and ninety-five Gram-positive bacteria representing 17 species were tested for susceptibility to daptomycin by broth microdilution and Etest methods. The geometric mean daptomycin MIC was 0.46 mg/L by broth microdilution tests and 0.73 mg/L by Etest. The concentration of calcium in 12 different batches of agar varied from 4 to 36 mg/L. Daptomycin Etest MICs varied inversely with the calcium concentration. Etest daptomycin MICs for quality control strains were within proposed quality control range on media with >20 mg/L of calcium. Monitoring the calcium levels of agar media by testing appropriate quality control strains is important for daptomycin Etests.
No takes yet. Share an insight, caveat, or question.
Peter Fuchs (2001) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: