Quality control and interpretive criteria for the azlocillin disk diffusion susceptibility test.
The standardized disk diffusion test was performed with 75-micrograms azlocillin disks to determine individual test, accuracy, and precision control values with Escherichia coli ATCC 25922, Pseudomonas aeruginosa ATCC 27853, and Staphylococcus aureus ATCC 25923. In addition, regression lines for correlating inhibitory zone diameters with the 75-micrograms azlocillin disk and azlocillin minimal inhibitory concentrations were calculated for gram-negative clinical isolates (including Enterobacteriaceae, P. Aeruginosa, other nonfermenters, and Aeromonas hydrophila). Criteria for distinguishing susceptible isolates from resistant isolates, based on an error-rate bound classification scheme, are proposed.[1]References
- Quality control and interpretive criteria for the azlocillin disk diffusion susceptibility test. Fass, R.J. Antimicrob. Agents Chemother. (1982) [Pubmed]
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