TABLE 1.
Error rates for BD PHX AST compared to BMD MICs for ampicillin and narrow-spectrum cephalosporins in E. coli
| Antibiotic | Error rate (%) for:
|
||
|---|---|---|---|
| Very major errorsa | Major errorsb | Minor errorsc | |
| Ampicillin | 0 (0/112) | 0 (0/112) | NA |
| Cefazolin | 3 (1/35) | 1 (2/183) | 6 (14/225) |
| Cephalothin | 9 (9/101) | 0 (0/36) | 42 (95/225) |
| Cephalexin | 0 (0/27) | 1 (2/159) | 15 (34/225) |
a
The very major error rate is the number of isolates that were susceptible by PHX/number of isolates that were resistant by BMD (the numbers used to calculate the error rate are shown in parentheses).
b
The major error rate is the number of isolates that were resistant by PHX/number of isolates that were susceptible by BMD (the numbers used to calculate the error rate are shown in parentheses).
c
The minor error rate is the number of isolates that were susceptible or resistant by either method (PHX or BMD)/total number of isolates (the numbers used to calculate the error rate are shown in parentheses). NA, not available for analysis.