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Table 6 Antimicrobial susceptibility testing of streptococci/enterococci from positive blood cultures by PR1 (A)a or PR2 (B)a

From: A new rapid method for direct antimicrobial susceptibility testing of bacteria from positive blood cultures

Antimicrobial agent No. of very major errors No. of major errors No. of minor errors AST Agreement Total
A
Ampicillin (AMP) 1/5 (20 %) 0/4 0/9 8 (88.9 %) 9
Linezolid (LZ) 0/0 0/10 0/10 10 (100 %) 10
Teicoplanin (TEI) 0/1 2/9 (22.2 %) 0/10 8 (80 %) 10
Total (%) 1/6 (16.7 %) 2/23 (8.7 %) 0/29 26 (89.7 %) 29
B
Ampicillin (AMP) 0/3 0/4 0/7 7 (100 %) 7
Linezolid (LZ) 0/0 0/8 0/8 8 (100 %) 8
Teicoplanin (TEI) 0/0 1/8 (12.5 %) 0/8 7 (87.5 %) 8
Total (%) 0/3 1/20 (5 %) 0/23 22 (95.7 %) 23
  1. aUsing the results from the susceptibility testing of the bacteria by Vitek 2 as reference. In case of discrepancies, the results for the susceptibility testing were confirmed by E-test. Data are numbers (with percentages) of bacterial isolates for which the antimicrobial susceptibility testing was concordant/correct or erroneous by PR1 (A) or PR2 (B)