Table 8.
Results for specific resistance tests using MICNEG1 or MICPOS1 standard turbidity inoculum methods and visual reading versus AST reference methods.
| No. of Isolates | AST Reference a | MSF Panel b | ||||||
|---|---|---|---|---|---|---|---|---|
| Multidrug Resistant Organism | Total | R | S | R | S | CA c (no. [%]) |
ME d (no. [%]) |
VME e (no. [%]) |
| Methicillin-resistant Staphylococcus aureus f | 47 | 33 | 14 | 33 | 14 | 47 (100) | 0 (0) | 0 (0) |
| Inducible clindamycin-resistant Staphylococci f | 74 | 26 | 48 | 26 | 48 | 74 (100) | 0(0) | 0 (0) |
| Vancomycin-resistant Staphylococcus aureus f | 47 | 2 | 45 | 2 | 45 | 47 (100) | 0 (0) | 0 (0) |
| High-level gentamicin resistance Staphylococci f | 49 | 25 | 24 | 25 | 24 | 47 (96) | 1 (2) | 1 (2) |
| Vancomycin-resistant Enterococci f | 49 | 23 | 26 | 23 | 26 | 49 (100) | 0(0) | 0 (0) |
| Extended-spectrum beta-lactamase-producing Enterobacterales g | 112 | 19 | 93 | 19 | 93 | 112 (100) | 0 (0) | 0 (0) |
| Carbapenem-resistant Enterobacterales g | 112 | 33 | 79 | 32 | 80 | 111 (99) | 0 (0) | 1 (1) |
| Colistin-resistant Enterobacterales g | 112 | 12 | 77 | 12 | 77 | 110 (98) | 1 (1) | 1 (1) |
| Carbapenem-resistant Pseudomonas aeruginosa g | 15 | 4 | 11 | 4 | 11 | 15 (100) | 0 (0) | 0 (0) |
| Colistin-resistant Pseudomonas aeruginosa g | 15 | 4 | 11 | 4 | 11 | 15 (100) | 0 (0) | 0 (0) |
| Carbapenem-resistant Acinetobacter baumannii g | 14 | 8 | 6 | 8 | 6 | 15 (100) | 0 (0) | 0 (0) |
a Number of isolates tested with the reference method and classified as R resistant; I, susceptible, increased exposure; S, susceptible; b number of isolates tested with the evaluated method and classified as R resistant; I, susceptible, increased exposure; S, susceptible; c CA, categorical agreement; d ME, major error; e VME, very major error; f Resistance test evaluated on the MICPOS1 panel; g Resistance test evaluated on the MICNEG1 panel.