TABLE 2.
Annual and overall average number of antimicrobial agents tested by participating laboratories, percent correct results, and percent minor, major, and very major deviations in the EQAS from 2000 to 2007a
| Yr | No. of laboratories participating in each EQAS iteration | Avg no. of antimicrobial agents tested by participating laboratories | % Correct test results | % Minor deviations (S to I or I to R switch) | % Major deviations (S to R switch) | % Very major deviations (R to S switch) | % Critical deviations (R to S and S to R switch) | % Total deviations |
|---|---|---|---|---|---|---|---|---|
| 2000 | 44 | 9.1 | 92 | 4 | 4 | 0 | 4 | 8 |
| 2001 | 108 | 8.9 | 91 | 6 | 2 | 1 | 3 | 9 |
| 2002 | 119 | 8.9 | 92 | 6 | 2 | 1 | 3 | 9 |
| 2003 | 147 | 9.3 | 92 | 4 | 2 | 2 | 4 | 8 |
| 2003b | 147 | 8.1 | 93 | 4 | 3 | 0 | 3 | 7 |
| 2004 | 152 | 10.2 | 93 | 4 | 2 | 1 | 3 | 7 |
| 2006 | 143 | 11.2 | 88 | 8 | 3 | 1 | 4 | 12 |
| 2007 | 143 | 10.8 | 93 | 4 | 2 | 1 | 3 | 7 |
| Totalb | 129 | 9.6 | 91 | 6 | 2 | 1 | 3 | 9 |
a
S, susceptible; I, intermediate; R, resistant.
b
We have excluded data from one strain (Salmonella serovar Panama) which may have lost resistance due to transport or storage stress.