TABLE 2.
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 |
S, susceptible; I, intermediate; R, resistant.
We have excluded data from one strain (Salmonella serovar Panama) which may have lost resistance due to transport or storage stress.