Table 3.
Sensitivity and specificity of genotype predictions of resistant antimicrobial phenotype for E. coli isolates by time point and treatment group for tetA and tetB genes. 1. Time point in days when sample was collected; 2. Treatment group; 3. Number of isolates from each treatment group for each sampling time point; 4. Number of isolates for which both the referred antimicrobial resistance gene and corresponding resistance phenotype were observed; 5. Number of isolates for which the referred antimicrobial resistance gene was not detected, but the expected corresponding resistance phenotype were observed; 6. Number of isolates for which the referred antimicrobial resistance gene was detected, but the expected corresponding resistance phenotype was not observed; 7. Number of isolates for which both the referred antimicrobial resistance gene and corresponding resistance phenotype were not observed; 8. Sensitivity for the referred resistance gene to correctly predict phenotypic resistance to the corresponding antimicrobial drug; 9. Specificity for the absence of the referred resistance gene and prediction of lack of phenotypic resistance to the corresponding antimicrobial drug.
Time point1 | Tx group2 | N° isolates3 | tetA | tetB | ||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
G+: P+4 | G−: P+5 | G+: P−6 | G−: P−7 | Se8 | Sp9 | G+: P+4 | G−: P+5 | G+: P−6 | G−: P−7 | Se8 | Sp9 | |||
0 | CTL | 21 | 14 | 5 | 0 | 2 | 73.7 | 100 | 15 | 4 | 0 | 2 | 78.9 | 100 |
ENR | 22 | 11 | 4 | 1 | 6 | 73.3 | 85.7 | 10 | 5 | 0 | 7 | 66.7 | 100 | |
TUL | 24 | 21 | 2 | 0 | 1 | 91.3 | 100 | 17 | 6 | 0 | 1 | 73.9 | 100 | |
7 | CTL | 21 | 15 | 1 | 0 | 5 | 93.8 | 100 | 10 | 6 | 0 | 5 | 62.5 | 100 |
ENR | 22 | 19 | 2 | 0 | 1 | 90.5 | 100 | 16 | 5 | 0 | 1 | 76.2 | 100 | |
TUL | 24 | 18 | 3 | 0 | 3 | 85.7 | 100 | 14 | 7 | 0 | 3 | 66.7 | 100 | |
28 | CTL | 21 | 5 | 7 | 0 | 9 | 50.0 | 100 | 6 | 6 | 0 | 9 | 50.0 | 100 |
ENR | 22 | 12 | 2 | 1 | 8 | 57.1 | 100 | 8 | 6 | 0 | 8 | 57.1 | 100 | |
TUL | 24 | 12 | 2 | 0 | 10 | 28.6 | 100 | 4 | 10 | 0 | 10 | 28.6 | 100 | |
56 | CTL | 20 | 4 | 1 | 1 | 14 | 80.0 | 93.3 | 1 | 4 | 0 | 15 | 20.0 | 100 |
ENR | 20 | 2 | 0 | 2 | 16 | 100.0 | 88.9 | 0 | 2 | 0 | 18 | 0.0 | 100 | |
TUL | 23 | 4 | 0 | 0 | 19 | 100.0 | 100 | 0 | 4 | 0 | 19 | 0.0 | 100 |