Table 1.
The proportion of multidrug resistant staphylococci and mecA positive isolates compared with the number of isolates analysed in East and West London and the proportion of antibiotics they were resistant to compared with the number of multidrug resistant staphylococci from East and West London.
| East London | West London | stats to test | |||||
|---|---|---|---|---|---|---|---|
| Total number of samples screened (N = 224) | Total number of samples screened (N = 376) | ||||||
| N | % of total number of samples screened | N | % of total number of samples screened | % Difference | X2 | P value | |
| Multidrug resistant staphylococci | 127 | 56.70 | 154 | 40.96 | 15.74 | 13.944 | 0.0002 |
| mecA positive | 24 | 10.71 | 27 | 7.18 | 3.53 | 2.246 | 0.1340 |
| N | % MR staphylococci | N | % of MR staphylococci | % Difference | X2 | P value | |
| Oxacillin | 38 | 29.92 | 32 | 20.78 | 9.14 | 3.097 | 0.0784 |
| Gentamicin R | 13 | 10.24 | 13 | 8.44 | 1.79 | 0.268 | 0.6049 |
| Gentamicin I | 1 | 0.79 | 0 | 0.00 | 0.79 | 1.217 | 0.27 |
| Muprcion R | 4 | 3.15 | 8 | 5.19 | 2.05 | 0.706 | 0.4006 |
| Muprcion I | 25 | 19.69 | 4 | 2.60 | 17.09 | 21.879 | <0.0001 |
| Amoxicillin | 33 | 25.98 | 45 | 29.22 | 3.24 | 0.363 | 0.5468 |
| Erythromycin R | 47 | 37.01 | 96 | 62.34 | 25.33 | 17.805 | <0.0001 |
| Erythromycin I | 1 | 0.79 | 5 | 3.25 | 2.46 | 2.006 | 0.1567 |
| Tetracycline | 36 | 28.35 | 38 | 24.68 | 3.67 | 0.481 | 0.4878 |
| Cefoxitin | 29 | 22.83 | 34 | 22.08 | 0.76 | 0.022 | 0.8809 |
| Cefepime R | 7 | 5.51 | 10 | 6.49 | 0.98 | 0.117 | 0.7321 |
| Cefepime I | 2 | 1.57 | 1 | 0.65 | 0.93 | 0.557 | 0.4556 |
| Fusidic acid | 97 | 76.38 | 106 | 68.83 | 7.55 | 1.971 | 0.1603 |
| Penicillin | 102 | 80.31 | 124 | 80.52 | 0.20 | 0.002 | 0.9648 |
| Chloramphenicol R | 1 | 0.79 | 10 | 6.49 | 5.71 | 5.992 | 0.0144 |
| Chloramphenicol I | 1 | 0.79 | 2 | 1.30 | 0.51 | 0.17 | 0.6997 |
All chi-squared test was performed with 1 degree of freedom. R = resistance; I = intermediate resistance; MR = multidrug resistant.