Table 2.
Distribution of 430 isolates of P. chrysogenum and P. rubens in London and on the underground
| Location group | Location | Total number of Penicillium isolates | Number of P. chrysogenum | (%) | Number of P. rubens | (%) | Number of other Penicillium | (%) |
|---|---|---|---|---|---|---|---|---|
| Bakerloo Line | Baker street | 22 | 5 | (22.7) | 0 | (0.0) | 17 | (77.3) |
| Edgware road | 31 | 4 | (12.9) | 3 | (9.7) | 24 | (77.4) | |
| Marylebone | 40 | 3 | (7.5) | 5 | (12.5) | 32 | (80.0) | |
| Paddington | 39 | 5 | (12.8) | 3 | (7.7) | 31 | (79.5) | |
| Bakerloo Line total | 132 | 17 | (12.9) | 11 | (8.3) | 104 | (78.8) | |
| Central Line | Chancery lane | 30 | 5 | (16.7) | 6 | (20.0) | 19 | (63.3) |
| Holborn | 27 | 7 | (25.9) | 9 | (33.3) | 11 | (40.7) | |
| Oxford circus | 35 | 5 | (14.3) | 6 | (17.1) | 24 | (68.6) | |
| Tottenham court road | 33 | 6 | (18.2) | 9 | (27.3) | 18 | (54.5) | |
| Central line total | 125 | 23 | (18.4) | 30 | (24.0) | 72 | (57.6) | |
| Jubilee Line | Bond street | 32 | 9 | (28.1) | 6 | (18.8) | 17 | (53.1) |
| Green park | 17 | 0 | (0.0) | 2 | (11.8) | 15 | (88.2) | |
| Waterloo | 8 | 0 | (0.0) | 2 | (25.0) | 6 | (75.0) | |
| Westminster | 16 | 1 | (6.3) | 4 | (25.0) | 11 | (68.8) | |
| Jubilee line total | 73 | 10 | (13.7) | 14 | (19.2) | 49 | (67.1) | |
| St Mary's Hospital | Hospital corridor | 12 | 3 | (25.0) | 0 | (0.0) | 9 | (75.0) |
| A&E | 16 | 0 | (0.0) | 2 | (12.5) | 14 | (87.5) | |
| Alexander Fleming's lab | 20 | 3 | (15.0) | 4 | (20.0) | 13 | (65.0) | |
| DIDE laboratory | 4 | 0 | (0.0) | 1 | (25.0) | 3 | (75.0) | |
| St Mary's hospital total | 52 | 6 | (11.5) | 7 | (13.5) | 39 | (75.0) | |
| Outdoors | Norfolk square gardens | 16 | 1 | (6.3) | 2 | (12.5) | 13 | (81.3) |
| Canal | 16 | 1 | (6.3) | 1 | (6.3) | 14 | (87.5) | |
| Praed street | 16 | 0 | (0.0) | 0 | (0.0) | 16 | (100.0) | |
| Outdoors total | 48 | 2 | (4.2) | 3 | (6.3) | 43 | (89.6) | |
| Grand total | 430 | 58 | (13.5) | 65 | (15.1) | 307 | (71.4) | |
Statistical difference (using the Tukey–Kramer test following ANOVA, p < 0.05) in the number of P. rubens was found between the Central and Bakerloo Lines, and between the Central Line and the Outdoors.