Sampling method for cases in each site
| State | Expected number of notified cases during study period | Estimated cases from participating pathology laboratory | Culture-positive cases | Sequential sampling of notified cases | Total number of cases | Expected number to be recruited (~80% participation rate) |
| QLD | 7000 | 2800 | 1260 | Select every fourth case | 315 | 250 |
| ACT | 600 | 130 | 130 | Include all notified cases | 130 | 100 |
| NSW (Hunter New England) | 1050 | 313 | 313 | Include all notified cases | 313 | 250 |
| Total | 8650 | 3243 | 1703 | 758 | 600 |
ACT, Australian Capital Territory; NSW, New South Wales; QLD, Queensland.