Positive results of diagnostic tests for Legionnaires' disease (LD) in study patients (n=77)
| Positive diagnostic test for LD | No of patients |
|---|---|
| Sputum culture | 9 |
| Fourfold rise in titre/seroconversion | 33 |
| Urinary antigen test | 50 |
| Polymerase chain reaction | 3 |
| Single high titre ≥1:256 | 6 |
| None | 7 |