TABLE 2.
Comparison of serological tests versus antigenuria detection for diagnosis of legionellosis in 116 patientsa
| Antigenuria status | No. of patients |
||||||||
|---|---|---|---|---|---|---|---|---|---|
| ELISA for IgM |
ELISA for IgG plus IgM |
IFA for IgM |
|||||||
| + | − | ND | + | − | ND | + | − | ND | |
| + | 44 | 11 | 2 | 40 | 14 | 3 | 36 | 17 | 4 |
| − | 31 | 17 | 2 | 23 | 25 | 2 | 15 | 29 | 6 |
| ND | 6 | 3 | 0 | 3 | 6 | 0 | 3 | 5 | 1 |
a
ND, not done or uncertain. P values were calculated by McNemar's test with Yates' correction and were as follows: for ELISA for IgM, 0.0034; for ELISA for IgG plus IgM, 0.1884; and for IFA for IgM, 0.8597.