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Variation among Gram stain and culture results with lower respiratory tract specimens
| Specimen | Procedure | No. of instances of variationa
|
||||
|---|---|---|---|---|---|---|
| 0 | 1 | 2 | 3 | 4 | ||
| Expectorated sputa (n = 26) | Gram staining | 23 | 16 | 10 | 1 | 2 |
| Culture | 32 | 18 | 1 | 1 | ||
| Tracheal aspirates (n = 38) | Gram staining | 46 | 21 | 8 | 1 | 0 |
| Culture | 59 | 13 | 3 | 1 | ||
Number of instances in which replicate B or C varied from replicate A with respect to the indicated number of morphotypes observed or bacteria seen.
