| (1) | correct positive (1), correct negative (−1), with serotyping | |
| (2) | correct positive (1), correct negative (−1), without serotyping | |
| (3) | false positive (10), false negative (−10) | |
| (4) | one of two reported results false positive (4.5) or false negative (−4.5) | |
| (5) | No response or not analyzed |
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