Cross-tabulation of qPCR and ELISA results.
Results from qPCR and normalized OD values from days -1, 2, 4, 6, 19–24 and 41–55. Out of 141 samples, 52 were concordant (43 samples tested positive, and 9 samples tested negative by both methods). All ELISA positive samples were also positive by qPCR.All 43 ELISA-positive samples are also qPCR positive, while most (89/132) of the qPCR-positive samples are ELISA negative (Baseline samples (study day minus 1) for each participant were examined by both plate- and array card-based qPCR, the latter of which was used to detect enteric pathogens in addition to 