FIG 3.

Concordance between assays. Concordance between two assays was defined as both assays identifying pneumococcal carriage as VT or as NVT. Latex agglutination and PneumoCaT reported one result per sample, both using the same pure-growth culture. The microarray, using an aliquot of the original NPS-STGG, differentiated individual serotypes in multiple-serotype carriage, when present. In comparing the three assays, concordance was based on serotype if latex serotyping reported VT carriage. If latex serotyping reported NVT carriage, this was considered concordant with any NVT reported by PneumoCaT or the microarray, as long as PneumoCaT and the microarray reported the same NVT.