TABLE 4.

Definitions of meningococcal categories used in PCR analyses^a

Category	Isolate PCR	Direct swab PCR	WGS
All meningococci	Any sample in which the porA and/or ctrA gene(s) was detected	Any sample in which the porA and/or ctrA gene(s) and/or the group B capsule gene was detected	Any sample in which the porA and/or ctrA sequences were predicted to encode full-length gene product
Grouped meningococci	Any sample in which the porA and/or ctrA gene(s) and the relevant group capsule gene were detected	Performed only for NmB	Any sample in which the porA and/or ctrA sequences and all the required genes for synthesis and transport of the relevant capsule group were predicted to encode full-length gene products
Nongroupable meningococci	Any sample in which the porA and/or ctrA gene(s) was detected but no capsule gene was detected	Not applicable	Any sample in which the porA and ctrA sequences were predicted to encode full-length gene product and lacking any of the required genes for synthesis and transport of the relevant capsule group OR any sample in which the ctrA sequence is incomplete
Non-NmB meningococci	Not applicable	Any sample in which the porA and/or ctrA gene(s) was detected but the group B capsule gene was not detected	Not applicable
Group B meningococci	See “Grouped meningococci” above	Any sample in which the group B capsule gene was detected	See “Grouped meningococci” above

^aAbbreviations: NmB, Neisseria meningitidis serogroup B; WGS, whole-genome sequencing.