Table 1.

Serogroup, source, porA promoter spacer length and composition, and PorA expression of meningococcal isolates

StrainSourceVariantSerogroupLength ofporA promoter spacer (bp)Homopolymeric G tractPorA expression
B515PatientA6-4CaA14+
A6aA15+
A6-1aA16++
800988BloodB15+
980243ThroatC16+
RefZThroatZ16++
RefIThroatI16++
831016BloodB16+
RefXThroatX16++
2317CSFB16+
980213ThroatC16+
980218ThroatC16+
YPThroat2bC16+
1bC16
Z4047PatientA17++
Z4063PatientA17++
Z4756PatientA17++
Z4024ThroatA17++
Z4096PatientA17++
B435ThroatA17++
932023BloodA17++
486CSFB17++
800615CSFB17++
800619CSFB17++
980244ThroatC17++
980432ThroatC17++
RefLThroatL17++
980250ThroatC17++
Ref29EThroat29E17++
RefKThroatK17++
930038CSFZ17++
950718CSFZ17+
860183 IcCSFC17++
860183 IIcBloodC17+
800377CSFB17
941571Blood29E18++
B153CSFA18++
1318CSFB18++
850654CSFB18++
970971CSFC18++
971035 ICSFC18++
980251ThroatC18++
921637BloodX18++
930966CSFY18++
900900BloodY18++
920160CSFNG18++
950821BloodNG18++
RefYThroatY18++
RefW135PatientW13518++
RefHThroatH18++
890461CSFA19++
971324CSFC19++
980229ThroatC19++
891286CSFA19++
941760CSFNG19++
902541CSFX19++
941397Blood29E19++
851267CSFB20+
830248CSFB9-4dB20++
B9dB22++
B9-17dB23++
820486CSFB21++
972087CSFC21++
971036BloodC23++
B535CSFA23++
B292CSFA24++
  • a A6-4C and A6-I variants were both present among A6 variants with a frequency of 10−3.

  • b YP1 (6%) and YP2 (91%) were isolated from the primary culture plate from the throat swab of one carrier. In addition, 3% of the colonies were porA negative.

  • c 860183 I and 860183 II were isolated from CSF and blood, respectively, of one patient.

  • d B9-4 and B9-17 variants were both present among B9 variants with a frequency of 10−3.