TABLE 1.

Characteristics of carriage strains isolated in this studya

SerogroupSerotypeSubtypeLPS typePhenotype designationStrain designationSourceb
StudentWeekSite
B45,2L3AMC168373T
BNT7-2,4L3BMC169303T
B419,15L3CMC170918T
B119-1,15-11L1DMC171280G
B122,14L3EMC1721531T
C2b5,2L3FMC173123G
29E45-1,10-8NDGMC17450T
29ENT18,25NDHMC1751718T
29E145-1,2-2NDIMC176393G
NGNT17,16-24NDJMC177333T
NGNT5-2,10-25NDKMC178293T
  • a Isolates were characterized by serogroup, serotype, and subtype antigens by standard methods at the Meningococcal Reference Unit (Manchester Public Health Laboratory). DNA sequencing of the variable subtype-specific encoding regions of the PorA protein (3) at our laboratory further characterized these strains. ND, not determined; NG, nonserogroupable; NT, nonserotypeable.

  • b The source of the selected isolate (MC numbers) of each strain phenotype is indicated by the volunteer number followed by time point (weeks 0, 3, 18 or 31) and specimen type (T, throat swab; G, gargle specimen).