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. 1999 Dec;37(12):3883–3887. doi: 10.1128/jcm.37.12.3883-3887.1999

TABLE 2.

Properties of ET-37 meningococci isolated during the outbreak

Isolate description Serological characterization ST porA VR1,VR2a porB alleleb tpbB allele
ET-37 complex isolate from United Kingdom (1993) C:2a:P1.5 11 5a,10d 2-2 2
Strain 1
 Case 1 C:2a:NT 11 5,2c 2-36 2
 Carrier 1 (case 1 contact) C:2a:NT 11 5,2c 2-36 2
Strain 2 (outbreak strain)
 Case 3 C:NT:P1.5 50 5a,10d 2-37 2
 Case 6 C:NT:P1.5 50 5a,10d 2-37 2
 Remote case 1 C:NT:P1.5 50 5a,10d 2-37 2
 Remote case 2 C:NT:P1.5 50 5a,10d 2-37 2
Strain 3, carrier 2 C:NT:P1.5,2 11 5,2 2-39 1
Strain 4, carrier 3 C:2a:NT 52 NAd 2-2 1
Strain 5
 carrier 4 C:2a:P1.15 51 19d,15 2-38 1
 carrier 5 C:2a:P1.15 51 19d,15 2-38 1
a

PorA variants are as defined previously (21, 22). 

b

PorB variants are as defined by Urwin (23). 

c

The porA gene in these isolates contained an IS1301 element within their coding regions (1). 

d

NA, a porA gene was not amplified with the primers used in this study, and the gene may have been absent from this isolate.