TABLE 2.

Comparison of the discriminatory power of various genetic markers between the Beijing and non-Beijing genotypes

Discriminatory parameterBeijing genotype (n = 243)Non-Beijing genotypeaAll strains (n = 355)
All strains (n = 112)>5 bands (n = 88)<5 bands (n = 24)
MIRU
    Total type pattern60836817135
    No. (%) of isolates having unique type32 (13.2%)65 (58.0%)54 (61.4%)14 (58.3%)91 (25.6%)
    No. of clusters271915344
    No. (%) of clustered isolates211 (86.8%)47 (42.0%)34 (38.6%)10 (41.7%)264 (74.4%)
    Maximum no. of isolates in a cluster7755582
    No. (%) of cluster further differentiated by RFLP25 (92.6%)15 (78.9%)12 (80.0%)2 (66.7%)39 (88.6%)
    HGI0.88270.99290.99320.94930.9376
IS6110 RFLP
    Total type pattern203998316302
    No. of isolates having unique type (%)178 (73.3%)91 (81.25%)78 (88.6%)13 (54.2%)269 (75.8%)
    No. of clusters2585334
    No. of clustered isolates (%)65 (26.7%)21 (18.75%)10 (11.4%)11 (45.8%)86 (24.2%)
    Maximum no. of isolates in a cluster56266
    No. of cluster further differentiated by MIRU (%)10 (40%)4 (50%)2 (40%)2 (66.7%)14 (41.2%)
    HGI0.99790.99610.99870.93120.9986
  • a Non-Beijing strains are further divided into isolates with five or more IS6110 bands and isolates with fewer than five bands.