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Table 1 Allelic diversity among B. abortus VNTR loci

From: Evaluation of the HOOF-Print assay for typing Brucella abortus strains isolated from cattle in the United States: results with four performance criteria

  No. of Alleles Range of Repeats Discrimination Indexa
Biovar 1 strains    
Locus-1 14 2 – 14, Mc 0.90
Locus-2 4 3 – 6 0.66
Locus-3 9 3 – 16 0.78
Locus-4 7 2 – 10 0.77
Locus-5 2 2 – 3 0.07
Locus-6 3 2 – 3, M 0.17
Locus-7 12 3 – 14 0.87
Locus-8 1 2 0.00
Biovar 2 strains    
Locus-1 8 2 – 10 0.80
Locus-2 5 3 – 7 0.71
Locus-3 8 2 – 13 0.86
Locus-4 6 2 – 7 0.78
Locus-5 2 2 – 5 0.14
Locus-6 4 2 – 4, M 0.39
Locus-7 12 3 – 15 0.93
Locus-8 1 2 0.00
Biovar 4 strains    
Locus-1 10 2 – 12 0.92
Locus-2 2 4 – 5 0.53
Locus-3 5 1 – 6 0.74
Locus-4 5 2 – 6 0.77
Locus-5 1 2 0.00
Locus-6 2 2, M 0.43
Locus-7 9 3 – 12 0.90
Locus-8 1 2 0.00
All strains b    
Locus-1 14 2 – 14, M 0.87
Locus-2 5 3 – 7 0.67
Locus-3 11 1 – 16 0.82
Locus-4 7 2 – 13 0.78
Locus-5 3 2 – 5 0.04
Locus-6 5 2 – 5, M 0.40
Locus-7 13 3 – 15 0.89
Locus-8 1 2 0.00
  1. a-The Discrimination Index was calculated for each locus by the method of Hunter and Gaston as described in the Materials and methods section; b -These numbers were calculated from the entire 103-sample test population. c – "M" indicates an atypical (mutant) allele.