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Table 1 Frequency of strong biofilm production among strains with distinct pilus island (PI) alleles and PI-1

From: Association between genotypic diversity and biofilm production in group B Streptococcus

Pilus island allele (a) Total number of strains Strong biofilm (%), n Clonal complexes represented (n) PI-1 presence (%)
PI-2a, a1 89 21.4 (n = 19) 19 (n = 87), 1 (n = 1), 12 (n = 1) 98.9
PI-2a, a2 16 87.5 (n = 14) 23 (n = 8), 1 (n = 7), S (n = 1) 93.8
PI-2a, a3 5 100.0 (n = 5) 12 (n = 3), 1 (n = 1), 7 (n = 1) 60.0
PI-2a, a4 6 83.3 (n = 5) S (n = 5), 1 (n = 1) 66.7
PI-2a, a5 21 90.5 (n = 19) 23 (n = 17), S (n = 2), 19 (n = 1), 7 (n = 1) 14.3
PI-2a, a6 31 77.4 (n = 24) 1 (n = 17), 12 (n = 9), 23 (n = 4), S (n = 1) 93.6
PI-2b, a1 11 72.7 (n = 8) 1 (n = 8), 7 (n = 2), S (n = 1) 100.0
PI-2b, a2 69 21.7 (n = 16) 17 (n = 69) 100.0
PI-2b, a3 45 86.7 (n = 39) 61 (n = 20), 67 (n = 12), S (n = 11), 1 (n = 1), 17 (n = 1) 2.2
  1. S singleton