Skip to main content

Table 3 Distribution of virulence genes in different phylogroups and serogroups detected in Escherichia coli strains isolated from yaks with diarrhea (n = 292)

From: Antibiotic resistance, serogroups, virulence genes, and phylogenetic groups of Escherichia coli isolated from yaks with diarrhea in Qinghai Plateau, China

Virulence gene (s)a No. (%) of isolates Phylogenetic group, no. Serogroup, no.
A B1 B2 D F ß O2 O8 O52 O60 O61 O66 O91 O97 O117 O139 O145 O158 O159 O165 O172 NDb
Total no. 232 22 12 17 2 7 25 13 9 5 10 11 42 18 24 5 45 10 20 8 21 26
sfa 78 (26.7) 46 12 5 10 1 4 8 6 2 1 1 3 11 12 3 6 8 5 12
eaeA 5 (1.7) 5 1 2 2
aer, cnf1 4 (1.4) 4 1 1 1 1
eaeA, sfa 63 (21.6) 51 4 3 3 1 1 3 3 2 2 22 3 6 2 11 9
aer, hlyA, sfa 3 (1.0) 3 1 2
cnf1, eaeA, sfa 16 (5.5) 15 1 2 1 3 9 1
aer, etrA, hlyA, sfa 2 (0.7) 2 1 1
cnf1, eaeA, etrA, sfa 45 (15.4) 45 2 4 2 1 4 4 6 3 5 5 1 3 1 4
cnf1, eaeA, hlyA, sfa 7 (2.4) 3 2 2 2 2 1 1 1
cnf1, eaeA, papC, sfa 9 (3.1) 8 1 2 1 1 3 1 1
faeG, hlyA, papC, sfa 2 (0.7) 1 1 2
faeG, hlyA, rfc, sfa 1 (0.3) 1 1
faeG, papC, sfa, sepA 1 (0.3) 1 1
papC, rfc, sfa, sepA 1 (0.3) 1 1
aer, cnf1, eaeA, papC, sfa 10 (3.4) 10 2 1 7
cnf1, eaeA, hlyA, papC, sfa 10 (3.4) 8 1 1 2 5 3
aer, cnf1, eaeA, hlyA, papC, sfa 9 (3.1) 9 1 1 2 2 2 1
cnf1, eaeA, etrA, hlyA, papC, sfa 15 (5.1) 15 1 2 12
cnf1, etrA, faeG, papC, rfc, sfa 1 (0.3) 1 1
eaeA, faeG, hlyA, papC, rfc, sfa 1 (0.3) 1 1
aer, cnf1, eaeA, hlyA, papC, rfc, sfa 1 (0.3) 1 1
aer, cnf1, eaeA, etrA, faeG, papC, sfa 8 (2.7) 7 1 2 2 1 3
  1. aer, Aerobatin; cnf1, cytotoxic necrotizing factor 1; eaeA, Intimin; etrA, component of ETT2 type III secretion system; faeG, F4 fimbrial adhesion; hlyA, α-hemolysin; papC, Pilus associated with pyelonephritis (P fimbriae); rfc, lipopolysaccharide synthesis; sepA, secreted serine protease of the auto-transporter family; sfa, S fimbriae (sialic acid-specific); –, indicates none of the isolates were positive; ß, strains that were not assigned to any phylogroup; ND, strains that were not assigned to any serogroup