Table 1: Virulence Properties of 17 E. coli Strains Belonging to the EcoR B2 Group Isolated from Psittacidaes

Strain a bird b Adhesion c CRA d Hemolysis Gene (s) e Antibiotic Resistance Profile f
1 White-eyed conure NA + - irp2 Sensitive to all
2 White-eyed conure AA + + irp2 CipR,CfcR,EnrR,SulR,TetR
3 Blue-frontet parrot CE + + stx CfcR, EnrR,StrR,SulR,TriR
4 Blue-frontet parrot NA - + irp2 CfcR,EnrR,SulR
5 Blue-frontet parrot NA + - irp2 CfcR,SulR
6 Blue-frontet parrot DA + - none SulR
7 Blue-frontet parrot NA + - none CfcR,EnrR,SulR
8 Blue-frontet parrot LA - + irp2, eae, bfpA CipR, CfcR, SulR
9 Blue-frontet parrot DA + + irp2 CfcR,SulR
10 Blue-frontet parrot DA + - none SulR
11 Blue-frontet parrot DA + + irp2 CfcR
12 Blue-frontet parrot DA + - irp2 CfcR,SulR
13 White-eyed conure NA + - irp2 GenR
14 White-eyed conure NA + + irp2 SulR
15 Blue-frontet parrot NA - + none CfcR,EnrR,GenR,SulR
16 Blue-frontet parrot NA - - none CfcR,EnrR,GenR,SulR
17 Blue-frontet parrot NA - + none CfcR,SulR

a Each strain was isolated from a distinct bird
b Bird species: White-eyed-conure: Aratinga leucophthalmus; Blue-fronted-parrot: Amazonia aestiva
c HEp-2 cell adhesion phenotypes; AA, DA, LA: aggregative, diffuse and localized adhesion, respectively; NA: non adherent; CE: cytotoxic effect
d CRA: Congo red adsorption.
e Virulence genes: bfpA: bundling, structural subunit of the EPEC bundle forming pilus; eae, EPEC intimin; stx, Shiga cytotoxins; irp2, yersiniabactin.
f Antibiotics: Cip, ciprofloxacin; Cfc, chloramphenicol; Enr, enrofloxacin; Gen, gentamycin; Str, streptomycin; Sul, sulphamycin; Tet, tetracycline; Tri, trimethoprim.

Back to Article