TABLE 1.
Characteristics of the E. coli strains used in this study
Strain | Source (reference) | No. of plasmids (size [kb]) | Serogroup | Phylogenetic group | Type by MLST | Presence of genes associated with the conserved virulence region of APEC plasmids |
|||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
iutA | sitA | RepFIB | hlyF | ompT | etsAB | iss | iroN | ||||||
DH5αa | 0 | NTe | A | ST1060 | − | − | − | − | − | − | − | − | |
APEC 79 | California | 2 (133, 90) | O18 | A | ST23 | − | + | + | + | + | + | + | + |
APEC 353 | Nebraska | 2 (133, 116) | O18 | B2 | ST95 | + | + | + | + | + | + | + | + |
APEC 358 | Nebraska | 1 (133) | O18 | B2 | ST95 | + | + | + | + | + | + | + | + |
APEC 370 | Nebraska | 1 (133) | O18 | B2 | ST95 | + | + | + | + | + | + | + | + |
APEC 380 | Nebraska | 3 (133, 116, <50) | O18 | B2 | ST95 | + | + | + | + | + | − | + | + |
NMEC 4 | Netherlands (13) | 0 | O18 | B2 | ST390 | + | + | − | − | − | − | − | + |
NMEC 15 (SP15) (26) | Netherlands (13) | 2 (143, 116) | O18 | B2 | ST95 | + | + | + | + | + | + | + | − |
NMEC 18 | Netherlands (13) | 2 (135, <50) | O18 | B2 | ST390 | + | + | + | + | + | + | + | + |
NMEC 38 (SP38) (26) | Netherlands (13) | 1 (149) | O18 | B2 | ST95 | + | + | + | + | + | + | − | + |
NMEC 58 | Netherlands (13) | 1 (149) | O18 | B2 | ST416 | + | + | + | + | + | + | + | + |
NMEC RS218b | (40) | 1 (123) | O18 | B2 | ST95 | − | + | + | − | − | − | − | + |
NMEC C5b | (40) | 1 (130) | O18 | B2 | ST95 | − | + | + | − | − | − | − | + |
APEC χ7122c | (24) | 3 (103, 90, 60) | O78 | A | ST23 | + | + | + | + | + | + | + | + |
APEC O2d | (19) | 2 (180, 101) | O2 | B2 | ST135 | + | + | + | + | + | + | + | + |
Negative control for rat neonatal meningitis model and ELA.
Positive control for rat neonatal meningitis model.
Positive control for chick colisepticemia model.
Positive control for ELA.
NT, nontypeable.