TABLE 2.
Characterization of 92 STEC strains isolated from cattle in Japan
| O serogroup | No. of strains or strain | No. of strains froma:
|
No. of strains with the following genes:
|
Intimin type | Antimicrobial resistanceb | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Calves | Heifers | Cows | stx1 | stx2 | stx1 and stx2 | ehlyA | bfp | EAF plasmid | eae | espA | espB | espD | tir | ||||
| O1 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O2 | 1 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O8 | 8 | 3 | 4 | 1 | 3 | 2 | 3 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ABPC + DSM (1)c | |
| OTC + CTC (2) | |||||||||||||||||
| O15 | 4 | 0 | 0 | 4 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O22 | 4 | 0 | 2 | 2 | 0 | 0 | 4 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O26 | 9 | 4 | 1 | 4 | 9 | 0 | 0 | 6 | 0 | 0 | 8 | 8 | 8 | 8 | 8 | β (8)c | CL (1) |
| 28ac | 1 | 1 | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O38 | 3 | 0 | 1 | 2 | 0 | 0 | 3 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O55 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O73 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O84 | 6 | 1 | 1 | 4 | 6 | 0 | 0 | 6 | 0 | 0 | 6 | 0 | 6 | 6 | 5 | NTd | |
| O88 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O103 | 3 | 0 | 1 | 2 | 3 | 0 | 0 | 3 | 0 | 0 | 3 | 1 | 3 | 3 | 3 | ɛ (3) | OTC + CTC (1) |
| O104 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O111 | 2 | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | β (2) | DSM (1) |
| DSM + OTC + CTC (1) | |||||||||||||||||
| O113 | 8 | 3 | 2 | 3 | 0 | 8 | 0 | 5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O116 | 6 | 1 | 3 | 2 | 0 | 6 | 0 | 6 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O119 | 2 | 0 | 2 | 0 | 1 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O123 | 1 | 0 | 1 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O125 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O136 | 4 | 1 | 1 | 2 | 4 | 0 | 0 | 4 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O153 | 2 | 0 | 0 | 2 | 0 | 2 | 0 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O157 | 1 | 0 | 0 | 1 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 1 | 1 | 1 | γ (1) | |
| O158 | 1 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| O163 | 2 | 1 | 0 | 1 | 0 | 1 | 1 | 2 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | ||
| NT | 18 | 4 | 7 | 7 | 1 | 11 | 6 | 14 | 0 | 0 | 2 | 2 | 2 | 2 | 2 | β (2) | CL (1) |
| Total | 92 | 19 | 28 | 45 | 28 | 42 | 22 | 66 | 0 | 0 | 22 | 14 | 22 | 22 | 21 | ||
| O157 | Fuku-07 | 1 | 1 | +e | − | − | + | + | + | + | + | γ | |||||
| O157 | Oki-04 | 1 | 1 | + | − | − | + | + | + | + | − | γ | |||||
| O157 | Sai-11 | 1 | 1 | + | − | − | + | + | + | + | + | γ | |||||
| O157 | Shizu-19 | 1 | 1 | + | − | − | + | + | + | + | + | γ | |||||
| O157 | ATCC 43889 (human) | 1 | + | − | − | + | + | + | + | + | γ | ||||||
| O157 | ATCC 43890 (human) | 1 | + | − | − | + | + | + | + | + | γ | ||||||
| O157 | ATCC 43894 (human) | 1 | + | − | − | + | + | + | + | + | γ | ||||||
| O157 | ATCC 35150 (human) | 1 | + | − | − | + | + | + | + | + | γ | ||||||
a
The calves were less than 5 months old, and the heifers were between 5 and 12 months old.
b
ABPC, aminobenzylpenicillin; DSM, dihydrostreptomycin; OTC, oxytetracycline; CTC, chlortetracycline; KM, kanamycin; CL, colistin.
c
The numbers in parentheses are numbers of strains.
d
NT, the strains could not be typed.
e
+, gene present; −, gene not present.