TABLE 1.
Characteristics of clinical and environmental isolates of V. cholerae
| Strain | Yr of isolation | Origin | Source | No. of isolates | PCR result for:
|
HEp-2 cell cytotoxicity assay result | Reference(s)a | ||
|---|---|---|---|---|---|---|---|---|---|
| rtxA | rtxC | ctxB | |||||||
| V. cholerae | |||||||||
| O1 EI Tor | NAb | NEQ AS4043 | Standard strain | 1 | + | + | + | + | NEQ |
| O1 classical | NA | ATCC 9458 | Standard strain | 1 | − | − | + | − | ATCC |
| O1 classical | NA | ATCC 11628 | Standard strain | 1 | − | − | + | − | ATCC |
| O1 EI Tor | 1986–1999 | Hong Kong SAR | Patient | 81 | + | + | + | + | 7, 22, 23 |
| 1989–1998 | Hong Kong SAR | Environment | 3 | + | + | + | + | 7, 22, 23 | |
| 1999 | Shenzhen, China | Patient | 7 | + | + | + | + | This study | |
| 1996 | Singapore | Patient | 1 | + | + | + | + | This study | |
| 1995 | Thailand | Patient | 29 | + | + | + | + | This study | |
| 1991–1994 | Ukraine | Patient | 3 | + | + | + | + | This study | |
| 1994–1995 | Ukraine | Environment | 3 | + | + | + | + | This study | |
| O139 | 1994–1999 | Hong Kong SAR | Patient | 10 | + | + | + | + | 21, 27, this study |
| 1999 | Shenzhen, China | Patient | 1 | + | + | + | + | This study | |
| Non-O1 | 1993–1999 | Hong Kong SAR | Patient | 5 | + | + | − | + | 19, this study |
| 1993–1999 | Hong Kong SAR | Environment | 23 | + | + | − | + | 19, this study | |
| V. parahaemolyticus | 1993 | Hong Kong SAR | Patient | 5 | − | − | − | − | 19 |
| Diarrheagenic E. coli | 1993–1998 | Hong Kong SAR | Patient | 5 | − | − | − | − | 18, 19, 20 |
| Aeromonas species | 1998–1999 | Hong Kong SAR | Patient | 5 | − | − | − | − | This study |
| Plesiomonas species | 1998–1999 | Hong Kong SAR | Patient | 5 | − | − | − | − | This study |
a
NEQ, National External Quality Assessment Scheme for Microbiology, Colindale, United Kingdom; ATCC, American Type Culture Collection, Manassas, Va.
b
NA, not available.