TABLE 1.
Detection of tdh-positive and total V. parahaemolyticus in seafood samples in Japan in 2001
| Region of Japan | Seafood | No. of samples
|
||||
|---|---|---|---|---|---|---|
|
tdh-positive V. parahaemolyticus
|
Total V. parahaemolyticus
|
|||||
| Total | tdh positivea | Positive for TDH-producing strainsb | Total | V. parahaemolyticus isolated | ||
| North | Rock oyster | 78 | 7 | 6 | 1 | 1 |
| Scallop | 29 | 0 | NTc | NT | NT | |
| Japanese abalone | 18 | 0 | NT | NT | NT | |
| Hen clam | 7 | 1 | 0 | 4 | 4 | |
| Sea urchin | 3 | 0 | NT | NT | NT | |
| Spiny top shell | 1 | 0 | NT | NT | NT | |
| Japanese oyster | 1 | 0 | NT | 1 | 0 | |
| Total | 137 | 8 | 6 | 6 | 5 | |
| Central | Hen clam | 97 | 8 | 2 | 76 | 72 |
| Short-neck clam | 32 | 7 | 2 | 30 | 30 | |
| Horse mackerel | 9 | 0 | NT | 8 | 7 | |
| Common freshwater clam | 3 | 0 | NT | 3 | 3 | |
| Total | 141 | 15 | 4 | 117 | 112 | |
| South | Horse mackerel | 8 | 0 | NT | 7 | 6 |
| Spiny top shell | 6 | 1 | 0 | 6 | 5 | |
| Short-neck clam | 4 | 1 | 0 | 4 | 4 | |
| Common freshwater clam | 2 | 0 | NT | 2 | 2 | |
| Japanese hard clam | 2 | 0 | NT | 2 | 2 | |
| Japanese razor shell | 1 | 0 | NT | 1 | 1 | |
| Underlined fig shell | 1 | 0 | NT | 1 | 1 | |
| Japanese oyster | 1 | 0 | NT | 1 | 1 | |
| Pen shell | 1 | 0 | NT | 1 | 1 | |
| Tokobushi abalone | 1 | 1 | 0 | 1 | 1 | |
| Total | 27 | 3 | 0 | 26 | 24 | |
| Unknown | Hen clam | 24 | 7 | 1 | 24 | 24 |
| Total | 329 | 33 | 11 | 173 | 165 | |
a
APW enrichment culture directly examined by the PCR method.
b
TDH-producing strains were actually isolated.
c
NT, not tested.