TABLE 4.
Comparison of the O3:K6 strains isolated after 1996 and the O3:K6 and non-O3:K6 strains of V. parahaemolyticus isolated before 1996
| Strain group (n)a |
D50C (min)b
|
% Survival at 4°C
|
D value at pH 4 (min)
|
D value 0.2% NaCl (min)
|
||||
|---|---|---|---|---|---|---|---|---|
| Range | Mean ± SE | Range | Mean ± SE | Range | Mean ± SE | Range | Mean ± SE | |
| Recent O3:K6 strains (30)c | ||||||||
| Japanese strains (6) | 2.47–4.28 | 3.44 ± 0.25 a | 0.36–11.23 | 5.27 ± 2.00 b | 7.76–15.60 | 10.51 ± 1.27 a | 66–194 | 119 ± 18 a |
| Korean strains (4) | 2.42–3.62 | 2.95 ± 0.25 a | 4.72–10.97 | 9.04 ± 1.46 ab | 4.72–8.69 | 6.25 ± 0.86 b | 44–144 | 82 ± 22 b |
| Taiwanese strains (20) | 2.63–9.91 | 4.26 ± 0.40 a | 4.43–18.10 | 11.43 ± 1.03 a | 4.16–19.49 | 7.15 ± 0.83 ab | 56–129 | 79 ± 5 b |
| Other strains (18)d | ||||||||
| Japanese strains (7) | 2.40–4.29 | 3.17 ± 0.26 a | 6.08–16.52 | 10.03 ± 1.71 ab | 3.56–9.84 | 5.91 ± 0.77 b | 56–125 | 78 ± 9 b |
| Taiwanese strains (11) | 2.43–6.57 | 4.08 ± 0.42 a | 6.36–19.39 | 11.75 ± 1.30 a | 4.23–11.41 | 7.36 ± 0.66 ab | 40–183 | 80 ± 12 b |
a
n, number of strains.
b
D50C, D value at 50°C.
c
Recently isolated O3:K6 strains analyzed were obtained from Japan, Korea, and Taiwan after 1996.
d
Other strains included O3:K6 and non-O3:K6 strains isolated in Japan and Taiwan before 1996. Means followed by the same letter were not significantly different by analysis of variance with Duncan's multiple range test at P < 0.05.