TABLE 1.

Number of pathogenic (tdh+) V. parahaemolyticus isolates versus temperature and the total number of V. parahaemolyticus isolates

Temp (°C) or V. parahaemolyticus count (log10 g−1)No. of samplesNo. of tdh+ samples (direct plates)No. of tdh+ isolates/ no. of tlh+ isolates from direct plates (%)No. of tdh+ samples (enrichments)No. of tdh+ isolates/ no. of tlh+ isolates from enrichments (%)
Temp
    <152223/63 (4.8)419/858 (2.2)
    15-203011/459 (0.22)317/1,134 (1.5)
    20-251811/660 (0.15)22/641 (0.31)
    25-30681424/5,206 (0.46)68/2,699 (0.30)
    >301822/604 (0.33)00/686 (0.0)
Vibrio counts
    <12858/0a430/1,077 (2.8)
    1-24622/170 (1.2)47/1,555 (0.45)
    2-3651119/2,504 (0.76)45/2,646 (0.19)
    >31722/4,318 (0.05)34/740 (0.54)
    Overall1562031/6,992 (0.44)1546/6,018 (0.76)
  • a Ratio of tdh to tlh is indeterminate.