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Table 1 Extracellular enzyme composition and activity of Vibrio parahaemolyticus in different food matricesf

From: Influence of food matrix type on extracellular products of Vibrio parahaemolyticus

Measurement index

Enzyme

Strains

Food matrix

Shrimp

Oyster

Freshwater fish

Pork

Chicken

Egg fried rice

Positive circle diameter (mm)

Gelatinase

ATCC 17802

21.98 ± 2.10a

15.92 ± 1.39d

20.72 ± 1.98b

15.00 ± 1.67e

17.52 ± 1.44c

16.56 ± 1.12c

ATCC 33847

29.42 ± 1.71a

17.20 ± 1.39c

21.12 ± 1.45b

14.88 ± 1.56e

18.29 ± 0.99c

16.16 ± 0.91d

Caseinase

ATCC 17802

25.62 ± 2.25a

18.16 ± 1.41c

20.32 ± 1.32b

17.10 ± 1.08d

24.40 ± 3.06a

13.94 ± 2.64e

ATCC 33847

26.20 ± 1.19a

18.08 ± 0.99c

22.80 ± 0.92b

12.60 ± 1.52e

19.40 ± 1.38c

14.40 ± 2.58d

Phospholipase

ATCC 17802

14.90 ± 1.24b

9.20 ± 1.31e

12.50 ± 0.79c

14.04 ± 1.10b

14.12 ± 0.27b

16.80 ± 1.04a

ATCC 33847

16.78 ± 0.49b

10.00 ± 1.39d

17.00 ± 0.52b

13.80 ± 1.53c

13.30 ± 1.05c

18.20 ± 0.89a

Urease

ATCC 17802

21.22 ± 1.23a

16.02 ± 1.98c

18.46 ± 0.58b

15.33 ± 0.74d

16.92 ± 0.32c

11.58 ± 1.02e

ATCC 33847

24.30 ± 0.69a

15.88 ± 1.34c

19.60 ± 1.08b

15.10 ± 1.19d

17.10 ± 0.52c

10.94 ± 1.25e

DNase

ATCC 17802

26.28 ± 1.76a

12.30 ± 0.96d

19.76 ± 1.03b

13.54 ± 2.10d

16.40 ± 0.99c

12.42 ± 1.45d

ATCC 33847

27.90 ± 0.81a

13.90 ± 0.68d

18.82 ± 1.20b

12.42 ± 1.16e

17.04 ± 0.36c

14.00 ± 1.05d

Amylase

ATCC 17802

18.34 ± 1.11a

16.64 ± 1.21c

17.08 ± 0.29b

15.40 ± 1.08c

17.52 ± 0.40b

15.30 ± 1.64c

ATCC 33847

20.80 ± 1.62a

17.12 ± 0.53d

17.99 ± 0.65c

13.70 ± 1.58e

18.98 ± 0.25b

18.20 ± 0.78c

  1. Note: f Mean ± standard deviation of three replicates. Means in the same line with different superscript letters are significantly different (p < 0.05). Results were negative for the filtrates of all food matrices not inoculated with V. parahaemolyticus