Detection and Quantification of Total and Pathogenic Vibrio parahaemolyticus in Anadara subcrenata in the Zhoushan Archipelago

Table 6

Prevalence of contamination of pathogenic Vibrio parahaemolyticus in Anadara subcrenata in different markets.

Markets	Number of samples	No. of positive samples	Positive rate (%)	Number of samples with pathogenic V. parahaemolyticus (MPN/g)					Densities of tdh or tlh positive samples (MPN/g)
				None detected	<10	10–10^2	10^2–10^3	>10^3	Median	Min–max
Aqua farm	109	9	8.26	100	6	2	1	0	27	0.30–240.00
Retail market	156	16	10.26	140	11	4	1	0	53	0.36–240.00
Total	265	25	9.43	240	17	6	2	0	6.4	0.30–240

The positive rate of pathogenic V. parahaemolyticus between different markets had no significant difference ().