Serotype and drug-resistance of 79 Vibrio parahaemolyticus strains in Dongguan

Objective To understand the serotype and antibiotics resistance of Vibrio Parahaemolyticus(VP) in Dongguan.Methods Slide serum agglutination test and the drug sensitivity test were used to detect the serotype and the antibiotics resistance of 79 strains Vibrio parahaemolyticus isolated from food-poisoning patients,question food and aquatic products in Dongguan in 2009 and 2010.Results Seventy-nine strains of Vibrio parahaemolyticus were centralized on seven serum groups:O1,O2,O3,O4,O5,O8,O10 and the main group were O3 and O1,accounting for 32.91%(26/79) and 25.32%(20/79) respectively.Five serotypes were identified for 44 strains isolated from food-poisoning patients,the total typing-rate was70.45% and the main serotypes were O3: K6 in 2009 and O1: KUT in 2010,accounting for 81.48%(20/27) and 64.71%(11/17) respectively,while 14 serotypes for 35 strains isolated from question food and aquatic products with no popular type and the total typing-rate was 40.0%.All isolated strains were highly resistant to ampicillin and cefalotin with the drug-resistance rates of 99.0% and 37.98% respectively.Conclusion The serotype constituent of Vibrio parahaemolyticus was characterized by dynamic changes with the serotypes decrease and it was multi-drug resistant to 3 kinds of drugs with the number of resistance-drugs increase in Dongguan in 2009-2010.