Thực trạng bệnh hoại tử gan tụy cấp tính (AHPND) trên tôm nuôi và kết quả phân lập chủng vi khuẩn gây bệnh ở một số tỉnh Tây Nam Bộ

Early mortality syndrome/acute hepatopancreatic necrosis

(EMS/AHPND) was first detected in China in 2009. The disease

spread rapidly to neighboring countries and emerged in almost major

shrimp-producing regions in the world, including Vietnam. The disease

has caused serious damage to the global shrimp industry and so far, there

is no effective cure. In order to understand the current status of AHPND,

and then to introduce effective prevention and detection measures, we

collected data and shrimp samples in some provinces in the Mekong Delta

to analyze and isolate the pathogenic strains. The results of our study

conducted from 2014 - 2018 in four provinces (Ben Tre, Long An, Bac

Lieu, Kien Giang) showed that AHPND damaged from 2.0 to 57.2% of the

total shrimp farming area. In addition, we isolated 10 AHPND-positive

strains via culturing and PCR. The results of representative sequencing of

three strains LA1, LA5, and LA8 showed that they were 100% similarity

with the previously published strain XN89. These isolated strains are used

as a collection for further studies on the origin and mechanism of the

disease by whole genome sequencing.