Ảnh hưởng của nhiệt độ lên sự mẫn cảm của tôm thẻ chân trắng (Litopenaeus vannamei) với vi khuẩn Vibrio parahaemolyticus

The purpose of this study was to assess the susceptibility of whiteleg shrimp (Litopenaeus vannamei) to Vibrio parahaemolyticus, a causative agent of acute hepatopancreatic necrosis disease (AHPND), at different culture temperatures. Experimental shrimp (1.5 ± 0.13 g/shrimp) were randomly stocked with the density of 30 shrimp/tank (150L in volume) containing 15ppt seawater and constant aeration. Temperatures in experimental tanks (by a group of 12 tanks) were adjusted to 28°C, 30°C, 32°C and 34°C. Three days after being acclimated to different temperatures, shrimp from three tanks at each temperature were immersion challenged with V. parahaemolyticus. After 14 days post challenge, shrimp at 34°C were more susceptible to V. parahaemolyticus with significantly higher cumulative mortality (96.7 ± 2.9%) compared to thoese at lower temperature (P