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Post Date: 12/03/2019

Korea: Develop technology to increase resistance to shrimp

To assist saltwater shrimp farmers who are facing many diseases, Korea’s Adbiotech Company has successfully developed the Ig-Guard (Shrimp) technology using egg yolk antibody technology (IgY). Shrimp Ig-Guard has increased resistance as well as growth index on shrimp.

Replace antibiotics
Last year, technology to increase resistance to shrimp with egg yolk attracted attention in the shrimp industry. But the potential of the new product lies only on research and testing, said Ahn Hyeong-chul, Adbiotech’s director of international sales.

Ahn Hyeong-chul shared: “Based on antibody production technology (igY) using chicken egg yolk, we have launched the Ig-Guard (Shrimp) to improve the resistance of shrimp and anti- again the bacteria and viruses cause disease. In addition, this product also reduces mortality on shrimp, improves feed conversion rates and growth rates. Besides shrimp, using this same technology, we can develop antibody products for salmon, orange fish or eel as required by customers. This product is completely capable of replacing vaccines and antibiotics “.

Produced in the form of a fine powder, Shrimp-Ig (Guard) is considered a natural feed additive for shrimp and many species of farmed fish with a prominent function of controlling the disease. In particular, this product also attests to superior performance against Vibrio and white spot virus (WSSV) on TTCT Pacific. The basic ingredient of the product is egg yolk immuoglobulin and the recommended dosage of 0.1 – 0.5% is added at a rate of 1 – 5 kg / ton of feed.

Future for shrimp industry
Shrimp Ig-Guard (Shrimp) were fed in a series of trials in Vietnam, Thailand and China. In the experimental diet, Ig-Guard (Shrimp) was supplemented by various concentrations through direct feeding or mixed with feed and then challenged with Vibrio parahaemolyticus, viral strain causes EMS / AHPND or WSSV for 4 days.

The parameters of growth performance, survival and immunity were also assessed. Experts found that shrimp fed the diet containing Ig-Guard (Shrimp) by concentration of 0.2% and 0.5% increased weight, survival rate and resistance also increased. . After challenging the Vibrio parahaemolyticus virus, the shrimp survival rate improved to 66.6%, from 33.3% in the negative control group and when challenged with WSSV, the survival rate improved 62.5%. , in contrast to 25.5% in the negative control group. The time after the EMS challenge, shrimp blood cells were increased to 3.51×107 / ml, in contrast to 1.8×107 / ml in the negative control group. After 45 days of additive feeding, the rate of feed conversion improved from 1.42: 1 to 1.23: 1.

In November 2018, at the World Symposium on Crustaceans in China, Shantou University, Dr. Wang Lei said that based on these experimental results, Ig-Guard (Shrimp) can contribute to good management of shrimp farms and improve production, thereby opening a bright future for shrimp farming in Asia.

According to Vietfish Magazine

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