CURRENT AFFAIRS

Detailed explanation-1: -The researchers found that EMS is caused by a bacterial agent, which is transmitted orally, colonizes the shrimp gastrointestinal tract and produces a toxin that causes tissue destruction and dysfunction of the shrimp digestive organ known as the hepatopancreas. It does not affect humans.

Detailed explanation-2: -Research by the University of Arizona has identified that the disease is caused by the bacterial agent Vibrio parahaemolyticus, which is transmitted orally and colonises the shrimps gastrointestinal tract.

Detailed explanation-3: -The disease appears within 20 to 30 days of stocking ponds with postlarvae. Both black tiger shrimp (Penaeus monodon) and Pacific white shrimp (Litopenaeus vannamei) are affected by the disease. Mortalities can approach 100 percent in severely affected ponds, where diseased shrimp become lethargic and anorexic.

Detailed explanation-4: -vannamei farms in India were encountering low and continuous mortalities. This condition results a small percent shrimp mortality in the affected pond on daily basis. As the mortality continues on daily basis till the rest of the culture period, it is called as “Running Mortality Syndrome (RMS)”.