WFD (White Feces Disease) disease in vannamei shrimp culture has attacked several shrimp producing countries in Asia such as Thailand, Vietnam, India, China, Malaysia, and Indonesia. If not treated quickly and appropriately, WFD disease can cause huge losses for farmers. Clinical symptoms of shrimp infected with white defecation disease are not clearly visible. The presence of “white feces” floating on the surface of the pond water and followed by a decrease in appetite (Somboon et al, 2012).
If not treated quickly and appropriately, WFD disease can cause huge losse s for farmers. So it is necessary to take proper preventive measur es. Infectious diseases that occur in shrimp culture can be an obstacle to increasing shrimp production. Poor treatment of vannamei shrimp culture, unhealthy seeds, and poor water quality can cause microorga isms such as Vibrio spp. at the time of maintenance.
This can cause disease, one of which is WFD disease. This disease is caused by the bacteria Vibrio spp. Symptoms caused when attacked by WFD are decreased appetite for shrimp, abnormal growth of shrimp, white feces loating on the surface of the water, shrimp intestines are white and look empty due to lack of food, and low survival rates (Mastan, 2015).
Vannamei shrimp farmers experienced several losses caused by WFD disease, including causing a decrease in shrimp culture production. In addition, it can also cause mass death of shrimp within 13 days since the initial symptoms appear. Shrimp affected by WFD are very dificult to save, so all existing shrimp must be harvested or disposed of.