White feces disease is one of the most serious problems in shrimp culture. It causes lower productivity in shrimp farming. WFD becomes apparent when the digestive system of shrimp malfunctions and feces turns from normal brownish color to pale white color. WFD has caused significant economic losses to shrimp farmers, because of high FCR, slow growth, and variable sizes of shrimp at harvest. White feces syndrome usually occurs after 60 days of culture (DOC) and it may be accompanied by high shrimp mortality.  The disease can cause moderate to severe economic loss by reducing shrimp survival by 20–30 percent.

Causes

Poor water quality, unhealthy seed, high vibrio loads, Enterocytozoon hepatopenaei (EHP), and the Presence of Protozoa gregarines-like organisms in the intestine and hepatopancreas are some of the reasons for causes of the disease.

Symptoms

• White faecal strings floating on the pond surface
• White/golden brown intestine
• Reduced feed consumption
• Growth retardation
• Reduces in average daily weight gain (ADG)
• Loose shell
• Hepatopancreas becomes whitish and soft.
• Diseased shrimp tend to be darker in color and after some time their bodies will lose firmness and become soft and limp
• Mortality during moulting

Remedies 

Cause of white faeces syndrome and treatment is uncertain. However reduced stocking density, proper water exchange together with better management practices will be helpful in evading White Fecal Disease.

Using of V Phages Growout immediately on observation of few strands on white fecal matter floating on water, or on check tray. Start this treatment to recover shrimps.