2.5. Some common diseases and their treatments

2.5.6. Curved body disease (Cramp tail syndrome)

* Signs:
Shrimp is cramped; its tail curves towards the abdomen and does not stretch out.

* Pathogen:
– The disease usually happens when shrimp is pulled out of the water suddenly in cold or hot, sunny days, when air temperature is largely different from water temperature.
– The disease can be caused by nutritional factors, such as the lack of micronutrients in the diet for shrimp.

* Preventions – Treatments:
– Avoid shocks in shrimp caused by temperature, ensure the ponds’ depths, and avoid catching shrimp on days of too high temperatures or too low temperatures.

– Provide mineral supplements for shrimp if the cause is from nutritional, dietary factors (micronutrients deficiency).

Source: Temporary process for safe brackish-water shrimp farming in areas affected by diseases in Vietnam. According to The Official Dispatch No. 10/TCTS-NTTS. January 6th, 2015. Vietnamese Directorate of Fisheries

Viet Linh 2015. Translated by Sonia Linh V.