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Yellowhead disease

Yellowhead disease (YHD) is a viral infection of shrimp and prawn, in particular of the giant tiger prawn, one of the two major species of farmed shrimp. The disease is caused by the Yellow head virus (YHV), a positive-strand RNA virus related to coronaviruses and arteriviruses.

Clinical
The cephalothorax of infected shrimp turns yellow after a period of unusually high feeding activity ending abruptly, and the then moribund shrimps congregate near the surface of their pond before dying. YHD leads to death of the animals within two to four days. ==History==
History
YHD had been reported first from Thailand in 1990, the closely related GAV has been discovered in 1995 during a yellowhead-like disease in Australian shrimp farms. ==References==
Source: Wikipedia ↗
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