Disease of the yellow head
The disease of the yellow head (YHD, acronym of yellowhead disease ) is a viral infection which affects the Crevette S, in particular the striped giant Crevette ( Penaeus monodon ), one of the two principal shrimp species of breeding. This disease is highly lethal and contagious, killing shrimps quickly. Blazes of this disease swept in the space of a few days of the whole populations in many firm aquicultural which raised the species Panaeus monodon , i.e. in particular the breedings of the South-East Asia. In language Thai E, one calls this disease Hua leung .
This disease is caused by the virus of the yellow head (YHV, acronym of yellowhead virus ), a virus ARN simple bit of related positive direction to the Coronavirus and the Arterivirus. A virus very narrowly related is the Virus associated with the gills (GAV, acronym of Gill-associated virus ), which is the standard species of the kind Okavirus .
The Céphalothorax of infected shrimps becomes yellow at the conclusion one unusual period of nourrissage intense which is completed abruptly, and the shrimps then dying women agglomerate close to the surface of the basins before dying. The disease of the yellow head results in the death of shellfish in the space from two to four days.
The disease of the yellow head was announced for the first time in Thailand in 1990, virus narrowly related GAV was discovered in 1995 during an epidemic connected with the disease of the yellow head in the shrimp breedings Australia NS.
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