Tilapia Lake Virus (TiLV)

The disease

about 1 year ago
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There are many knowledge gaps linked to TiLV. More research is required to determine whether TiLV is carried by non-tilapine species and other organisms such as piscivorous birds and mammals, and whether it can be transmitted through frozen tilapia products.

The disease shows highly variable mortality, with outbreaks in Thailand triggering the deaths of up to 90 percent of stocks. Infected fish often show loss of appetite, slow movements, dermal lesions and ulcers, ocular abnormalities, and opacity of lens.As a reliable diagnostic test for TiLV is available, it should be applied to rule out TiLV as the causal agent of unexplained mortalities. TiLV belongs to the Orthomyxoviridae family of viruses, which is also the same family to which the Infectious Salmon Anaemia virus belongs, which wrought great damage on the salmon farming industry. In May 2017, The Network of Aquaculture Centres in Asia-Pacific (NACA) released a TiLV Disease Advisory and the World Organisation for Animal Health (OIE) released a Disease Card. The WorldFish Center also released a Factsheet: TiLV: what to know and do, this month.

Tilapia Lake Virus (TiLV)

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