Over half of the salmon consumed
globally are farm-raised, and in most cases are given vaccines. The
vaccines make large-scale production feasible by preventing infections.
Currently, the vaccines used contain oil adjuvants, such as mineral
oil. In rodents, a single injection of adjuvant hydrocarbon oil induces
lupus-like systemic autoimmune syndrome, characterized by
autoantibodies, immune complex glomerulonephritis, and arthritis.
oil. In rodents, a single injection of adjuvant hydrocarbon oil induces
lupus-like systemic autoimmune syndrome, characterized by
autoantibodies, immune complex glomerulonephritis, and arthritis.
A study attempted to find out if farmed salmon that received
oil-adjuvanted vaccine developed similar autoimmune syndromes. Sera and
tissues were collected from vaccinated or unvaccinated farmed salmon
and wild salmon.
The researchers found that autoimmune disorders similar to those
seen in the mouse model were common in vaccinated farmed Atlantic
salmon. This could have a significant impact on production loss,
disease of previously unknown etiology, and future strategies of
vaccines and salmon farming.
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