Blood chemistry and acid-base balance in rainbow trout Oncorhynchus mykiss with experimentally-induced acute bacterial gill disease.

摘要: Rainbow trout were experimentally infected with the causative agent of bacterial gill disease (BGD) (Flavobacterium branchiophilum) via bath challenge. All fish cannulated dorsal aortic catheters, had nasogastric tubes sutured in place for feeding, and maintained individually, plexiglass boxes a flow-through water system. Fish either fed, or unfed during trial. Acute changes blood gas, serum biochemistry clinical parameters monitored. By 24h post-challenge, BGD-infected that been fed significant hypoxemia, hypercapnia, increased ammonia, hypoosmolality, hyponatremia, hypochloremia, cough respiratory rates when compared to control levels. Unfed similar, but less severe gas changes, no electrolyte disturbances. The BGD-induced hypoxemia is likely exacerbated by oxygen demands brought on feeding. It not known what association feeding has development low ion levels trout. This first study report use fish, as opposed starved trout, obtaining chemistry values from indisturbed animals.