Diagnostic challenges II: marine and freshwater ornamentals

摘要

You are called by a local fish farmer who has just ventured into the area of hybrid striped bass grow out. Approximately 4 days ago the received his first shipment of nearly 100,000 fingerlings. This morning he noted high mortalities. You jump into your new aquatic animal field service vehicle and speed over to his farm. Your first glance at the fresh-dead fish shows that most have skin and fins erosions (some into the underlying muscle) and the gills look necrotic. Some fish's lesions appear to be white plaques with a reddened margin.