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What are the prevention and control methods for enteritis in yellow catfish?
(1) Pathogen: Aeromonas punctata. (2) Symptoms: The diseased fish has a distended abdomen and red, swollen anus; when the abdomen is gently pressed, yellow mucus flows from the anus, and the diseased fish swims alone away from the group. When the abdomen is cut open, in mildly affected fish the esophagus and anterior intestine are congested and inflamed, while in severe cases the entire intestine is inflamed and pale red