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ARS Home » Southeast Area » Auburn, Alabama » Aquatic Animal Health Research » Research » Publications at this Location » Publication #331015

Research Project: Pathogen Characterization, Host Immune Response and Development of Strategies to Reduce Losses to Disease in Aquaculture

Location: Aquatic Animal Health Research

Title: Virulent Aeromonas hydrophila in channel catfish

item Zhang, Dunhua

Submitted to: Global Aquaculture Advocate
Publication Type: Popular Publication
Publication Acceptance Date: 3/1/2016
Publication Date: 3/14/2016
Citation: Zhang, D. 2016. Virulent Aeromonas hydrophila in channel catfish. Global Aquaculture Advocate [online]. Available:

Interpretive Summary:

Technical Abstract: In this study, we investigated factors that predisposed catfish to motile aeromonas septicemia (MAS) caused by virulent Aeromonas hydrophila (vAh). Our results revealed that wounding on fish body surface was a prerequisite for vAh infection and disease development. A reproducible waterborne challenge model was established. In this model, part of the adipose fin (Af) of catfish was clipped to create relatively-uniform wounds; Af-clipped fish were then immersed in vAh infected water (approximately 2 x 107 colony forming units ml-1 of water) for one hour. This challenge method resulted in approximately 90% mortality in three days and infected fish showed typical clinical signs of MAS observed in the field. The waterborne challenge model will facilitate urgently-needed studies on MAS prevention and control.