Location: Aquatic Animal Health ResearchTitle: Virulent Aeromonas hydrophila in channel catfish
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: http://advocate.gaalliance.org
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.