scholarly journals Virulence of Aeromonas hydrophila to channel catfish Ictaluras punctatus fingerlings in the presence and absence of bacterial extracellular products

2011 ◽  
Vol 95 (3) ◽  
pp. 209-215 ◽  
Author(s):  
JW Pridgeon ◽  
PH Klesius
Keyword(s):  
Channel Catfish ◽  
Aeromonas Hydrophila ◽  
Extracellular Products ◽  
Presence And Absence

Recombinant goose-type lysozyme in channel catfish: Lysozyme activity and efficacy as plasmid DNA immunostimulant against Aeromonas hydrophila infection

2013 ◽  
Vol 35 (4) ◽  
pp. 1309-1319 ◽  
Author(s):  
Julia W. Pridgeon ◽  
Phillip H. Klesius ◽  
Paul J. Dominowski ◽  
Robert J. Yancey ◽  
Michele S. Kievit
Keyword(s):  
Channel Catfish ◽  
Plasmid Dna ◽  
Aeromonas Hydrophila ◽  
Lysozyme Activity

Conservation, Ecology, and Management of Catfish: The Second International Symposium

2011 ◽  
Keyword(s):  
United States ◽  
Body Condition ◽  
Ictalurus Punctatus ◽  
Channel Catfish ◽  
Aeromonas Hydrophila ◽  
Condition Index ◽  
The United States ◽  
Southern United States ◽  
Conservation Ecology ◽  
Columnaris Disease

<em>Abstract</em>.—U.S. Game and Fish agencies and farm-pond owners throughout the United States use commercially produced channel catfish <em>Ictalurus punctatus </em>fingerlings transported from the southern United States for supplemental stocking. We conducted six trials to examine whether pathogen load, body condition, and select environmental factors influence fingerling survival following transport and cage stocking. Fingerlings were sampled prior to stocking and weekly for the following 3 weeks. Weights and lengths were measured, and a relative condition index was used to quantify body condition. Skin scrapings and gill clippings were examined microscopically for pathogens, and posterior kidney was assayed for <em>Aeromonas hydrophila</em>. Mortality was either less than 10% (four trials) or catastrophic (two trials). A Columnaris disease epizootic was associated with ~50% mortality in one trial, and a red sore disease epizootic was associated with ~80% mortality in another. Body condition or other pathogens, present initially or acquired in study ponds, were not associated with high mortality. The first week appears to be critical for the survival of channel catfish fingerlings following transport.

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