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ARS Home » Southeast Area » Stoneville, Mississippi » Warmwater Aquaculture Research Unit » Research » Publications at this Location » Publication #303719

Title: Effects of a phytogenic feed additive on growth and susceptibility of channel catfish to Edwardsiella ictaluri and levels of mannose and rhamnose binding lectin

item Peterson, Brian
item PEATMAN, ERIC - Auburn University
item OURTH, DON - University Of Memphis
item BELTRAN, R - Biomin America, Inc
item SANTOS, G - Biomin America, Inc
item Waldbieser, Geoffrey - Geoff

Submitted to: International Congress on the Biology of Fish
Publication Type: Abstract Only
Publication Acceptance Date: 4/2/2014
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: A study was conducted to investigate the effect of essential oils (EO) on growth and disease susceptibility to Edwardsiella ictaluri. Weight gain and food conversion ratio were similar. After exposing fish to virulent E. ictaluri, survival was higher (69.5 vs 48.4%) in fish fed EO (P < 0.05). In the EO fish, plasma mannose binding lectin (MBL) levels were similar to non-challenged fish but higher than control fed fish one day after challenge (P < 0.001). On d 14, MBL mRNA levels were upregulated 15-fold in fish fed EO compared to control and non-challenged fish (P < 0.001). Intestine rhamnose binding lectin 1 (RBL1) mRNA levels were upregulated 6.6 and 3.2-fold in fish fed EO (P < 0.05) on days 7 and 14, respectively. The results demonstrate that essential oils improve survival of channel catfish challenged with E. ictaluri. The mechanisms through which essential oils improve survival may involve MBL and RBL1.