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Immune response enhancement in channel catfish, Ictalurus punctatus, using beta-glucan from Schizophyllum commune
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Immune response enhancement in channel catfish, Ictalurus punctatus, using beta-glucan from Schizophyllum commune
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Dissertation
Immune response enhancement in channel catfish, Ictalurus punctatus, using beta-glucan from Schizophyllum commune
1993
Overview
$\\beta$-Glucans have been shown to have immunopotentiating effects in a variety of animal species. The ability of $\\beta$-glucan derived from Schizophyllum commune to enhance immune responses of channel catfish was determined by antibody to the bacterial pathogen Edwardsiella ictaluri after immersion challenge, accumulation of phagocytic cells in the peritoneal exudate, accumulation of intraepithelial leucocytes in the gut wall, and mortality in challenge trials. Intraperitoneal (IP) injection of $\\beta$-glucan resulted in an initial accumulation of neutrophils in the peritoneal exudate that declined over a four day period. However, macrophage numbers increased over the four day period and were more abundant in the exudate on day four post-injection. Fish fed rations supplemented with 0.1% $\\beta$-glucan had significantly higher antibody titers to E. ictaluri than fish fed control or 1.0% $\\beta$-glucan supplemented rations. This response was found to be related to the weight of the fish. In immersion challenge trials using E. ictaluri, $\\beta$-glucan-supplemented rations did not significantly alter mortality of fish weighing 18 $\\pm$ 2 g when compared to catfish fed control rations. $\\beta$-Glucan may be useful when used in conjunction with vaccines to enhance their effectiveness.
Publisher
ProQuest Dissertations & Theses
Subject
ISBN
9798206506754
