title: Effect of yeast polysaccharide on some hematologic parameter and gut morphology in channel catfish (Ictalurus punctatus).
abstract: A study was conducted to investigate the effect of dietary yeast polysaccharides on some hematologic parameters and intestinal morphology of channel catfish. Channel catfish were fed diets containing yeast polysaccharides at 0 (control), 0.1, 0.2, or 0.3 % for 7 weeks. Each diet was provided to 10 channel catfish specimens (5.82 ± 0.13 g initial weight) replicated 3 times in individual 250 L fiberglass tanks. Some hematologic parameters, leukocyte phagocytic activity, and intestinal morphology were monitored. After 7 weeks of trial, 0.2 % yeast polysaccharides resulted in significantly higher (P < 0.05) monocyte numbers. Furthermore, fish fed 0.2 % yeast polysaccharide diet had higher (P < 0.05) phagocytic rate of leukocyte. And 0.3 % yeast polysaccharide enhanced (P < 0.05) phagocytic index of leukocyte. Histological evaluation showed yeast polysaccharide supplementation increased the height of intestine fold (0.1, 0.2 and 0.3 %) and the thick of muscular layers (0.2 %) in intestine (P < 0.05). In addition, 0.1 and 0.3 % yeast polysaccharide supplementation improved the number of goblet cells (P < 0.05). The results of this trial indicate that yeast polysaccharides supplementation could affect blood monocytes, improve leukocytes phagocytic activity, and the development of intestine in channel catfish.
authors.affiliation: Hubei Key Laboratory of Animal Nutrition and Feed Science, Department of Feed Science, Wuhan Polytechnic University, Wuhan, 430023, People's Republic of China. zhuhuiling2004@sina.com
authors.forename: Huiling
authors.initials: H
authors.lastname: Zhu
authors.forename: Huiyu
authors.initials: H
authors.lastname: Liu
authors.forename: Jing
authors.initials: J
authors.lastname: Yan
authors.forename: Rui
authors.initials: R
authors.lastname: Wang
authors.forename: Lihe
authors.initials: L
authors.lastname: Liu
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D004032:Diet / Q000662:veterinary; D062610:Fungal Polysaccharides / Q000737:chemistry / Q000494:pharmacology*; D007059:Ictaluridae / Q000033:anatomy & histology* / Q000097:blood*; D007962:Leukocytes; D010587:Phagocytosis / Q000187:drug effects; D056692:Prebiotics; D015003:Yeasts / Q000737:chemistry*
chemical_list: D062610:Fungal Polysaccharides; D056692:Prebiotics