Effect of dietary egg lysozyme on improved growth performance, intestinal health, antioxidant capacity, and disease resistance in hybrid red tilapia (Oreochromis niloticus x O. mossambicus).

IF 1.8 3区 农林科学 Q2 VETERINARY SCIENCES
Mahmoud Radwan, Saad M Alsaiad, Ghadeer M Albadrani, Muath Q Al-Ghadi, Mohamed M Abdel-Daim, Mohamed M M El-Feky
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引用次数: 0

Abstract

This study evaluated the dietary lysozyme (DSLY) effect on the growth performance, health status, and disease resistance in hybrid red tilapia (Oreochromis niloticus x O. mossambicus). Fish were fed dietary DSLY at 0, 1, 2, and 3 g/kg diet (L0-L3, respectively) for 60 days, followed by a challenge with Streptococcus agalactiae. Fish-fed diets (DSLY) showed significant improvements in growth, carcass composition, digestive enzyme activity, and intestinal histomorphometry compared to control groups, specifically in the L2 and L3 groups. Fish fed with DSLY had lower gut bacterial counts than the control. Fish-fed DSLY positively affected hemato-biochemical indices compared to the control group, especially in the 2 and 3 g/kg diets. Comparing fish fed DSLY to those fed 0 g/kg lysozyme, particularly in the 2 and 3 g/kg diets, revealed a significant decrease in MDA levels along with an increase in antioxidant (SOD and CAT) and immunological indices. Fish-fed DSLY, after the challenge with S. agalactiae showed a lower mortality rate than the control. The histological structure of the intestines and stomach of fish that fed DSLY improved. These results suggest that fish-fed DSLY enhanced their intestinal health and growth, boosted their immune responses, and raised their resistance to S. agalactiae.

饲料中添加鸡蛋溶菌酶对杂交红罗非鱼生长性能、肠道健康、抗氧化能力和抗病能力的影响
研究了饲料中溶菌酶(DSLY)对杂交红罗非鱼(Oreochromis niloticus x O. mossambicus)生长性能、健康状况和抗病性的影响。分别饲喂0、1、2和3 g/kg饲料(0 ~ l3)的DSLY 60天,然后用无乳链球菌攻毒。与对照组相比,饲粮(DSLY)显著改善了鱼的生长、胴体组成、消化酶活性和肠道组织形态,尤其是L2和L3组。饲喂DSLY的鱼的肠道细菌数量低于对照组。与对照组相比,饲粮DSLY对血液生化指标有积极影响,特别是在2和3 g/kg饲粮中。与饲喂0 g/kg溶菌酶的鱼相比,特别是饲喂2和3 g/kg溶菌酶的鱼,MDA水平显著降低,抗氧化(SOD和CAT)和免疫指标显著升高。用无乳沙门氏菌攻毒后,鱼饲DSLY的死亡率低于对照。饲喂DSLY后,鱼的肠道和胃的组织结构得到改善。这些结果表明,饲喂DSLY可改善鱼的肠道健康和生长,增强鱼的免疫反应,提高鱼对无乳链球菌的抵抗力。
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来源期刊
Veterinary Research Communications
Veterinary Research Communications 农林科学-兽医学
CiteScore
2.50
自引率
0.00%
发文量
173
审稿时长
3 months
期刊介绍: Veterinary Research Communications publishes fully refereed research articles and topical reviews on all aspects of the veterinary sciences. Interdisciplinary articles are particularly encouraged, as are well argued reviews, even if they are somewhat controversial. The journal is an appropriate medium in which to publish new methods, newly described diseases and new pathological findings, as these are applied to animals. The material should be of international rather than local interest. As it deliberately seeks a wide coverage, Veterinary Research Communications provides its readers with a means of keeping abreast of current developments in the entire field of veterinary science.
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