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由蜜蜂肠内居民Enterococcus sp.产生的外聚糖的抗菌活性. BE11对抗海洋鱼类病原体的防治

Eman H Zaghloul¹, Mohamed I A Ibrahim¹, Heba A H Zaghloul²

¹National Institute of Oceanography and Fisheries (NIOF), Cairo, Egypt.

BMC microbiology

|August 23, 2023

概括

蜜蜂肠道细菌产生具有抗菌性能的外聚糖 (EPS). 这项研究确定了Enterococcus sp. 作为在水产养殖中对抗鱼类病原体的潜在药物,BE11及其EPS.

科学领域:

微生物学微生物学
生物化学生物化学
水产养殖科学水产养殖科学

背景情况:

水产养殖中抗生素耐药性日益增长,需要新的抗菌剂.
成年蜜蜂 (Apis mellifera) 的肠道微生物群是乳酸细菌 (LAB) 的丰富来源,具有抗菌潜力.

研究的目的:

从蜜蜂肠中分离和描述LAB以生产抗菌化合物.
调查由选定的LAB分离物产生的外聚糖 (EPS) 对鱼类病原体的抗菌活性.

主要方法:

从蜜蜂肠道中分离和识别LAB,包括通过16SrRNA基因测序进行分子识别.
从BE11 (Enterococcus sp. 菌种) 隔离物中大量生产和物理化学表征EPS. ) 的情况.
使用切切扩散方法对没有细菌细胞的超级体 (CFS) 和EPS对鱼类病原体进行抗菌活性测试.

主要成果:

获得了12个LAB分离物;BE11被确定为Enterococcus sp.
物理化学分析显示,BE11-EPS是~87%的碳水化合物,含有银河糖,葡萄糖,拉姆诺斯,阿拉比诺斯和葡萄糖酸.
在BE11 CFS和EPS中,针对Pseudomonas fluorescens,Streptococcus agalactiae,Aeromonas hydrophila,Vibrio sp.和Staphylococcus epidermidis的抗菌活性显著.

结论:

肠球菌 (Enterococcus sp.) 是一种菌. BE11及其产生的EPS是对关键水产养殖鱼类病原体有效的抗菌剂.
这项研究展示了从蜜蜂肠道微生物群中获得的EPS的第一个化学特征,其潜在应用在抑制鱼类病原体方面.

关键词:

蜜蜂蜜蜂蜜蜂这些肠球菌 sp sp 的发生.在外聚糖类中,含有外聚糖类.鱼的病原体鱼的病原体乳酸细菌是一种乳酸细菌.

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