畜牧兽医学报 ›› 2020, Vol. 51 ›› Issue (7): 1756-1763.doi: 10.11843/j.issn.0366-6964.2020.07.028

• 基础兽医 • 上一篇    下一篇

噬菌体降低铜绿假单胞菌所致腐蛋的效果

刘晓文1,2, 张庆2*, 宋新慧2, 骆延波2, 胡明2, 李璐璐2, 齐静1,2, 张印2, 赵效南2, 刘玉庆1,2*   

  1. 1. 山东师范大学生命科学学院, 济南 250014;
    2. 山东省农业科学院畜牧兽医研究所, 济南 250100
  • 收稿日期:2019-11-12 出版日期:2020-07-25 发布日期:2020-07-22
  • 通讯作者: 刘玉庆,主要从事细菌抗药性分析与噬菌体治疗研究,E-mail:liuiuqing@163.com;张庆,主要从事噬菌体治疗研究,E-mail:zhangqingchina@163.com
  • 作者简介:刘晓文(1995-),女,山东枣庄人,硕士,主要从事噬菌体生物学性质和应用研究,E-mail:Juneliu22@163.com
  • 基金资助:
    国家重点研发计划(2018YFD0500500;2016YFD0501300);山东省重大科技创新工程(2019JZZY010719);山东省农业科学院农业科技创新工程(GXGC2017A01;CXG2018E10);国家科技重大专项(2018ZX10733402-013);传染病预防控制国家重点实验室开放课题(2019SKLID317)

Effect of Phage on the Reduction of Rotten Eggs Caused by Pseudomonas aeruginosa

LIU Xiaowen1,2, ZHANG Qing2*, SONG Xinhui2, LUO Yanbo2, HU Ming2, LI Lulu2, QI Jing1,2, ZHANG Yin2, ZHAO Xiaonan2, LIU Yuqing1,2*   

  1. 1. School of Life Sciences, Shandong Normal University, Jinan 250014, China;
    2. Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Jinan 250100, China
  • Received:2019-11-12 Online:2020-07-25 Published:2020-07-22

摘要: 铜绿假单胞菌是孵化过程中造成腐蛋的主要病原菌,拟尝试用裂解性噬菌体防治。选用腐蛋中筛选的铜绿假单胞菌PA-MH12,以此为宿主从河水中筛选到1株裂解性噬菌体MH12-Q,对其进行了生物学特性研究,体外进行了对铜绿假单胞菌所致腐蛋的防控效果试验。结果显示:噬菌体MH12-Q属于肌尾噬菌体科(Myoviridae),效价可达到1013pfu·mL-1,完全裂解效价(CLC)为1010pfu·mL-1,最适生长温度为37℃,pH稳定性好,最适pH为6~8,且其在pH4~10的效价都能维持在较高的水平。最佳感染复数(OMOI)为0.001,感染宿主的潜伏期为30 min,爆发期为70 min。噬菌体MH12-Q可使高浓度铜绿假单胞菌的感染率从70%降低到40%。铜绿假单胞菌噬菌体MH12-Q的生物学性质适合生产应用,对孵化场腐蛋具有较好的防控作用,能够提高感染铜绿假单胞菌的鸡胚成活率。

关键词: 铜绿假单胞菌, 腐蛋, 裂解性噬菌体, 生物学性质, 防治

Abstract: Pseudomonas aeruginosa is the main pathogen causing rotten eggs during incubation, we attempted to control it with lytic phage. In this work, a strain of virulent phage MH12-Q was sifted from the river water sample by using Pseudomonas aeruginosa PA-MH12 isolated from the rotten eggs. The biological characteristics of the phage were studied and its prevention and control effect on Pseudomonas aeruginosa induced rotten egg were tested. The phage MH12-Q was sequenced and identified as Myoviridae. The titer of phage MH12-Q can reach 1013pfu·mL-1, the complete lysis concentration (CLC) of phage MH12-Q is 1010pfu·mL-1, and the optimal growth temperature is 37℃. The optimum pH is 6-8 for the stability of the phage and its titer can maintain a high level at pH 4-10. Its optimal multiplicity of infection (OMOI) is 0.001, the incubation period of infected hosts is 30 min, and the outbreak period is 70 min. The phage with the biological properties above can reduce the infection rate of high concentration Pseudomonas aeruginosa from 70% to 40%. The biological properties of Pseudomonas aeruginosa phage MH12-Q are suitable for production and application, which has a good prevention and control effect on rotten eggs in hatchery and can improve the survival rate of chicken embryos infected with Pseudomonas aeruginosa.

Key words: Pseudomonas aeruginosa, rotten eggs, lytic phage, biological property, prevention and control

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