Acta Agriculturae Zhejiangensis ›› 2022, Vol. 34 ›› Issue (8): 1599-1608.DOI: 10.3969/j.issn.1004-1524.2022.08.04

• Animal Science • Previous Articles     Next Articles

Isolation, identification and biological characteristics of rabbit-derived Escherichia coli bacteriophage

WANG Zhipeng1(), ZHAO Jian2, HUANG Pan2, CUI Xuemei2, NAN Li2, SONG Houhui1, BAO Guolian2, LIU Yan2,*   

  1. 1. Key Laboratory of Application Technology of Ecological Green and Healthy Livestock and Poultry Breeding in Zhejiang Province, Zhejiang Provincial Engineering Laboratory for Animal Health Inspection and Internet Technology, College of Animal Science and Technology·College of Veterinary Medicine, Zhejiang A&F University, Hangzhou 311300, China
    2. Institute of Animal Husbandry and Veterinary Medicine, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China
  • Received:2021-04-03 Online:2022-08-25 Published:2022-08-26
  • Contact: LIU Yan

Abstract:

In this study, one enteropathogenic Escherichia coli strain was isolated and identified via Gram staining and PCR from a rabbit farm in Zhejiang Province, China, which was named as ZJE1. ZJE1 was sensitive to streptomycin and ciprofloxacin. Four bacteriophages were isolated with the ZJE1 strain, which were named as ZRP2, ZRP3, ZRP4 and ZRP5, respectively. The biological and morphological characteristics of these bacteriophages were analyzed. It was shown that the bacteriophages were composed of hexagonal head, contractible tail sheath and tail tube. All the four bacteriophages belonged to Myoviridae family. The host spectrum, optimal multiplicity of infection (MOI), pH stability, thermal stability and one-step growth curve of these four bacteriophages were determined by double-layer plate method. The results showed that ZRP2, ZRP3, ZRP4 and ZRP5 all showed good activity under 37-55 ℃ with high host specificity. ZRP2, ZRP3 could maintain good activity under pH value of 7, while ZRP4 and ZRP5 could maintain good activity under pH value of 5-7. ZRP2, ZRP3, ZRP5 showed good lytic activity in vitro, with incubation period of 11-19 min. These findings provided research basis for the treatment of rabbit enteropathogenic E. coli with bacteriophage.

Key words: enteropathogenic Escherichia coli, bacteriophage, isolation and identification, biological characteristics

CLC Number: