›› 2018, Vol. 30 ›› Issue (2): 203-210.DOI: 10.3969/j.issn.1004-1524.2018.02.04

• Animal Science • Previous Articles     Next Articles

Isolation and identification of Streptococcus iniae from sturgeon and its pathological lesions of infection

ZHENG Liping1, GENG Yi1, *, LEI Xueping1, YU Zehui1, HUANG Xiaoli2, CHEN Defang2, OUYANG Ping1, CAO Shiqi1, HAN Rui1   

  1. 1. College of Veterinary Medicine, Sichuan Agricultural University, Wenjiang 611130, China;
    2. Fisheries Department, Sichuan Agricultural University, Wenjiang 611130, China
  • Received:2017-07-14 Online:2018-02-20 Published:2018-02-11

Abstract: During June of 2016, a serious infectious disease characterized by hemorrhage and neurological symptoms outbroke in sturgeon farms of Pengzhou, Sichuan Province. The main pathologic lesions were degeneration, necrosis, hemorrhage and infiltration of the inflammation cells that was particularly marked in liver, kidney, heart and brain. A pathogenic bacteria was isolated from the viscera of sick sturgeons and the isolate was identified as Streptococcus iniae by physiological and biochemical characteristics, phylogenetic analysis and specific PCR detection, its pathogenicity was confirmed by artificial infection test. The drug sensitivity results showed that the isolate was sensitive to florfenicol, gentamicin, doxycycline, etc., but resistant to tetracycline and neomycin.

Key words: Streptococcus iniae, isolation and identification, drug sensitivity, pathological lesion, sturgeon

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