›› 2017, Vol. 29 ›› Issue (12): 1978-1985.DOI: 10.3969/j.issn.1004-1524.2017.12.04

• Animal Science • Previous Articles     Next Articles

Isolation, identification and antibiotic sensitivity of Pseudomonas putida from hybrid sturgeon (Huso dauricus×Acipenser schrenckii♂)

YANG Yuanyuan1, YANG Yibin2, *, CAO Haipeng3, FANG Wei1, LIN Hanqun1, YANG Xianle3, AI Xiaohui2   

  1. 1. Guangdong Provincial Center for Aquatic Animal Disease Prevention and Control, Guangzhou 510222, China;
    2. Yangtze River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Wuhan 430223, China;
    3. Shanghai Ocean University, Shanghai 201306, China
  • Received:2017-04-11 Online:2017-12-20 Published:2018-01-08

Abstract: The isolation, identification and antibiotic sensitivity of pathogen from the morbid hybrid sturgeon were conducted to provide a reference for control and prevention disease for hybrid sturgeon. The pathogenic bacteria were isolated and purified from liver, kidney, spleen and intestinal tract of hybrid sturgeon. The biochemical identification and 16S rRNA gene sequence determination and the artificial infection test were used to identify whether the strain XY4 was the pathogen, and the antimicrobial susceptibility test was conducted by K-B method. The results showed that strain XY4 was the pathogens of hybrid sturgeon, the LD50 of the isolate was counted to 1.30×106 cfu·g-1. According to morphological and biochemical characteristics as well as the result of 16S rRNA gene sequence analysis, the isolated strain XY4 was Pseudomonas putida. Strain XY4 was susceptible to cefadroxil, florfenicol, doxycycline and other 6 kinds of antibiotics. The disease caused by Pseudomonas putida can be prevented by above sensitive drugs in fishery farming.

Key words: Pseudomonas putida, hybrid sturgeon(Huso dauricus♀×, Acipenser schrenckii♂), isolation and identification, antimicrobial susceptibility

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