Isolation, Identification, and Characterization of Aeromonas veronii from Chinese Soft-Shelled Turtle (Trionyx sinensis)
文献类型： 外文期刊
作者： Hu, Xiaowei 1 ; Xiao, Zidong 2 ; Li, Bo 3 ; Xue, Mingyang 2 ; Jiang, Nan 2 ; Fan, Yuding 2 ; Chen, Peng 4 ; Qi, Feng 4 ; Kong, Xianghui 1 ; Zhou, Yong 2 ;
作者机构： 1.Henan Normal Univ, Coll Fisheries, Dept Fisheries Dev, Xinxiang 453000, Peoples R China
2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Peoples R China
3.Wuhan Acad Agr Sci, Wuhan 430071, Peoples R China
4.Inst Fishery Res Xinjiang Uygur Autonenous Reg, Urumqi 830099, Peoples R China
关键词： Chinese soft-shelled turtle; Aeromonas veronii; isolation; identification; histopathological analysis
期刊名称：MICROORGANISMS （ 影响因子：4.5； 五年影响因子：4.8 ）
ISSN：
年卷期： 2023 年 11 卷 5 期
页码：
收录情况： SCI
摘要： Aeromonas veronii is widespread in aquatic environments and is capable of infecting various aquatic organisms. A. veronii infection is lethal for Chinese soft-shelled turtles (Trionyx sinensis, CSST). We isolated a gram-negative bacterium from the liver of diseased CSSTs, which was named XC-1908. This isolate was identified as A. veronii based on its morphological and biochemical characteristics, and 16S rRNA gene sequence analysis. A. veronii was pathogenic for CSSTs with an LD50 of 4.17 x 10(5) CFU/g. The symptoms of CSSTs artificially infected with isolate XC-1908 were consistent with those of the naturally infected CSSTs. The levels of total protein, albumin, and white globule in the serum samples of the diseased turtles were decreased, whereas those of aspartate aminotransferase, alanine aminotransferase, and alkaline phosphatase were elevated. Moreover, the diseased CSSTs exhibited the following histopathological changes: the liver contained numerous melanomacrophage centers, renal glomerulus were edematous, intestinal villi were shed, and in oocytes, the number of vacuoles increased and red-rounded particles were observed. Antibiotic sensitivity tests revealed that the bacterium was sensitive to ceftriaxone, doxycycline, florfenicol, cefradine, and gentamicin, and resistant to sulfanilamide, carbenicillin, benzathine, clindamycin, erythromycin, and streptomycin. This study provides control strategies to prevent outbreaks of A. veronii infection in CSSTs.
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