Isolation and identification of fish pathogen Edwardsiella tarda from mariculture in China
By Jingfan Xiao, Qiyao Wang, Qin Liu, Xin Wang, Huan Liu, Yuanxing Zhang. 2008
138 citations recorded by the source corpus.
The causative agent was isolated from diseased turbots (Scophthalmus maximus) stricken by a high-mortality outbreak of bacterial septicaemia occurring in a mariculture farm in Yantai, a northern coastal city of China. Seven pure isolates, namely EH-15, EH-103, EH-107, EH-202, EH-203, EH-305 and EH-306, belonged to Edwardsiella tarda. The phenotypic features of the cultures were analysed extensively. Three of the isolates showed high 16S rDNA sequence similarities with E. tarda sequence (GenBank accession no. EF467289). However, unlike the E. tarda ATCC 15947, all the isolates, except EH-15, contained a novel large plasmid sized about 23.7 kb. Furthermore, pathogenicity of the isolates was addressed by experimental challenges with fish models. The isolates exhibited strong virulence to swordtail fish with LD50 ranging between 3.8 × 103 and 3.8 × 105 CFU g−1, and EH-202 displaying the lowest LD50 value among them. Antibiotic susceptibilities of E. tarda isolates were assayed. Compared with E. tarda ATCC 15947, the isolates displayed strong resistance to chloramphenicol, and the probable dominant chloramphenicol resistance determinant was cat III. Depicting the main biological properties of turbot-borne E. tarda strains in China, the study provided useful information for further unveiling their pathogenic mechanisms.
Subfields: Endocrinology, Immunology, Microbiology
View Paper: https://www.semanticscholar.org/paper/9913befbbc11a12526164b727a628f08ae83135d
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In Immunology
Citations in the corpus
- Antimicrobial resistance in aquaculture: a crisis for concern (2020, background): “Edwardsiella tarda, responsible for the major outbreak of septicaemia in trout, Scophthalmus maximus from mariculture farm, exhibited strong resistance to chloramphenicol due to the presence of resistant determinant, cat III (Xiao et al. 2009).”