水生生物学报Issue(4)：744-750,7.DOI:10.7541/2013.89
一株多重耐药鳗源肺炎克雷伯菌的分离鉴定
ISOLATION AND IDENTIFICATION OF A MULTIPLE-DRUG RESISTANT KLEBSIELLA PNEUMONIAE FROM ANGUILLA MARMORATA
摘要
Abstract
A strain of gram-negative bacteria, named HM2, was isolated from the liver of a diseased Anguilla marmo-rata. The LD50 of 96h was 9.98×107CFU/mL. HM2 was identified as Klebsiella pneumoniae according to its culture specific and physio-biochemical characteristics as well as ATB Expression systematic identification. By using the gen-eral primers of 16S rRNA, the gene fragments were amplified by PCR with a size of 1393 bp (GenBank No. JX282908). The amplified gene was sequenced and compared with those related sequences in GenBank and the phylogenetic tree was constructed on the basis of the sequencesof 16S rRNAs. The BLAST result showed that HM2 had the highest ho-mologies (100%), with sequence of K. pneumoniae, and the phylogenetic tree result revealed further that this strain clustered together with K. pneumoniae. On the other hand, the results of artificial infection experiments revealed that HM2 had a strong ability of the diseases induction. By testing with twenty antimicrobial agents, HM2 was found to be with high sensitivity to imipenem, streptomycin and amikacin; while it was resistant to seventeen other antimicrobial agents, including ampicillin, amoxicillin-clavulanic acid, cefalotin, ceftriaxone, cefotaxime, cefoxitin, sulfonamides, trimethoprim-sulfamethoxazole, rifampin, nalidixic acid, ciprofloxacin, norfloxacin, ofloxacin, nitrofurantoin, tetracy-cline, doxycycline and chloramphenicol. The guidelines for the rational use of drugs are urgently needed to prevent the progress of antimicrobial resistance in aquaculture in future.关键词
花鳗鲡/肺炎克雷伯菌/致病性/鉴定/耐药Key words
Anguilla marmorata/Klebsiella pneumoniae/Pathogenicity/Identification/Antimicrobial resistance分类
农业科技引用本文复制引用
谭爱萍,邓玉婷,姜兰,吴雅丽,薛慧娟,王伟利,罗理,赵飞..一株多重耐药鳗源肺炎克雷伯菌的分离鉴定[J].水生生物学报,2013,(4):744-750,7.基金项目
公益性行业(农业)科研专项(201203085) （农业）
广东省科技计划项目(2011B020307001) （2011B020307001）
中国水科院基本科研业务费(2012 A0507)资助 （2012 A0507）
