Lineage, Antimicrobial Resistance and Virulence of Citrobacter spp

Pathogens
Liyun LiuChuan Zhao

Abstract

Citrobacter spp. are opportunistic human pathogens which can cause nosocomial infections, sporadic infections and outbreaks. In order to determine the genetic diversity, in vitro virulence properties and antimicrobial resistance profiles of Citrobacter spp . , 128 Citrobacter isolates obtained from human diarrheal patients, foods and environment were assessed by multilocus sequence typing (MLST), antimicrobial susceptibility testing and adhesion and cytotoxicity testing to HEp-2 cells. The 128 Citrobacter isolates were typed into 123 sequence types (STs) of which 101 were novel STs, and these STs were divided into five lineages. Lineages I and II contained C.freundii isolates; Lineage III contained all C.braakii isolates, while Lineage IV and V contained C.youngae isolates. Lineages II and V contained more adhesive and cytotoxic isolates than Lineages I, III, and IV. Fifty-one of the 128 isolates were found to be multidrug-resistant (MDR, ≥3) and mainly distributed in Lineages I, II, and III. The prevalence of quinolone resistance varied with Lineage III (C.braakii) having the highest proportion of resistant isolates (52.6%), followed by Lineage I (C.freundii) with 23.7%. Seven qnrB variants, including two new alleles (qnrB93 a...Continue Reading

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Citations

Sep 14, 2021·Frontiers in Cellular and Infection Microbiology·Liyun LiuRuiting Lan

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Methods Mentioned

BETA
PCR

Software Mentioned

SPSS
eBURST

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