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Virulomic Analysis of Multidrug-Resistant Klebsiella pneumoniae Isolates and Experimental Virulence Model Using Danio rerio (Zebrafish)

by Espinoza, Evelyn Sanchez , Côrtes, Marina Farrel , Rizek, Camila Fonseca , de Maio Carrilho, Claudia M. D. , Fernandes, Bianca H. Ventura , Neto, Lauro V. Perdigão , Noguera, Saidy Vasconez , Duarte, Edson Luiz Tarsia , Marchi, Ana Paula , Costa, Silvia Figueiredo , Guimarães, Thais , Trindade, Priscila A.

in Adaptation / Animal models / Cardiotoxicity / Colistin / Danio rerio / Drug resistance / Efflux / Embryos / Gene expression / Gene sequencing / Genetic engineering / Genomes / K. pneumoniae / Klebsiella / Klebsiella pneumoniae / MDR / MLST / Mortality / Multidrug resistance / Nosocomial infections / Phenotypes / Pili / Siderophores / Virulence / virulence factor / Virulence factors / WGS / Whole genome sequencing / Zebrafish

2022

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Virulomic Analysis of Multidrug-Resistant Klebsiella pneumoniae Isolates and Experimental Virulence Model Using Danio rerio (Zebrafish)

2022

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Virulomic Analysis of Multidrug-Resistant Klebsiella pneumoniae Isolates and Experimental Virulence Model Using Danio rerio (Zebrafish)

2022

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Journal Article

Virulomic Analysis of Multidrug-Resistant Klebsiella pneumoniae Isolates and Experimental Virulence Model Using Danio rerio (Zebrafish)

Espinoza, Evelyn Sanchez,

Côrtes, Marina Farrel,

Rizek, Camila Fonseca,

de Maio Carrilho, Claudia M. D.,

Fernandes, Bianca H. Ventura,

Neto, Lauro V. Perdigão,

Noguera, Saidy Vasconez,

Duarte, Edson Luiz Tarsia,

Marchi, Ana Paula,

Costa, Silvia Figueiredo,

Guimarães, Thais,

Trindade, Priscila A.

2022

Overview

This study evaluates a possible correlation between multidrug-resistant Klebsiella pneumoniae strains and virulence markers in a Danio rerio (zebrafish) model. Whole-genome sequencing (WGS) was performed on 46 strains from three Brazilian hospitals. All of the isolates were colistin-resistant and harbored blaKPC-2. Ten different sequence types (STs) were found; 63% belonged to CC258, 22% to ST340, and 11% to ST16. The virulence factors most frequently found were type 3 fimbriae, siderophores, capsule regulators, and RND efflux-pumps. Six strains were selected for a time-kill experiment in zebrafish embryos: infection by ST16 was associated with a significantly higher mortality rate when compared to non-ST16 strains (52% vs. 29%, p = 0.002). Among the STs, the distribution of virulence factors did not differ significantly except for ST23, which harbored a greater variety of factors than other STs but was not related to a higher mortality rate in zebrafish. Although several virulence factors are described in K. pneumoniae, our study found ST16 to be the only significant predictor of a virulent phenotype in an animal model. Further research is needed to fully understand the correlation between virulence and sequence types.

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Publisher

MDPI AG,MDPI

Subject

/ Efflux