Characterization of a SPM-1 Metallo-beta-lactamase-producing Pseudomonas Aeruginosa by Comparative Genomics and Phenotypic Analysis

Overview

Journal Sci Rep

Specialty Science

Date 2020 Aug 9

PMID 32764694

Citations 7

Authors

Ana Paula Barbosa do Nascimento

Fernando Medeiros Filho

Heidi Pauer

Luis Caetano Martha Antunes

Herio Sousa

Hermes Senger

Rodolpho Mattos Albano

Marcelo Trindade Dos Santos

Ana Paula DAlincourt Carvalho-Assef

Fabricio Alves Barbosa da Silva

Affiliations

Soon will be listed here.

Abstract

Pseudomonas aeruginosa is one of the most common pathogens related to healthcare-associated infections. The Brazilian isolate, named CCBH4851, is a multidrug-resistant clone belonging to the sequence type 277. The antimicrobial resistance mechanisms of the CCBH4851 strain are associated with the presence of the bla[Formula: see text] gene, encoding a metallo-beta-lactamase, in combination with other exogenously acquired genes. Whole-genome sequencing studies focusing on emerging pathogens are essential to identify key features of their physiology that may lead to the identification of new targets for therapy. Using both Illumina and PacBio sequencing data, we obtained a single contig representing the CCBH4851 genome with annotated features that were consistent with data reported for the species. However, comparative analysis with other Pseudomonas aeruginosa strains revealed genomic differences regarding virulence factors and regulatory proteins. In addition, we performed phenotypic assays that revealed CCBH4851 is impaired in bacterial motilities and biofilm formation. On the other hand, CCBH4851 genome contained acquired genomic islands that carry transcriptional factors, virulence and antimicrobial resistance-related genes. Presence of single nucleotide polymorphisms in the core genome, mainly those located in resistance-associated genes, suggests that these mutations may also influence the multidrug-resistant behavior of CCBH4851. Overall, characterization of Pseudomonas aeruginosa CCBH4851 complete genome revealed the presence of features that strongly relates to the virulence and antibiotic resistance profile of this important infectious agent.

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