Genomic characterization of Achromobacter genogroup 20 and identification of a potential species-specific marker
Year: 2024
Type: article
Abstract: To describe the genome of Achromobacter genogroup 20 and explore the presence of resistance determinants. Isolate 413638 was identified through nrd A and MLST analysis. Antimicrobial susceptibility testing was performed according CLSI 2024. NGS was conducted using Illumina MiSeq, on the NextSeq500 platform with 150 bp paired-end reads, and de novo assembly was assessed using Unicycler (Galaxy). Coding sequences were predicted and confirmed with RAST and BLAST, and resistance determinants were evaluated using Resfinder and manual curation. All Achromobacter spp. genomes were obtained from NCBI, and the presence of bla OXA was investigated. Average nucleotide identity (ANI) and tetranucleotide analysis (TETRA) were calculated. Phylogenetic analysis of the new OXA variant was conducted against other species-specific markers in Achromobacter . Isolate 413638 was identified as Achromobacter genogroup 20 ST365, showing resistance to third- and fourth-generation cephalosporins, aminoglycosides, and fluoroquinolones. The genome included coding sequences for three putative β-lactamases (one new OXA type-class D β -lactamase and two new class C), 32 efflux pump proteins, two aminoglycoside-modifying enzymes and a dihydropteroate synthase; also, substitutions in par C and par E were detected. The OXA enzyme, designated OXA-1238 (PP446293), differs from OXA-114a by 85 amino acids, with 69% identity. In silico analysis found OXA-1238 variants in three additional Achromobacter spp. genomes, with 97% identity. Based on ANI and tetra analysis, the three genomes corresponded to Achromobacter genogroup 20. Several resistance markers were found, probably contributing to the resistance profile observed in Achromobacter genogroup 20 ST365. The new OXA variant identified, OXA-1238, could constitute a useful molecular marker for species identification.
Language: English
Subfield: Endocrinology
Domain: Life Sciences
Open Access status: gold
Estimated APC paid: $1,890
Funders: Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Agencia Nacional de Promoción de la Investigación, el Desarrollo Tecnológico y la Innovación, Agencia Nacional de Promoción Científica y Tecnológica, Secretaría de Ciencia y Técnica, Universidad de Buenos Aires
OpenAlex ID: W4404802118