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ARG-ANNOT, a New Bioinformatic Tool To Discover Antibiotic Resistance Genes in Bacterial Genomes

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TLDR
A concise database for BLAST using a Bio-Edit interface that can detect AR genetic determinants in bacterial genomes and can rapidly and easily discover putative new AR geneticeterminants is created.
Abstract
ARG-ANNOT (Antibiotic Resistance Gene-ANNOTation) is a new bioinformatic tool that was created to detect existing and putative new antibiotic resistance (AR) genes in bacterial genomes. ARG-ANNOT uses a local BLAST program in Bio-Edit software that allows the user to analyze sequences without a Web interface. All AR genetic determinants were collected from published works and online resources; nucleotide and protein sequences were retrieved from the NCBI GenBank database. After building a database that includes 1,689 antibiotic resistance genes, the software was tested in a blind manner using 100 random sequences selected from the database to verify that the sensitivity and specificity were at 100% even when partial sequences were queried. Notably, BLAST analysis results obtained using the rmtF gene sequence (a new aminoglycoside-modifying enzyme gene sequence that is not included in the database) as a query revealed that the tool was able to link this sequence to short sequences (17 to 40 bp) found in other genes of the rmt family with significant E values. Finally, the analysis of 178 Acinetobacter baumannii and 20 Staphylococcus aureus genomes allowed the detection of a significantly higher number of AR genes than the Resfinder gene analyzer and 11 point mutations in target genes known to be associated with AR. The average time for the analysis of a genome was 3.35 ± 0.13 min. We have created a concise database for BLAST using a Bio-Edit interface that can detect AR genetic determinants in bacterial genomes and can rapidly and easily discover putative new AR genetic determinants.

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Citations
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Genomic analysis of diversity, population structure, virulence, and antimicrobial resistance in Klebsiella pneumoniae, an urgent threat to public health

TL;DR: The DNA sequence of K. pneumoniae isolates from around the world is determined and it is shown that there is a wide spectrum of diversity, including variation within shared sequences and gain and loss of whole genes, and there is an unrecognized association between the possession of specific gene profiles associated with virulence and antibiotic resistance.
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SRST2: Rapid genomic surveillance for public health and hospital microbiology labs

TL;DR: This work presents SRST2, a read mapping-based tool for fast and accurate detection of genes, alleles and multi-locus sequence types (MLST) from WGS data, which is highly accurate and outperforms assembly-based methods in terms of both gene detection and allele assignment.
References
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Journal ArticleDOI

Comparative Genomic Analysis of Rapid Evolution of an Extreme-Drug-Resistant Acinetobacter baumannii Clone

TL;DR: Comparative genomics has been employed to analyze the rapid evolution of an EDR Acinetobacter baumannii clone from the intensive care unit (ICU) of Rigshospitalet at Copenhagen and revealed that a putative porin protein was down-regulated when A. baumANNii 53264 was exposed to antimicrobials, which may reduce the entry of antibiotics into the bacterial cell.
Journal ArticleDOI

Molecular mechanisms of resistance to antibiotics in Bartonella bacilliformis

TL;DR: It is believed that doxycycline in association with gentamicin may be the preferred regimen for the treatment of the acute and eruptive stages of Carrion's disease, but clinical trials are warranted to support the findings.
Journal ArticleDOI

Phenotypic and genotypic characterization of β-lactam resistance in Klebsiella pneumoniae isolated from swine.

TL;DR: The β-lactam resistance phenotypes and genotypes of K. pneumoniae isolates from swine in southwestern China are demonstrated, and four novel variants were identified among the 10 OKP β- lactamase-producing K. coronavirus isolates.
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Epidemiology of macrolide and/or lincosamide resistant Streptococcus pneumoniae clinical isolates with ribosomal mutations

TL;DR: Twenty macrolide and/or lincosamide resistant Streptococcus pneumoniae clinical isolates from various sources with 50S ribosomal mutations were identified and one isolate contained an altered L22 gene.
Journal ArticleDOI

A double mutation in the gyrA gene is necessary to produce high levels of resistance to moxifloxacin in Campylobacter spp. clinical isolates.

TL;DR: Moxifloxacin exhibited the greatest activity of the quinolones tested, being active against isolates carrying a single mutation in the gyrA gene.
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