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Sunday, July 7, 2019

Genomic comparison between Staphylococcus aureus GN strains clinically isolated from a familial infection case: IS1272 transposition through a novel inverted repeat-replacing mechanism.

A bacterial insertion sequence (IS) is a mobile DNA sequence carrying only the transposase gene (tnp) that acts as a mutator to disrupt genes, alter gene expressions, and cause genomic rearrangements. “Canonical” ISs have historically been characterized by their terminal inverted repeats (IRs), which may form a stem-loop structure, and duplications of a short (non-IR) target sequence at both ends, called target site duplications (TSDs). The IS distributions and virulence potentials of Staphylococcus aureus genomes in familial infection cases are unclear. Here, we determined the complete circular genome sequences of familial strains from a Panton-Valentine leukocidin (PVL)-positive ST50/agr4 S. aureus…

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Sunday, July 7, 2019

Complete genome sequence of multidrug-resistant Staphylococcus sciuri strain SNUDS-18 isolated from a farmed duck in South Korea.

This study aimed to determine the complete genome sequence of multidrug-resistant Staphylococcus sciuri strain SNUDS-18 isolated from a farmed duck in South Korea.Genomic DNA was sequenced using a PacBio RS II system. The obtained genome was annotated and antimicrobial resistance and virulence genes were identified.The sequenced genome possessed a mecA homologue (mecA1) that was almost identical to that of other oxacillin-susceptible S. sciuri strains, whereas the staphylococcal cassette chromosome mec (SCCmec) was not detected. Moreover, various antimicrobial resistance genes conferring resistance to ß-lactams, aminoglycosides, phenicols, tetracycline and macrolide-lincosamide-streptogramin B (MLSB) antimicrobials were identified.The SNUDS-18 genome and its associated genomic data…

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Sunday, July 7, 2019

Wide geographical dissemination of the multiresistant Staphylococcus capitis NRCS-A clone in neonatal intensive-care units.

Nosocomial late-onset sepsis represents a frequent cause of morbidity and mortality in preterm neonates. The Staphylococcus capitis clone NRCS-A has been previously described as an emerging cause of nosocomial bacteraemia in French neonatal intensive-care units (NICUs). In this study, we aimed to explore the possible unrecognized dissemination of this clone on a larger geographical scale. One hundred methicillin-resistant S. capitis strains isolated from neonates (n = 86) and adult patients (n = 14) between 2000 and 2013 in four different countries (France, Belgium, the UK, and Australia) were analysed with SmaI pulsed-field gel electrophoresis (PFGE) and dru typing. The vast majority of NICU strains showed…

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Sunday, July 7, 2019

Complete genome sequences of two methicillin-sensitive Staphylococcus aureus isolates representing a population subset highly prevalent in human colonization.

Here, we report the high-quality draft genome sequences of two methicillin-susceptible Staphylococcus aureus isolates, 08-02119 and 08-02300. Belonging to sequence type 582 (ST582) and ST7, both isolates are representatives of clonal lineages often associated with asymptomatic colonization of humans. Copyright © 2016 Weber et al.

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Sunday, July 7, 2019

Divergent isoprenoid biosynthesis pathways in Staphylococcus species constitute a drug target for treating infections in companion animals.

Staphylococcus species are a leading cause of skin and soft tissue infections in humans and animals, and the antibiotics used to treat these infections are often the same. Methicillin- and multidrug-resistant staphylococcal infections are becoming more common in human and veterinary medicine. From a “One Health” perspective, this overlap in antibiotic use and resistance raises concerns over the potential spread of antibiotic resistance genes. Whole-genome sequencing and comparative genomics analysis revealed that Staphylococcus species use divergent pathways to synthesize isoprenoids. Species frequently associated with skin and soft tissue infections in companion animals, including S. schleiferi and S. pseudintermedius, use the nonmevalonate pathway.…

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Sunday, July 7, 2019

Complete genome sequence of Staphylococcus carnosus LTH 3730.

Specific strains of the apathogenic coagulase-negative species Staphylococcus carnosus are frequently used as meat starter cultures, as they contribute to color formation and the production of aroma compounds. Here, we report the complete genome sequence of S. carnosus LTH 3730, a strain isolated from a fermented fish product. Copyright © 2016 Müller et al.

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Sunday, July 7, 2019

Emergence of ileS2-carrying, multidrug-resistant plasmids in Staphylococcus lugdunensis.

Of 137 Staphylococcus lugdunensis isolates collected from two nephrology centers in Hong Kong, 10 (7.3%) and 3 (2.2%) isolates had high-level and low-level mupirocin resistance, respectively. Isolates with high-level resistance contained the plasmid-mediated ileS2 gene, while isolates with low-level resistance contained the mutation V588F within the chromosomal ileS gene. All but one of the ileS2-positive isolates belong to the predominating clone HKU1. Plasmids carrying the ileS2 gene were mosaic and also cocarry multiple other resistance determinants. Copyright © 2016, American Society for Microbiology. All Rights Reserved.

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Sunday, July 7, 2019

Transfer of the methicillin resistance genomic island among staphylococci by conjugation.

Methicillin resistance creates a major obstacle for treatment of Staphylococcus aureus infections. The resistance gene, mecA, is carried on a large (20 kb to?>?60 kb) genomic island, staphylococcal cassette chromosome mec (SCCmec), that excises from and inserts site-specifically into the staphylococcal chromosome. However, although SCCmec has been designated a mobile genetic element, a mechanism for its transfer has not been defined. Here we demonstrate the capture and conjugative transfer of excised SCCmec. SCCmec was captured on pGO400, a mupirocin-resistant derivative of the pGO1/pSK41 staphylococcal conjugative plasmid lineage, and pGO400::SCCmec (pRM27) was transferred by filter-mating into both homologous and heterologous S.…

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Sunday, July 7, 2019

Complete genome sequence of Staphylococcus haemolyticus type strain SGAir0252.

Staphylococcus haemolyticus is a coagulase-negative staphylococcal species that is part of the skin microbiome and an opportunistic human pathogen. The strain SGAir0252 was isolated from tropical air samples collected in Singapore, and its complete genome comprises one chromosome of 2.63?Mb and one plasmid of 41.6?kb. Copyright © 2018 Premkrishnan et al.

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Sunday, July 7, 2019

Draft genome sequence of lytic bacteriophage SA7 infecting Staphylococcus aureus isolates

Staphylococcus aureus is a Gram-positive and a round-shaped bacterium of Firmicutes phylum, and is a common cause of skin infections, respiratory infections, and food poisoning. Bacteriophages infecting S. aureus can be an effective treatment for S. aureus infections. Here, the draft genomic sequence is announced for a lytic bacteriophage SA7 infecting S. aureus isolates. The bacteriophage SA7 was isolated from a sewage water sample near a livestock farm in Chungcheongnam-do, South Korea. SA7 has a genome of 34,730 bp and 34.1% G + C content. The genome has 53 protein-coding genes, 23 of which have predicted functions from BLASTp analysis,…

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Sunday, July 7, 2019

First description of novel arginine catabolic mobile elements (ACMEs) types IV and V harboring a kdp operon in Staphylococcus epidermidis characterized by whole genome sequencing.

The arginine catabolic mobile element (ACME) was first described in the methicillin-resistant Staphylococcus aureus strain USA300 and is thought to facilitate survival on skin. To date three distinct ACME types have been characterized comprehensively in S. aureus and/or Staphylococcus epidermidis. Type I harbors the arc and opp3 operons encoding an arginine deaminase pathway and an oligopeptide permease ABC transporter, respectively, type II harbors the arc operon only, and type III harbors the opp3 operon only. To investigate the diversity and detailed genetic organization of ACME, whole genome sequencing (WGS) was performed on 32 ACME-harboring oro-nasal S. epidermidis isolates using MiSeq-…

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