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Ocloo R, Newton-Foot M, Ziebuhr W, Whitelaw AC. Molecular epidemiology and antibiotic resistance of staphylococci other than Staphylococcus aureus in children in Cape Town, South Africa. Front Microbiol 2023; 14:1239666. [PMID: 37601359 PMCID: PMC10437061 DOI: 10.3389/fmicb.2023.1239666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 07/11/2023] [Indexed: 08/22/2023] Open
Abstract
Introduction Staphylococci other than Staphylococcus aureus (SOSA) have emerged as significant pathogens in healthcare settings, particularly among patients with indwelling devices and immunocompromised individuals. Staphylococcus epidermidis, Staphylococcus haemolyticus and Staphylococcus hominis are the most common commensal SOSA species and are implicated in infections such as endocarditis and bacteremia. SOSA infections in neonates and children have been reported globally. Recent increases in antibiotic resistance and virulence among SOSA strains in clinical settings have highlighted the need to describe the reservoirs of SOSA to enable monitoring of these emerging pathogens. Methods Stool samples were collected from 150 healthy children from Cape Town communities between 2017 and 2020. Staphylococci were isolated, identified using mass-spectrometry, and antimicrobial susceptibility testing and Illumina whole genome sequencing were performed. Results Among the participants, 50 (33.3%) were colonized by SOSA, with S. haemolyticus (n = 38; 25.3%) being the most common, followed by S. hominis (n = 5; 3.3%) and Mammalicoccus sciuri (n = 5; 3.3%). Out of the 77 initially isolated S. haemolyticus strains, 23 were identified as Staphylococcus borealis through whole genome sequencing. All S. haemolyticus isolates (n = 49) were methicillin resistant, with 65.3% (n = 32) harbouring mecA. In S. haemolyticus, SCCmec type VIII(4A) was detected in 42.0% of ST9 isolates while non-mecA methicillin resistant S. haemolyticus isolates were mostly ST49 (41.1%). Additionally, 16 (50.0%) S. haemolyticus strains contained non-typeable SCCmec elements. Discussion High rates of methicillin resistance were identified among colonizing SOSA in Cape Town, increasing the risk of transmission to clinical settings. This study also identified a new species, S. borealis, for the first time in Africa.
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Affiliation(s)
- Remous Ocloo
- Division of Medical Microbiology and Immunology, Department of Pathology, Stellenbosch University, Stellenbosch, South Africa
| | - Mae Newton-Foot
- Division of Medical Microbiology and Immunology, Department of Pathology, Stellenbosch University, Stellenbosch, South Africa
- National Health Laboratory Service, Tygerberg Hospital, Cape Town, South Africa
| | - Wilma Ziebuhr
- Institute of Molecular Infection Biology, University of Wuerzburg, Wuerzburg, Germany
| | - Andrew Christopher Whitelaw
- Division of Medical Microbiology and Immunology, Department of Pathology, Stellenbosch University, Stellenbosch, South Africa
- National Health Laboratory Service, Tygerberg Hospital, Cape Town, South Africa
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Comparative Genomic Analysis of a Multidrug-Resistant Staphylococcus hominis ShoR14 Clinical Isolate from Terengganu, Malaysia, Led to the Discovery of Novel Mobile Genetic Elements. Pathogens 2022; 11:pathogens11121406. [PMID: 36558739 PMCID: PMC9782665 DOI: 10.3390/pathogens11121406] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2022] [Revised: 11/20/2022] [Accepted: 11/21/2022] [Indexed: 11/24/2022] Open
Abstract
Staphylococcus hominis is a coagulase-negative Staphylococcus (CoNS) commensal capable of causing serious systemic infections in humans. The emergence of multidrug-resistant S. hominis strains is of concern but little is known about the characteristics of this organism, particularly from Malaysia. Here, we present the comparative genome analysis of S. hominis ShoR14, a multidrug-resistant, methicillin-resistant blood isolate from Terengganu, Malaysia. Genomic DNA of S. hominis ShoR14 was sequenced on the Illumina platform and assembled using Unicycler v0.4.8. ShoR14 belonged to sequence type (ST) 1 which is the most prevalent ST of the S. hominis subsp. hominis. Comparative genomic analysis with closely related strains in the database with complete genome sequences, led to the discovery of a novel variant of the staphylococcal chromosome cassette mec (SCCmec) type VIII element harboring the mecA methicillin-resistance gene in ShoR14 and its possible carriage of a SCCfus element that encodes the fusidic acid resistance gene (fusC). Up to seven possible ShoR14 plasmid contigs were identified, three of which harbored resistance genes for tetracycline (tetK), chloramphenicol (catA7), macrolides, lincosamides, and streptogramin B (ermC). Additionally, we report the discovery of a novel mercury-resistant transposon, Tn7456, other genomic islands, and prophages which make up the S. hominis mobilome.
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Gostev V, Leyn S, Kruglov A, Likholetova D, Kalinogorskaya O, Baykina M, Dmitrieva N, Grigorievskaya Z, Priputnevich T, Lyubasovskaya L, Gordeev A, Sidorenko S. Global Expansion of Linezolid-Resistant Coagulase-Negative Staphylococci. Front Microbiol 2021; 12:661798. [PMID: 34589061 PMCID: PMC8473885 DOI: 10.3389/fmicb.2021.661798] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 07/30/2021] [Indexed: 11/13/2022] Open
Abstract
Coagulase-negative staphylococci (CoNS) for a long time were considered avirulent constituents of the human and warm-blooded animal microbiota. However, at present, S. epidermidis, S. haemolyticus, and S. hominis are recognized as opportunistic pathogens. Although linezolid is not registered for the treatment of CoNS infections, it is widely used off-label, promoting emergence of resistance. Bioinformatic analysis based on maximum-likelihood phylogeny and Bayesian clustering of the CoNS genomes obtained in the current study and downloaded from public databases revealed the existence of international linezolid-resistant lineages, each of which probably had a common predecessor. Linezolid-resistant S. epidermidis sequence-type (ST) 2 from Russia, France, and Germany formed a compact group of closely related genomes with a median pairwise single nucleotide polymorphism (SNP) difference of fewer than 53 SNPs, and a common ancestor of this lineage appeared in 1998 (1986-2006) before introduction of linezolid in practice. Another compact group of linezolid-resistant S. epidermidis was represented by ST22 isolates from France and Russia with a median pairwise SNP difference of 40; a common ancestor of this lineage appeared in 2011 (2008-2013). Linezolid-resistant S. hominis ST2 from Russia, Germany, and Brazil also formed a group with a high-level genome identity with median 25.5 core-SNP differences; the appearance of the common progenitor dates to 2003 (1996-2012). Linezolid-resistant S. hominis isolates from Russia demonstrated associated resistance to teicoplanin. Analysis of a midpoint-rooted phylogenetic tree of the group confirmed the genetic proximity of Russian and German isolates; Brazilian isolates were phylogenetically distant. repUS5-like plasmids harboring cfr were detected in S. hominis and S. haemolyticus.
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Affiliation(s)
- Vladimir Gostev
- Department of Medical Microbiology and Molecular Epidemiology, Pediatric Research and Clinical Center for Infectious Diseases, Saint Petersburg, Russia.,Department of Medical Microbiology, North-Western State Medical University Named After I. I. Mechnikov, Saint Petersburg, Russia
| | - Semen Leyn
- Infectious and Inflammatory Disease Center, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA, United States
| | - Alexander Kruglov
- Laboratory of Clinical Microbiology, National Agency for Clinical Pharmacology and Pharmacy, Moscow, Russia
| | - Daria Likholetova
- Department of Medical Microbiology and Molecular Epidemiology, Pediatric Research and Clinical Center for Infectious Diseases, Saint Petersburg, Russia.,Saint Petersburg State University, Saint Petersburg, Russia
| | - Olga Kalinogorskaya
- Department of Medical Microbiology and Molecular Epidemiology, Pediatric Research and Clinical Center for Infectious Diseases, Saint Petersburg, Russia
| | - Marina Baykina
- Laboratory of Clinical Microbiology, National Agency for Clinical Pharmacology and Pharmacy, Moscow, Russia
| | - Natalia Dmitrieva
- Department of Microbiology, N. N. Blokhin Russian Cancer Research Center, Moscow, Russia
| | - Zlata Grigorievskaya
- Department of Microbiology, N. N. Blokhin Russian Cancer Research Center, Moscow, Russia
| | - Tatiana Priputnevich
- Department of Microbiology, Clinical Pharmacology and Epidemiology, National Medical Research Center for Obstetrics, Gynecology and Perinatology, Moscow, Russia
| | - Lyudmila Lyubasovskaya
- Department of Microbiology, Clinical Pharmacology and Epidemiology, National Medical Research Center for Obstetrics, Gynecology and Perinatology, Moscow, Russia
| | - Alexey Gordeev
- Department of Microbiology, Clinical Pharmacology and Epidemiology, National Medical Research Center for Obstetrics, Gynecology and Perinatology, Moscow, Russia
| | - Sergey Sidorenko
- Department of Medical Microbiology and Molecular Epidemiology, Pediatric Research and Clinical Center for Infectious Diseases, Saint Petersburg, Russia.,Department of Medical Microbiology, North-Western State Medical University Named After I. I. Mechnikov, Saint Petersburg, Russia
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Characterization of genetic diversity and population structure within Staphylococcus chromogenes by multilocus sequence typing. PLoS One 2021; 16:e0243688. [PMID: 33720932 PMCID: PMC7959370 DOI: 10.1371/journal.pone.0243688] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 02/23/2021] [Indexed: 11/23/2022] Open
Abstract
Staphylococcus chromogenes is a common skin commensal in cattle and has been identified as a frequent cause of bovine mastitis and intramammary infections. We have developed a seven locus Multilocus Sequence Typing (MLST) scheme for typing S. chromogenes. Sequence-based typing systems, such as MLST, have application in studies of genetic diversity, population structure, and epidemiology, including studies of strain variation as a factor in pathogenicity or host adaptation. The S. chromogenes scheme was tested on 120 isolates collected from three geographic locations, Vermont and Washington State in the United States and Belgium. A total of 46 sequence types (STs) were identified with most of the STs being location specific. The utility of the typing scheme is indicated by a discrimination power of 95.6% for all isolates and greater than 90% for isolates from each of the three locations. Phylogenetic analysis placed 39 of the 46 STs into single core group consistent with a common genetic lineage; the STs in this group differ by less than 0.5% at the nucleotide sequence level. Most of the diversification in this lineage group can be attributed to mutation; recombination plays a limited role. This lineage group includes two clusters of single nucleotide variants in starburst configurations indicative of recent clonal expansion; nearly 50% of the isolates sampled in this study are in these two clusters. The remaining seven STs were set apart from the core group by having alleles with highly variable sequences at one or more loci. Recombination had a higher impact than mutation in the diversification of these outlier STs. Alleles with hypervariable sequences were detected at five of the seven loci used in the MLST scheme; the average sequence distances between the hypervariable alleles and the common core alleles ranged from 12 to 34 nucleotides. The extent of these sequence differences suggests the hypervariable alleles may be remnants of an ancestral genotype.
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Wuytack A, De Visscher A, Piepers S, Haesebrouck F, De Vliegher S. Fecal non-aureus Staphylococci are a potential cause of bovine intramammary infection. Vet Res 2020; 51:32. [PMID: 32122405 PMCID: PMC7052973 DOI: 10.1186/s13567-020-00761-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2019] [Accepted: 02/18/2020] [Indexed: 11/10/2022] Open
Abstract
The presence of non-aureus staphylococci (NAS) in bovine rectal feces has recently been described. Similar to other mastitis causing pathogens, shedding of NAS in the environment could result in intramammary infection. The objective of this study was to investigate whether NAS strains present in feces can cause intramammary infection, likely via teat apex colonization. During a cross-sectional study in 5 dairy herds, samples were collected from the habitats quarter milk, teat apices, and rectal feces from 25%, 10%, and 25% of the lactating cows, respectively, with a cow serving as the source of one type of sample only. Samples from clinical mastitis cases were continuously collected during the 1-year study period as well. The 6 most prevalent NAS species, Staphylococcus (S.) chromogenes, S. cohnii, S. devriesei, S. equorum, S. haemolyticus, and S. hominis, were further subtyped by random amplification of polymorphic deoxyribonucleic acid polymerase chain reaction (RAPD-PCR), when the same NAS species was present in the same herd in the three habitats. For S. chromogenes, S. cohnii, S. devriesei, and S. haemolyticus, the same RAPD type was found in rectal feces, teat apices, and quarter milk, indicating that fecal NAS can infect the mammary gland. For S. hominis and S. equorum, we were unable to confirm the presence of the same RAPD types in the three habitats.
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Affiliation(s)
- Ameline Wuytack
- M-team and Mastitis and Milk Quality Research Unit, Department of Reproduction, Obstetrics, and Herd Health, Faculty of Veterinary Medicine, Ghent University, 9820, Merelbeke, Belgium
| | - Anneleen De Visscher
- Flanders Research Institute for Agriculture, Fisheries and Food (ILVO), Technology and Food Science, Agricultural Engineering, Burg. Van Gansberghelaan 115 Bus 1, 9820, Merelbeke, Belgium
| | - Sofie Piepers
- M-team and Mastitis and Milk Quality Research Unit, Department of Reproduction, Obstetrics, and Herd Health, Faculty of Veterinary Medicine, Ghent University, 9820, Merelbeke, Belgium
| | - Freddy Haesebrouck
- Department of Pathology, Bacteriology, and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, 9820, Merelbeke, Belgium
| | - Sarne De Vliegher
- M-team and Mastitis and Milk Quality Research Unit, Department of Reproduction, Obstetrics, and Herd Health, Faculty of Veterinary Medicine, Ghent University, 9820, Merelbeke, Belgium.
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Szemraj M, Grazul M, Balcerczak E, Szewczyk EM. Staphylococcal species less frequently isolated from human clinical specimens - are they a threat for hospital patients? BMC Infect Dis 2020; 20:128. [PMID: 32046678 PMCID: PMC7014773 DOI: 10.1186/s12879-020-4841-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Accepted: 01/31/2020] [Indexed: 11/23/2022] Open
Abstract
Background Coagulase-negative staphylococci belonging to S. haemolyticus, S. hominis subsp. hominis, S. simulans, and S. warneri are often described as etiological factors of infections. Staphylococci are a phylogenetically coherent group; nevertheless, there are differences among the species which may be important to clinicians. Methods We investigated selected virulence factors and antibiotic resistance that were phenotypically demonstrated, the presence and expression of genes encoding the virulence factors, and the type of the SCCmec cassette. Results The differences between the tested species were revealed. A great number of isolates produced a biofilm and many of them contained single icaADBC operon genes. Clear differences between species in the lipolytic activity spectrum could be related to their ability to cause various types of infections. Our studies also revealed the presence of genes encoding virulence factors homologous to S. aureus in the analysed species such as enterotoxin and pvl genes, which were also expressed in single isolates of S. simulans and S. warneri. S. haemolyticus and S. hominis subsp. hominis isolates were resistant to all clinically important antibiotics including ß-lactams. The identified SCCmec cassettes belonged to IV, V, VII, and IX type but most of the detected cassettes were non-typeable. Among the investigated species, S. hominis subsp. hominis isolates accumulated virulence genes typical for S. aureus in the most efficient way and were widely resistant to antibiotics. Conclusions Our results clearly indicated significant differences between the tested species, which might be a result of the horizontal gene transfer (HGT) and can lead to the formation and selection of multi-drug resistant strains as well as strains with new virulence features. Such strains can have a new clinical relevance.
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Affiliation(s)
- Magdalena Szemraj
- Department of Pharmaceutical Microbiology and Microbiological Diagnostic, Medical University of Lodz, Pomorska 137, 90-235, Łódź, Poland.
| | - Magdalena Grazul
- Department of Pharmaceutical Microbiology and Microbiological Diagnostic, Medical University of Lodz, Pomorska 137, 90-235, Łódź, Poland
| | - Ewa Balcerczak
- Department of Pharmaceutical Biochemistry and Molecular Diagnostic, Laboratory of Molecular Diagnostic and Pharmacogenomics, Medical University of Lodz, Łódź, Poland
| | - Eligia M Szewczyk
- Department of Pharmaceutical Microbiology and Microbiological Diagnostic, Medical University of Lodz, Pomorska 137, 90-235, Łódź, Poland
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Pereira EM, de Mattos CS, Dos Santos OC, Ferreira DC, de Oliveira TLR, Laport MS, de Oliveira Ferreira E, Dos Santos KRN. Staphylococcus hominis subspecies can be identified by SDS-PAGE or MALDI-TOF MS profiles. Sci Rep 2019; 9:11736. [PMID: 31409863 PMCID: PMC6692339 DOI: 10.1038/s41598-019-48248-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2018] [Accepted: 07/26/2019] [Indexed: 11/30/2022] Open
Abstract
Staphylococcus hominis is part of the normal human microbiome. Two subspecies, S. hominis hominis (Shh) and S. hominis novobiosepticus (Shn), have clinical significance. Forty-nine S. hominis isolates were analyzed by the MicroScan automated system, SDS-PAGE and MALDI-TOF methods, followed by partial sequencing of the 16S rDNA gene. The trehalose fermentation test, disk diffusion and broth microdilution tests were used to identify (novobiocin test) and access the susceptibility to oxacillin and vancomycin of isolates. The SCCmec elements and genomic diversity were evaluated by PCR and PFGE methods, respectively. Profiles of 28 (57%; 8 Shh and 20 Shn) isolates corroborated with the results found in all the applied methods of identification. The remaining 21 (43%) isolates were phenotypically identified as Shh by MicroScan; however, they were identified as Shn by SDS-PAGE and mass spectral, and confirmed by 16S rDNA sequencing. Among 41 isolates identified as Shn by the molecular and mass spectrometry methods, 19 (41%) were novobiocin-sensitive, and the trehalose test indicated 11 positive isolates, which are considered atypical phenotypic results for this subspecies. In addition, 92.7% of the isolates identified as Shn by these methods carried mecA gene, while only 12.5% of the Shh isolates were positive. Together, the results highlighted the SDS-PAGE and MALDI-TOF MS methods as promising tools for discriminating S. hominis subspecies.
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Affiliation(s)
- Eliezer Menezes Pereira
- Instituto Federal de Educação, Ciência e Tecnologia do Rio de Janeiro (Campus Pinheiral), Rio de Janeiro, Brazil.,Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Claudio Simões de Mattos
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Olinda Cabral Dos Santos
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Dennis Carvalho Ferreira
- Faculdade de Odontologia, Universidade Veiga de Almeida, Faculdade de Odontologia, Universidade Estácio de Sá, Rio de Janeiro, Brazil
| | - Tamara Lopes Rocha de Oliveira
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Marinella Silva Laport
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eliane de Oliveira Ferreira
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Katia Regina Netto Dos Santos
- Departamento de Microbiologia Médica, Instituto de Microbiologia Paulo de Góes, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil.
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Song M, Li Q, He Y, Lan L, Feng Z, Fan Y, Liu H, Qin F, Chen D, Yang M. A Comprehensive Multilocus Sequence Typing Scheme for Identification and Genotyping of Staphylococcus Strains. Foodborne Pathog Dis 2019; 16:331-338. [PMID: 30676080 DOI: 10.1089/fpd.2018.2565] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Increasing clinical significance of coagulase-negative staphylococci requires effective methods for species identification and genotyping. In this study, six housekeeping genes (femA, ftsZ, gap, pyrH, rpoB, and tuf) with extensive allelic polymorphisms were identified and evaluated to develop a comprehensive multilocus sequence typing (MLST) scheme. Selected primers were capable of amplification of the six loci from all of the 180 Staphylococcus strains belonging to 18 different species. Sequence analysis of each locus (44-63 alleles) revealed higher nucleotide diversity than 16S rRNA (28 alleles). Phylogenetic analysis of the concatenated sequences (3054 bp) of the six loci provided accurate species identification and highly discriminatory typing for all the strains. Multilocus allelic analysis of the 180 Staphylococcus strains generated 103 different sequence profiles, suggesting high genetic diversity of the strains. For example, 30 S. aureus, 37 S. epidermidis, 32 S. haemolyticus, and 14 S. hominis strains were typed into 15, 21, 11, and 10 sequence profiles, respectively. Compared with published MLST schemes that restrict on a few particular species, this new scheme both achieved similar discrimination for typing S. aureus, S. epidermidis, S. haemolyticus, and S. hominis and provided sufficient discriminatory power for typing additional opportunistic species, such as S. cohnii, S. capitis, and S. warneri. Importantly, the comprehensive MLST scheme for Staphylococcus strains provides a better genotyping tool for understanding the phylogeny of coagulase-positive Staphylococcus aureus strains.
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Affiliation(s)
- Minghui Song
- 1 Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Qiongqiong Li
- 1 Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Yiping He
- 2 Eastern Regional Research Center, Agricultural Research Service, United States Department of Agriculture, Wyndmoor, Pennsylvania
| | - Lefu Lan
- 3 Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Zhen Feng
- 1 Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Yiling Fan
- 1 Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Hao Liu
- 1 Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Feng Qin
- 1 Shanghai Institute for Food and Drug Control, Shanghai, China
| | - Dongying Chen
- 3 Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - Meicheng Yang
- 1 Shanghai Institute for Food and Drug Control, Shanghai, China
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Szczuka E, Krzymińska S, Bogucka N, Kaznowski A. Multifactorial mechanisms of the pathogenesis of methicillin-resistant Staphylococcus hominis isolated from bloodstream infections. Antonie van Leeuwenhoek 2017; 111:1259-1265. [PMID: 29264791 PMCID: PMC5999180 DOI: 10.1007/s10482-017-1007-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Accepted: 12/15/2017] [Indexed: 12/29/2022]
Abstract
Staphylococcus hominis is a species of the coagulase-negative staphylococci. It has been designated as a potential pathogen but so far the pathogenic mechanisms of this bacterium have not been determined. We studied 30 clinical isolates of methicillin-resistant S. hominis, which were previously examined for biofilm forming properties. The results of this study revealed that all these S. hominis strains had the ability to adhere to HeLa cells. Over 40% of the S. hominis strains invaded epithelial cells. The invasion index ranged from 0 to 41.5%. All isolates exhibited the cytotoxic activity of extracellular factors, which caused the destruction of epithelial cells. More than 90% of these methicillin-resistant strains contained at least one aminoglycosides resistance gene. The ant(4′)-I gene was found in 63% of the isolates, aac(6′)/aph(2″) in 20% and aph(3′)-IIIa in 47%. Two strains were assigned to SCCmec type VIII and three to SCCmec type III. The remaining isolates (83%) harboured a non-typeable SCCmec type. The mec complex A was predominant in this species. The results indicate that the pathogenicity of S. hominis may be multifactorial, involving adhesion, invasion and the activity of extracellular toxins, which cause damage to the host epithelium.
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Affiliation(s)
- Ewa Szczuka
- Department of Microbiology, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University in Poznań, ul. Umultowska 89, 61-614, Poznań, Poland.
| | - Sylwia Krzymińska
- Department of Microbiology, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University in Poznań, ul. Umultowska 89, 61-614, Poznań, Poland
| | - Natalia Bogucka
- Department of Microbiology, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University in Poznań, ul. Umultowska 89, 61-614, Poznań, Poland
| | - Adam Kaznowski
- Department of Microbiology, Faculty of Biology, Institute of Experimental Biology, Adam Mickiewicz University in Poznań, ul. Umultowska 89, 61-614, Poznań, Poland
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Leung NS, Vidoni ML, Robinson DA, Padgett P, Brown EL. A Community-Based Study of Staphylococcus aureus Nasal Colonization and Molecular Characterization Among Men Who Have Sex with Men. LGBT Health 2017; 4:345-351. [PMID: 29022859 DOI: 10.1089/lgbt.2017.0016] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
PURPOSE The aims of this cross-sectional study were to determine the prevalence of Staphylococcus aureus nasal colonization, evaluate community-related behavioral risk factors, and utilize staphylococcal protein A (spa) typing for epidemiological surveillance among community-based men who have sex with men from the National HIV Behavioral Surveillance System in Houston, Texas. METHODS Descriptive methods and logistic analyses were used to determine associations with nasal colonization. RESULTS The prevalence of S. aureus colonization was 29.7%; of these, 3.0% were colonized with methicillin-resistant S. aureus. Logistic analyses revealed that anal intercourse practices were associated with colonization (P < 0.05). A diverse population of 38 spa types was identified. CONCLUSION Our findings suggest that an association among preferential sex practices, condom use, and S. aureus colonization exists and should be investigated further.
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Affiliation(s)
- Nina S Leung
- 1 Department of Epidemiology, Human Genetics, and Environmental Sciences, Center for Infectious Diseases, University of Texas Health Science Center , Houston, Texas
| | - Michelle L Vidoni
- 1 Department of Epidemiology, Human Genetics, and Environmental Sciences, Center for Infectious Diseases, University of Texas Health Science Center , Houston, Texas
| | - D Ashley Robinson
- 2 Department of Microbiology and Immunology, University of Mississippi Medical Center , Jackson, Mississippi
| | - Paige Padgett
- 3 Department of Management, Policy & Community Health, University of Texas Health Science Center , Houston, Texas
| | - Eric L Brown
- 1 Department of Epidemiology, Human Genetics, and Environmental Sciences, Center for Infectious Diseases, University of Texas Health Science Center , Houston, Texas
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Mendoza-Olazarán S, Garcia-Mazcorro JF, Morfín-Otero R, Villarreal-Treviño L, Camacho-Ortiz A, Rodríguez-Noriega E, Bocanegra-Ibarias P, Maldonado-Garza HJ, Dowd SE, Garza-González E. Draft genome sequences of two opportunistic pathogenic strains of Staphylococcus cohnii isolated from human patients. Stand Genomic Sci 2017; 12:49. [PMID: 28878860 PMCID: PMC5580220 DOI: 10.1186/s40793-017-0263-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 08/22/2017] [Indexed: 12/16/2022] Open
Abstract
Herein, we report the draft-genome sequences and annotation of two opportunistic pathogenic strains of Staphylococcus cohnii isolated from humans. One strain (SC-57) was isolated from blood from a male patient in May 2006 and the other (SC-532) from a catheter from a male patient in June 2006. Similar to other genomes of Staphylococcus species, most genes (42%) of both strains are involved in metabolism of amino acids and derivatives, carbohydrates and proteins. Eighty (4%) genes are involved in virulence, disease, and defense and both species show phenotypic low biofilm production and evidence of increased antibiotic resistance associated to biofilm production. From both isolates, a new Staphylococcal Cassette Chromosome mec was detected: mec class A, ccr type 1. This is the first report of whole genome sequences of opportunistic S. cohnii isolated from human patients.
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Affiliation(s)
- Soraya Mendoza-Olazarán
- Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León Mexico
| | - José F Garcia-Mazcorro
- Facultad de Medicina Veterinaria, Universidad Autónoma de Nuevo León, General Escobedo, Nuevo León Mexico
| | - Rayo Morfín-Otero
- Hospital Civil de Guadalajara, Fray Antonio Alcalde, and Instituto de Patología Infecciosa y Experimental, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco Mexico
| | - Licet Villarreal-Treviño
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León Mexico
| | - Adrián Camacho-Ortiz
- Servicio de Infectología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León Mexico
| | - Eduardo Rodríguez-Noriega
- Hospital Civil de Guadalajara, Fray Antonio Alcalde, and Instituto de Patología Infecciosa y Experimental, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco Mexico
| | - Paola Bocanegra-Ibarias
- Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León Mexico
| | - Héctor J Maldonado-Garza
- Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León Mexico
| | - Scot E Dowd
- Molecular Research DNA Laboratory, Shallowater, TX USA
| | - Elvira Garza-González
- Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León Mexico
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Bückle Née Müller A, Kranz M, Schmidt H, Weiss A. Genetic diversity and population structure of food-borne Staphylococcus carnosus strains. Syst Appl Microbiol 2016; 40:34-41. [PMID: 27931747 DOI: 10.1016/j.syapm.2016.11.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 11/21/2016] [Accepted: 11/23/2016] [Indexed: 11/18/2022]
Abstract
The species Staphylococcus carnosus is a non-pathogenic representative of the coagulase negative staphylococci. Specific strains are applied as meat starter cultures. The species consists of two subspecies, S. carnosus ssp. carnosus and S. carnosus ssp. utilis. In order to place S. carnosus strains, characterized in former studies, in a genetic background that allows a typing of candidates for starter cultures, a Multilocus Sequence Typing (MLST) scheme was developed. Internal fragments of the genes tpiA, xprT, dat, gmk, glpK, narG, cstA, encoding triosephosphate isomerase, xanthine phosphoribosyltransferase, d-amino acid aminotransferase, guanylate kinase, glycerol kinase, the α-chain of the respiratory nitrate reductase, and a carbon starvation protein where chosen. Genes were selected based on their equal distribution in the genome, taxonomic value in subspecies differentiation and metabolic function. This MLST was applied to 44 S. carnosus strains, most of them previously analyzed for their suitability as starter cultures. The number of alleles varied between zero (tpiA) and five (cstA) and allowed the definition of nine sequence types (ST). ST1 was most abundant (18 strains), followed by ST2 (8) and ST4 (6). The nine STs confirmed a close relationship of all strains despite their isolation source and year, but lacked correlation with physiological activities relevant for starter cultures. The low amount of STs in the strain set lets us suggest that recombination between strains is rare. Thus, it is hypothesized that evolutionary events seem to be due to single point mutations rather than intrachromosomal recombination, and that the species possesses a clonal population structure.
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Affiliation(s)
- Anne Bückle Née Müller
- Department of Food Microbiology and Hygiene, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 28, 70599 Stuttgart, Germany.
| | - Markus Kranz
- Department of Food Microbiology and Hygiene, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 28, 70599 Stuttgart, Germany.
| | - Herbert Schmidt
- Department of Food Microbiology and Hygiene, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 28, 70599 Stuttgart, Germany.
| | - Agnes Weiss
- Department of Food Microbiology and Hygiene, Institute of Food Science and Biotechnology, University of Hohenheim, Garbenstrasse 28, 70599 Stuttgart, Germany.
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Mendoza-Olazarán S, Morfín-Otero R, Villarreal-Treviño L, Rodríguez-Noriega E, Llaca-Díaz J, Camacho-Ortiz A, González GM, Casillas-Vega N, Garza-González E. Antibiotic Susceptibility of Biofilm Cells and Molecular Characterisation of Staphylococcus hominis Isolates from Blood. PLoS One 2015; 10:e0144684. [PMID: 26659110 PMCID: PMC4685997 DOI: 10.1371/journal.pone.0144684] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 11/23/2015] [Indexed: 11/19/2022] Open
Abstract
Objectives We aimed to characterise the staphylococcal cassette chromosome mec (SCCmec) type, genetic relatedness, biofilm formation and composition, icaADBC genes detection, icaD expression, and antibiotic susceptibility of planktonic and biofilm cells of Staphylococcus hominis isolates from blood. Methods The study included 67 S. hominis blood isolates. Methicillin resistance was evaluated with the cefoxitin disk test. mecA gene and SCCmec were detected by multiplex PCR. Genetic relatedness was determined by pulsed-field gel electrophoresis. Biofilm formation and composition were evaluated by staining with crystal violet and by detachment assay, respectively; and the biofilm index (BI) was determined. Detection and expression of icaADBC genes were performed by multiplex PCR and real-time PCR, respectively. Antibiotic susceptibilities of planktonic cells (minimum inhibitory concentration, MIC) and biofilm cells (minimum biofilm eradication concentration, MBEC) were determined by the broth dilution method. Results Eighty-five percent (57/67) of isolates were methicillin resistant and mecA positive. Of the mecA-positive isolates, 66.7% (38/57) carried a new putative SCCmec type. Four clones were detected, with two to five isolates each. Among all isolates, 91% (61/67) were categorised as strong biofilm producers. Biofilm biomass composition was heterogeneous (polysaccharides, proteins and DNA). All isolates presented the icaD gene, and 6.66% (1/15) isolates expressed icaD. This isolate presented the five genes of ica operon. Higher BI and MBEC values than the MIC values were observed for amikacin, vancomycin, linezolid, oxacillin, ciprofloxacin, and chloramphenicol. Conclusions S. hominis isolates were highly resistant to methicillin and other antimicrobials. Most of the detected SCCmec types were different than those described for S. aureus. Isolates indicated low clonality. The results indicate that S. hominis is a strong biofilm producer with an extracellular matrix with similar composition of proteins, DNA and N-acetylglucosamine; and presents high frequency and low expression of icaD gene. Biofilm production is associated with increased antibiotic resistance.
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Affiliation(s)
- Soraya Mendoza-Olazarán
- Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - Rayo Morfín-Otero
- Hospital Civil de Guadalajara, Fray Antonio Alcalde, and Instituto de Patología Infecciosa y Experimental, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, México
| | - Licet Villarreal-Treviño
- Departamento de Microbiología e Inmunología, Facultad de Ciencias Biológicas, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - Eduardo Rodríguez-Noriega
- Hospital Civil de Guadalajara, Fray Antonio Alcalde, and Instituto de Patología Infecciosa y Experimental, Centro Universitario de Ciencias de la Salud, Universidad de Guadalajara, Guadalajara, Jalisco, México
| | - Jorge Llaca-Díaz
- Departamento de Patología Clínica, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - Adrián Camacho-Ortiz
- Servicio de Infectología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - Gloria M. González
- Departamento de Microbiología, Facultad de Medicina, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - Néstor Casillas-Vega
- Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
| | - Elvira Garza-González
- Servicio de Gastroenterología, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
- Departamento de Patología Clínica, Hospital Universitario Dr. José Eleuterio González, Universidad Autónoma de Nuevo León, Monterrey, Nuevo León, México
- * E-mail:
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14
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Hung WC, Chen HJ, Lin YT, Tsai JC, Chen CW, Lu HH, Tseng SP, Jheng YY, Leong KH, Teng LJ. Skin Commensal Staphylococci May Act as Reservoir for Fusidic Acid Resistance Genes. PLoS One 2015; 10:e0143106. [PMID: 26581090 PMCID: PMC4651549 DOI: 10.1371/journal.pone.0143106] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 10/30/2015] [Indexed: 11/18/2022] Open
Abstract
We analyzed the occurrence and mechanisms of fusidic acid resistance present in staphylococci isolated from 59 healthy volunteers. The fingers of the volunteers were screened for the presence of staphylococci, and the collected isolates were tested for resistance to fusidic acid. A total of 34 fusidic acid resistant staphylococcal strains (all were coagulase-negative) were isolated from 22 individuals (22/59, 37.3%). Examination of the resistance genes revealed that acquired fusB or fusC was present in Staphylococcus epidermidis, Staphylococcus capitis subsp. urealyticus, Staphylococcus hominis subsp. hominis, Staphylococcus warneri and Staphylococcus haemolyticus. Resistance islands (RIs) carrying fusB were found in S. epidermidis and S. capitis subsp. urealyticus, while staphylococcal chromosome cassette (SCC)-related structures harboring fusC were found in S. hominis subsp. hominis. Genotypic analysis of S. epidermidis and S. hominis subsp. hominis indicated that the fus elements were disseminated in diverse genetic strain backgrounds. The fusC elements in S. hominis subsp. hominis strains were highly homologous to SCCfusC in the epidemic sequence type (ST) 239/SCCmecIII methicillin-resistant S. aureus (MRSA) or the pseudo SCCmec in ST779 MRSA. The presence of acquired fusidic acid resistance genes and their genetic environment in commensal staphylococci suggested that the skin commensal staphylococci may act as reservoir for fusidic acid resistance genes.
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Affiliation(s)
- Wei-Chun Hung
- Department of Microbiology and Immunology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Hsiao-Jan Chen
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yu-Tzu Lin
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Jui-Chang Tsai
- Center for Optoelectronic Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
- Division of Neurosurgery, Department of Surgery, National Taiwan University Hospital, Taipei, Taiwan
| | | | | | - Sung-Pin Tseng
- Department of Medical Laboratory Science and Biotechnology, Kaohsiung Medical University, Kaohsiung, Taiwan
| | - Yao-Yu Jheng
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Kin Hong Leong
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Lee-Jene Teng
- Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University College of Medicine, Taipei, Taiwan
- Department of Laboratory Medicine, National Taiwan University Hospital, Taipei, Taiwan
- * E-mail:
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15
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Czekaj T, Ciszewski M, Szewczyk EM. Staphylococcus haemolyticus - an emerging threat in the twilight of the antibiotics age. MICROBIOLOGY-SGM 2015; 161:2061-8. [PMID: 26363644 DOI: 10.1099/mic.0.000178] [Citation(s) in RCA: 91] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Staphylococcus haemolyticus is one of the most frequent aetiological factors of staphylococcal infections. This species seems to lack the important virulence attributes described in other staphylococci. However, studies have shown that the presence of various enzymes, cytolysins and surface substances affects the virulence of S. haemolyticus. Nevertheless, none of them has been identified as crucial and determinative. Despite this, S. haemolyticus is, after Staphylococcus epidermidis, the second most frequently isolated coagulase-negative staphylococcus from clinical cases, notably from blood infections, including sepsis. This raises the question of what is the reason for the increasing clinical significance of S. haemolyticus? The most important factor might be the ability to acquire multiresistance against available antimicrobial agents, even glycopeptides. The unusual genome plasticity of S. haemolyticus strains manifested by a large number of insertion sequences and identified SNPs might contribute to its acquisition of antibiotic resistance. Interspecies transfer of SCCmec cassettes suggests that S. haemolyticus might also be the reservoir of resistance genes for other staphylococci, including Staphylococcus aureus. Taking into consideration the great adaptability and the ability to survive in the hospital environment, especially on medical devices, S. haemolyticus becomes a crucial factor in nosocomial infections caused by multiresistant staphylococci.
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Affiliation(s)
- Tomasz Czekaj
- Department of Pharmaceutical Microbiology and Microbiological Diagnostics, Medical University of Łódź, Pomorska 137, 90-235 Łódź, Poland
| | - Marcin Ciszewski
- Department of Pharmaceutical Microbiology and Microbiological Diagnostics, Medical University of Łódź, Pomorska 137, 90-235 Łódź, Poland
| | - Eligia M Szewczyk
- Department of Pharmaceutical Microbiology and Microbiological Diagnostics, Medical University of Łódź, Pomorska 137, 90-235 Łódź, Poland
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Szczuka E, Makowska N, Bosacka K, Słotwińska A, Kaznowski A. Molecular basis of resistance to macrolides, lincosamides and streptogramins in Staphylococcus hominis strains isolated from clinical specimens. Folia Microbiol (Praha) 2015; 61:143-7. [PMID: 26253583 PMCID: PMC4752575 DOI: 10.1007/s12223-015-0419-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 07/28/2015] [Indexed: 11/12/2022]
Abstract
Coagulase-negative staphylococci (CoNS) are the most frequently isolated bacteria from the blood and the predominant cause of nosocomial infections. Macrolides, lincosamides and streptogramin B (MLSB) antibiotics, especially erythromycin and clindamycin, are important therapeutic agents in the treatment of methicillin-resistant staphylococci infections. Among CoNS, Staphylococcus hominis represents the third most common organism. In spite of its clinical significance, very little is known about its mechanisms of resistance to antibiotics, especially MLSB. Fifty-five S. hominis isolates from the blood and the surgical wounds of hospitalized patients were studied. The erm(C) gene was predominant in erythromycin-resistant S. hominis isolates. The methylase genes, erm(A) and erm(B), were present in 15 and 25 % of clinical isolates, respectively. A combination of various erythromycin resistance methylase (erm) genes was detected in 15 % S. hominis isolates. The efflux gene msr(A) was detected in 18 % of isolates, alone in four isolates, and in different combinations in a further six. The lnu(A) gene, responsible for enzymatic inactivation of lincosamides was carried by 31 % of the isolates. No erythromycin resistance that could not be attributed to the genes erm(A), erm(B), erm(C) and msr(A) was detected. In S. hominis, 75 and 84 %, respectively, were erythromycin resistant and clindamycin susceptible. Among erythromycin-resistant S. hominis isolates, 68 % of these strains showed the inducible MLSB phenotype. Four isolates harbouring the msr(A) genes alone displayed the MSB phenotype. These studies indicated that resistance to MLSB in S. hominis is mostly based on the ribosomal target modification mechanism mediated by erm genes, mainly the erm(C), and enzymatic drug inactivation mediated by lnu(A).
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Affiliation(s)
- Ewa Szczuka
- Department of Microbiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, ul. Umultowska 89, 61-614, Poznań, Poland.
| | - Nicoletta Makowska
- Department of Microbiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, ul. Umultowska 89, 61-614, Poznań, Poland
| | - Karolina Bosacka
- Department of Microbiological and Laboratory Diagnostics, Bacteriological Laboratory, Regional Hospital in Poznań, Juraszów 7/19, 60-479, Poznań, Poland
| | - Anna Słotwińska
- Bacteriological Laboratory, Regional Hospital in Kołobrzeg, E. Łopuskiego 33, 78-100, Kołobrzeg, Poland
| | - Adam Kaznowski
- Department of Microbiology, Institute of Experimental Biology, Faculty of Biology, Adam Mickiewicz University, ul. Umultowska 89, 61-614, Poznań, Poland
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Suzuki Y, Omoe K, Hu DL, Sato'o Y, Ono HK, Monma C, Arai T, Konishi N, Kato R, Hirai A, Nakama A, Kai A, Kamata Y. Molecular epidemiological characterization ofStaphylococcus aureusisolates originating from food poisoning outbreaks that occurred in Tokyo, Japan. Microbiol Immunol 2014; 58:570-80. [DOI: 10.1111/1348-0421.12188] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2014] [Revised: 06/06/2014] [Accepted: 07/24/2014] [Indexed: 12/01/2022]
Affiliation(s)
- Yasunori Suzuki
- Department of Veterinary Medicine; Faculty of Agriculture; Iwate University; 3-18-8 Ueda Morioka City Iwate 020-8550
- United Graduate School of Veterinary Sciences; Gifu University; 1-1 Yanagido Gifu City Gifu 501-1193
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Katsuhiko Omoe
- Department of Veterinary Medicine; Faculty of Agriculture; Iwate University; 3-18-8 Ueda Morioka City Iwate 020-8550
- United Graduate School of Veterinary Sciences; Gifu University; 1-1 Yanagido Gifu City Gifu 501-1193
| | - Dong-Liang Hu
- School of Veterinary Medicine; Kitasato University; 23-35-1 Higashi Towada City Aomori 034-8628
| | - Yusuke Sato'o
- Department of Veterinary Medicine; Faculty of Agriculture; Iwate University; 3-18-8 Ueda Morioka City Iwate 020-8550
- United Graduate School of Veterinary Sciences; Gifu University; 1-1 Yanagido Gifu City Gifu 501-1193
- Department of Bacteriology; Hiroshima University Graduate School of Biomedical and Health Sciences; 1-2-3 Kasumi, Minami-ku Hiroshima City Hiroshima 734-8551
| | - Hisaya K. Ono
- Department of Microbiology and Immunology; Hirosaki University Graduate School of Medicine; 5 Zaifu-cho Hirosaki-city Aomori 036-8562 Japan
| | - Chie Monma
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Teruyoshi Arai
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Noriko Konishi
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Rei Kato
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Akihiko Hirai
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Akiko Nakama
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Akemi Kai
- Department of Microbiology; Tokyo Metropolitan Institute of Public Health; 3-24-1 Hyakunin-cho Shinjuku-ku Tokyo 169-0073
| | - Yoichi Kamata
- Department of Veterinary Medicine; Faculty of Agriculture; Iwate University; 3-18-8 Ueda Morioka City Iwate 020-8550
- United Graduate School of Veterinary Sciences; Gifu University; 1-1 Yanagido Gifu City Gifu 501-1193
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18
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Cavanagh JP, Hjerde E, Holden MTG, Kahlke T, Klingenberg C, Flægstad T, Parkhill J, Bentley SD, Sollid JUE. Whole-genome sequencing reveals clonal expansion of multiresistant Staphylococcus haemolyticus in European hospitals. J Antimicrob Chemother 2014; 69:2920-7. [PMID: 25038069 PMCID: PMC4195474 DOI: 10.1093/jac/dku271] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objectives Staphylococcus haemolyticus is an emerging cause of nosocomial infections, primarily affecting immunocompromised patients. A comparative genomic analysis was performed on clinical S. haemolyticus isolates to investigate their genetic relationship and explore the coding sequences with respect to antimicrobial resistance determinants and putative hospital adaptation. Methods Whole-genome sequencing was performed on 134 isolates of S. haemolyticus from geographically diverse origins (Belgium, 2; Germany, 10; Japan, 13; Norway, 54; Spain, 2; Switzerland, 43; UK, 9; USA, 1). Each genome was individually assembled. Protein coding sequences (CDSs) were predicted and homologous genes were categorized into three types: Type I, core genes, homologues present in all strains; Type II, unique core genes, homologues shared by only a subgroup of strains; and Type III, unique genes, strain-specific CDSs. The phylogenetic relationship between the isolates was built from variable sites in the form of single nucleotide polymorphisms (SNPs) in the core genome and used to construct a maximum likelihood phylogeny. Results SNPs in the genome core regions divided the isolates into one major group of 126 isolates and one minor group of isolates with highly diverse genomes. The major group was further subdivided into seven clades (A–G), of which four (A–D) encompassed isolates only from Europe. Antimicrobial multiresistance was observed in 77.7% of the collection. High levels of homologous recombination were detected in genes involved in adherence, staphylococcal host adaptation and bacterial cell communication. Conclusions The presence of several successful and highly resistant clones underlines the adaptive potential of this opportunistic pathogen.
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Affiliation(s)
- Jorunn Pauline Cavanagh
- Department of Paediatrics, University Hospital of North Norway, Tromsø, Norway Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Erik Hjerde
- Department of Chemistry, Norstruct, UiT The Arctic University of Norway, Tromsø, Norway
| | | | - Tim Kahlke
- Department of Chemistry, Norstruct, UiT The Arctic University of Norway, Tromsø, Norway
| | - Claus Klingenberg
- Department of Paediatrics, University Hospital of North Norway, Tromsø, Norway Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | - Trond Flægstad
- Department of Paediatrics, University Hospital of North Norway, Tromsø, Norway Department of Clinical Medicine, UiT The Arctic University of Norway, Tromsø, Norway
| | | | - Stephen D Bentley
- The Wellcome Trust Sanger Institute, Hinxton, Cambridge, UK Department of Medicine, University of Cambridge, Addenbrookes Hospital, Hills Road, Cambridge CB2 0SP, UK
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Biofilm formation by Staphylococcus hominis strains isolated from human clinical specimens. Folia Microbiol (Praha) 2014; 60:1-5. [DOI: 10.1007/s12223-014-0332-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 06/24/2014] [Indexed: 10/25/2022]
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20
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Multiplex PCR assay for identification of six different Staphylococcus spp. and simultaneous detection of methicillin and mupirocin resistance. J Clin Microbiol 2014; 52:2698-701. [PMID: 24829244 DOI: 10.1128/jcm.00918-14] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
We describe a new, efficient, sensitive, and fast single-tube multiple-PCR protocol for the identification of the most clinically significant Staphylococcus spp. and the simultaneous detection of the methicillin and mupirocin resistance loci. The protocol identifies at the species level isolates belonging to S. aureus, S. epidermidis, S. haemolyticus, S. hominis, S. lugdunensis, and S. saprophyticus.
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