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https://www.readbyqxmd.com/read/29336909/-non-reported-spa-types-in-our-country-in-staphylococcus-aureus-from-adult-patients-of-a-school-hospital-santa-fe-argentina
#1
Carla Tomatis, María R Baroni, María A Mendosa, Alicia Nagel, Analia Mollerach, Claudia Alvarez, Maria Laura Zurbriggen, Sabrina Cristobal, Glenda Segovia, Emilce de Los A Méndez
Staphylococcus aureus is a pathogen associated a different kind of infection. Molecular markers are useful tools to study microbial epidemiology. Twenty two methicillin-resistant S. aureus (MRSA) and 23 methicillin-susceptible S. aureus (MSSA) were studied by mecA gene, SCCmec cassette, Panton Valentine leucocidin (PVL) and spa polymorphism. The clinical data patients were analyzed. MSSA was prevalent in samples different from skin and soft tissue (SST) and in hospitalized patients, whereas MRSA in SST. SCCmec type IV was predominant, followed by type I...
January 11, 2018: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/29320451/the-pathogenesis-of-staphylococcus-aureus-eye-infections
#2
REVIEW
Richard J O'Callaghan
Staphylococcus aureus is a major pathogen of the eye able to infect the tear duct, eyelid, conjunctiva, cornea, anterior and posterior chambers, and the vitreous chamber. Of these infections, those involving the cornea (keratitis) or the inner chambers of the eye (endophthalmitis) are the most threatening because of their potential to cause a loss in visual acuity or even blindness. Each of these ocular sites is protected by the constitutive expression of a variety of antimicrobial factors and these defenses are augmented by a protective host response to the organism...
January 10, 2018: Pathogens
https://www.readbyqxmd.com/read/29319509/prevalence-influencing-factors-antibiotic-resistance-toxin-and-molecular-characteristics-of-staphylococcus-aureus-and-mrsa-nasal-carriage-among-diabetic-population-in-the-united-states-2001-2004
#3
Jialing Lin, Yang Peng, Chan Bai, Ting Zhang, Haoqu Zheng, Xiaojie Wang, Jiaping Ye, Xiaohua Ye, Ying Li, Zhenjiang Yao
Diabetic population were reported more likely to suffer carriage and infection with Staphylococcus aureus (S. aureus) and methicillin-resistant Staphylococcus aureus (MRSA) than non-diabetic population. We aim to elucidate the prevalence and characteristics of S. aureus and MRSA nasal carriage among diabetic population in the United States National Health and Nutrition Examination Survey, 2001-2004. Univariate analyses were conducted using Chi-square test, Fisher's exact probability test or student t test, as appropriate...
December 4, 2017: Polish Journal of Microbiology
https://www.readbyqxmd.com/read/29317899/outbreak-of-clonal-complex-22-panton-valentine-leucocidin-positive-methicillin-resistant-staphylococcus-aureus
#4
Mark I Garvey, Craig W Bradley, Kerry L Holden, Beryl Oppenheim
Aims: We describe the investigation and control of a nosocomial outbreak of Sequence Type (ST) 22 MRSA containing the Panton-Valentine leucocidin (PVL) toxin in an acute multispecialty surgical ward at University Hospital Birmingham NHS Foundation Trust. Methods: A patient was classed as acquiring methicillin-resistant Staphylococcus aureus (MRSA) if they had a negative admission screen and then had MRSA isolated from a subsequent screen or clinical specimen. Spa typing and pulsed field gel electrophoresis (PFGE) was undertaken to confirm MRSA acquisitions...
September 2017: Journal of Infection Prevention
https://www.readbyqxmd.com/read/29308781/community-acquired-necrotising-pneumonia-caused-by-panton-valentine-leucocidin-producing-methicillin-resistant-staphylococcus-aureus
#5
C L Leong, A Norazah, A Azureen, R Lingam
A 61-year-old male presented with community-onset pneumonia not responding to treatment despite given appropriate antibiotics. Computed tomography scan of the thorax showed large multiloculated pleural effusion with multiple cavitating foci within collapsed segments; lesions which were suggestive of necrotising pneumonia. Drainage of the effusion and culture revealed methicillin-resistant Staphylococcus aureus, which had the same antibiotic profile with the blood isolate and PVL gene positive.
December 2017: Medical Journal of Malaysia
https://www.readbyqxmd.com/read/29289018/spatial-analysis-of-polybrominated-diphenylethers-pbdes-and-polybrominated-biphenyls-pbbs-in-fish-collected-from-uk-and-proximate-marine-waters
#6
Li Zhihua, S Panton, Lisa Marshall, A Fernandes, M Rose, F Smith, Mel Holmes
Some commonly consumed marine fish species are considered to display a higher risk of bio-accumulating organic environmental contaminants such as PBDEs. As part of a study to investigate the spatial distribution of these contaminants, data on polybrominated diphenlyethers (PBDEs) and polybrominated biphenyls (PBBs) were collected and analysed by introducing a web-based resource which enables efficient spatial, species and concentration level representations. Furthermore, hierarchical cluster analyses permits correlations within the data to be predicted...
December 27, 2017: Chemosphere
https://www.readbyqxmd.com/read/29261764/pyoderma-outbreak-among-kindergarten-families-association-with-a-panton-valentine-leukocidin-pvl-producing-s-aureus-strain
#7
Rasmus Leistner, Axel Kola, Petra Gastmeier, Renate Krüger, Pia-Alice Hoppe, Sylke Schneider-Burrus, Irina Zuschneid, Nicoletta Wischnewski, Jennifer Bender, Franziska Layer, Michaela Niebank, Carmen Scheibenbogen, Leif G Hanitsch
OBJECTIVES: We report on an outbreak of skin and soft tissue infections (SSTI) among kindergarten families. We analyzed the transmission route and aimed to control the outbreak. METHODS: The transmission route was investigated by nasal screening for Panton-Valentine leukocidin (PVL)-producing Staphylococcus aureus (PVL-SA), subsequent microbiological investigation including whole genome sequencing and a questionnaire-based analysis of epidemiological information...
2017: PloS One
https://www.readbyqxmd.com/read/29238933/hospital-acquired-methicillin-resistant-staphylococcus-aureus-mrsa-from-pakistan-molecular-characterisation-by-microarray-technology
#8
Bushra Jamil, Darius Gawlik, Muhammad Ali Syed, Asim Ali Shah, Shahid Ahmad Abbasi, Elke Müller, Annett Reißig, Ralf Ehricht, Stefan Monecke
The prevalence of methicillin-resistant Staphylococcus aureus (MRSA) in Pakistan is known to be high, but very few studies have described the molecular epidemiology of the different MRSA clones circulating in the country. Forty-four MRSA isolates were collected from two tertiary care hospitals of the Rawalpindi district of Pakistan. All strains were identified by a conventional phenotypic method and then subjected to genotyping by microarray hybridisation. Six clonal complexes (CCs) and 19 strains were identified...
December 14, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29237065/methicillin-resistant-staphylococcus-aureus-in-papua-new-guinea-a-community-nasal-colonization-prevalence-study
#9
Moses Laman, Andrew Greenhill, Geoffrey W Coombs, Owen Robinson, Julie Pearson, Timothy M E Davis, Laurens Manning
Background: There are few epidemiological data available to inform a national response to community-acquired methicillin-resistant Staphylococcus aureus (MRSA) in Papua New Guinea (PNG). Methods: We performed a cross-sectional survey to determine the pattern of MRSA nasal colonization and the diversity of circulating MRSA clones among adults and adolescents in Madang Province, PNG. Results: S. aureus nasal colonization was confirmed in 44 (17...
December 11, 2017: Transactions of the Royal Society of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/29234317/panton-valentine-leucocidin-pvl-as-a-potential-indicator-for-prevalence-duration-and-severity-of-staphylococcus-aureus-osteomyelitis
#10
Bei Jiang, Yinan Wang, Zihan Feng, Lei Xu, Li Tan, Shuang Zhao, Yali Gong, Cheng Zhang, Xiaoqiang Luo, Shu Li, Xiancai Rao, Yizhi Peng, Zhao Xie, Xiaomei Hu
Staphylococcus aureus is the most common cause of the difficult-to-treat osteomyelitis (OM). To better diagnose and manage S. aureus OM, especially for severe and long duration cases, indicators for risk prediction and severity evaluation are needed. Here, 139 clinical S. aureus isolates from orthopedic infections were divided into OM group (60 isolates from 60 OM patients) and non-OM group (79 isolates from 79 non-OM patients). Molecular types, antimicrobial susceptibility, and virulence factor profiles were evaluated and compared between the two groups to identify potential indicators associated with the prevalence of S...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29179212/luks-pv-regulated-microrna-125a-3p-promotes-thp-1-macrophages-differentiation-and-apoptosis-by-down-regulating-nf1-and-bcl-2
#11
Xiao-Xi Sun, Shan-Shan Zhang, Chun-Yang Dai, Jing Peng, Qing Pan, Liang-Fei Xu, Xiao-Ling Ma
BACKGROUND/AIMS: LukS-PV is a component of Panton-Valentine leukocidin (PVL). We have previously demonstrated that LukS-PV potently promoted differentiation and induced apoptosis in THP-1 cells. However, the precise mechanisms of these actions remain unknown. MicroRNAs (miRs) play important roles in cellular differentiation and apoptosis. This study aimed to investigate the role of miR-125a-3p in LukS-PV-regulated differentiation and apoptosis and its underlying mechanism in THP-1 cells...
November 27, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29174420/panton-valentine-leucocidin-pvl-staphylococcus-aureus-a-position-statement-from-the-international-society-of-chemotherapy
#12
EDITORIAL
Kordo Saeed, Ian Gould, Silvano Espositio, Nusreen Ahmad-Saeed, Salman Shaheer Ahmed, Emine Alp, Abhijit M Bal, Matteo Bassetti, Eric Bonnet, Monica Chan, Geoffrey Coombs, Stephanie Dancer, Michael Z David, Giuseppe De Simone, Matthew Dryden, Luca Guardabassi, Leif G Hanitsch, Karolin Hijazi, Renate Krüger, Andie Lee, Rasmus Leistner, Pasquale Pagliano, Elda Righi, Sylke Schneider-Burrus, Robert Leo Skov, Pierre Tattevin, Willem Van Wamel, Margreet C Vos, Andreas Voss
No abstract text is available yet for this article.
November 21, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29174419/co-infection-with-influenza-associated-acute-respiratory-distress-syndrome-requiring-extracorporeal-membrane-oxygenation
#13
Sacha Rozencwajg, Nicolas Bréchot, Matthieu Schmidt, Guillaume Hékimian, Guillaume Lebreton, Sébastien Besset, Guillaume Franchineau, Ania Nieszkowska, Pascal Leprince, Alain Combes, Charles-Edouard Luyt
Co-infection frequency and impact among influenza-associated acute respiratory distress syndrome (ARDS) patients requiring extracorporeal membrane oxygenation (ECMO) are not known. This retrospective, observational analysis concerned data prospectively collected from patients admitted to our medical intensive care unit (ICU) who received ECMO support for influenza-associated ARDS between 2009 and 2016. Co-infection was defined as occurring within 48 hours following ICU admission. Among the 77 ARDS patients requiring ECMO support, 39 (51%) developed co-infections, with Staphylococcus aureus (18 (46%) of the co-infected) being the most prevalent pathogen...
November 21, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29158906/molecular-characterization-of-panton-valentine-leukocidin-pvl-toxin-encoding-phages-from-south-india
#14
V Balaji, D B Yamuna, Y I Francis, G Priya Doss
A total of 19 methicillin-resistant Staphylococcus aureus (MRSA) isolates were investigated for Panton-Valentine leukocidin (PVL) toxin, PVL gene sequence variation and PVL-encoding phages. Whole genome sequencing was performed for all isolates. Analysis of MRSA isolates (n = 19) confirmed that most MRSA (n = 11) were positive for the PVL gene and were multidrug resistant. ST772-MRSA-V was the predominant PVL-positive MRSA clone, although all of them were found to carry the ΦIND772PVL phage in the genome...
November 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/29158405/origin-evolution-and-global-transmission-of-community-acquired-staphylococcus-aureus-st8
#15
Lena Strauß, Marc Stegger, Patrick Eberechi Akpaka, Abraham Alabi, Sebastien Breurec, Geoffrey Coombs, Beverly Egyir, Anders Rhod Larsen, Frederic Laurent, Stefan Monecke, Georg Peters, Robert Skov, Birgit Strommenger, François Vandenesch, Frieder Schaumburg, Alexander Mellmann
USA300 is a pandemic clonal lineage of hypervirulent, community-acquired, methicillin-resistant Staphylococcus aureus (CA-MRSA) with specific molecular characteristics. Despite its high clinical relevance, the evolutionary origin of USA300 remained unclear. We used comparative genomics of 224 temporal and spatial diverse S. aureus isolates of multilocus sequence type (ST) 8 to reconstruct the molecular evolution and global dissemination of ST8, including USA300. Analyses of core SNP diversity and accessory genome variations showed that the ancestor of all ST8 S...
November 20, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29142545/rapid-screening-of-pyogenic-staphylococcus-aureus-for-confirmation-of-genus-and-species-methicillin-resistance-and-virulence-factors-by-using-two-novel-multiplex-pcr
#16
Abdul Haque, Asma Haque, Muhammad Saeed, Aysha Azhar, Samreen Rasool, Sidra Shan, Beenish Ehsan, Zohaib Nisar
Objectives: Emergence of methicillin resistant Staphylococcus aureus (MRSA) is a major medical problem of current era. These bacteria are resistant to most drugs and rapid diagnosis can provide a clear guideline to clinicians. They possess specific virulence factors and relevant information can be very useful. We designed this study to develop multiplex PCRs to provide rapid information. Methods: We studied 60 Staphylococcus aureus isolates and detected methicillin resistance by cefoxitin sensitivity and targeting of mecA gene...
September 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/29124834/prevalence-and-characterisation-of-staphylococcus-aureus-causing-community-acquired-skin-and-soft-tissue-infections-on-java-and-bali-indonesia
#17
Dewi Santosaningsih, Sanarto Santoso, Nanik Setijowati, Harun A Rasyid, Nyoman S Budayanti, Ketut Suata, Dicky B Widhyatmoko, Priyo B Purwono, Kuntaman Kuntaman, Damayanti Damayanti, Cita R S Prakoeswa, Mitchell Laurens, Josephine W I van Nierop, Geraldine L Nanninga, Neline Oudenes, Michelle de Regt, Susan V Snijders, Henri A Verbrugh, Juliëtte A Severin
OBJECTIVES: To define the role of Staphylococcus aureus in community settings among patients with skin and soft tissue infections (SSTI) in Indonesia. METHODS: Staphylococcus aureus were cultured from anterior nares, throat and wounds of 567 ambulatory patients presenting with SSTI. The mecA gene and genes encoding Panton-Valentine leukocidin (PVL; lukF-PV and lukS-PV) and exfoliative toxin (ET; eta and etb) were determined by PCR. Clonal relatedness among methicillin-resistant S...
November 10, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/29117225/genomic-comparison-between-staphylococcus-aureus-gn-strains-clinically-isolated-from-a-familial-infection-case-is1272-transposition-through-a-novel-inverted-repeat-replacing-mechanism
#18
Tsai-Wen Wan, Wataru Higuchi, Olga E Khokhlova, Wei-Chun Hung, Yasuhisa Iwao, Masataka Wakayama, Noriyoshi Inomata, Tomomi Takano, Yu-Tzu Lin, Olga V Peryanova, Kenji K Kojima, Alla B Salmina, Lee-Jene Teng, Tatsuo Yamamoto
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...
2017: PloS One
https://www.readbyqxmd.com/read/29115975/pvl-overexpression-due-to-genomic-rearrangements-and-mutations-in-the-s-aureus-reference-strain-atcc25923
#19
Bettina Stieber, Artur Sabat, Stefan Monecke, Peter Slickers, Viktoria Akkerboom, Elke Müller, Alexander W Friedrich, Ralf Ehricht
OBJECTIVE: ATCC25923 is a Staphylococcus aureus strain that is positive for the Panton Valentin leukocidin. It has been used for decades as reference strain. We observed that two separately maintained clones of ATCC25923 ("G477 and G478") differed grossly in the expression of this toxin. For that reason, both clones were sequenced using an Illumina MiSeq instrument. After assembling, the final sequences were analyzed and mapped to a previously published ATCC25923 sequence (GenBank CP009361) using bl2seq from the NCBI Blast2 package...
November 7, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/29084288/closely-related-methicillin-resistant-staphylococcus-aureus-isolates-from-retail-meat-cows-with-mastitis-and-humans-in-japan
#20
Tomomi Sato, Masaru Usui, Noriko Konishi, Akemi Kai, Hidehito Matsui, Hideaki Hanaki, Yutaka Tamura
Methicillin-resistant Staphylococcus aureus (MRSA) is a pervasive healthcare-acquired (HA) pathogen with recent emergence as a community-acquired (CA) pathogen. To elucidate whether meat mediates MRSA transmission between animals and humans in Japan, this study examined MRSA isolates from retail meat (n = 8), cows with mastitis (n = 7), and humans (HA-MRSA = 46 and CA-MRSA = 54) by molecular typing, virulence gene analyses, and antimicrobial susceptibility testing. MRSA isolates from retail meat were classified into sequence type (ST) 8/spa type t1767 (n = 4), ST8/t4133 (n = 1), ST59/t3385 (n = 1), ST88/t375 (n = 1), and ST509/t375 (n = 1)...
2017: PloS One
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