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staphylococcus lugdunensis

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https://www.readbyqxmd.com/read/29063699/characterization-of-aicar-transformylase-imp-cyclohydrolase-atic-from-staphylococcus-lugdunensis
#1
Preeti Verma, Bibekananda Kar, Ritu Varshney, Partha Roy, Ashwani K Sharma
The 5-aminoimidazole-4-carboxamide ribonucleotide (AICAR) transformylase/inosine monophosphate (IMP) cyclohydrolase (ATIC) catalyzes final two steps of purine nucleotide de novo biosynthetic pathway. The present study reports the characterization of ATIC from Staphylococcus lugdunensis (SlugATIC). Apart from kinetic analysis and a detailed biophysical characterization of SlugATIC, the role of ATIC in cell proliferation has been demonstrated for the first time. The purified recombinant SlugATIC and its truncated domains exists mainly in dimeric form was revealed in gel filtration and glutaraldehyde cross linking studies...
October 24, 2017: FEBS Journal
https://www.readbyqxmd.com/read/29035784/concentrations-of-staphylococcus-species-in-indoor-air-as-associated-with-other-bacteria-season-relative-humidity-air-change-rate-and-s-aureus-positive-occupants
#2
Anne Mette Madsen, Saloomeh Moslehi-Jenabian, Md Zohorul Islam, Mika Frankel, Michal Spilak, Margit W Frederiksen
The aim of this study was to obtain knowledge about concentrations of Staphylococcus aureus, MRSA (methicillin-resistant S. aureus), and other Staphylococcus species in indoor air in Greater Copenhagen and about factors affecting the concentrations. The effects of season, temperature, relative humidity, air change rate (ACR), other bacterial genera, area per occupant, and presence of S. aureus-positive occupants were studied. In samples from 67 living rooms, S. hominis, S. warneri, S. epidermidis, and S. capitis were found in 13-25%; S...
October 13, 2017: Environmental Research
https://www.readbyqxmd.com/read/29022273/staphylococcus-lugdunensis-infections-of-the-skin-and-soft-tissue-a-case-series-and-review
#3
Lucas A Heldt Manica, Philip R Cohen
INTRODUCTION: Staphylococcus lugdunensis (S. lugdunensis) is a coagulase-negative, Gram-positive bacterium that can be isolated as a component of normal skin flora in humans. However, more recently, it has also been documented as a culprit in skin and soft tissue infections. We describe the clinical features of five individuals with S. lugdunensis-associated skin infections. We review the characteristics of other patients that were previously described with this organism as the causative agent of skin infection...
October 11, 2017: Dermatology and Therapy
https://www.readbyqxmd.com/read/28962025/characterization-of-two-novel-variants-of-staphylococcal-cassette-chromosome-mec-elements-in-oxacillin-resistant-staphylococcus-lugdunensis
#4
Shih-Cheng Chang, Ming-Hsun Lee, Chun-Fu Yeh, Tsui-Ping Liu, Jung-Fu Lin, Cheng-Mao Ho, Jang-Jih Lu
Objectives: Staphylococcus lugdunensis , a species of CoNS, has become an important hospital pathogen because of increasing resistance to β-lactam antibiotics such as methicillin and oxacillin. Methicillin resistance is mainly due to the acquisition of the staphylococcal cassette chromosome (SCC) mec (SCC mec ). Little is known about the structure of SCC mec in methicillin- or oxacillin-resistant CoNS. Methods: WGS was performed to determine the structure of SCC mec elements of two clinical S...
August 23, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28943172/staphylococcus-lugdunensis-small-colony-variant-conversion-resulting-in-chronic-prosthetic-joint-infection
#5
X Argemi, S Dahyot, J Lebeurre, Y Hansmann, C Ronde Oustau, G Prévost
No abstract text is available yet for this article.
November 2017: Médecine et Maladies Infectieuses
https://www.readbyqxmd.com/read/28937308/particularities-of-staphylococcus-lugdunensis-in-orthopaedic-infections
#6
Morad Mohamad, Ilker Uçkay, Didier Hannouche, Hermès Miozzari
No abstract text is available yet for this article.
September 22, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28906479/characterization-of-vb_saum-frusau02-a-twort-like-bacteriophage-isolated-from-a-therapeutic-phage-cocktail
#7
Katarzyna Leskinen, Henni Tuomala, Anu Wicklund, Jenni Horsma-Heikkinen, Pentti Kuusela, Mikael Skurnik, Saija Kiljunen
Staphylococcus aureus is a commensal and pathogenic bacterium that causes infections in humans and animals. It is a major cause of nosocomial infections worldwide. Due to increasing prevalence of multidrug resistance, alternative methods to eradicate the pathogen are necessary. In this respect, polyvalent staphylococcal myoviruses have been demonstrated to be excellent candidates for phage therapy. Here we present the characterization of the bacteriophage vB_SauM-fRuSau02 (fRuSau02) that was isolated from a commercial Staphylococcus bacteriophage cocktail produced by Microgen (Moscow, Russia)...
September 14, 2017: Viruses
https://www.readbyqxmd.com/read/28839395/staphylococcus-lugdunensis-and-trichophyton-tonsurans-infection-in-synthetic-hair-implants
#8
Pedro Colli, Antonia Fellas, Ralph M Trüeb
Synthetic hair implants are considered in alopecia when the patient requests an immediate result with minor surgery and with a poor donor area. However, the procedure has historically been marred by poor quality fiber and performance resulting in serious complications. Nevertheless, companies continue to market the procedure with the claim that previous problems have been sorted out. We report a case of inflammation in synthetic hair implants, in which microbiological studies revealed infection with Staphylococcus lugdunensis and Trichophyton tonsurans...
April 2017: International Journal of Trichology
https://www.readbyqxmd.com/read/28835477/is-staphylococcus-lugdunensis-significant-in-clinical-samples
#9
REVIEW
Xavier Argemi, Yves Hansmann, Philippe Riegel, Gilles Prévost
The implication of coagulase-negative staphylococci in human diseases is a major issue, particularly in hospital settings wherein these species often act as opportunistic pathogens. In addition, some coagulase-negative staphylococci such as S. lugdunensis have emerged as pathogenic bacteria, implicated in severe infections, particularly, osteoarticular infections, foreign-body-associated infections, bacteremia, and endocarditis. In vitro studies have shown the presence of several putative virulence factors such as adhesion factors, biofilm production, and proteolytic factors that might explain clinical manifestations...
November 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28751155/primary-lung-abscess-caused-by-staphylococcus-lugdunensis
#10
Deng-Wei Chou, Chao-Tai Lee
Staphylococcus lugdunensis, a strain of coagulase-negative staphylococci, is part of the normal flora of human skin but can cause multiple infections at various sites. This microorganism has emerged as a major human pathogen. However, no study has reported primary lung abscess caused by S. lugdunensis. A 54-year-old alcoholic man without relevant past medical history was admitted because of primary lung abscesses. Empirical amoxicillin/clavulanate therapy was initially administered; however, the patient had persistent pleuritic chest pain and fever...
July 24, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28747897/identification-of-emerging-human-mastitis-pathogens-by-maldi-tof-and-assessment-of-their-antibiotic-resistance-patterns
#11
María Marín, Rebeca Arroyo, Irene Espinosa-Martos, Leónides Fernández, Juan M Rodríguez
Lactational mastitis constitutes one of the main causes of undesired weaning, depriving the mother-infant pair from the benefits of breastfeeding; therefore, this condition should be considered a relevant public health issue. The role of specific microorganisms remains unclear since human milk cultures and antibiotic susceptibility testing (AST) are not routinely performed, despite the fact that this would be key to ensure an early and effective diagnosis and treatment. The objective of this study was to describe the culturable microbial diversity in 647 milk samples from breastfeeding women with clinical symptoms of mastitis by Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF) VITEK MS technology and to analyze the antimicrobial susceptibility profiles of a collection of isolates from these samples by the VITEK 2 AST system...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28717325/tetracycline-resistance-phenotypes-and-genotypes-of-coagulase-negative-staphylococcal-isolates-from-bubaline-mastitis-in-egypt
#12
K A Abd El-Razik, A A Arafa, R H Hedia, E S Ibrahim
AIM: This study was devoted to elucidate the tetracycline resistance of coagulase-negative staphylococci (CNS) derived from normal and subclinical mastitic (SCM) buffaloes' milk in Egypt. MATERIALS AND METHODS: A total of 81 milk samples from 46 normal buffalo milk samples and 35 SCM buffalo milk samples at private dairy farms of Egypt were used in this study. CNS were identified using phenotypic and molecular methods (polymerase chain reaction [PCR]). CNS isolates were tested for tetracycline resistance using routine methods and multiplex PCR targeting tetracycline (tet) resistance genes followed by sequencing of positive PCR products and phylogenetic analysis...
June 2017: Veterinary World
https://www.readbyqxmd.com/read/28702199/prevalence-of-methicillin-resistance-and-macrolide-lincosamide-streptogramin-b-resistance-in-staphylococcus-haemolyticus-among-clinical-strains-at-a-tertiary-care-hospital-in-thailand
#13
S Teeraputon, P Santanirand, T Wongchai, W Songjang, N Lapsomthob, D Jaikrasun, S Toonkaew, P Tophon
Staphylococcus spp. is a major cause of nosocomial infection and sepsis. However, increasing drug resistance is becoming a challenge to microbiologists. The purpose of this study was to identify and determine antimicrobial resistance phenotypes and drug resistance genes of clinical coagulase-negative staphylococci (CoNS) isolates at Mae Sot Hospital in Tak province, Thailand. A total of 229 CoNS isolates were collected from clinical specimens during two periods in 2014 and in 2015. Staphylococcus haemolyticus was the most prevalent species (37...
September 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/28638293/septic-embolic-stroke-resulting-from-staphylococcus-lugdunensis-endocarditis
#14
Htoo Kyaw, Atif Z Shaikh, Gokul Yaratha, Misra Deepika
BACKGROUND: Staphylococcus lugdunensis, a member of the coagulase-negative staphylococci (CoNS), has been recognized as a causal organism for infective endocarditis since the 1980s. Although most CoNS have an insidious and chronic nature, they are involved in a variety of systemic infections. S lugdunensis infective endocarditis is a rare entity but is as catastrophic as Staphylococcus aureus infective endocarditis and requires aggressive antibiotic therapy and, typically, valve replacement...
2017: Ochsner Journal
https://www.readbyqxmd.com/read/28607020/signal-biosynthesis-inhibition-with-ambuic-acid-as-a-strategy-to-target-antibiotic-resistant-infections
#15
Daniel A Todd, Corey P Parlet, Heidi A Crosby, Cheryl L Malone, Kristopher P Heilmann, Alexander R Horswill, Nadja B Cech
There has been major interest by the scientific community in antivirulence approaches against bacterial infections. However, partly due to a lack of viable lead compounds, antivirulence therapeutics have yet to reach the clinic. Here we investigate the development of an antivirulence lead targeting quorum sensing signal biosynthesis, a process that is conserved in Gram-positive bacterial pathogens. Some preliminary studies suggest that the small molecule ambuic acid is a signal biosynthesis inhibitor. To confirm this, we constructed a methicillin-resistant Staphylococcus aureus (MRSA) strain that decouples autoinducing peptide (AIP) production from regulation and demonstrate that AIP production is inhibited in this mutant...
August 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28529089/kinetics-of-biofilm-formation-by-staphylococcus-lugdunensis-strains-in-bone-and-joint-infections
#16
Xavier Argemi, Gilles Prévost, Philippe Riegel, Christian Provot, Stéphanie Badel-Berchoux, François Jehl, Elodie Olivares, Yves Hansmann
OBJECTIVE: To describe the clinical presentation and 1-year follow-up of patients with bone and joint infections (BJIs) caused by Staphylococcus lugdunensis and evaluate its biofilm-forming capacities. PATIENTS AND METHODS: Overall, 28 patients with BJIs from VISLISI clinical trials were included. We evaluated 1-year clinical follow-up and analyzed biofilm production kinetics of the 28 strains using the BioFilm Ring Test®. RESULTS: Of all patients, 12 had osteoarticular infections without material and 16 had prosthetic joint infections, of which 9 underwent a 1-stage revision procedure...
August 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28524741/a-surgical-case-of-mycotic-aneurysm-with-staphylococcus-lugdunensis-endocarditis
#17
Kosuke Mukaihara, Kazuhisa Matsumoto, Jun Kadono, Yutaka Imoto
A 74-year-old man with a history of mitral valve repair was referred to our hospital with fever and diagnosed with mitral valve endocarditis involving occlusion of the superior mesenteric artery. Bacterial cultures showed Staphylococcus lugdunensis. Despite antibiotic therapy, orthopnea ensued due to valve destruction. Emergency mitral valve replacement was performed. Computed tomography on postoperative day 10 revealed a rapidly expanding mycotic aneurysm of the superior mesenteric artery. Aneurysmectomy was undertaken...
May 2017: Asian Cardiovascular & Thoracic Annals
https://www.readbyqxmd.com/read/28506660/specific-clones-of-staphylococcus-lugdunensis-may-be-associated-with-colon-carcinoma
#18
Norihisa Noguchi, Mari Fukuzawa, Takeaki Wajima, Kaoru Yokose, Masae Suzuki, Hidemasa Nakaminami, Takashi Kawai, Fuminori Moriyasu, Masanori Sasatsu
Staphylococcus lugdunensis produces a tannase with activity that may be associated with the onset of colon carcinoma. To clarify this feature of colon carcinoma-associated S. lugdunensis, we obtained isolates from healthy subjects and patients with colon adenomas and carcinomas and analyzed their genetic backgrounds. In total, 40 S. lugdunensis isolates from 288 rectal swabs collected between 2002 and 2008 were used. These isolates were classified into four groups according to the diseases of the subjects: healthy (n=13), colon carcinoma (n=13), colon adenoma (n=9), and unknown (n=5)...
May 11, 2017: Journal of Infection and Public Health
https://www.readbyqxmd.com/read/28486995/antimicrobial-resistance-and-virulence-characterization-of-staphylococcus-aureus-and-coagulase-negative-staphylococci-from-imported-beef-meat
#19
Kamelia Osman, Avelino Alvarez-Ordóñez, Lorena Ruiz, Jihan Badr, Fatma ElHofy, Khalid S Al-Maary, Ihab M I Moussa, Ashgan M Hessain, Ahmed Orabi, Alaa Saad, Mohamed Elhadidy
BACKGROUND: The objectives of this study were to characterize the diversity and magnitude of antimicrobial resistance among Staphylococcus species recovered from imported beef meat sold in the Egyptian market and the potential mechanisms underlying the antimicrobial resistance phenotypes including harboring of resistance genes (mecA, cfr, gyrA, gyrB, and grlA) and biofilm formation. RESULTS: The resistance gene mecA was detected in 50% of methicillin-resistant non-Staphylococcus aureus isolates (4/8)...
May 10, 2017: Annals of Clinical Microbiology and Antimicrobials
https://www.readbyqxmd.com/read/28444231/whole-genome-sequencing-of-seven-strains-of-staphylococcus-lugdunensis-allows-identification-of-mobile-genetic-elements
#20
Xavier Argemi, Véronique Martin, Valentin Loux, Sandrine Dahyot, Jérémie Lebeurre, Aurélien Guffroy, Mickael Martin, Aurélie Velay, Daniel Keller, Philippe Riegel, Yves Hansmann, Nicodème Paul, Gilles Prévost
Coagulase negative staphylococci are normal inhabitant of the human skin flora that account for an increasing number of infections, particularly hospital-acquired infections. Staphylococcus lugdunensis has emerged as a most virulent species causing various infections with clinical characteristics close to what clinicians usually observe with Staphylococcus aureus and both bacteria share more than 70% of their genome. Virulence of S. aureus relies on a large repertoire of virulence factors, many of which are encoded on mobile genetic elements...
May 1, 2017: Genome Biology and Evolution
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