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https://www.readbyqxmd.com/read/28533831/molecular-characterisation-of-methicillin-resistant-staphylococcus-aureus-mrsa-isolated-at-a-large-referral-hospital-in-zambia
#1
Mulemba Tillika Samutela, Annie Kalonda, James Mwansa, Chileshe Lukwesa-Musyani, John Mwaba, Enoch Mulowa Mumbula, Darlington Mwenya, Edgar Simulundu, Geoffrey Kwenda
INTRODUCTION: Methicillin-resistant Staphylococcus aureus (MRSA) is globally recognized as an important public health problem. Whereas comprehensive molecular typing data of MRSA strains is available, particularly in Europe, North America and Australia, similar information is very limited in sub-Saharan Africa including Zambia. METHODS: In this study, thirty two clinical isolates of Staphylococcus aureus, collected at a large referral hospital in Lusaka, Zambia between June 2009 and December 2012 were analysed by Staphylococcal cassette chromosome mec (SCCmec), Staphylococcus protein A gene typing (spa) and detection of the Panton-Valentine Leukocidin genes (pvl)...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28522992/molecular-characterization-of-community-acquired-staphylococcus-aureus-bacteremia-in-young-children-in-southern-mozambique-2001-2009
#2
Delfino Vubil, Marcelino Garrine, Ulla Ruffing, Sozinho Acácio, Betuel Sigaúque, Pedro L Alonso, Lutz von Müller, Mathias Herrmann, Inácio Mandomando
Background: The emergence of community-acquired Staphylococcus aureus infections is increasingly recognized as life threating problem worldwide. In Manhiça district, southern Mozambique, S. aureus is the leading cause of community-acquired bacteremia in neonates. Methods: Eighty-four S. aureus isolates from children less than 5 years admitted to Manhiça District Hospital from 2001 to 2009 were randomly selected and genetically characterized by DNA microarray and spa typing. Antimicrobial susceptibility was determined by VITEK 2...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28515479/acquisition-of-virulence-factors-in-livestock-associated-mrsa-lysogenic-conversion-of-cc398-strains-by-virulence-gene-containing-phages
#3
Britta Kraushaar, Jens Andre Hammerl, Marina Kienöl, Marie Luise Heinig, Nina Sperling, Mai Dinh Thanh, Jochen Reetz, Claudia Jäckel, Alexandra Fetsch, Stefan Hertwig
Staphylococcus aureus MRSA strains belonging to the clonal complex 398 (CC398) are highly prevalent in livestock and companion animals but may also cause serious infections in humans. CC398 strains in livestock usually do not possess well-known virulence factors that can be frequently found in other MRSA sequence types (ST). Since many staphylococcal virulence genes are residing on the genomes of temperate phages, the question arises why livestock-associated (LA-) CC398 strains are only rarely infected by those phages...
May 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28504817/biofilm-formation-in-catheter-related-infections-by-panton-valentine-leukocidin-producing-staphylococcus-aureus
#4
Giorgio Silva-Santana, Kátia C Lenzi-Almeida, Vânia G S Lopes, Fábio Aguiar-Alves
The use of invasive techniques, such as intravascular catheter insertion, and the formation of biofilms in several devices by methicillin-resistant Staphylococcus aureus (MRSA) have contributed to the increased number of septic patients, morbidity and mortality. This study aimed to evaluate the virulence of strains through catheter colonization and identification of microbial biofilm, as well as pathological changes on the colonized skin. An experimental biofilm formation model utilized catheter fragments implanted subcutaneously in 25 Swiss mice...
December 2016: International Microbiology: the Official Journal of the Spanish Society for Microbiology
https://www.readbyqxmd.com/read/28504494/staphylococcus-aureus-nasal-carriage-and-its-antibiotic-resistance-profiles-in-children-in-high-altitude-areas-of-southwestern-china
#5
Zongrong Gong, Min Shu, Qing Xia, Shan Tan, Wei Zhou, Yu Zhu, Chaomin Wan
BACKGROUND/AIM: To describe the epidemiological profile of nasal carriage of Staphylococcus aureus (S. aureus) strains, its antibiotic resistance and mecA and Panton Valentine leukocidin (PVL) genes presence, in school children residing in high altitude areas of Southwestern China. METHODS: The cross sectional study screened nasal swabs taken from students for S.aureus. PCR was performed to identify mecA and PVL genes. RESULTS: Of the total 314 children 5...
June 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28473827/prevalence-virulence-genes-antimicrobial-susceptibility-and-genetic-diversity-of-staphylococcus-aureus-from-retail-aquatic-products-in-china
#6
Dongli Rong, Qingping Wu, Mingfang Xu, Jumei Zhang, Shubo Yu
Staphylococcus aureus is an important food-borne opportunistic pathogen that frequently causes severe blood and tissue infections or even fatal illnesses. Although S. aureus has been extensively studied in livestock and poultry foods in China, limited information has been reported in aquatic products. Accordingly, in this study, we aimed to characterize S. aureus in aquatic products purchased from retail markets in China. In total, 320 aquatic food samples were collected from 32 provincial capitals in China...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28471400/epidemiology-and-management-of-acute-haematogenous-osteomyelitis-in-a-tertiary-paediatric-center
#7
Elena Chiappini, Caterina Camposampiero, Simone Lazzeri, Giuseppe Indolfi, Maurizio De Martino, Luisa Galli
Background: Paediatric acute hematogenous osteomyelitis (AHOM) is a serious disease requiring early diagnosis and treatment. To review the clinical presentation, management and organisms responsible for AHOM, and to explore risk factors for complicated AHOM, a large cohort referring to a single center over a 6-year period was evaluated. Methods: Data from children with AHOM, hospitalized between 2010 and 2015, and aged > 1 month, were retrospectively collected and analyzed. Results: 121 children (median age 4...
May 4, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28457548/molecular-characterization-and-antibiotic-resistance-of-staphylococcus-spp-isolated-from-cheese-processing-plants
#8
Marjory Xavier Rodrigues, Nathália Cristina Cirone Silva, Júlia Hellmeister Trevilin, Melina Mary Bravo Cruzado, Tsai Siu Mui, Fábio Rodrigo Sanches Duarte, Carmen J Contreras Castillo, Solange Guidolin Canniatti-Brazaca, Ernani Porto
The aim of this research paper was to characterize coagulase-positive and coagulase-negative staphylococci from raw milk, Minas cheese, and production lines of Minas cheese processing. One hundred isolates from 3 different cheese producers were characterized using molecular approaches, such as PCR, molecular typing, and DNA sequencing. Staphylococcus aureus (88% of the isolates) was the most abundant followed by Staphylococcus epidermidis, Staphylococcus hyicus, and Staphylococcus warneri. Among the 22 enterotoxin genes tested, the most frequent was seh (62% of the isolates), followed by selx and ser...
April 27, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28455832/structure-and-function-of-the-two-component-cytotoxins-of-staphylococcus-aureus-learnings-for-designing-novel-therapeutics
#9
Adriana Badarau, Nikolina Trstenjak, Eszter Nagy
Staphylococcus aureus can produce up to five different bi-component cytotoxins: two gamma-hemolysins HlgAB and HlgCB, and leukocidins SF-PV (Panton Valentine leukocidin), ED (LukED) and GH (LukGH, also called LukAB). Their major function in S. aureus pathogenesis is to evade innate immunity by attacking phagocytic cells and to support bacterial growth by lysing red blood cells. The five cytotoxins display different levels of amino acid sequence conservation (30-82%), but all form a remarkably similar beta-barrel type pore structure (greatly resembling the mono-component toxin alpha-hemolysin) that inserts into the target cell membrane leading to necrotic cell death...
April 29, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28442219/virulence-potential-of-staphylococcus-aureus-isolates-from-buruli-ulcer-patients
#10
Nana Ama Amissah, Monika A Chlebowicz, Anthony Ablordey, Caitlin S Tetteh, Isaac Prah, Tjip S van der Werf, Alex W Friedrich, Jan Maarten van Dijl, Ymkje Stienstra, John W Rossen
Buruli ulcer (BU) is a necrotizing infection of the skin and subcutaneous tissue caused by Mycobacterium ulcerans. BU wounds may also be colonized with other microorganisms including Staphylococcus aureus. This study aimed to characterize the virulence factors of S. aureus isolated from BU patients. Previously sequenced genomes of 21 S. aureus isolates from BU patients were screened for the presence of virulence genes. The results show that all S. aureus isolates harbored on their core genomes genes for known virulence factors like α-hemolysin, and the α- and β-phenol soluble modulins...
April 19, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28441421/high-prevalence-of-mrsa-and-esbl-among-asylum-seekers-in-the-netherlands
#11
Sofanne J Ravensbergen, Matthijs Berends, Ymkje Stienstra, Alewijn Ott
Migration is one of the risk factors for the spread of multidrug-resistant organisms (MDRO). The increasing influx of migrants challenges local health care systems. To provide evidence for both hospital hygiene measure and empirical antibiotic therapy, we analysed all cultures performed in asylum seekers between January 1st 2014 and December 31st 2015 for methicillin resistant Staphylococcus aureus (MRSA) and for multidrug-resistant Enterobacteriaceae (MDRE). We compared these with cultures from the Dutch patient population with risk factors for carriage of MDRO...
2017: PloS One
https://www.readbyqxmd.com/read/28409124/hospital-dissemination-of-tst-1-positive-clonal-complex-5-cc5-methicillin-resistant-staphylococcus-aureus
#12
Min Wang, Yi Zheng, Jose R Mediavilla, Liang Chen, Barry N Kreiswirth, Yajun Song, Ruifu Yang, Hong Du
Methicillin-resistant Staphylococcus aureus (MRSA), is one of the most prevalent clinical pathogens isolated from hospital settings, and has increasingly identified in community settings. In China, the SCCmecIII-ST239 strains are disseminated in different geographic regions, accounting for >75% of all MRSA isolates in some national studies. Here we characterized 150 non-duplicate MRSA isolates collected from February 2012 to May 2013 in a tertiary hospital in Suzhou, Eastern China, to explore the molecular epidemiology...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28407796/prevalence-of-methicillin-resistant-staphylococcus-aureus-mrsa-infection-and-the-molecular-characteristics-of-mrsa-bacteraemia-over-a-two-year-period-in-a-tertiary-teaching-hospital-in-malaysia
#13
Pik San Sit, Cindy Shuan Ju Teh, Nuryana Idris, I-Ching Sam, Sharifah Faridah Syed Omar, Helmi Sulaiman, Kwai Lin Thong, Adeeba Kamarulzaman, Sasheela Ponnampalavanar
BACKGROUND: Methicillin-resistant Staphylococcus aureus (MRSA) is an established pathogen that causes hospital- and community-acquired infections worldwide. The prevalence rate of MRSA infections were reported to be the highest in Asia. As there is limited epidemiological study being done in Malaysia, this study aimed to determine the prevalence of MRSA infection and the molecular characteristics of MRSA bacteraemia. METHODS: Two hundred and nine MRSA strains from year 2011 to 2012 were collected from a tertiary teaching hospital in Malaysia...
April 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28400021/east-and-west-african-milk-products-are-reservoirs-for-human-and-livestock-associated-staphylococcus-aureus
#14
Christoph Jans, Axel Merz, Sophia Johler, Mario Younan, Sabine A Tanner, Dasel Wambua Mulwa Kaindi, John Wangoh, Bassirou Bonfoh, Leo Meile, Taurai Tasara
Staphylococcus aureus frequently isolated from milk products in sub-Saharan Africa (SSA) is a major pathogen responsible for food intoxication, human and animal diseases. SSA hospital-derived strains are well studied but data on the population structure of foodborne S. aureus required to identify possible staphylococcal food poisoning sources is lacking. Therefore, the aim was to assess the population genetic structure, virulence and antibiotic resistance genes associated with milk-derived S. aureus isolates from Côte d'Ivoire, Kenya and Somalia through spa-typing, MLST, and DNA microarray analysis...
August 2017: Food Microbiology
https://www.readbyqxmd.com/read/28399994/prevalence-and-molecular-characterization-of-staphylococcus-aureus-in-commercially-available-meat-over-a-one-year-period-in-iowa-usa
#15
Dipendra Thapaliya, Brett M Forshey, Jhalka Kadariya, Megan K Quick, Sarah Farina, Ashley O' Brien, Rajeshwari Nair, Amos Nworie, Blake Hanson, Ashley Kates, Shylo Wardyn, Tara C Smith
Methicillin-resistant Staphylococcus aureus (MRSA) is a leading cause of infectious disease morbidity and mortality. Previous studies have confirmed the presence of S. aureus, including MRSA, on raw meat products. We investigated the prevalence and molecular epidemiology of S. aureus and MRSA in commercially-distributed antibiotic-free and conventional raw meat products (n = 3290) purchased in 8 Iowa retail stores weekly for a period of one year. Isolates were characterized using spa typing, and PCR was used to detect the presence of the Panton-Valentine leukocidin (PVL) and mecA genes...
August 2017: Food Microbiology
https://www.readbyqxmd.com/read/28357840/possible-outbreak-of-skin-infections-due-to-panton-valentine-leukocidin-positive-methicillin-resistant-staphylococcus-aureus-on-a-commercial-ship-in-2012-2014
#16
Etienne Bon, Kheira Gadouri, Catherine Avril, Guillaume Camuset, Elsa Balleydier, Isabelle Mathieu, Sandrine Picot, Julien Jaubert, Richard Ballas, Mélanie Colomb-Cotinat, Anne Tristan, Coralie Bouchiat, Laurent Filleul, Frédéric Pagès
No abstract text is available yet for this article.
2017: International Maritime Health
https://www.readbyqxmd.com/read/28336116/purulent-pericarditis-by-staphylococcus-panton-valentine-secondary-to-hair-implants
#17
Leydimar Anmad Shihadeh, Patricia Couto Comba, Carolina Hernández Carballo
No abstract text is available yet for this article.
March 20, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28283923/characterization-of-staphylococcus-aureus-in-goose-feces-from-state-parks-in-northeast-ohio
#18
Dipendra Thapaliya, Mark Dalman, Jhalka Kadariya, Katie Little, Victoria Mansell, Mohammed Y Taha, Dylan Grenier, Tara C Smith
Staphylococcus aureus can colonize a range of species. Although numerous studies have isolated pathogenic bacteria from wild birds, very little is known regarding S. aureus and their potential to spread methicillin-resistant (MRSA) strains. The objective of this study was to determine the presence and molecular characteristics of S. aureus in geese fecal samples collected from ten state parks across Northeast Ohio (NEO). A total of 182 fecal samples from Canada geese (Branta canadensis) were collected in April 2015...
March 10, 2017: EcoHealth
https://www.readbyqxmd.com/read/28273954/community-associated-staphylococcus-aureus-from-sub-saharan-africa-and-germany-a-cross-sectional-geographic-correlation-study
#19
Ulla Ruffing, Abraham Alabi, Theckla Kazimoto, Delfino C Vubil, Ruslan Akulenko, Salim Abdulla, Pedro Alonso, Markus Bischoff, Anja Germann, Martin P Grobusch, Volkhard Helms, Jonas Hoffmann, Winfried V Kern, Peter G Kremsner, Inacio Mandomando, Alexander Mellmann, Georg Peters, Frieder Schaumburg, Sabine Schubert, Lena Strauß, Marcel Tanner, Hagen von Briesen, Laura Wende, Lutz von Müller, Mathias Herrmann
Clonal clusters and gene repertoires of Staphylococcus aureus are essential to understand disease and are well characterized in industrialized countries but poorly analysed in developing regions. The objective of this study was to compare the molecular-epidemiologic profiles of S. aureus isolates from Sub-Saharan Africa and Germany. S. aureus isolates from 600 staphylococcal carriers and 600 patients with community-associated staphylococcal disease were characterized by DNA hybridization, clonal complex (CC) attribution, and principal component (PCA)-based gene repertoire analysis...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28259072/a-rare-case-of-acute-osteomyelitis-due-to-panton-valentine-leukocidin-positive-community-acquired-methicillin-resistant-staphylococcus-aureus-in-a-young-healthy-adult
#20
Toshiyuki Takemori, Osamu Nakamura, Yoshiki Yamagami, Hideki Nishimura, Teruya Kawamoto, Toshihiro Akisue, Tetsuji Yamamoto
INTRODUCTION: Most community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) infections affect skin or soft tissues, while invasive and life-threatening illnesses including osteomyelitis are less common. CA-MRSA infections occur especially in the pediatric age group, while the occurrence of CA-MRSA osteomyelitis in adults is uncommonly reported. PRESENTATION OF CASES: A rare case of acute osteomyelitis of the femur caused by Panton-Valentine leukocidin (PVL)-positive CA-MRSA in a 37-year-old man in good health is presented...
February 17, 2017: International Journal of Surgery Case Reports
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