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Meenaxi Sharma, Javier Nunez-Garcia, Angela M Kearns, Michel Doumith, Patrick R Butaye, M Angeles Argudín, Angela Lahuerta-Marin, Bruno Pichon, Manal AbuOun, Jon Rogers, Richard J Ellis, Christopher Teale, Muna F Anjum
In recent years, there has been an increase in the number of livestock-associated methicillin resistant Staphylococcus aureus (LA-MRSA) clonal complex (CC) 398 recovered from S. aureus isolated animals in the UK. To determine possible origins of 12 LA-MRSA CC398 isolates collected after screening more than a thousand S. aureus animal isolates from the UK between 2013 and 2015, whole genome sequences (WGS) of CC398 European, including UK, and non-European isolates from diverse animal hosts were compared. Phylogenetic reconstruction applied to WGS data to assess genetic relatedness of all 89 isolates, clustered the 12 UK CC398 LA-MRSA within the European sub-lineages, although on different nodes; implicating multiple independent incursions into the UK, as opposed to a single introduction followed by clonal expansion...
2016: Frontiers in Microbiology
Luisa Z Moreno, Mauricio C Dutra, Marina Moreno, Thais Sp Ferreira, Givago Fr da Silva, Carlos Ec Matajira, Ana Paula S Silva, Andrea M Moreno
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) has been mainly related with pig farming, in Europe and North America, with the ST398 as the most commonly identified type of LA-MRSA. Here we present the draft genome of the first vancomycin-intermediate MRSA ST398/t9538 isolated from a swine presenting exudative epidermitis in Brazil.
October 2016: Memórias do Instituto Oswaldo Cruz
Stefan Schwarz, Virve I Enne, Engeline van Duijkeren
This review, for the occasion of the 40th anniversary of the Journal of Antimicrobial Chemotherapy (JAC), gives an overview of the manuscripts related to veterinary bacteriology published in the journal in the past 40 years with a focus on 'One Health' aspects. From 1975 to 2000 the number of manuscripts related to veterinary medicine was limited, but thereafter, the number steadily increased. Most manuscripts published were related to food-producing animals, but companion animals and minor species were also covered...
October 2016: Journal of Antimicrobial Chemotherapy
Nico T Mutters, Christian P Bieber, Catherine Hauck, Gerald Reiner, Veronika Malek, Uwe Frank
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) may colonize and infect humans with close contact to pigs. We compared phenotypic and genotypic differences in resistance and virulence of LA-MRSA isolates from farms and farmers with hospital-acquired methicillin-resistant S. aureus (HA-MRSA) and assessed carriage rates. Samples from pigs (n=330), occupationally exposed personnel (n=63), the farm environment (n=134), and hospital patients (n=220) were obtained. Approximately 50% (166/330) of pigs were MRSA positive...
August 26, 2016: Diagnostic Microbiology and Infectious Disease
Silva Holtfreter, Dorothee Grumann, Veronika Balau, Annette Barwich, Julia Kolata, André Goehler, Stefan Weiss, Birte Holtfreter, Stephanie S Bauerfeind, Paula Döring, Erika Friebe, Nicole Haasler, Kristin Henselin, Katrin Kühn, Sophie Nowotny, Dörte Radke, Katrin Schulz, Sebastian R Schulz, Patricia Trübe, Chi Hai Vu, Birgit Walther, Susanne Westphal, Christiane Cuny, Wolfgang Witte, Henry Völzke, Hans Jörgen Grabe, Thomas Kocher, Ivo Steinmetz, Barbara M Bröker
Population-based studies on Staphylococcus aureus nasal colonization are scarce. We examined the prevalence, resistance and molecular diversity of S. aureus in the general population in Northeast Germany. Nasal swabs were obtained from 3891 adults in the large-scale population-based Study of Health in Pomerania (SHIP-TREND). Isolates were characterized using spa genotyping, as well as antibiotic resistance and virulence gene profiling. We observed an S. aureus prevalence of 27.2%. Nasal S. aureus carriage was associated with male sex and inversely correlated with age...
September 7, 2016: Journal of Clinical Microbiology
Mar Olga Pérez-Moreno, María José Centelles-Serrano, Julio Nogales-López, Marie France Domenech-Spanedda, Carmen Lozano, Carmen Torres
OBJECTIVE: To characterize a methicillin-resistant Staphylococcus aureus (MRSA) isolate responsible for an aggressive infection (peridural and psoas abscess secondary to haematogenous septic arthritis) in a poultry farmer. METHODS: Molecular characterization was performed, including spa- and multilocus sequence typing of the isolate, assessment of its resistance phenotype and detection of tetracycline resistance and of virulence and immune evasion cluster (IEC) genes were performed...
August 31, 2016: Enfermedades Infecciosas y Microbiología Clínica
A M Bal, G W Coombs, M T G Holden, J A Lindsay, G R Nimmo, P Tattevin, R L Skov
The evolution of meticillin-resistant Staphylococcus aureus (MRSA) from meticillin-susceptible S. aureus has been a result of the accumulation of genetic elements under selection pressure from antibiotics. The traditional classification of MRSA into healthcare-associated MRSA (HA-MRSA) and community-associated MRSA (CA-MRSA) is no longer relevant as there is significant overlap of identical clones between these groups, with an increasing recognition of human infection caused by livestock-associated MRSA (LA-MRSA)...
September 2016: Journal of Global Antimicrobial Resistance
Carl Andreas Grøntvedt, Petter Elstrøm, Marc Stegger, Robert Leo Skov, Paal Skytt Andersen, Kjersti Wik Larssen, Anne Margrete Urdahl, Øystein Angen, Jesper Larsen, Solfrid Åmdal, Siri Margrete Løtvedt, Marianne Sunde, Jørgen Vildershøj Bjørnholt
BACKGROUND:  Emerging livestock-associated methicillin-resistant Staphylococcus aureus (MRSA) persist in livestock populations and represent a reservoir for transmission to humans. Understanding the routes of introduction and further transmission is crucial to control this threat to human health. METHODS:  All reported cases of livestock-associated MRSA (CC398) in humans and pigs in Norway between 2008 and 2014 were included. Data were collected during an extensive outbreak investigation, including contact tracing and stringent surveillance...
December 1, 2016: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
M Angeles Argudín, Birgit Lauzat, Britta Kraushaar, Patricia Alba, Yvonne Agerso, Lina Cavaco, Patrick Butaye, M Concepción Porrero, Antonio Battisti, Bernd-Alois Tenhagen, Alexandra Fetsch, Beatriz Guerra
Livestock associated methicillin-resistant Staphylococcus aureus (LA-MRSA) has emerged in animal production worldwide. Most LA-MRSA in Europe belong to the clonal complex (CC) 398. The reason for the LA-MRSA emergence is not fully understood. Besides antimicrobial agents used for therapy, other substances with antimicrobial activity applied in animal feed, including metal-containing compounds might contribute to their selection. Some of these genes have been found in various novel SCCmec cassettes. The aim of this study was to assess the occurrence of metal-resistance genes among a LA-S...
August 15, 2016: Veterinary Microbiology
Frieder Schaumburg, Francis Chinedum Onwugamba, Ruslan Akulenko, Georg Peters, Alexander Mellmann, Robin Köck, Karsten Becker
Livestock is often colonized with ESBL-producing Enterobacteriaceae (ESBL-E) and Staphylococcus aureus. There is a risk that flies spread antimicrobial resistant bacteria from livestock to humans. Here, we screened flies from urban and rural areas near the city of Münster, Germany, for the presence of ESBL-E and S. aureus and compared molecular characteristics of these isolates with those isolated from humans in the same region. In total, 1346 single flies were grinded and cultured overnight in BHI-broth. The broth was cultured on Columbia blood agar and selective media for the detection of S...
June 14, 2016: International Journal of Medical Microbiology: IJMM
Thijs Bosch, Martijn van Luit, Gerlinde N Pluister, Dineke Frentz, Anja Haenen, Fabian Landman, Sandra Witteveen, Naomi van Marm-Wattimena, Han G van der Heide, Leo M Schouls
Since 2007, livestock-associated meticillin-resistant Staphylococcus aureus (LA-MRSA) has become the predominant MRSA clade isolated from humans in the Netherlands. To assess possible temporal changes, we molecularly characterised over 9,000 LA-MRSA isolates submitted from 2003 to 2014 to the Dutch MRSA surveillance. After an initial rapid increase with a peak in 2009 (n = 1,368), the total number of submitted LA-MRSA isolates has been slowly decreasing to 968 in 2014 and over 80% of LA-MRSA belonged to one of three predominant MLVA/spa-types...
May 26, 2016: Euro Surveillance: Bulletin Européen sur les Maladies Transmissibles, European Communicable Disease Bulletin
Sonja M K Schoenfelder, Ying Dong, Andrea T Feßler, Stefan Schwarz, Christoph Schoen, Robin Köck, Wilma Ziebuhr
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) have globally emerged in animal husbandry. In addition to methicillin resistance, LA-MRSA may carry a variety of novel and uncommon antimicrobial resistance genes. Occurrence of the same resistance genes in coagulase-negative staphylococci (CoNS) and S. aureus suggests an ongoing genetic exchange between LA-MRSA and other staphylococci whose driving forces in the ecological niche of the farm environment are, however, still poorly understood...
April 30, 2016: Veterinary Microbiology
Jesper Larsen, Julie Clasen, Julie E Hansen, Wilhelm Paulander, Andreas Petersen, Anders R Larsen, Dorte Frees
The tetracycline resistance gene tet(K) was shown to be integrated within the predominant staphylococcal cassette chromosome mec (SCCmec) element of Danish livestock-associated methicillin-resistant Staphylococcus aureus CC398 (LA-MRSA CC398). These LA-MRSA CC398 isolates already possessed tet(M), but the acquisition of tet(K) significantly improved their fitness at sublethal concentrations of tetracycline. Because tet(K) is genetically linked to SCCmec, the use of tetracycline in food animals may have contributed to the successful spread of LA-MRSA CC398...
July 2016: Antimicrobial Agents and Chemotherapy
Thijs Bosch, Sandra Witteveen, Anja Haenen, Fabian Landman, Leo M Schouls
UNLABELLED: Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) was detected in 2003 and rapidly became the predominant MRSA clade in the Netherlands. Studies have shown that transmissions are difficult to identify, since this MRSA variant represents a genetically homogenous clade when current typing techniques are used. Here, next-generation sequencing was performed on 206 LA-MRSA isolates to assess the capability of LA-MRSA to be transmitted between humans. The usefulness of single nucleotide variants (SNVs), the composition of the SCCmec region, and the presence of plasmids to identify transmission of LA-MRSA were assessed...
July 15, 2016: Applied and Environmental Microbiology
Xiaohua Ye, Xiaolin Wang, Yanping Fan, Yang Peng, Ling Li, Shunming Li, Jingya Huang, Zhenjiang Yao, Sidong Chen
UNLABELLED: Use of antimicrobials in industrial food animal production is associated with the presence of multidrug-resistant Staphylococcus aureus among animals and humans. The livestock-associated (LA) methicillin-resistant S. aureus (MRSA) clonal complex 9 (CC9) is associated with animals and related workers in Asia. This study aimed to explore the genotypic and phenotypic markers of LA-MRSA CC9 in humans. We conducted a cross-sectional study of livestock workers and controls in Guangdong, China...
July 1, 2016: Applied and Environmental Microbiology
G Caggiano, A Dambrosio, F Ioanna, S Balbino, G Barbuti, O De Giglio, G Diella, G Lovero, S Rutigliano, G Scarafile, A Baldassarre, L Vimercati, M Musti, M T Montagna
BACKGROUND: Methicillin-resistant S. aureus (MRSA) is a pathogen spread not only in the hospital environment but also in the community and amongst livestock (LA-MRSA). LA-MRSA can be transmitted to humans that live in close contact with MRSA-colonized animals, and human colonization and/or infection has been reported worldwide, particularly among those involved with livestock farming. In this study the authors evaluated the prevalence of S. aureus and MRSA among healthy carriers who worked in the food industry in Apulia, Southern Italy...
January 2016: Annali di Igiene: Medicina Preventiva e di Comunità
Annamari Heikinheimo, Sophia Johler, Laura Karvonen, Jérôme Julmi, Maria Fredriksson-Ahomaa, Roger Stephan
BACKGROUND: The emergence of livestock-associated MRSA has become a growing public health concern worldwide. Studies elucidating the population structure, as well as resistance phenotypes and virulence gene profiles of livestock-associated MRSA strains are needed to improve risk assessment and to develop effective control measures. The objective of this study therefore was to determine i) clonal complexes and spa types, as well as ii) resistance phenotypes and iii) virulence and resistance gene profiles of livestock-associated MRSA isolated from Finnish fattening pigs at slaughter...
2016: Antimicrobial Resistance and Infection Control
Philipp Jung, Mohamed M H Abdelbary, Britta Kraushaar, Alexandra Fetsch, Jürgen Geisel, Mathias Herrmann, Wolfgang Witte, Christiane Cuny, Markus Bischoff
Livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) isolates of clonal complex 398 (CC398) are frequently found in Europe, and recent studies highlighted the importance of mobile genetic element (MGE) exchange for host adaptation of this lineage. Of note, one of the MGEs commonly found in human S. aureus isolates, the immune evasion cluster (IEC) harboring bacteriophage Saint3, is very rarely found in LA-MRSA CC398 isolates obtained from farm animals, but more frequently found in LA-MRSA CC398 that were retransmitted to humans...
February 23, 2016: Veterinary Microbiology
S van Alen, B Ballhausen, G Peters, A W Friedrich, A Mellmann, R Köck, K Becker
Ten years after initial publications on livestock-associated methicillin-resistant Staphylococcus aureus (LA-MRSA) in 2005, we report on the course of the LA-MRSA CC398 epidemic among patients of the University Hospital Münster. This tertiary care facility is located in the Dutch-German border region (EUREGIO), which is characterized by a high density of livestock production and is hence a hotspot for the occurrence of LA-MRSA CC398. Taking advantage of the unique opportunity to track the emergence and spread of MRSA CC398 among humans from the very beginning of the epidemic until today, a total of 6555 non-duplicate MRSA isolates from all screenings and clinical specimens cultivated within the period from 2000 to 2014 were included in the analysis...
February 1, 2016: Veterinary Microbiology
C Locatelli, P Cremonesi, L Bertocchi, M G Zanoni, A Barberio, I Drigo, G Varisco, B Castiglioni, V Bronzo, P Moroni
The methicillin-resistant Staphylococcus aureus (MRSA) has recently frequently been reported in dairy cattle, usually with low prevalence. The livestock-associated MRSA (LA-MRSA) ST398 is especially involved in cases of subclinical and clinical mastitis. Swine carry LA-MRSA without clinical symptoms and are considered its reservoir and shedder. People exposed to swine are particularly at risk of LA-MRSA colonization. Environments with relevant livestock density are a demonstrated risk factor for humans to be carriers of a LA-MRSA...
March 2016: Journal of Dairy Science
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