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https://www.readbyqxmd.com/read/28816638/high-prevalence-of-multidrug-resistant-community-acquired-methicillin-resistant-staphylococcus-aureus-at-the-largest-veterinary-teaching-hospital-in-costa-rica
#1
Irene Rojas, Elías Barquero-Calvo, Joany C van Balen, Norman Rojas, Lohendy Muñoz-Vargas, Armando E Hoet
Methicillin-resistant Staphylococcus aureus (MRSA) is a pathogen associated with severe infections in companion animals present in the community, and it is diagnosed in animals admitted to veterinary hospitals. However, reports that describe the circulation of MRSA in animal populations and veterinary settings in Latin America are scarce. Therefore, the objective of this study was to determine the prevalence and investigate the molecular epidemiology of MRSA in the environment of the largest veterinary teaching hospital in Costa Rica...
August 17, 2017: Vector Borne and Zoonotic Diseases
https://www.readbyqxmd.com/read/28815486/staphylococcus-aureus-carriage-in-french-athletes-at-risk-of-ca-mrsa-infection-a-prospective-cross-sectional-study
#2
E Couvé-Deacon, D Postil, O Barraud, C Duchiron, D Chainier, A Labrunie, N Pestourie, P M Preux, B François, M C Ploy
BACKGROUND: Staphylococcus aureus (SA) is a leading cause of infectious diseases in sports teams. In recent decades, community-associated SA (CA-SA) strains have emerged worldwide and have been responsible for outbreaks in sports teams. There are very few data on the prevalence of these strains in France, and none on the carriage among athletes. METHODS: We conducted a cross-sectional study to determine the SA carriage proportion among athletes practicing sports at risk for CA-SA infection in a French county, and determined the methicillin-resistant and/or CA-SA proportion...
August 16, 2017: Sports Medicine—Open
https://www.readbyqxmd.com/read/28783418/diagnosis-and-management-of-panton-valentine-leukocidin-toxin-associated-staphylococcus-aureus-infection-an-update
#3
Yamuna Devi Bakthavatchalam, Laura E B Nabarro, Ravikar Ralph, Balaji Veeraraghavan
The incidence of invasive Staphylococcus aureus (SA) infection has increased in the past decade and is associated with poor outcomes and high mortality rates. Of all the virulence factors, Panton-Valentine Leukocidin (PVL) has received the greatest attention. PVL producing SA strains are more likely to produce severe skin and soft tissue infections (SSTIs) and necrotizing pneumonia. This review focuses on the current evidence on PVL-SA virulence, epidemiology, clinical disease and treatment with relevance to healthcare in India...
August 7, 2017: Virulence
https://www.readbyqxmd.com/read/28780098/prevalence-and-characterization-of-methicillin-resistant-staphylococcus-aureus-carrying-meca-or-mecc-and-methicillin-susceptible-staphylococcus-aureus-in-dairy-sheep-farms-in-central-italy
#4
G Giacinti, V Carfora, A Caprioli, D Sagrafoli, N Marri, G Giangolini, R Amoruso, M Iurescia, F Stravino, S Dottarelli, F Feltrin, A Franco, S Amatiste, A Battisti
Between January and May 2012, a total of 286 bulk tank milk samples from dairy sheep farms located in central Italy were tested for the presence of Staphylococcus aureus. One hundred fifty-three samples were positive for S. aureus (53.5%), with an average count of 2.53 log cfu/mL. A total of 679 S. aureus colonies were screened for methicillin resistance by the cefoxitin disk diffusion test, and 104 selected cefoxitin-susceptible isolates were also tested for their susceptibility to other antimicrobials representative of the most relevant classes active against Staphylococcus spp...
August 2, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28777321/prevalence-and-genetic-characteristics-of-staphylococcus-aureus-and-staphylococcus-argenteus-isolates-harboring-panton-valentine-leukocidin-enterotoxins-and-tsst-1-genes-from-food-handlers-in-myanmar
#5
Meiji Soe Aung, Thida San, Mya Mya Aye, San Mya, Win Win Maw, Khin Nyein Zan, Wut Hmone Win Htut, Mitsuyo Kawaguchiya, Noriko Urushibara, Nobumichi Kobayashi
Asymptomatic carriers of toxigenic Staphylococcus aureus are potential source of diseases, including food poisoning. Toxigenic potential and genetic traits of colonizing S. aureus were investigated for 563 healthy food handlers in Myanmar. Carriage of S. aureus was found in 110 individuals (19.5%), and a total of 144 S. aureus isolates were recovered from nasal cavities (110 isolates) and hands (34 isolates). Panton-Valentine leucocidin genes (pvl) were detected in 18 isolates (12.5%), among which 11 isolates were classified into coa-VIa, agr type III, and ST1930 (CC96) that had been also detected in pvl-positive clinical isolates in Myanmar...
August 4, 2017: Toxins
https://www.readbyqxmd.com/read/28776100/dalbavancin-for-outpatient-parenteral-antimicrobial-therapy-of-skin-and-soft-tissue-infections-in-a%C3%A2-returning-traveller-proposal-for-novel-treatment-indications
#6
Johannes Mischlinger, Heimo Lagler, Nicole Harrison, Michael Ramharter
Skin and soft tissue infections (SSTIs) are among the most common health problems in travellers returning from tropical and subtropical countries. Importantly, the prevalence of Staphylococcus aureus, the most common pathogen for purulent SSTIs, with specific drug resistance, such as methicillin resistant Staphylococcus aureus (MRSA) and those expressing virulence genes, such as Panton-Valentine-leukocidin is higher in tropical regions than in most high resource settings. This poses challenges for the empirical antimicrobial treatment of SSTIs in returning travellers...
August 3, 2017: Wiener Klinische Wochenschrift
https://www.readbyqxmd.com/read/28736966/molecular-characterization-of-nasal-methicillin-resistant-staphylococcus-aureus-isolates-from-workers-of-an-automaker-company-in-southeast-iran
#7
Mohammad Hossein Sobhanipoor, Roya Ahmadrajabi, Afsaneh Karmostaji, Fereshteh Saffari
Colonization of methicillin resistant Staphylococccus aureus (MRSA) can occur more commonly in healthy people who live in close together or are in close physical contact with each other. Having knowledge about the molecular characteristics of these strains provides considerable discernment into the epidemiology of this important microorganism. A total of 806 nasal swabs were collected from healthy workers of an automaker company in the southeast of Iran and were analyzed to detect MRSA isolates. Multilocus sequence typing (MLST), spa typing, and detection of staphylococcal cassette chromosome mec (SCCmec) were performed...
July 24, 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/28736358/-emergence-of-methicillin-resistant-staphylococcus-aureus-sccmec-type-iv-v-epidemic-clones-in-a-large-teaching-hospital-in-china
#8
Yi-Ming Zhong, Rui Yuan, Jian-Sheng Ding, Fang Yang, Wen-En Liu
OBJECTIVE: To investigate the staphylococcal cassette chromosome mec (SCCmec) genotype and molecular epidemiological characteristics of healthcare-associated methicillin-resistant Staphylococcus aureus (HA-MRSA) in a large teaching hospital in China. METHDOS: From January 2012 to December 2012, a total of 71 nonduplicate HA-MRSA were collected in a teaching hospital in Changsha, China. SCCmec types were determined by multiplex PCR, and Panton-Valentine leukocidin (PVL) gene was detected by PCR...
July 20, 2017: Nan Fang Yi Ke da Xue Xue Bao, Journal of Southern Medical University
https://www.readbyqxmd.com/read/28735052/spa-typing-and-identification-of-pvl-genes-of-meticillin-resistant-staphylococcus-aureus-isolated-from-a-libyan-hospital-in-tripoli
#9
Mohamed O Ahmed, Keith E Baptiste, Mohamed A Daw, Asma K Elramalli, Yousef M Abouzeed, Andreas Petersen
OBJECTIVES: The purpose of the study was to investigate the molecular characteristics of meticillin-resistant Staphylococcus aureus (MRSA) isolated from clinical sources in Tripoli, Libya. METHODS: A total of 95 MRSA strains collected at the Tripoli medical Centre were investigated by spa typing and identification of the Panton-Valentine Leukocidin (pvl) genes. RESULTS: A total of 26 spa types were characterized and distributed among nine clonal complexes; CC5 (n=32), CC80 (n=18), CC8 (n=17) and CC22 (n=12) were the most prevalent clonal complexes...
July 19, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28734577/characterization-of-a-pvl-negative-community-acquired-methicillin-resistant-staphylococcus-aureus-strain-of-sequence-type-88-in-china
#10
Lu Sun, Dandan Wu, Yan Chen, Qian Wang, Haiping Wang, Yunsong Yu
Sequence type 88 community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) strain SR434, isolated from an outpatient with skin and soft tissue infection, was subjected to whole genome sequencing, antimicrobial susceptibility testing, mouse skin infection model and hemolysis analysis to identify its virulence and resistance determinants. MRSA strain SR434 is resistant to clindamycin, erythromycin and fosfomycin. Four plasmids with resistance genes were identified in this strain, including a 20,658bp blaZ-carrying plasmid, a 2473bp ermC-carrying plasmid, a 2622bp fosB7-carrying plasmid (86% identity with plasmid in a ST2590 MRSA strain) and a 4817bp lnuA-carrying plasmid (99% identity with pLNU4 from bovine coagulase-nagetive Staphylococci)...
July 13, 2017: International Journal of Medical Microbiology: IJMM
https://www.readbyqxmd.com/read/28731664/-severe-infection-by-methicillin-sensitive-staphylococcus-aureus-producing-panton-valentine-leukocidin-reports-of-two-cases
#11
Martín Brizuela, Guadalupe Pérez, Silvina Ruvinsky, Claudia Sarkis, Romina Romero, Alejandra Mastroianni, Lidia Casimir, María E Venuta, Verónica Gómez Bonduele, Rosa Bologna
Staphylococcus aureus is a major etiologic agent of infections in children from the community and the hospital setting. The severity of these conditions is associated with virulence factors, including the Panton-Valentine leukocidin. Both methicillin resistant and sensitive Staphylococcus aureus produce this leukocidin although with varying frequency. We present two children with severe infection by sensitive Staphylococcus aureus producer of Panton-Valentine leukocidin with musculoskeletal and endovascular complications...
August 1, 2017: Archivos Argentinos de Pediatría
https://www.readbyqxmd.com/read/28729204/characterization-of-clinical-isolates-oxacillin-susceptible-meca-positive-staphylococcus-aureus-os-mrsa-in-china-from-2009-2014
#12
Yunjia Song, Lanqing Cui, Yuan Lv, Yun Li, Feng Xue
OBJECTIVE: The study aimed to investigate the prevalence and molecular characteristics of clinical oxacillin-susceptible mecA-positive Staphylococcus aureus (OS-MRSA) isolates in China from July 2009 to June 2014. METHODS: A total of 2,068 non-duplicated Staphylococcus aureus isolates were collected from 21 hospitals and the susceptibility test were performed by agar dilution method. All the OS-MRSA strains were screened for the presence of the mecA, mecC and nuc gene as well as Panton-Valentine leucocidin gene(PVL)...
July 17, 2017: Journal of Global Antimicrobial Resistance
https://www.readbyqxmd.com/read/28722566/molecular-epidemiology-of-staphylococcus-aureus-skin-and-soft-tissue-infections-in-the-lao-people-s-democratic-republic
#13
Alicia D Yeap, Kate Woods, David A B Dance, Bruno Pichon, Sayaphet Rattanavong, Viengmon Davong, Rattanaphone Phetsouvanh, Paul N Newton, Nandini Shetty, Angela M Kearns
This is the first report of the molecular epidemiology of Staphylococcus aureus from skin and soft tissue infections (SSTI) in Laos. We selected a random sample of 96 S. aureus SSTI isolates received by the Microbiology Laboratory, Mahosot Hospital, Vientiane, between July 2012 and June 2014, including representation from seven referral hospitals. Isolates underwent susceptibility testing by Clinical and Laboratory Standards Institute methods, spa typing and DNA microarray analysis, with whole genome sequencing for rare lineages...
May 30, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28708463/epidemiological-trends-observed-from-molecular-characterization-of-methicillin-resistant-staphylococcus-aureus-isolates-from-blood-cultures-at-a-japanese-university-hospital-2012-2015
#14
Yuri Miura, Tetsuo Yamaguchi, Itaru Nakamura, Shinobu Koyama, Kiyoko Tamai, Takashi Okanda, Tetsuya Matsumoto
Despite increasing reports of skin and soft tissue infections caused by community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) in Japan, the extent to which these strains cause nosocomial infections remains unknown, and this is especially true for bloodstream infections. In this study, we molecularly characterized MRSA isolates from Japanese blood samples. Among the 151 MRSA isolates collected from 53 medical facilities in 2011, 115 (76%) and 30 (20%) were classified as staphylococcal cassette chromosome mec (SCCmec) types II and IV, respectively, while the Panton-Valentine leukocidin (PVL) gene was detected in only two isolates...
July 14, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28679429/clinical-features-and-molecular-characteristics-of-childhood-community-associated-methicillin-resistant-staphylococcus-aureus-infection-in-a-medical-center-in-northern-taiwan-2012
#15
Hong-Kai Wang, Chun-Yen Huang, Yhu-Chering Huang
BACKGROUND: Since first reported in 2002, the rate of methicillin-resistant Staphylococcus aureus (MRSA) among childhood community-associated (CA) S. aureus infection in Taiwan increased significantly up to 2005. There have been no reports on this issue since then. METHODS: We prospectively collected clinical S. aureus isolates from the patients <19 years of age in a university-affiliated hospital in 2012. Only first isolate from each patient was included. The medical records were retrospectively reviewed and the patients were classified as CA or healthcare-associated (HA) by the standard epidemiologic criteria...
July 5, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28668467/identification-of-a-pvl-negative-sccmec-iva-sub-lineage-of-the-methicillin-resistant-staphylococcus-aureus-cc80-lineage-understanding-the-clonal-origin-of-ca-mrsa
#16
Sofie Marie Edslev, Henrik Torkil Westh, Paal Skytt Andersen, Robert Skov, Nobumichi Kobayashi, Mette Damkjær Bartels, Francois Vandenesh, Andreas Petersen, Peder Worning, Anders Rhod Larsen, Marc Stegger
OBJECTIVES: Community-acquired MRSA (CA-MRSA) isolates belonging to clonal complex 80 (CC80) are recognized as the European CA-MRSA. The prevailing European CA-MRSA clone carries a type IVc staphylococcal cassette chromosome mec (SCCmec) and expresses Panton-Valentine leukocidin (PVL). Recently, a significant increase of PVL-negative CC80 MRSA has been observed in Denmark. The aim of this study was to examine the genetics and the epidemiology of these, and to compare them to the European CA-MRSA clone in order to understand the emergence of PVL-negative CC80 MRSA...
June 28, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28663821/skin-infection-caused-by-a-novel-strain-of-staphylococcus-pseudintermedius-in-a-siberian-husky-dog-owner
#17
Andrew R Robb, Elizabeth D Wright, Adele M E Foster, Robert Walker, Colin Malone
Introduction.Staphylococcus pseudintermedius, an opportunistic pathogen of dogs and cats, is rarely reported to cause infection in humans. Here, we describe a case of severe skin infection caused by S. pseudintermedius, in a 47-year-old male, a dog owner; to the best of our knowledge, this is the first such case reported from Scotland. Case presentation. The patient presented with a short history of a severe ecthyma-like lesion on his forehead, with smaller lesions on his abdomen and legs. Bacterial culture revealed Clostridium perfringens, thought to be colonizing the wound, and a Staphylococcus species, identified as S...
March 2017: JMM Case Reports
https://www.readbyqxmd.com/read/28663800/septic-arthritis-caused-by-an-emerging-st121-methicillin-susceptible-pvl-negative-staphylococcus-aureus-harbouring-a-variant-of-bone-sialoprotein-binding-protein-gene
#18
A Togashi, M S Aung, Y Yoto, T Tsugawa, H Sueoka, M Kawaguchiya, H Tsutsumi, N Kobayashi
ST121/agr-IV methicillin-susceptible Staphylococcus aureus was isolated from a patient of septic arthritis (synovial fluid, blood, skin and nasal cavity). Although the Panton-Valentine leukocidin (PVL) gene was negative, this isolate harboured a gene encoding a variant of bone sialoprotein-binding protein with a shortened SD-repeat region.
September 2017: New Microbes and New Infections
https://www.readbyqxmd.com/read/28655502/genetic-diversity-of-pvl-positive-community-onset-methicillin-resistant-staphylococcus-aureus-isolated-at-a-university-hospital-in-japan
#19
Hidemasa Nakaminami, Ayumu Ito, Daisuke Sakanashi, Hiroyuki Suematsu, Yuka Yamagishi, Hiroshige Mikamo, Norihisa Noguchi
Community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) is pathogenic to healthy individuals and a significant issue throughout the world. Panton-Valentine leukocidin gene (pvl)-positive sequence type (ST) 8-staphylococcal cassette chromosome (SCC) mec type IV (ST8-IV) as represented by the USA300 clone, is the most prevalent CA-MRSA in many countries. However, the prevalence of pvl-positive CA-MRSA was limited in Japan. Here, we report the incidence of pvl-positive community-onset MRSA (CO-MRSA) isolated from 10 patients seen between 2009 and 2014 at a Japanese university hospital...
June 24, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28642157/genome-comparisons-of-two-taiwanese-community-associated-methicillin-resistant-staphylococcus-aureus-st59-clones-support-the-multi-origin-theory-of-ca-mrsa
#20
Ye Feng, Hsiu-Ling Chen, Chih-Jung Chen, Chyi-Liang Chen, Cheng-Hsun Chiu
Sequence type (ST) 59 is an epidemic lineage of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) in Asia. Two ST59 clones are prevalent in Taiwan: the Taiwan clone (TW) causes severe infections, whereas the Asian-Pacific clone (AP) is usually commensal. In this study, we sequenced the genome and transcriptome of the representative strains of these two clones and found their differences to focus on three mobile genetic elements: TW carries SCCmec Type VT, Panton-Valentine leucocidin (PVL)-encoding prophage ΦSa2, whereas AP carries SCCmec Type IV and staphylokinase (SAK)-encoding prophage ΦSa3...
June 19, 2017: Infection, Genetics and Evolution
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