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https://www.readbyqxmd.com/read/28731664/-severe-infection-by-methicillin-sensitive-staphylococcus-aureus-producing-panton-valentine-leukocidin-reports-of-two-cases
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
https://www.readbyqxmd.com/read/28640870/dominance-of-community-associated-methicillin-resistant-staphylococcus-aureus-clones-in-a-maternity-hospital
#11
Edet E Udo, Noura Al-Sweih
BACKGROUND: Methicillin- resistant Staphylococcus aureus (MRSA) is a major pathogen causing healthcare- and community- acquired infections. The purpose of this study was to characterize MRSA isolated at the Maternity Hospital between 2006 and 2011 for their genetic relatedness. MATERIALS AND METHODS: The MRSA isolates were investigated using a combination of antibiogram, Staphylococcal chromosome cassette mec (SCCmec) and spa typing to determine their relatedness to MRSA isolated in other Kuwait hospitals...
2017: PloS One
https://www.readbyqxmd.com/read/28640000/panton-valentine-leukocidin-producing-staphylococcus-aureus-facial-pyomyositis-causing-partial-cavernous-sinus-thrombosis
#12
Katherine Green, Ioanna Chranioti, Saurabh Singh, Hans Rolf Jäger, Anje Drebes, Susie Gabbie, Jonathan Cohen
We present a case of sub-total cavernous sinus thrombosis secondary to Panton-Valentine leucocidin-associated Staphylococcus aureus pyomyositis of the muscles of mastication in a previously healthy child, who was successfully managed with no residual disease. He was found to have a factor V Leiden heterozygous mutation. We highlight the propensity of PVL-SA to induce venous thrombosis at any site, but with potential for more severe consequences in the head. We highlight pyomyositis as a differential for peri-orbital cellulitis, and discuss the significance of the factor V Leiden mutation...
June 20, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28639163/agr-functionality-affects-clinical-outcomes-in-patients-with-persistent-methicillin-resistant-staphylococcus-aureus-bacteraemia
#13
C K Kang, Y K Kim, S-I Jung, W B Park, K-H Song, K-H Park, P G Choe, H-C Jang, S Lee, Y-S Kim, Y G Kwak, K T Kwon, S Kiem, C-J Kim, E S Kim, H B Kim
Methicillin-resistant Staphylococcus aureus bacteremia (MRSAB) often persists despite appropriate antibiotic therapy. It is unclear what microbiological factors contribute to poor clinical outcomes in persistent MRSAB (pMRSAB). We aimed to identify clinical and microbiological risk factors for in-hospital mortality in pMRSAB. We analysed MRSAB cases prospectively collected between 2009 and 2016 at 11 hospitals in Korea, defining cases of pMRSAB as MRSAB lasting ≥5 days despite administration of effective antibiotics...
June 21, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28610560/prevalence-and-molecular-characteristics-of-staphylococcus-aureus-including-methicillin-resistant-strains-isolated-from-bulk-can-milk-and-raw-milk-products-in-pastoral-communities-of-south-west-uganda
#14
Benon B Asiimwe, Rossella Baldan, Alberto Trovato, Daniela M Cirillo
BACKGROUND: Staphylococcus aureus strains are now regarded as zoonotic agents. In pastoral settings where human-animal interaction is intimate, multi-drug resistant microorganisms have become an emerging zoonotic issue of public health concern. The study of S. aureus prevalence, antimicrobial resistance and clonal lineages in humans, animals and food in African settings has great relevance, taking into consideration the high diversity of ethnicities, cultures and food habits that determine the lifestyle of the people...
June 13, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28607765/paediatric-bone-and-joint-infection
#15
REVIEW
Alexios D Iliadis, Manoj Ramachandran
Despite advances in understanding and management, paediatric osteoarticular infections continue to pose diagnostic difficulties for clinicians. Delays in diagnosis can lead to potentially devastating morbidity.No single investigation, including joint aspiration, is sufficiently reliable to diagnose conclusively paediatric bone and joint infection. Diagnosis should be based on a combination of clinical signs, imaging and laboratory investigations. Algorithms should supplement, and not replace, clinical decision making in all cases...
January 2017: EFORT open reviews
https://www.readbyqxmd.com/read/28600770/real-time-pcr-to-identify-staphylococci-and-assay-for-virulence-from-blood
#16
Charles E Okolie
The genus Staphylococcus includes pathogenic and non-pathogenic facultative anaerobes. Due to the plethora of virulence factors encoded in its genome, the species Staphylococcus aureus is known to be the most pathogenic. S. aureus strains harboring genes encoding virulence and antibiotic resistance are of public health importance. In clinical samples, however, pathogenic S. aureus is often mixed with putatively less pathogenic coagulase-negative staphylococci (CoNS), both of which can harbor mecA, the genetic driver for staphylococcal methicillin-resistance...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28592231/high-burden-of-complicated-skin-and-soft-tissue-infections-in-the-indigenous-population-of-central-australia-due-to-dominant-panton-valentine-leucocidin-clones-st93-mrsa-and-cc121-mssa
#17
Susan A J Harch, Eleanor MacMorran, Steven Y C Tong, Deborah C Holt, Judith Wilson, Eugene Athan, Saliya Hewagama
BACKGROUND: Superficial skin and soft tissue infections (SSTIs) are common among the Indigenous population of the desert regions of Central Australia. However, the overall burden of disease and molecular epidemiology of Staphylococcus aureus complicated SSTIs has yet to be described in this unique population. METHODS: Alice Springs Hospital (ASH) admission data was interrogated to establish the population incidence of SSTIs. A prospective observational study was conducted on a subset of S...
June 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28590235/chlorhexidine-whole-body-washing-of-patients-reduces-methicillin-resistant-staphylococcus-aureus-and-has-a-direct-effect-on-the-distribution-of-the-st5-mrsa-ii-new-york-japan-clone
#18
Maria Elena Velázquez-Meza, Soraya Mendoza-Olazarán, Gabriela Echániz-Aviles, Adrián Camacho-Ortiz, Michel Fernando Martínez-Reséndez, Vanessa Valero-Moreno, Elvira Garza-González
PURPOSE: Methicillin-resistant Staphylococcus aureus (MRSA) colonizes the skin of hospitalized patients and is associated with high morbidity and mortality. To prevent colonization and infection by S. aureus, better disinfection practices are required. Therefore, we evaluated the effect of chlorhexidine whole-body washing on hospital-acquired S. aureus infections among intensive care unit (ICU) patients in a tertiary hospital in Mexico. METHODOLOGY: The study was conducted over 18 months to evaluate the effect of 2 % chlorhexidine gluconate (CXG) whole-body washing of ICU adult patients on chlorhexidine and antibiotic resistance, biofilm production and clonal distribution of S...
June 8, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28589102/heterogeneous-family-of-cyclomodulins-smart-weapons-that-allow-bacteria-to-hijack-the-eukaryotic-cell-cycle-and-promote-infections
#19
REVIEW
Rachid A El-Aouar Filho, Aurélie Nicolas, Thiago L De Paula Castro, Martine Deplanche, Vasco A De Carvalho Azevedo, Pierre L Goossens, Frédéric Taieb, Gerard Lina, Yves Le Loir, Nadia Berkova
Some bacterial pathogens modulate signaling pathways of eukaryotic cells in order to subvert the host response for their own benefit, leading to successful colonization and invasion. Pathogenic bacteria produce multiple compounds that generate favorable conditions to their survival and growth during infection in eukaryotic hosts. Many bacterial toxins can alter the cell cycle progression of host cells, impairing essential cellular functions and impeding host cell division. This review summarizes current knowledge regarding cyclomodulins, a heterogeneous family of bacterial effectors that induce eukaryotic cell cycle alterations...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28587312/molecular-typing-of-staphylococcus-aureus-isolated-from-patients-with-autosomal-dominant-hyper-ige-syndrome
#20
Inka Sastalla, Kelli W Williams, Erik D Anderson, Ian A Myles, Jensen D Reckhow, Marlene Espinoza-Moraga, Alexandra F Freeman, Sandip K Datta
Autosomal dominant hyper IgE syndrome (AD-HIES) is a primary immunodeficiency caused by a loss-of-function mutation in the Signal Transducer and Activator of Transcription 3 (STAT3). This immune disorder is clinically characterized by increased susceptibility to cutaneous and sinopulmonary infections, in particular with Candida and Staphylococcus aureus. It has recently been recognized that the skin microbiome of patients with AD-HIES is altered with an overrepresentation of certain Gram-negative bacteria and Gram-positive staphylococci...
June 6, 2017: Pathogens
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