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Coagulase-negative staphylococci

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https://www.readbyqxmd.com/read/28731901/should-first-line-empiric-treatment-strategies-for-neonates-cover-coagulase-negative-staphylococcal-infections-in-kenya
#1
Anna C Seale, Christina W Obiero, Kelsey Jones, Hellen C Barsosio, Johnstone Thitiri, Moses Ngari, Susan Morpeth, Shebe Mohammed, Greg Fegan, Neema Mturi, James A Berkley
BACKGROUND: Neonatal mortality remains high in sub-Saharan Africa, and a third of deaths are estimated to result from infection. Whilst coagulase negative staphylococci (CoNS) are leading neonatal pathogens in resource-rich settings, their role, and the need for early anti-staphylococcal treatment in empiric antibiotic guidelines, is unknown in sub-Saharan Africa. METHODS: We examined systematic clinical and microbiologic surveillance data from all neonatal admissions to Kilifi County Hospital (1998-2013) to determine associated case fatality and/or prolonged duration of admission associated with CoNS in neonates treated according to standard WHO guidelines...
July 18, 2017: Pediatric Infectious Disease Journal
https://www.readbyqxmd.com/read/28727951/in-vitro-activity-of-telavancin-against-clinically-important-gram-positive-pathogens-from-69-u-s-medical-centers-2015-potency-analysis-by-u-s-census-divisions
#2
Michael A Pfaller, Helio S Sader, Robert K Flamm, Mariana Castanheira, Jennifer I Smart, Rodrigo E Mendes
A total of 8,072 gram-positive isolates collected from 69 medical centers among all 9 U.S. Census Divisions during the 2015 SENTRY Antimicrobial Surveillance Program were included. Telavancin had minimal inhibitory concentration (MIC)50 and MIC90 values of 0.03/0.06 μg/mL, respectively, against methicillin-susceptible (MSSA) and methicillin-resistant Staphylococcus aureus (MRSA). Similar activity was also observed among coagulase-negative staphylococci (MIC50/90, 0.03/0.06 μg/ml; 100.0% inhibited by ≤0...
July 20, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28727741/antimicrobial-resistance-rates-in-gram-positive-bacteria-do-not-drive-glycopeptides-use
#3
Beryl Primrose Gladstone, Andrea Cona, Parichehr Shamsrizi, Tuba Vilken, Winfred V Kern, Nisar Malek, Evelina Tacconelli
Surveillance data are considered essential to appropriate empiric antibiotic therapy and stewardship. The objective of this study was to determine if a change in the rates of antibiotic resistance impacts antibiotic use in European hospitals. Glycopeptides use was selected to study the correlation between resistance rates and antibiotic use because of the restricted spectrum against resistant gram positive bacteria. PubMed, ECDC databases and national/regional surveillance systems were searched to identify glycopeptides´ consumption in defined daily dose per 1000 inhabitant-days (DID) and rate of methicillin-resistant Staphylococcus aureus (MRSA), methicillin-resistant coagulase negative staphylococci (MRCoNS), and vancomycin-resistant enterococci (VRE) in bloodstream infections (BSIs) in European countries between 1997 and 2015...
2017: PloS One
https://www.readbyqxmd.com/read/28721078/incomplete-recovery-of-the-fecal-flora-of-hematological-patients-with-neutropenia-and-repeated-fluoroquinolone-prophylaxis
#4
Yong Chong, Shinji Shimoda, Noriko Miyake, Takatoshi Aoki, Yoshikiyo Ito, Tomohiko Kamimura, Nobuyuki Shimono
BACKGROUND: Routine fluoroquinolone prophylaxis in neutropenic patients with hematological malignancies is still controversial, because of antibiotic resistance concerns. The recovery of the fecal microbiota to the initial composition in patients receiving multiple courses of quinolone prophylaxis and repeated chemotherapy has not been evaluated. METHODS: We prospectively examined the changes in the fecal bacterial composition before and after levofloxacin prophylaxis...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28717325/tetracycline-resistance-phenotypes-and-genotypes-of-coagulase-negative-staphylococcal-isolates-from-bubaline-mastitis-in-egypt
#5
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/28704470/mammary-candidiasis-a-medical-condition-without-scientific-evidence
#6
Esther Jiménez, Rebeca Arroyo, Nivia Cárdenas, María Marín, Pilar Serrano, Leonides Fernández, Juan M Rodríguez
Many physicians, midwives and lactation consultants still believe that yeasts (particularly Candida spp.) play an important role as an agent of nipple and breast pain despite the absolute absence of scientific proofs to establish such association. In this context, the objective of this study was to investigate the microorganisms involved in sore nipples and/or painful "shooting" breastfeeding by using a variety of microscopy techniques, as well as culture-dependent and-independent identification methods. Initially, 60 women (30 diagnosed as suffering "mammary candidiasis" and 30 with no painful breastfeeding) were recruited to elucidate the role of their pumps on the milk microbial profiles...
2017: PloS One
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
#7
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/28698997/zinc-oxide-curcumin-nanocomposite-loaded-collagen-membrane-as-an-effective-material-against-methicillin-resistant-coagulase-negative-staphylococci
#8
K R Soumya, S Snigdha, Sheela Sugathan, Jyothis Mathew, E K Radhakrishnan
Zinc oxide nanoparticles and curcumin are excellent antimicrobial agents. They have the potential to be used as alternative to antibiotics in wound infection management. In this study, ZnO-curcumin nanocomposite was synthesized and characterized. Physical adsorption of the nanocomposite onto collagen skin wound dressing was conducted and structural investigation was carried out by SEM. Antimicrobial assay, minimum inhibitory concentration (MIC), and viability assays of different concentrations of nanocomposite loaded collagen membrane were conducted against clinically isolated methicillin-resistant coagulase-negative Staphylococci (MRCoNS), such as S...
August 2017: 3 Biotech
https://www.readbyqxmd.com/read/28694609/role-of-biofilm-in-cerebrospinal-fluid-shunt-infections-a-study-at-tertiary-neurocare-center-from-south-india
#9
Kirtilaxmi K Benachinmardi, R Ravikumar, B Indiradevi
INTRODUCTION: Biofilms are the source of persistent infections of many pathogenic microbes. They are responsible for nosocomial infection and also associated with many surgical conditions including indwelling medical devices such as ventriculoperitoneal shunt. A significant problem encountered in shunt procedures is obstruction followed by infection, with infection rate ranging from 2% to 27%, often with poor outcome. MATERIALS AND METHODS: This study was conducted in the Department of Neuromicrobiology at a tertiary neuroinstitute for 6 months from July 1 to December 31, 2014...
July 2017: Journal of Neurosciences in Rural Practice
https://www.readbyqxmd.com/read/28691647/microbiological-diagnosis-in-revision-of-infected-knee-arthroplasties-in-denmark
#10
Martin Lindberg-Larsen, Frederik T Pitter, Marianne Voldstedlund, Henrik M Schrøder, Jens Bagger
BACKGROUND: Revision of infected knee arthroplasties is associated with high failure rates (30-40%). An understanding of the microbiology is important to optimize treatment and outcome. We describe microbiological diagnostic practice and diagnosis in revision of infected knee arthroplasties. METHODS: One hundred and two partial revisions (open debridement and exchange of tibial insert) and 213 two-stage procedures performed due to infection in 275 patients from 1 July 2011 to 30 June 2013 were included and analysed by linkage to data from a nationwide registry on microbiological test results...
July 8, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28689228/impact-of-a-rapid-molecular-test-for-positive-blood-cultures-from-neonatal-intensive-care-patients-on-clinical-management-a-retrospective-audit
#11
L L Koh, S O'Rourke, M Brennan, L Clooney, M Cafferkey, N McCallion, R J Drew
BACKGROUND: Both Staphylococcus aureus and coagulase negative Staphylococci are common causes of late-onset neonatal sepsis in the neonatal intensive care unit (NICU), usually relating to intravascular access device infections. AIMS: This project aimed to review the impact on antimicrobial treatment and clinical outcome in the NICU setting, of the introduction of the Xpert MRSA/SA BC test (Cepheid, USA) for the identification of staphylococci in blood cultures. METHODS: A retrospective audit was carried out of the pre- and post-intervention periods; the intervention was the introduction of the Xpert MRSA/SA BC test...
July 8, 2017: Irish Journal of Medical Science
https://www.readbyqxmd.com/read/28683646/bloodstream-infections-in-acute-myeloid-leukemia-patients-treated-according-to-the-finnish-leukemia-group-aml-2003-protocol-a-prospective-nationwide-study
#12
Aarne Kolonen, Marjatta Sinisalo, Reetta Huttunen, Jaana Syrjänen, Janne Aittoniemi, Heini Huhtala, Marja Sankelo, Hannele Rintala, Riikka Räty, Esa Jantunen, Tapio Nousiainen, Marjaana Säily, Marjut Kauppila, Maija Itälä-Remes, Hanna Ollikainen, Auvo Rauhala, Pirjo Koistinen, Erkki Elonen
BACKGROUND: Infections greatly influence the outcome of acute myeloid leukemia (AML) patients receiving intensive treatment. The aim of this study was to establish the incidence, microbial etiology, risk factors and prognosis of bloodstream infections (BSIs) in patients with AML and compare the results with the previous treatment protocol (AML-92). METHODS: Registery data were gathered prospectively from 357 patients aged 16-65 years recruited on the AML-2003 treatment protocol between November 2003 and November 2011 during different treatment cycles...
July 6, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28681820/changing-epidemiology-of-coagulase-negative-staphylococci-in-normal-flora-of-skin
#13
Vikas Gautam, Nandini Sethuraman, Ramanpreet Kaur, Suchet Sachdev, Neelam Marwaha, Pallab Ray
Coagulase negative staphylococci (CoNS) have recently emerged as important pathogens causing nosocomial blood stream infections. To evaluate the prevalence of CoNS in cutaneous normal flora, skin swabs were collected from voluntary blood donors and processed for culture and identification using matrix assisted laser desorption ionisation-time of flight (MALDI-TOF). CoNS were isolated from 96% of blood donors, most commonly Staphylococcus hominis (86%), followed by Staphylococcus epidermidis (22%) and Staphylococcus haemolyticus (9%)...
April 2017: Indian Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28665928/the-role-of-breast-milk-in-colonisation-of-neonatal-gut-and-skin-with-coagulase-negative-staphylococci
#14
Hiie Soeorg, Tuuli Metsvaht, Imbi Eelmäe, Mirjam Merila, Sirli Treumuth, Kristi Huik, Marika Jürna-Ellam, Mari-Liis Ilmoja, Irja Lutsar
BACKGROUND: We aimed to determine genetic relatedness between Staphylococcus epidermidis colonising breast milk (BM) and BM-fed neonates during the first month of life. METHODS: S. epidermidis was isolated from stool and skin swabs of 20 healthy term and 49 preterm neonates hospitalised in neonatal intensive care unit and BM of mothers once a week and typed by multilocus variable-number tandem-repeat analysis (MLVA). Virulence-related genes were determined by PCR...
June 30, 2017: Pediatric Research
https://www.readbyqxmd.com/read/28665797/surveillance-of-bacterial-colonisation-on-contact-surfaces-in-different-medical-wards
#15
Karmen Godič Torkar, Sanja Ivić
This study was conducted to determine the bacterial colonization of some bacterial groups, including extended-spectrum β-lactamase (ESBLs) producers and methicillin-resistant Staphylococcus aureus (MRSA), on surfaces of the equipment and instruments in patient rooms and other workspaces in three different medical wards. The number of microorganisms on swabs was determined with the colony count method on selective microbiological mediums. The aerobic mesophylic microorganisms were found in 73.5 % out of 102 samples, with the average and maximum values of 2...
June 27, 2017: Arhiv za Higijenu Rada i Toksikologiju
https://www.readbyqxmd.com/read/28656173/heparin-mimics-extracellular-dna-in-binding-to-cell-surface-localized-proteins-and-promoting-staphylococcus-aureus-biofilm-formation
#16
Surabhi Mishra, Alexander R Horswill
Staphylococcus aureus is a leading cause of catheter-related bloodstream infections. Biofilms form on these implants and are held together by a matrix composed of proteins, polysaccharides, and extracellular DNA (eDNA). Heparin is a sulfated glycosaminoglycan that is routinely used in central venous catheters to prevent thrombosis, but it has been shown to stimulate S. aureus biofilm formation through an unknown mechanism. Data presented here reveal that heparin enhances biofilm capacity in many S. aureus and coagulase-negative staphylococcal strains, and it is incorporated into the USA300 methicillin-resistant S...
May 2017: MSphere
https://www.readbyqxmd.com/read/28655955/comparison-of-efficacy-and-cost-effectiveness-of-0-55-ortho-phthalaldehyde-and-2-glutaraldehyde-for-disinfection-of-laryngoscopes-a-prospective-pilot-study
#17
Priyanka Pradeep Karnik, Nandini Malay Dave, Gita Nataraj, Rajarshi Gupta, Madhu Garasia
BACKGROUND AND AIMS: The laryngoscope is a potential source of cross-infection as it involves contact with the mucous membrane, saliva and occasionally blood. This study compared efficacy and cost-effectiveness of two Centre for Disease Control approved agents for disinfection of laryngoscope blades. METHODS: One hundred and sixty patients requiring laryngoscopy and intubation for general anaesthesia were randomly allocated into two groups. After tracheal intubation, used laryngoscope blades were cleaned with tap water...
June 2017: Indian Journal of Anaesthesia
https://www.readbyqxmd.com/read/28653472/residual-risk-of-bacterial-contamination-of-platelets-six-years-of-experience-with-sterility-testing
#18
Sandra Ramirez-Arcos, Caesar DiFranco, Terri McIntyre, Mindy Goldman
BACKGROUND: Canadian Blood Services screens 100% of platelet concentrates (PCs) for bacterial contamination with the BacT/ALERT system. Quality-control sterility testing of 1% (≥10 units) of outdated PCs is performed monthly. Data from routine screening, quality-control testing, and septic reactions obtained from 2010 to 2016 are presented herein. STUDY DESIGN AND METHODS: In total, 601,988 buffy coat PC pools and 186,737 apheresis PCs were routinely screened with aerobic cultures over 6 years...
June 26, 2017: Transfusion
https://www.readbyqxmd.com/read/28652785/prevalence-and-antibiotic-resistance-of-coagulase-negative-staphylococci-isolated-from-poultry-farms-in-three-regions-of-ghana
#19
Vivian Etsiapa Boamah, Christian Agyare, Hayford Odoi, Francis Adu, Stephen Yao Gbedema, Anders Dalsgaard
The use of antibiotics in animal production has been associated with the development and spread of antibiotic-resistant organisms including commensals. Coagulase-negative Staphylococcus (CoNS) species, which were until recently considered non-pathogenic, have been associated with opportunistic infections and high resistance to several antibiotics. This study sought to determine the prevalence, identity, and phenotypic resistance of coagulase-negative Staphylococcus spp. isolated from some selected poultry farms and farm workers in the Ashanti, Brong Ahafo, and Greater Accra regions of Ghana...
2017: Infection and Drug Resistance
https://www.readbyqxmd.com/read/28652437/increased-resistance-of-skin-flora-to-antimicrobial-prophylaxis-in-patients-undergoing-hip-revision-arthroplasty
#20
Heinrich M L Mühlhofer, Lukas Deiss, Philipp Mayer-Kuckuk, Florian Pohlig, Norbert Harrasser, Ulrich Lenze, Hans Gollwitzer, Christian Suren, Peter Prodinger, Rüdiger VON Eisenhart-Rothe, Johannes Schauwecker
BACKGROUND/AIM: Prosthetic joint infection (PJI) remains a major complication after total joint replacement and is the primary indication for revision arthroplasty. Specifically, coagulase-negative Staphylococci (CNS) can cause low-grade infections. Despite the use of cephalosporin-based antimicrobial prophylaxis (AMP) and antiseptic treatment at the surgical site, evidence suggests that a significant number of cases of dermal CNS results in low-grade PJI. Thus, this study examined the bacterial colonization and resistance patterns at the surgical site...
July 2017: In Vivo
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