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Coagulase-negative staphylococci

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https://www.readbyqxmd.com/read/28109594/characteristics-of-resistance-and-virulence-factors-in-different-species-of-coagulase-negative-staphylococci-isolated-from-milk-of-healthy-sheep-and-animals-with-subclinical-mastitis
#1
Katheryne B Martins, Patricia Y Faccioli, Mariana F Bonesso, Simone Fernandes, Aline A Oliveira, Ariane Dantas, Luiz F Zafalon, Maria de Lourdes R S Cunha
Coagulase-negative staphylococci (CNS) are among the main responsible agents for mastitis in sheep. Cure rates can be reduced due to several causes, such as those related to virulence factors presented by microorganisms. This study aims at characterizing the virulence and resistance factors to antimicrobial agents in different CNS species isolated from sheep milk. After collecting milk samples, the samples were analyzed and the CNS species were identified. After identification, the susceptibility-sensitivity profile was examined using the disk diffusion technique for 10 antimicrobial agents...
January 18, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/28109554/clinical-and-microbiological-characteristics-of-bloodstream-infections-among-patients-with-haematological-malignancies-with-and-without-neutropenia-at-a-medical-centre-in-northern-taiwan-2008-2013
#2
Chien-Yuan Chen, Feng-Ming Tien, Wang-Huei Sheng, Shang-Yi Huang, Ming Yao, Jih-Luh Tang, Woei Tsay, Hwei-Fang Tien, Po-Ren Hsueh
This study aimed to investigate the epidemiology and microbiology of bloodstream infections (BSIs) in patients with haematological malignancies. Clinical characteristics and microbiology of 2083 patients with haematological malignancy who were treated for BSI from 2008 to 2013 at a medical centre in Taiwan were retrospectively reviewed. Lymphoma (38.1%) was the most common, followed by acute myeloid leukaemia (30.9%). Of the 2090 non-duplicate BSI isolates, 1310 (62.7%) were recovered from patients with neutropenia...
January 3, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28092613/effects-of-udder-infections-with-staphylococcus-xylosus-and-staphylococcus-warneri-on-the-composition-and-physicochemical-changes-in-cows-milk
#3
M Vasil, E Pecka-Kiełb, J Elečko, A Zachwieja, W Zawadzki, F Zigo, J Illek, Z Farkašová
The aim of this study was an evaluation of the effects of two species of coagulase negative staphylococci (CNS), Staphylococcus xylosus and Staphylococcus warneri, on the changes in technological parameters of cows' milk. The study was conducted in a herd of Slovak Pied cattle breed (with share of HF blood). Based on the performance results from three subsequent months, cows in the 2nd and 3rd lactation with SCC up to 200 thousand/ml (8 heads, 32 quarters), and above 800 thousand/ml (8 heads, 32 quarters), after the 4th month of lactation, were selected...
December 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28088587/late-onset-neonatal-sepsis-in-arab-states-in-the-gulf-region-two-year-prospective-study
#4
Majeda S Hammoud, Abdullah Al-Taiar, Sameer Y Al-Abdi, Hussain Bozaid, Anwar Khan, Laila M AlMuhairi, Moghis Ur Rehman
OBJECTIVES: This study aimed to investigate the incidence of Late-Onset Sepsis (LOS) in neonatal intensive care units (NICUs) in Arab states in the gulf region and describe the main causative organisms and their antibiotic resistance. METHODS: Observational prospective cohort study was conducted over two-year period in five NICUs in Kuwait, Saudi Arabia and United Arab Emirates. LOS was defined as the growth of a single potentially pathogenic organism from blood or cerebrospinal fluid in infants >3days of age with clinical and laboratory findings consistent with infection...
January 11, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28087612/biofilm-formation-and-antimicrobial-resistance-genes-of-coagulase-negative-staphylococci-isolated-from-cows-with-mastitis-in-argentina
#5
Mariela E Srednik, Yannick D N Tremblay, Josée Labrie, Marie Archambault, Mario Jacques, Fernández Cirelli Alicia, Elida R Gentilini
Mastitis affects the health and welfare of dairy cows worldwide. Coagulase-negative staphylococci (CNS) are known to form biofilms and are increasingly recognized as a cause of persistent bovine intramammary infections. A total of 90 CNS isolated from cows with clinical and subclinical mastitis in Argentina from 2008-2014 were identified by PCR-RFLP using the gap gene. Standard microtiter plate assays were used to assess CNS biofilm formation and Staphylococcus haemolyticus species formed the strongest biofilms...
January 12, 2017: FEMS Microbiology Letters
https://www.readbyqxmd.com/read/28054893/utility-of-omentoplasty-in-mediastinitis-treatment-following-sternotomy
#6
Abdurrahim Colak, Ugur Kaya, Münacettin Ceviz, Necip Becit, Fehimcan Sevil, Hikmet Kocak
BACKGROUND: Mediastinal infection is one of the most serious complications that occurs following open-heart surgery by sternotomy. In the present study, omentoplasty was initially and aggressively used to treat the infection and prevent the recurrence caused by bones in cases of mediastinitis following open-heart surgery at our clinic. METHODS: Among the 3656 patients who underwent surgery at our department of cardiovascular surgery between January 1996 and December 2012, omentoplasty as a treatment for mediastinitis was applied to 19 (0...
1, 2016: Heart Surgery Forum
https://www.readbyqxmd.com/read/28050073/drug-sensitivity-pattern-of-various-staphylococcus-species-isolated-at-a-tertiary-care-hospital
#7
Lavan Singh, M P Cariappa, N K Das
BACKGROUND: Staphylococcus aureus and other Staphylococcus species are important pathogenic organisms and are responsible for various hospital infections. These are the predominant organisms found in pus and blood culture isolates. Infections arising due to these bacterial isolates are difficult to treat because of developing multidrug resistance. METHODS: Over a 1-year period at a tertiary care hospital laboratory, 524 Staphylococci species were isolated from pus, blood and urine samples and species-level identification was done...
December 2016: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28050071/prevalence-and-molecular-characterization-of-methicillin-resistance-among-coagulase-negative-staphylococci-at-a-tertiary-care-center
#8
Puneet Bhatt, Kundan Tandel, Alina Singh, M Kumar, Naveen Grover, A K Sahni
BACKGROUND: Methicillin-resistant Coagulase-negative Staphylococci (MR-CoNS) have emerged as an important cause of nosocomial infections especially in patients with prosthetic devices and implants. This study was conducted with an aim to determine the prevalence of methicillin resistance among CoNS isolates at a tertiary care center by both phenotypic and genotypic methods. METHODS: This cross sectional study was carried out from September 2011 to February 2014 in which 150 non-repetitive clinical isolates of CoNS were identified at the species level by conventional phenotypic methods...
December 2016: Medical Journal, Armed Forces India
https://www.readbyqxmd.com/read/28041734/identification-of-bovine-associated-coagulase-negative-staphylococci-by-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry-using-a-direct-transfer-protocol
#9
M Cameron, H W Barkema, J De Buck, S De Vliegher, M Chaffer, J Lewis, G P Keefe
This study evaluated matrix-assisted laser desorption/ionization time-of-flight mass spectrometry (MALDI-ToF MS) for the identification of bovine-associated coagulase-negative staphylococci (CNS), a heterogeneous group of different species. Additionally, we aimed to expand the MALDI-ToF MS database with new reference spectra as required to fill the gaps within the existing commercial spectral library. A total of 258 isolates of CNS were used in the study, covering 16 different CNS species. The majority of the isolates were previously identified by rpoB gene sequencing (n = 219), and the remainder were identified by sequencing of 16S rRNA, hsp60, or both rpoB and hsp60...
December 29, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/28018869/pathogens-and-antimicrobial-susceptibility-profiles-in-critically-ill-patients-with-bloodstream-infections-a-descriptive-study
#10
Rachel D Savage, Robert A Fowler, Asgar H Rishu, Sean M Bagshaw, Deborah Cook, Peter Dodek, Richard Hall, Anand Kumar, François Lamontagne, François Lauzier, John Marshall, Claudio M Martin, Lauralyn McIntyre, John Muscedere, Steven Reynolds, Henry T Stelfox, Nick Daneman
BACKGROUND: Surveillance of antimicrobial resistance is vital to guiding empirical treatment of infections. Collating and reporting routine data on clinical isolate testing may offer more timely information about resistance patterns than traditional surveillance network methods. METHODS: Using routine microbiology testing data collected from the Bacteremia Antibiotic Length Actually Needed for Clinical Effectiveness retrospective cohort study, we conducted a descriptive secondary analysis among critically ill patients in whom bloodstream infections had been diagnosed in 14 intensive care units (ICUs) in Canada...
October 2016: CMAJ Open
https://www.readbyqxmd.com/read/28013528/pathogens-and-antibiotic-sensitivities-in-endophthalmitis
#11
Geraldine R Slean, Neal H Shorstein, Liyan Liu, John F Paschal, Kevin L Winthrop, Lisa J Herrinton
BACKGROUND: Antibiotic prophylaxis in cataract surgery is intended to minimize endophthalmitis. We describe pathogenic organisms, antibiotic sensitivities, and antibiotic prophylaxis in culture-proven endophthalmitis cases. DESIGN: Retrospective consecutive case series, community-based setting. SAMPLES: 215 cases of endophthalmitis after cataract surgery performed during 2007-2012 in Kaiser Permanente, California. METHODS AND MAIN OUTCOME MEASURES: Descriptive analysis of isolated organisms and antibiotic sensitivities in relation to antibiotic prophylaxis in culture-proven endophthalmitis cases...
December 25, 2016: Clinical & Experimental Ophthalmology
https://www.readbyqxmd.com/read/28012900/pathogenic-conversion-of-coagulase-negative-staphylococci
#12
Wenqi Yu, Hwan Keun Kim, Sabine Rauch, Olaf Schneewind, Dominique Missiakas
Humans and animals are colonized by members of the genus Staphylococcus, however only some of these species evolved to cause invasive disease. The genetic basis for conversion of commensal staphylococci into pathogens is not known. We hypothesized that Staphylococcus aureus genes for coagulation and agglutination in vertebrate blood (coa, vwb and clfA) may support pathogenic conversion. Expression of coa and vwb in Staphylococcus epidermidis or Staphylococcus simulans supported a coagulase-positive phenotype but not the ability to cause disease in a mouse model of bloodstream infection...
December 21, 2016: Microbes and Infection
https://www.readbyqxmd.com/read/28012637/determination-of-clinical-significance-of-coagulase-negative-staphylococci-in-blood-cultures
#13
Asiye Karakullukçu, Mert Ahmet Kuşkucu, Sevgi Ergin, Gökhan Aygün, Kenan Midilli, Ömer Küçükbasmaci
The aim of this study was to investigate the criteria used to distinguish coagulase-negative staphylococci (CoNS) bacteremia from contamination. We evaluated 162 adult patients with CoNS-positive blood cultures (BCs). Of the 162 patients, 35 (21.6%) had at least 2 positive BCs and 127 (78.4%) had a single positive BC. According to the Laboratory-Confirmed Bloodstream Infection (LCBI) criteria, 24 (14.8%) patients with the same species of CoNS had true bacteremia, and 138 (85.2%) patients had contaminants. Despite the detection of the same CoNS species, 9 of the 24 patients had different CoNS genotypes...
December 14, 2016: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28002109/neonatal-bacterial-conjunctivitis-in-korea-in-the-21st-century
#14
Kang Yeun Pak, Sung Il Kim, Jong Soo Lee
PURPOSE: To investigate the microbial cause and antibiotic susceptibility of neonatal bacterial conjunctivitis in Korean patients in the 21st century. METHODS: We retrospectively reviewed the medical records of patients diagnosed with neonatal bacterial conjunctivitis between January 2000 and December 2015. We recorded the organism, antibiotic susceptibility, and antibiotics used. RESULTS: A total of 82 neonates were included in the study (53 males and 29 females), with a mean age of 17...
December 20, 2016: Cornea
https://www.readbyqxmd.com/read/27997618/evaluation-of-a-commercial-multiplex-pcr-assay-for-detection-of-pathogen-dna-in-blood-from-patients-with-suspected-sepsis
#15
Ingrid Ziegler, Anna Fagerström, Kristoffer Strålin, Paula Mölling
The Magicplex Sepsis Real-time Test (MST) is a commercial multiplex PCR that can detect more than 90 different pathogens in blood, with an analysis time of six hours. The aim of the present study was to evaluate this method for the detection of bloodstream infection (BSI). An EDTA whole blood sample for MST was collected together with blood cultures (BC) from patients with suspected sepsis at the Emergency Department of a university hospital. Among 696 study patients, 322 (46%) patients were positive with at least one method; 128 (18%) were BC positive and 268 (38%) were MST positive...
2016: PloS One
https://www.readbyqxmd.com/read/27989049/infective-endocarditis-in-hemodialysis-patients
#16
Rahul Vasudev, Priyank Shah, Supreet Kaur, Chandrika Chitturi, Sundermurthy Yamini, Ashesha Mechineni, Chandra Chandran, Mahesh Bikkina, Fayez Shamoon
BACKGROUND: Infective endocarditis (IE) is a major cause of morbidity and mortality in patients with end-stage renal disease (ESRD). The study aim was to evaluate the demographic, clinical, microbiological and inpatient mortality data of IE in hemodialysis patients. METHODS: Data were analyzed for all IE patients admitted to the authors' 800-bed tertiary care hospital between January 2001 and December 2014. These data included demographics, comorbidities, clinical and microbiological characteristics, echocardiographic findings, complications, outcomes, and in-patient mortality...
May 2016: Journal of Heart Valve Disease
https://www.readbyqxmd.com/read/27988849/bacterial-reduction-and-shift-with-npwt-after-surgical-debridements-a-retrospective-cohort-study
#17
Thorsten Jentzsch, Georg Osterhoff, Pawel Zwolak, Burkhardt Seifert, Valentin Neuhaus, Hans-Peter Simmen, Gerrolt N Jukema
BACKGROUND: Surgical debridement, negative-pressure wound therapy (NPWT) and antibiotics are used for the treatment of open wounds. However, it remains unclear whether this treatment regimen is successful in the reduction and shift of the bacterial load. METHODS: After debridement in the operating room, NPWT, and antibiotic treatment, primary and secondary consecutive microbiological samples of 115 patients with 120 open wounds with bacterial or yeast growth in ≥1 swab or tissue microbiological sample(s) were compared for bacterial growth, Gram staining and oxygen use at a level one trauma center in 2011...
December 17, 2016: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/27986623/one-year-incidence-of-prosthetic-joint-infection-in-total-hip-arthroplasty-a-cohort-study-with-linkage-of-the-danish-hip-arthroplasty-register-and-danish-microbiology-databases
#18
P H Gundtoft, A B Pedersen, H C Schønheyder, J K Møller, S Overgaard
OBJECTIVE: To examine the trend of Prosthetic Joint Infections (PJI) following primary total hip arthroplasty (THA) and the antimicrobial resistance of the bacteria causing these infections. MATERIALS AND METHODS: We identified a population-based cohort of patients in the Danish Hip Arthroplasty Register (DHR) who had primary THA and received their surgery in Jutland or Funen between 2005 and 2014. We followed the patients until revision, emigration, death, or up to 1-year of follow-up...
December 13, 2016: Osteoarthritis and Cartilage
https://www.readbyqxmd.com/read/27974958/frequency-of-antiseptic-resistance-among-staphylococcus-aureus-and-coagulase-negative-staphylococci-isolated-from-a-university-hospital-in-central-iran
#19
Nona Taheri, Abdollah Ardebili, Alireza Amouzandeh-Nobaveh, Ehsanollah Ghaznavi-Rad
OBJECTIVES: Reduced biocide susceptibility in Staphylococci is associated with various antiseptic resistance genes encoding efflux systems. Our aim was to determine the susceptibility to three disinfectant agents, including benzalkonium chloride (BAC), benzethonium chloride (BZT), and chlorhexidine digluconate (CHDG) among clinical isolates of Staphylococcus aureus and coagulase-negative Staphylococci (CoNS). METHODS: The minimum inhibitory concentration (MIC) of 60 methicillin-resistant S...
November 2016: Oman Medical Journal
https://www.readbyqxmd.com/read/27934830/coagulase-negative-staphylococci-causing-blood-stream-infection-at-an-indian-tertiary-care-hospital-prevalence-antimicrobial-resistance-and-molecular-characterisation
#20
S Singh, B Dhawan, A Kapil, S K Kabra, A Suri, V Sreenivas, B K Das
INTRODUCTION: Recent years have seen a rise of coagulase-negative staphylococci (CoNS) from common contaminants to agents of nosocomial blood stream infections (BSI's). Molecular typing and establishing a correlation with antibiotic resistance is essential particularly in countries like India where genotyping studies for drug-resistant CoNS are sparse. METHODS: A prospective study was done over 18 months, wherein 42,693 blood samples were received, and 59 patients with BSI due to CoNS were evaluated...
October 2016: Indian Journal of Medical Microbiology
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