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https://www.readbyqxmd.com/read/29222698/efficacy-evaluation-of-iclaprim-in-a-neutropenic-rat-lung-infection-model-with-methicillin-resistant-staphylococcus-aureus-entrapped-in-alginate-microspheres
#1
David B Huang, Ian Morrissey, Timothy Murphy, Stephen Hawser, Mark H Wilcox
The objective of this study was to demonstrate the efficacy of iclaprim in a neutropenic rat lung infection model with methicillin-resistant Staphylococcus aureus (MRSA) entrapped in alginate beads. An inoculum of 5.25 × 105 colony-forming units (CFU)/mL of S. aureus strain AH1252 was administered intratracheally to rats with prepared alginate bacteria suspensions. Beginning 2 h post-infection, rats received: (1) iclaprim 80 mg/kg (n = 16); (2) iclaprim 60 mg/kg (n = 16), or (3) vancomycin 50 mg/kg (n = 24), for 3 days via subcutaneous (SC) injection every 12 h...
December 8, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/29222405/multiple-weekly-dalbavancin-dosing-for-the-treatment-of-native-vertebral-osteomyelitis-caused-by-methicillin-resistant-staphylococcus-aureus-a-case-report
#2
Thamer A Almangour, Valerie Fletcher, Mohammed Alessa, Abdullah A Alhifany, Deanne Tabb
BACKGROUND Native vertebral osteomyelitis (NVO) is a common form of hematogenous osteomyelitis, with Staphylococcus aureus (S. aureus) being the most commonly isolated organism. Dalbavancin is approved by the US Food and Drug Administration (FDA) for the treatment of acute bacterial skin and skin structure infections (ABSSSI) and has a sufficiently promising pharmacokinetic and pharmacodynamic profile to be considered for the treatment of vertebral osteomyelitis. We describe here what is probably the first reported case of using multiple weekly dalbavancin to treat a complicated methicillin-resistant Staphylococcus aureus (MRSA) bacteremia and vertebral osteomyelitis...
December 9, 2017: American Journal of Case Reports
https://www.readbyqxmd.com/read/29222105/the-emergency-medical-service-microbiome
#3
Andrew J Hudson, Graeme D Glaister, Hans-Joachim Wieden
Emergency medical services (EMS) personnel are an integral component of the healthcare framework and function to transport patients from various locations to and between care facilities. In addition to physical injury, EMS personnel are expected to be at high risk to acquire and transmit healthcare associated infections (HAIs) in the workplace. However, currently little is known about EMS biosafety risk factors and the epidemiological contribution of EMS to pathogen transmission within and outside of the healthcare sector...
December 8, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29220792/4-quinolone-derivatives-and-their-activities-against-gram-positive-pathogens
#4
Gui-Fu Zhang, Shu Zhang, Baofeng Pan, Xiaofeng Liu, Lian-Shun Feng
Gram-positive bacteria are responsible for a broad range of infectious diseases, and the emergency and wide spread of drug-resistant Gram-positive pathogens including MRSA and MRSE has caused great concern throughout the world. 4-Quinolones which are exemplified by fluoroquinolones are mainstays of chemotherapy against various bacterial infections including Gram-positive pathogen infections, and their value and role in the treatment of bacterial infections continues to expand. However, the resistance of Gram-positive organisms to 4-quinolones develops rapidly and spreads widely, making them more and more ineffective...
November 29, 2017: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29217879/iga-dominant-infection-related-glomerulonephritis-in-india-a-single-center-experience
#5
J Dhanapriya, T Balasubramaniyan, S P Maharajan, T Dineshkumar, R Sakthirajan, N Gopalakrishnan, M Nagarajan
IgA-dominant infection-related glomerulonephritis (IRGN) is a distinct morphologic variant of IRGN, characterized by dominant or codominant glomerular deposits of IgA, mostly in elderly and patients with diabetes. More cases are being reported in recent times due to increased awareness of the disease entity and increased rate of Staphylococcus infection. It usually presents as rapidly progressive renal failure with proteinuria, and treatment guidelines for this disease entity are not well defined. We report here 12 cases of IgA-dominant IRGN seen over a period of 5 years from a single center...
November 2017: Indian Journal of Nephrology
https://www.readbyqxmd.com/read/29217101/a-novel-in-situ-simulation-intervention-used-to-mitigate-an-outbreak-of-methicillin-resistant-staphylococcus-aureus-in-a-neonatal-intensive-care-unit
#6
Kathleen Gibbs, Samuel DeMaria, Scarlett McKinsey, Andrea Fede, Anne Harrington, Deborah Hutchison, Carol Torchen, Adam Levine, Andrew Goldberg
OBJECTIVE: To describe the successful implementation of an in situ simulation program to diagnose and correct latent safety threats in a level 4 neonatal intensive care unit (NICU) to mitigate a methicillin-resistant Staphylococcus aureus (MRSA) outbreak. STUDY DESIGN: An investigational report describes a simulation intervention that occurred during a 4-month MRSA outbreak in a single-center, 46-bed, newly renovated level 4 NICU. The simulation program was developed for all NICU providers in which they were exposed to a 30-minute in situ human simulation intervention that included education, evaluation, and debriefing to resolve perceived or observed latent safety threats...
December 5, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/29215863/near-infrared-laser-excited-nanoparticles-to-eradicate-multidrug-resistant-bacteria-and-promote-wound-healing
#7
Yue Qiao, Fei Ma, Chao Liu, Bo Zhou, Qiaolin Wei, Wanlin Li, Danni Zhong, Yangyang Li, Min Zhou
With the ever-growing threat of bacterial infections, especially for multidrug-resistant microbial infections, the development of highly effective treatment modalities to inhibit the infections is challenging. Although silver nanoparticles have been intensively applied as an antimicrobial agent for decades, the therapeutic efficacy towards multidrug-resistant bacteria is still unsatisfactory. Here, we show that near-infrared (NIR) laser-excited silver triangular nanoparticles (Tri-Ag) can efficiently kill Gram-negative Escherichia coli (E...
December 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29214045/the-rumen-microbiome-an-underexplored-resource-for-novel-antimicrobial-discovery
#8
Linda B Oyama, Susan E Girdwood, Alan R Cookson, Narcis Fernandez-Fuentes, Florence Privé, Hannah E Vallin, Toby J Wilkinson, Peter N Golyshin, Olga V Golyshina, Ralf Mikut, Kai Hilpert, Jennifer Richards, Mandy Wootton, Joan E Edwards, Marc Maresca, Josette Perrier, Fionnuala T Lundy, Yu Luo, Mei Zhou, Matthias Hess, Hilario C Mantovani, Christopher J Creevey, Sharon A Huws
Antimicrobial peptides (AMPs) are promising drug candidates to target multi-drug resistant bacteria. The rumen microbiome presents an underexplored resource for the discovery of novel microbial enzymes and metabolites, including AMPs. Using functional screening and computational approaches, we identified 181 potentially novel AMPs from a rumen bacterial metagenome. Here, we show that three of the selected AMPs (Lynronne-1, Lynronne-2 and Lynronne-3) were effective against numerous bacterial pathogens, including methicillin-resistant Staphylococcus aureus (MRSA)...
2017: NPJ Biofilms and Microbiomes
https://www.readbyqxmd.com/read/29213999/genetic-and-phenotypic-study-of-methicillin-resistant-staphylococcus-aureus-among-patients-and-health-care-workers-in-mansoura-university-hospital-egypt
#9
Walaa Othman Elshabrawy, Maysaa Elsayed Zaki, Mohamed Farag Kamel
Background and Objectives: Staphylococcus aureus is common pathogen that is associated with many hospital acquired infections. The virulence of S. aureus is identified with resistance to antibiotics especially to methicillin. Therefore the aims of the present study were to detect the carrier rates of methicillin-resistant S. aureus (MRSA) among health care Workers (HCWs) and patients and to compare use of specific chromogenic agar for MRSA culture with PCR for detection of MRSA genes...
April 2017: Iranian Journal of Microbiology
https://www.readbyqxmd.com/read/29213029/generation-of-methicillin-resistant-staphylococcus-aureus-biofilm-infection-in-an-immunosuppressed-rat-model
#10
Tangjuan Liu, Yan Chen, Guan Bi, Jin Luo, Zhongye Du, Jinliang Kong, Yiqiang Chen
BACKGROUND Methicillin-resistant Staphylococcus aureus (MRSA) is a common pathogen responsible for many related infections, and immunosuppressed individuals are more susceptible. Its pathogenicity is associated with its virulence factors, resistance to antibiotics, and ability to form biofilm (BF). MRSA-BF infections in immunosuppressed patients pose great difficulties to clinical treatment. MATERIAL AND METHODS The study aimed to establish a model of MRSA-BF infection in rats with cyclophosphamide (CTX)-induced immunosuppression...
December 7, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29212459/acquisition-and-persistence-of-strain-specific-methicillin-resistant-staphylococcus-aureus-and-their-determinants-in-community-nursing-homes
#11
Nataliya G Batina, Christopher J Crnich, Dörte Döpfer
BACKGROUND: Nursing home residents are frequently colonized with various strains of methicillin-resistant Staphylococcus aureus (MRSA) but the intra-facility dynamics of strain-specific MRSA remains poorly understood. We aimed at identifying and quantifying the associations between acquisition and carriage of MRSA strains and their potential risk factors in community nursing homes using mathematical modeling. METHODS: The data was collected during a longitudinal MRSA surveillance study in six nursing homes in South Central Wisconsin...
December 6, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/29207120/the-antibacterial-effect-of-topical-ozone-on-the-treatment-of-mrsa-skin-infection
#12
Mingsheng Song, Qinghai Zeng, Yaping Xiang, Lihua Gao, Jian Huang, Jinhua Huang, Kathy Wu, Jianyun Lu
Skin can be infected by many types of microorganisms, most commonly by gram‑positive strains of Staphylococcus and Streptococcus spp. Treatment of Staphylococcus aureus (S. aureus) infections, particularly that of methicillin resistant Staphylococcus aureus (MRSA), is a challenge in clinical practice. Ozone therapy has proven to be one of the strongest antiseptics against the majority of microorganisms involved in skin infections. The purpose of the present study was to evaluate the microbicidal effects of topical ozone therapy on S...
November 24, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29203871/cp-and-cp-pgn-protect-mice-against-mrsa-infection-by-inducing-m1-macrophages
#13
Yang Zhang, Xiang-Xiang Li, Yuan Ma, Jie Xu, Li-Na Zhao, Xue-Feng Qian, Xian-Feng Zhang, Jin-Fang Shi, Qing-Zhen Han
Corynebacterium pyruviciproducens (C. pyruviciproducens, CP), as a newly discovered immunomodulator, has been confirmed to have a stronger immunoregulation than Propionibacterium acnes (P. acnes) of the traditional immune adjuvant, by previous experiments with model antigen ovalbumin and sheep red blood cells. Here, it was designed to assess its ability to resist methicillin-resistant Staphylococcus aureus (MRSA), since MRSA as a vital gram positive pathogen is characterized by high morbidity and mortality...
December 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29203479/host-pathogen-treatment-triad-host-factors-matter-most-in-mrsa-bacteremia-outcomes
#14
M Cristina Vazquez Guillamet, Rodrigo Vazquez, Benjamin Deaton, Jenny Shroba, Laia Vazquez, Renee-Claude Mercier
Background: Previous studies have separately emphasized the importance of host, pathogen and treatment characteristics in determining short term or in-hospital mortality for patients with methicillin resistant Staphylococcus aureus (MRSA) bloodstream infections. Less is known about the relative importance of these factors and their interaction in determining short, medium and long-term mortality.Methods: This is an observational cohort study where all patients admitted to University of New Mexico Health Sciences Center (UNM HSC) between July 2002 and August 2013 with MRSA positive blood cultures were recorded...
December 4, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29202897/prevalence-of-mrsa-st398-carriage-in-nursing-home-residents-in-an-area-of-spain-with-a-high-density-of-pig-farming
#15
Esteban Reynaga, Carmen Torres, Marian Garcia-Nuñez, Marian Navarro, Anna Vilamala, Emma Puigoriol, Gianni Enrico Lucchetti, Daniella Nunes, Adriana Silva, Miquel Sabrià
MRSA nasal carriage was detected in 15.7% of 204 residents from 6 nursing homes (NHs) in the Osona region (Barcelona, Spain), and the MRSA-ST398 lineage was identified in 15.6% of MRSA-positive residents and in 2.5% of all NH residents evaluated. Most MRSA-ST398 carriers (4 of 5) had direct or indirect contact with pig farms. Infect Control Hosp Epidemiol 2017;1-4.
December 5, 2017: Infection Control and Hospital Epidemiology
https://www.readbyqxmd.com/read/29201324/molecular-characterization-of-staphylococcus-aureus-strains-isolated-among-hospital-staff-nasal-carriers-of-babol-iran
#16
Parisa Sabbagh, Amirmorteza Ebrahimzadeh-Namvar, Elaheh Ferdosi-Shahandashti, Mostafa Javanian, Soraya Khafri, Mehdi Rajabnia
Background: Staphylococcus aureus (s. aureus) nasal carriers, particularly the healthcare staff can be considered as a potential source for the spread of resistant strains. The aim of this study was to determine the molecular characterization of S. aureus strains isolated among the staff nasal carriers in one of the teaching hospitals in Babol. Methods: A total of 120 nasal swabs were taken from the staff of Ayatollah Rouhani Hospital Babol during 2016. The antibiotic resistance pattern was performed by disc diffusion method for 13 antibiotics, including cefoxitin, cephalothin, teicoplanin, vancomycin, daptomycin, oxacillin, amoxicillin, amikacin, linezolid, ciprofloxacin, levofloxacin, erythromycin, rifampin, according to the CLSI 2015...
2017: Caspian Journal of Internal Medicine
https://www.readbyqxmd.com/read/29201229/antimicrobial-resistance-and-prevalence-of-cvfb-sek-and-seq-genes-among-staphylococcus-aureus-isolates-from-paediatric-patients-with-bloodstream-infections
#17
Bing-Shao Liang, Yan-Mei Huang, Yin-Shuang Chen, Hui Dong, Jia-Liang Mai, Yong-Qiang Xie, Hua-Min Zhong, Qiu-Lian Deng, Yan Long, Yi-Yu Yang, Si-Tang Gong, Zhen-Wen Zhou
Staphylococcus aureus (S. aureus) is one of the most frequently isolated pathogens in neonatal cases of early and late-onset sepsis. Drug resistance profiles and carriage of toxin genes may affect the treatment and outcome of an infection. The present study aimed to determine the antimicrobial resistance patterns and frequencies of the toxin-associated genes conserved virulence factor B (CvfB), staphylococcal enterotoxin Q (SEQ) and staphylococcal enterotoxin K (SEK) among S. aureus isolates recovered from paediatric patients with bloodstream infections (BSIs) in Guangzhou (China)...
November 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29200147/pediatric-deep-venous-thrombosis-associated-with-staphylococcal-infections-single-institutional-experience
#18
Divyaswathi Citla Sridhar, Ossama M Maher, Nidra I Rodriguez
Deep venous thrombosis (DVT) has been previously reported in children with methicillin-resistant Staphylococcus aureus (MRSA). This study reviews our institutional experience by evaluating characteristics and outcomes of children with DVT and staphylococcal infections. Retrospective clinical data from 16 pediatric patients with DVT and staphylococcal infections over a 5-year period was obtained via medical record abstraction. Sixteen patients with a median age at diagnosis of 8 years were included. The most common infection encountered was osteomyelitis (56%)...
December 1, 2017: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/29199097/coagulase-negative-staphylococcal-strain-prevents-staphylococcus-aureus-colonization-and-skin-infection-by-blocking-quorum-sensing
#19
Alexandra E Paharik, Corey P Parlet, Nadjali Chung, Daniel A Todd, Emilio I Rodriguez, Michael J Van Dyke, Nadja B Cech, Alexander R Horswill
Coagulase-negative staphylococci (CoNS) and Staphylococcus aureus are part of the natural flora of humans and other mammals. We found that spent media from the CoNS species Staphylococcus caprae can inhibit agr-mediated quorum sensing by all classes of S. aureus. A biochemical assessment of the inhibitory activity suggested that the S. caprae autoinducing peptide (AIP) was responsible, and mass spectrometric analysis identified the S. caprae AIP as an eight-residue peptide (YSTCSYYF). Using a murine model of intradermal MRSA infection, the therapeutic efficacy of synthetic S...
November 17, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/29197567/biologically-anchored-chitosan-gelatin-srhap-scaffold-fabricated-on-titanium-against-chronic-osteomyelitis-infection
#20
D Nancy, N Rajendran
The obstacles faced to treat chronic osteomyelitis infection clinically led to the search for an ideal biomaterial, resulted in combining two major aspects of bone tissue engineering namely surface modified metallic implant and polymer nanocomposite scaffold. In the present study Gelatin - Strontium incorporated Hydroxyapatite (SrHAP) forming HG scaffold, vancomycin loaded chitosan -gelatin polyelectrolyte complex incorporated gelatin-SrHAP, forming HV scaffolds (HV1-0.5wt% and HV2-1wt% vancomycin) were investigated...
November 29, 2017: International Journal of Biological Macromolecules
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