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Antibiotic resistant Staphylococcus

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https://www.readbyqxmd.com/read/29786847/assessment-of-antibiotic-susceptibility-within-lactic-acid-bacteria-and-coagulase-negative-staphylococci-isolated-from-hunan-smoked-pork-a-naturally-fermented-meat-product-in-china
#1
Jing Wang, Xinyuan Wei, Mingtao Fan
The aim of this study was to evaluate the antibiotic susceptibility of lactic acid bacteria (LAB) and coagulase-negative staphylococci (CNS) strains isolated from naturally fermented smoked pork produced in Hunan, China. A total of 48 strains were isolated by selective medium and identified at the species level by 16S rRNA gene sequencing as follows: Staphylococcus carnosus (23), Lactobacillus plantarum (12), Lactobacillus brevis (10), Lactobacillus sakei (1), Weissella confusa (1), and Weissella cibaria (1)...
May 22, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29785214/etiological-trends-and-patterns-of-antimicrobial-resistance-in-respiratory-infections
#2
Salma M Al-Zain Ahmed, Sara S Abdelrahman, Doua M Saad, Isra S Osman, Modasir G Osman, Eltahir A G Khalil
Background: Respiratory infections are one of the commonest causes of morbidity and mortality related to infectious diseases worldwide. The emergence of antimicrobial resistance is a major global health problem which is well established in developing countries. Good clinical suspicion and correct laboratory identification of respiratory infection causing organisms followed by the appropriate management are needed to compact both community-acquired and nosocomial infection respiratory infections...
2018: Open Microbiology Journal
https://www.readbyqxmd.com/read/29785070/analysis-of-antibiotics-resistant-genes-in-different-strains-of-staphylococcus-aureus
#3
Benson Otarigho, Mofolusho O Falade
The control of Staphylococcus aureus infection is being hampered by methicillin and other resistant strains. The identification of the unique antibiotic resistant genes from the genomes of various strains of S. aureus is of interest. We analyzed 11 S. aureus genomes sequences for Antibiotics Resistance Genes (ARGs) using CARD 2017 platform. We identified 32 ARGs across 11 S. aureus strains. Tet(38), norB, lmrB, mepA and mepR were present across genomes except for S. aureus strain UTSW MRSA 55. The mepA and mepR were found across 11 different genomes...
2018: Bioinformation
https://www.readbyqxmd.com/read/29784849/evaluation-of-telavancin-alone-and-combined-with-ceftaroline-or-rifampin-against-methicillin-resistant-staphylococcus-aureus-mrsa-in-an-in-vitro-biofilm-model
#4
Seyedehameneh Jahanbakhsh, Nivedita B Singh, Juwon Yim, Warren E Rose, Michael J Rybak
Biofilm-producing methicillin-resistant Staphylococcus aureus (MRSA) infections are challenging due to increasing antibiotic resistance. Synergistic activity of lipopeptides and lipoglycopeptides with β-lactams has been demonstrated for MRSA, but little is known about biofilm-embedded organisms. Our objective was to evaluate two telavancin (TLV) dosage regimens (7.5 mg/kg and 10 mg/kg q 24h)alone and in combination with ceftaroline (CPT) (600 mg q 8 h) or rifampin (RIF) (450 mg q 12h) against two biofilm-producing MRSA (494 and N315)...
May 21, 2018: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29781674/proactive-udder-health-management-in-south-africa-and-monitoring-of-antibiotic-resistance-of-staphylococcus-aureus-in-dairy-herds-from-2001-to-2010
#5
Joanne Karzis, Inge-Marie Petzer, Edward F Donkin, Vinny Naidoo
Antibiotic resistance of strains of Staphylococcus aureus isolated from bovine milk is of concern internationally. The objective of this study was to investigate trends of resistance of S. aureus to antibiotics administered to dairy cows in 19 South African and one Zambian dairy herds (participating in the South African proactive udder health management programme) and to identify possible contributing factors. The resistance of S. aureus strains to eight commonly used antibiotics in South Africa from 2001 to 2010 was evaluated...
May 7, 2018: Journal of the South African Veterinary Association
https://www.readbyqxmd.com/read/29781595/-results-of-the-implementation-of-an-antimicrobial-stewardship-program-in-the-gerencia-de-atenci%C3%A3-n-integrada-of-alcazar-de-san-juan-castilla-la-mancha
#6
M A Asencio Egea, O Herráez Carrera, M Huertas Vaquero, H D Patiño Ortega, M Franco Huerta, P Alcázar Carmona, M C Conde García, C Muñoz-Cuevas, C Román Ortiz, J Gaitán Pitera, R Carranza González, J R Barberá
OBJECTIVE: Our aim was to evaluate the efficiency of an ASP after its implementation in 2016 in a Spanish hospital quality system. METHODS: Efficiency of the ASP was measured by process and outcome indicators at the level of the patient's quality of life, antimicrobial consumption and percentage of resistance to them during the 2016-2017 period. In 2017, the failures mode and effects analysis (FMEA) methodology was applied. An annual satisfaction survey was conducted...
May 18, 2018: Revista Española de Quimioterapia: Publicación Oficial de la Sociedad Española de Quimioterapia
https://www.readbyqxmd.com/read/29781425/clinical-predictors-of-methicillin-resistance-and-their-impact-on-mortality-associated-with-staphylococcus-aureus-bacteraemia
#7
Y M Wi, J Y Rhee, C I Kang, D R Chung, J H Song, K R Peck
We investigated the clinical predictors of methicillin-resistance and their impact on mortality in 371 patients with Staphylococcus aureus bacteraemia identified from two prospective multi-centre studies. Methicillin resistant S. aureus (MRSA) accounted for 42.2% of community-onset and 74.5% of hospital-onset cases. No significant clinical difference was found between patients infected with MRSA vs. methicillin-sensitive S. aureus (MSSA), except that the former were more likely to have had hospital-onset bacteraemia and received antibiotics in the preceding 90 days...
May 21, 2018: Epidemiology and Infection
https://www.readbyqxmd.com/read/29781315/detection-and-treatment-of-staphylococcus-aureus-colonization-in-chronic-hand-eczema-a-multicenter-study
#8
Yue Chen, Xin Wang, Chengzhong Zhang, Weimin Shi
BACKGROUND: Chronic hand eczema (CHE) is a common chronic inflammatory skin disease of the hands that influenses public health. Staphylococcus aureus (SA) colonization play an important role in CHE morbidity and progression, which also correlated to chronicity and severity of the disease. METHODS: From October 1 to November 31, eighty patient volunteers with chronic hand eczema and ten healthy volunteers were chosen from the four cities. Polymerase Chain Reaction (PCR) as a new diagnostic method for SA and methicillin resistant staphylococcus aureus (MRSA), was superior to the traditional method of germiculture...
May 21, 2018: Journal of Dermatological Treatment
https://www.readbyqxmd.com/read/29780759/para-substituted-functionalised-ferrocene-esters-with-novel-antibacterial-properties
#9
Kevin Muñoz Forti, Faviola Bernard, Gustavo Santiago-Collazo, Waldemar Garcia, Jose L Vera, Enrique Meléndez, Edu B Suarez-Martinez
Introduction: Bacterial antibiotic resistance is on rise despite advances in the development of new antibiotics. In an attempt to circumvent resistance, scientists are shifting focus from modifying existent antibiotics to identifying new antibiotic compounds. Aim: To assess the potential antibiotic effects of functionalised ferrocenecarboxylates para-substituted on the phenoxy pendant group to form: 4-fluorophenyl, 4-chlorophenyl, 4-bromophenyl, 4-iodophenyl and 4-(H-pyrrol-1-yl)phenyl...
February 2018: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/29779917/antimicrobial-resistance-among-migrants-in-europe-a-systematic-review-and-meta-analysis
#10
Laura B Nellums, Hayley Thompson, Alison Holmes, Enrique Castro-Sánchez, Jonathan A Otter, Marie Norredam, Jon S Friedland, Sally Hargreaves
BACKGROUND: Rates of antimicrobial resistance (AMR) are rising globally and there is concern that increased migration is contributing to the burden of antibiotic resistance in Europe. However, the effect of migration on the burden of AMR in Europe has not yet been comprehensively examined. Therefore, we did a systematic review and meta-analysis to identify and synthesise data for AMR carriage or infection in migrants to Europe to examine differences in patterns of AMR across migrant groups and in different settings...
May 17, 2018: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/29779567/factors-for-persistence-of-mrsa-carriage-a-year-after-initial-detection-in-individuals-from-various-healthcare-institutions
#11
Ester Vendrell Torra, Lluís Force Sanmartín, Goretti Sauca Subias, Elisabet Palomera Fànegas, Pilar Barrufet Barqué, Josep Anton Capdevila Morell
INTRODUCTION AND OBJECTIVE: We studied the natural history of patients with chronic stable illnesses that are colonized by Methicillin Resistant Staphylococcus aureus (MRSA). The aim was to determine the persistence colonization 1 year after. Moreover, we intended to disclose factors that predict MRSA persistence. MATERIAL AND METHODS: A multicentric, prospective observational study was designed. Patients from an acute-care hospital and 4 long-term healthcare facilities were included...
May 17, 2018: Medicina Clínica
https://www.readbyqxmd.com/read/29778961/uva-induced-antimicrobial-activity-of-zno-ag-nanocomposite-covered-surfaces
#12
Meeri Visnapuu, Merilin Rosenberg, Egle Truska, Ergo Nõmmiste, Andris Šutka, Anne Kahru, Mihkel Rähn, Heiki Vija, Kaja Orupõld, Vambola Kisand, Angela Ivask
Application of efficient antimicrobial surfaces has been estimated to decrease both, the healthcare-associated infections and the spread of antibiotic-resistant bacteria. In this paper, we prepared ZnO and ZnO/Ag nanoparticle covered surfaces and evaluated their antimicrobial efficacy towards a Gram-negative bacterial model (Escherichia coli), a Gram-positive bacterial model (Staphylococcus aureus) and a fungal model (Candida albicans) in the dark and under UVA illumination. The surfaces were prepared by spin coating aliquots of ZnO and ZnO/Ag nanoparticle suspensions onto glass substrates...
May 4, 2018: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/29775724/biological-activities-and-phytocompounds-of-northwest-algeria-ajuga-iva-l-extracts-partial-identification-of-the-antibacterial-fraction
#13
Saida Medjeldi, Lamjed Bouslama, Amina Benabdalla, Rim Essid, Soumaya Haou, Salem Elkahoui
The use of synthetic food additive and the appearance of antibiotic resistance are at the basis of important human health problems. The substitution of synthetic compounds with new natural substances extracted from plants or microorganisms is therefore the ideal solution to this scourge. The objective of this work was to evaluate the phyto-constituents (polyphenols, flavonoids and condensed tannins), and to test the biological activities (antioxidant, antibacterial and antiviral) of the Ajuga iva (L) aerial part extracts...
May 15, 2018: Microbial Pathogenesis
https://www.readbyqxmd.com/read/29775684/virulence-determinants-biofilm-production-and-antimicrobial-susceptibility-in-staphylococcus-aureus-causing-device-associated-infections-in-a-tunisian-hospital
#14
I Mesrati, M Saidani, M Jemili, S Ferjeni, A Slim, I Boutiba-Ben Boubaker
Staphylococcus aureus is clinically relevant pathogen that cause device-related infections driven by several virulence factors. In this study we characterize S. aureus isolates involved in medical device-related infections in Tunisian patients. Forty consecutive S. aureus strains causing device-related infections (DRI group) and 47 randomly selected S. aureus strains causing non-device-related infections (NDRI group) were collected. All strains were phenotypically screened for antibiotic susceptibility and biofilm forming ability...
May 15, 2018: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/29775283/magnetic-glycol-chitin-based-hydrogel-nanocomposite-for-combined-thermal-and-d-amino-acid-assisted-biofilm-disruption
#15
Eric C Abenojar, Sameera Wickramasinghe, Minseon Ju, Sarika Uppaluri, Alison Klika, Jaiben George, Wael Barsoum, Salvatore J Frangiamore, Carlos A Higuera-Rueda, Anna Cristina S Samia
Bacterial biofilms are highly antibiotic resistant microbial cell associations that lead to chronic infections. Unlike free-floating planktonic bacterial cells, the biofilms are encapsulated in a hardly penetrable extracellular polymeric matrix and, thus, demand innovative approaches for treatment. Recent advancements on the development of gel-nanocomposite systems with tailored therapeutic properties provide promising routes to develop novel antimicrobial agents that can be designed to disrupt and completely eradicate preformed biofilms...
May 18, 2018: ACS Infectious Diseases
https://www.readbyqxmd.com/read/29774213/a-rapid-growth-independent-antibiotic-resistance-detection-test-by-sybr-green-propidium-iodide-viability-assay
#16
Jie Feng, Rebecca Yee, Shuo Zhang, Lili Tian, Wanliang Shi, Wen-Hong Zhang, Ying Zhang
Antibiotic-resistant bacteria have caused huge concerns and demand innovative approaches for their prompt detection. Current antimicrobial susceptibility tests (AST) rely on the growth of the organisms which takes 1-2 days for fast-growing organisms and several weeks for slow growing organisms. Here, we show for the first time the utility of the SYBR Green I/propidium iodide (PI) viability assay for rapidly identifying antibiotic resistance in less than 30 min for major, antibiotic-resistant, fast-growing bacteria, such as Staphylococcus aureus, Escherichia coli, Klebsiella pneumoniae , and Acinetobacter baumannii for bactericidal and bacteriostatic agents and in 16 h for extremely rapid detection of drug resistance for isoniazid and pyrazinamide in slow-growing Mycobacterium tuberculosis ...
2018: Frontiers in Medicine
https://www.readbyqxmd.com/read/29774178/effects-of-local-application-of-nano-silver-on-osteomyelitis-and-soft-tissue-infections-an-experimental-study-in-rats
#17
Bahattin Kemah, Gökçer Uzer, Yalçın Turhan, Burak Özturan, Bülent Kılıç, Bilge Sümbül Gültepe, Ayşe Bahar Ceyran, Selim Ertürk, Burak Aksoylu, Özlem Şenaydın, Korhan Özkan
Purpose : Bone and soft tissue infections are among the least desired complications after orthopaedic surgery. This study analysed the in vivo effects of the local application of nano-silver particles (AgNPs) [1nm = 1 billionth of a meter] in soft tissue infections. Materials-Method : An experimental osteomyelitis model was formed by inoculating both tibias of 24 rats with methicillin-resistant Staphylococcus aureus . The rats were followed without treatment for 21 days. Blood samples and tibial x-rays at day 21 confirmed the development of infection...
2018: Journal of Bone and Joint Infection
https://www.readbyqxmd.com/read/29773788/immunogene-therapy-with-fusogenic-nanoparticles-modulates-macrophage-response-to-staphylococcus-aureus
#18
Byungji Kim, Hong-Bo Pang, Jinyoung Kang, Ji-Ho Park, Erkki Ruoslahti, Michael J Sailor
The incidence of adverse effects and pathogen resistance encountered with small molecule antibiotics is increasing. As such, there is mounting focus on immunogene therapy to augment the immune system's response to infection and accelerate healing. A major obstacle to in vivo gene delivery is that the primary uptake pathway, cellular endocytosis, results in extracellular excretion and lysosomal degradation of genetic material. Here we show a nanosystem that bypasses endocytosis and achieves potent gene knockdown efficacy...
May 17, 2018: Nature Communications
https://www.readbyqxmd.com/read/29771255/return-of-the-tetracyclines-omadacycline-a-novel-aminomethylcycline-antimicrobial
#19
J C Cho, L M Childs-Kean, M T Zmarlicka, M P Crotty
Omadacycline is a novel aminomethylcycline antimicrobial agent that is available in both oral and intravenous formulations. The distinguishing structural characteristics of omadacycline from other tetracyclines allow for its continued antimicrobial activity in the presence of traditional tetracycline resistance mechanisms (efflux pumps and ribosomal protection proteins). Omadacycline has been found to have potent activity against antibiotic-resistant pathogens including methicillin-resistant Staphylococcus aureus, vancomycin-resistant Enterococcus, extended spectrum beta-lactamase-producing Escherichia coli and multidrug-resistant Streptococcus pneumoniae...
March 2018: Drugs of Today
https://www.readbyqxmd.com/read/29768720/bis-cyclic-guanidine-as-a-novel-class-of-compounds-potent-against-clostridium-difficile
#20
Chunhui Li, Peng Teng, Zhong Peng, Peng Sang, Xingmin Sun, Jianfeng Cai
Clostridium difficile infection (CDI) symptoms range from diarrhea to severe toxic megacolon and even death. Due to its rapid acquisition of resistance, C. difficile is listed as an urgent antibiotic-resistant threat, and has surpassed methicillin-resistant Staphylococcus aureus (MRSA) as the most common hospital-acquired infections in the USA. To combat the pathogen, the new structural class of pseudo peptides that exhibit antimicrobial activities could play an important role. Herein, we report that bis-cyclic guanidine compounds that exhibit potent antibacterial activity against C...
May 16, 2018: ChemMedChem
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