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Penicillin susceptible staphylococcus

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https://www.readbyqxmd.com/read/27920760/prevalence-of-the-antibiotic-resistance-genes-in-coagulase-positive-and-negative-staphylococcus-in-chicken-meat-retailed-to-consumers
#1
Kamelia Osman, Jihan Badr, Khalid S Al-Maary, Ihab M I Moussa, Ashgan M Hessain, Zeinab M S Amin Girah, Usama H Abo-Shama, Ahmed Orabi, Aalaa Saad
The use of antibiotics in farm management (growing crops and raising animals) has become a major area of concern. Its implications is the consequent emergence of antibiotic resistant bacteria (ARB) and accordingly their access into the human food chain with passage of antibiotic resistance genes (ARG) to the normal human intestinal microbiota and hence to other pathogenic bacteria causative human disease. Therefore, we pursued in this study to unravel the frequency and the quinolone resistance determining region, mecA and cfr genes of methicillin-susceptible Staphylococcus aureus (MSSA), methicillin-resistant S...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27913076/biofilm-production-and-beta-lactamic-resistance-in-brazilian-staphylococcus-aureus-isolates-from-bovine-mastitis
#2
Viviane Figueira Marques, Cássia Couto da Motta, Bianca da Silva Soares, Dayanne Araújo de Melo, Shana de Mattos de Oliveira Coelho, Irene da Silva Coelho, Helene Santos Barbosa, Miliane Moreira Soares de Souza
Staphylococcus spp. play an important role in the etiology of bovine mastitis. Staphylococcus aureus is considered the most relevant species due to the production of virulence factors such as slime, which is required for biofilm formation. This study aimed to evaluate biofilm production and its possible relation to beta-lactamic resistance in 20 S. aureus isolates from bovine mastitic milk. The isolates were characterized by pheno-genotypic and MALDI TOF-MS assays and tested for genes such as icaA, icaD, bap, agr RNAIII, agr I, agr II, agr III, and agr IV, which are related to slime production and its regulation...
October 18, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27902375/improving-time-to-optimal-staphylococcus-aureus-treatment-using-a-penicillin-binding-protein-2a-assay
#3
Sonia N Rao, Sheila K Wang, Jose Gonzalez Zamora, Amy P Hanson, Radhika S Polisetty, Kamaljit Singh
The penicillin-binding protein 2a (PBP2a) assay is a quick, accurate and inexpensive test for determining methicillin susceptibility in Staphylococcus aureus. A pre-post study design was conducted using a PBP2a assay with and without the impact of an antimicrobial stewardship (AS) intervention to improve time to optimal therapy for methicillin-susceptible (MSSA) and methicillin-resistant Staphylococcus aureus (MRSA) isolates. Our results demonstrate significantly improved time to optimal therapy and support the use of a PBP2a assay as part of an AS program for all healthcare facilities, especially those with limited resources...
October 14, 2016: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/27899074/antibiotic-resistance-and-clonal-diversity-of-invasive-staphylococcus-aureus-in-the-rural-ashanti-region-ghana
#4
Denise Dekker, Manuel Wolters, Eva Mertens, Kennedy Gyau Boahen, Ralf Krumkamp, Daniel Eibach, Norbert G Schwarz, Yaw Adu-Sarkodie, Holger Rohde, Martin Christner, Florian Marks, Nimako Sarpong, Jürgen May
BACKGROUND: Staphylococcus aureus is among the most common pathogens isolated from blood cultures in Ghana; yet the epidemiology of blood infections in rural settings is poorly described. This study aims to investigate antimicrobial susceptibility and clonal diversity of S. aureus causing bloodstream infections in two hospitals in the Ashanti Region, Ghana. METHODS: Blood cultures were performed for all febrile patients (≥37.5 °C) on hospital admission. Antibiotic susceptibility testing for S...
November 29, 2016: BMC Infectious Diseases
https://www.readbyqxmd.com/read/27894963/longitudinal-surveillance-on-antibiogram-of-important-gram-positive-pathogens-in-southern-china-2001-to-2015
#5
Zhenbo Xu, Jinhong Xie, Brian M Peters, Bing Li, Lin Li, Guangchao Yu, Mark E Shirtliff
OBJECTIVES: A longitudinal surveillance aimed to investigate the antibiogram of three genus of important Gram-positive pathogens in Southern China during 2001-2015. METHODS: A total of 3849 Staphylococcus, Enterococcus and Streptococcus strains were isolated from Southern China during 2001-2015. Bacteria identification was performed by colony morphology, Gram staining, the API commercial kit and the Vitek 2 automated system. Antimicrobial susceptibility testing was determined by disk diffusion method and MIC method...
November 25, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27889420/correlation-of-phenotypic-tests-with-the-presence-of-the-blaz-gene-for-detection-of-beta-lactamase
#6
Adriano Martison Ferreira, Katheryne Benini Martins, Vanessa Rocha da Silva, Alessandro Lia Mondelli, Maria de Lourdes Ribeiro de Souza da Cunha
Staphylococcus aureus and Staphylococcus saprophyticus are the most common and most important staphylococcal species associated with urinary tract infections. The objective of the present study was to compare and to evaluate the accuracy of four phenotypic methods for the detection of beta-lactamase production in Staphylococcus spp. Seventy-three strains produced a halo with a diameter ≤28mm (penicillin resistant) and all of them were positive for the blaZ gene. Among the 28 susceptible strain (halo ≥29mm), 23 carried the blaZ gene and five did not...
November 11, 2016: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/27887965/muropeptide-signature-of-inhibitors-of-protein-synthesis-correlates-with-%C3%AE-lactam-synergism-against-methicillin-resistant-staphylococcus-aureus
#7
Bertrand Guignard, Paul A Majcherczyk, Cédric Monachon, Jacques Vouillamoz, Philippe Moreillon
Quinupristin/dalfopristin (Q/D) and β-lactams interact positively against methicillin-resistant Staphylococcus aureus (MRSA). The effect extends to other inhibitors of protein synthesis, but not to inhibitors of polynucleotide synthesis or assembly, or to Q/D plus non-β-lactam cell wall inhibitors. Moreover, electron microscopy studies have correlated this effect with a thickened cell wall. In this study, we sought to determine whether inhibitors of protein synthesis might produce a specific peptidoglycan muropeptide signature that would correlate with their positive β-lactam interaction...
November 16, 2016: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27862322/staphylococcus-aureus-isolated-from-tonsillectomized-adult-patients-with-recurrent-tonsillitis
#8
Marta Katkowska, Katarzyna Garbacz, Józef Stromkowski
The aim of this study was to analyze the prevalence and antibiotic resistance of Staphylococcus aureus strains from 118 tonsillectomized adults due to recurrent tonsillitis (RT). The study included strains isolated from the tonsillar surface prior to tonsillectomy, recovered from the tonsillar core at the time of surgery, and from the posterior throat 2-4 weeks after the procedure. Susceptibility of isolates to 19 antibiotics was tested in line with the Clinical and Laboratory Standards Institute recommendations...
November 16, 2016: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/27805525/microbiologic-investigation-of-patients-before-living-donor-liver-transplant
#9
Nelya Bissenova, Aigerim Yergaliyeva
OBJECTIVES: Chronic infections can cause serious complications and create morbidity and mortality for affected patients during immunosuppressive therapy in the posttransplant period. Here, we studied the microbiologic screening results of patients before living-donor liver transplant. MATERIALS AND METHODS: The microbiologic screening results of 25 patients during 2015 at National Scientific Research Center (Astana, Kazakhstan) before livingdonor liver transplant were prospectively analyzed...
November 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27805513/microbiologic-monitoring-of-kidney-transplant-recipients-before-transplant
#10
Nelya Bissenova, Aigerim Yergaliyeva
OBJECTIVES: Drug immunosuppression, traditionally used to minimize autoimmune developments after liver, kidney, heart, and lung transplant, and which requires high doses of corticosteroids, creates favorable conditions for the development of various infectious processes and the existence of pathogens, which can be activated after transplant. This study aimed to investigate the bacterial pathogens in patients before living-donor kidney transplant. MATERIALS AND METHODS: We prospectively investigated 117 clinical samples of 33 patients who were seen during 2015 at the National Scientific Research Center (Astana, Kazakhstan) before living-donor kidney transplant...
November 2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27804112/carriage-rate-and-antibiotic-susceptibility-of-coagulase-positive-staphylococci-isolated-from-healthy-dogs-in-victoria-australia
#11
D C Bean, S M Wigmore
BACKGROUND: Studies in Australia and elsewhere have shown high levels of antibiotic resistance in coagulase-positive staphylococci in dogs visiting veterinary clinics with pyoderma and related conditions. Although important, such studies tend to overestimate the burden of resistance. The aim of the current study was to investigate the prevalence of coagulase-positive staphylococci in healthy dogs in Central Victoria to assess the level of antibiotic resistance among these isolates. METHODS: We recruited 117 healthy dogs into the study...
November 1, 2016: Australian Veterinary Journal
https://www.readbyqxmd.com/read/27795476/a-decennium-of-etiology-and-antimicrobial-susceptibility-patterns-in-patients-with-infective-endocarditis-at-a-university-hospital-thailand
#12
Chotirat Nakaranurack, Chankit Puttilerpong, Gompol Suwanpimolkul
Infective endocarditis is an infection with a high mortality rate. Antimicrobial therapy is important in treatment but data on antimicrobial susceptibilities are limited. This retrospective study analyzed the data of causative microorganisms and antimicrobial susceptibility patterns in patients with infective endocarditis who were aged 18 years or older and received inpatient care between 2006 and 2015 at King Chulalongkorn Memorial Hospital. A total of 213 patients fulfilled the inclusion criteria. Streptococcus spp...
October 31, 2016: Japanese Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27795377/molecular-bases-determining-daptomycin-resistance-mediated-re-sensitization-to-%C3%AE-lactams-see-saw-effect-in-mrsa
#13
Adriana M Renzoni, William L Kelley, Roberto R Rosato, Maria P Martinez, Melanie Roch, Maryam Fatouraei, Daniel P Haeusser, William Margolin, Samuel Fenn, Robert D Turner, Simon J Foster, Adriana E Rosato
Antimicrobial resistance is recognized as one of the principal threats to public health worldwide, yet the problem is increasing. Methicillin-resistant Staphylococcus aureus (MRSA) are among the most difficult to treat in clinical settings due to the resistance to nearly all available antibiotics. The cyclic anionic lipopeptide antibiotic Daptomycin (DAP) is the clinical mainstay of anti-MRSA therapy. Decreased susceptibility to DAP (DAPR) reported in MRSA is frequently accompanied with a paradoxical decrease in β-lactam resistance, a process known as the "see-saw" effect...
October 24, 2016: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27790436/surgical-site-infection-by-methicillin-resistant-staphylococcus-aureus-on-decline
#14
Susmita Bhattacharya, Kuhu Pal, Sonia Jain, Shiv Sekhar Chatterjee, Jayashree Konar
INTRODUCTION: Surgical Site Infection (SSI) is the most common healthcare associated infection that could be averted by antibiotics prophylaxis against the probable offending organisms. As Staphylococcus aureus has been playing a substantial role in the aetiology of SSIs, Methicillin Resistant Staphylococcus aureus (MRSA) happens to be a problem while dealing with the postoperative wound infection. AIM: To determine the prevalence of SSI caused by MRSA and the antibiotic sensitivity pattern of MRSA...
September 2016: Journal of Clinical and Diagnostic Research: JCDR
https://www.readbyqxmd.com/read/27771092/antimicrobial-susceptibility-virulence-genes-and-randomly-amplified-polymorphic-dna-analysis-of-staphylococcus-aureus-recovered-from-bovine-mastitis-in-ningxia-china
#15
Dong Wang, Limei Zhang, Xuezhang Zhou, Yulong He, Changfu Yong, Mingliang Shen, Otto Szenci, Bo Han
Staphylococcus aureus is the leading pathogen involved in bovine mastitis, but knowledge about antimicrobial resistance, virulence factors, and genotypes of Staphylococcus aureus resulting in bovine mastitis in Ningxia, China, is limited. Therefore, antimicrobial susceptibility, virulence gene, and randomly amplified polymorphic DNA (RAPD) analyses of Staph. aureus were carried out. A total of 327 milk samples from cows with clinical and subclinical mastitis in 4 regions of Ningxia were used for the isolation and identification of pathogens according to phenotypic and molecular characteristics...
October 19, 2016: Journal of Dairy Science
https://www.readbyqxmd.com/read/27762078/phenotypic-resistance-to-disinfectants-and-antibiotics-in-methicillin-resistant-staphylococcus-aureus-strains-isolated-from-pigs
#16
E Espigares, E Moreno Roldan, M Espigares, R Abreu, B Castro, A L Dib, Á Arias
The aim of this research was to study the phenotypic resistances to disinfectants and antibiotics in strains of methicillin-resistant Staphylococcus aureus (MRSA) obtained from Canary black pigs. Analyses were performed on 54 strains of MRSA, isolated in Canary black pigs from the province of Tenerife (Spain); all of them carried the mecA gene. The strains were isolated by means of nasal swab samples of healthy pigs, collected under veterinarian supervision. Bactericidal activity of antiseptics and disinfectants was tested by means of the dilution-neutralization method...
October 20, 2016: Zoonoses and Public Health
https://www.readbyqxmd.com/read/27754770/molecular-and-phenotypic-characterization-revealed-high-prevalence-of-multidrug-resistant-methicillin-susceptible-staphylococcus-aureus-in-chongqing-southwestern-china
#17
Yancheng Yang, Zhen Hu, Weilong Shang, Qiwen Hu, Junmin Zhu, Jie Yang, Huagang Peng, Xiaopeng Zhang, Hui Liu, Yanguang Cong, Shu Li, Xiaomei Hu, Renjie Zhou, Xiancai Rao
Methicillin-susceptible Staphylococcus aureus (MSSA) accounts for ∼40% of staphylococcal infections in China. However, the molecular characterization of MSSA is not well described. In this study, 124 MSSA strains collected in 2013 from a comprehensive teaching hospital in Chongqing, Southwestern China, were subjected to antibiotics susceptibility testing and molecular typing, including multilocus sequence typing, staphylococcal protein A (spa) gene typing, accessory gene regulator (agr) typing, pulsed-field gel electrophoresis (PFGE) typing, Panton-Valentine leukocidin (pvl) gene detection, and antibiotic-resistant gene detection...
October 18, 2016: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/27744479/rapid-determination-of-%C3%AE-lactam-antimicrobial-resistance-in-bacteria-by-a-liquid-chromatography-mass-spectrometry-based-method
#18
JeongWoo Kang, Md Akil Hossain, Hae-Chul Park, Yangho Jang, Seonhwa Kim, Jae Young Song, Kwang-Jick Lee, Tae-Wan Kim
Conventional antimicrobial susceptibility tests (ASTs) are very time consuming and insufficiently precise to promptly select a proper antimicrobial treatment. This difficulty disrupts the management of infections and exacerbates the development of antimicrobial resistance. Generally, antimicrobial resistance involves the chemical modification of an antimicrobial compound to an inactive form by an enzyme released by bacteria. This modification causes a structural change and is followed by a characteristic mass shift of the antimicrobials...
November 2016: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/27721280/in-vitro-activity-of-ceftaroline-a-novel-antibiotic-against-methicillin-resistant-staphylococcus-aureus
#19
Vaishali Gaikwad, Tejash Gohel, Shrijeet Panickar, Vijay Chincholkar, Santosh Mangalkar
INTRODUCTION: Staphylococcus is one of the most common causes of nosocomial infection, especially pneumonia, surgical site infections, blood stream infections, and continues to be a major cause of community-acquired infections. The emergence of penicillin resistance followed by the development and spread of strains resistant to the semisynthetic penicillins such as methicillin, oxacillin and nafcillin, macrolides, tetracycline, and aminoglycosides has made the treatment of staphylococcal infection a global challenge...
October 2016: Indian Journal of Pathology & Microbiology
https://www.readbyqxmd.com/read/27694725/biofilm-forming-and-antimicrobial-resistance-traits-of-staphylococci-isolated-from-goat-dairy-plants
#20
Myrella Cariry Lira, Paricia Emília Naves Givisiez, Francisca Geovânia Canafístula De Sousa, Marciane Magnani, Evandro Leite De Souza, Denis Augusto Spricigo, Wondwossen Abebe Gebreyes, Celso José Bruno De Oliveira
INTRODUCTION: Biofilm-associated antimicrobial resistance is of increasing importance to the maintenance and spread of foodborne pathogens in the food industry. This study aimed to investigate the ability to form biofilm and the antimicrobial resistance of staphylococci contaminating small-scale goat milk dairy plants. METHODOLOGY: Sixty isolates were tested for antimicrobial resistance against 20 drugs by the microdilution method. Biofilm-forming traits were assessed by the microtiter plate method (MtP), Congo red agar method (CRA), and icaD gene detection by polymerase chain reaction (PCR)...
September 30, 2016: Journal of Infection in Developing Countries
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