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Penicillin susceptible staphylococcus

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https://www.readbyqxmd.com/read/28072493/patterns-of-infections-aetiological-agents-and-antimicrobial-resistance-at-a-tertiary-care-hospital-in-northern-tanzania
#1
Happiness Houka Kumburu, Tolbert Sonda, Blandina Theophil Mmbaga, Michael Alifrangis, Ole Lund, Gibson Kibiki, Frank M Aarestrup
OBJECTIVE: To determine the causative agents of infections and their antimicrobial susceptibility at a tertiary care hospital in Moshi, Tanzania, to guide optimal treatment. METHODS: A total of 590 specimens (stool (56), sputum (122), blood (126) and wound swabs (286)) were collected from 575 patients admitted in the medical and surgical departments. The bacterial species were determined by conventional methods and disk diffusion was used to determine the antimicrobial susceptibility pattern of the bacteria isolates...
January 10, 2017: Tropical Medicine & International Health: TM & IH
https://www.readbyqxmd.com/read/28056831/nasal-carriage-of-methicillin-resistant-staphylococcus-aureus-among-health-care-workers-at-al-shifa-hospital-in-gaza-strip
#2
Nabil Abdullah El Aila, Nahed Ali Al Laham, Basim Mohammad Ayesh
BACKGROUND: Nasal carriage of Staphylococcus aureus among hospital personnel is a common cause of hospital acquired infections. Emergence of drug resistant strains especially methicillin resistant S. aureus (MRSA) is a serious problem in hospital environment. Therefore, the aim of this study was to determine the nasal carriage rate of S. aureus and MRSA among Health Care Workers (HCWs) at Al Shifa Hospital, the major hospital in Gaza Strip. METHODS: A cross sectional study was conducted on 200 HCWs...
January 5, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28039666/use-of-ceftaroline-fosamil-in-children-review-of-current-knowledge-and-its-application
#3
REVIEW
Juwon Yim, Leah M Molloy, Jason G Newland
Ceftaroline is a novel cephalosporin recently approved in children for treatment of acute bacterial skin and soft tissue infections and community-acquired bacterial pneumonia (CABP) caused by methicillin-resistant Staphylococcus aureus, Streptococcus pneumoniae and other susceptible bacteria. With a favorable tolerability profile and efficacy proven in pediatric patients and excellent in vitro activity against resistant Gram-positive and Gram-negative bacteria, ceftaroline may serve as a therapeutic option for polymicrobial infections, CABP caused by penicillin- and ceftriaxone-resistant S...
December 30, 2016: Infectious Diseases and Therapy
https://www.readbyqxmd.com/read/28035690/%C3%AE-lactam-therapy-for-methicillin-susceptible-staphylococcus-aureus-bacteremia-a-comparative-review-of-cefazolin-versus-antistaphylococcal-penicillins
#4
Julius Li, Kelly L Echevarria, Kristi A Traugott
Methicillin-susceptible Staphylococcus aureus (MSSA) bacteremia is associated with high morbidity and mortality. Traditionally, antistaphylococcal penicillins (ASPs) have been considered the agents of choice for the treatment of MSSA bacteremia. Vancomycin has been demonstrated to have poorer outcomes in several studies and is only recommended for patients with severe penicillin allergies. Although cefazolin is considered as an alternative to the ASPs for patients with nonsevere penicillin allergies, cefazolin offers several pharmacologic advantages over ASPs, such as more convenient dosing regimens, and antimicrobial stewardship programs are increasingly using cefazolin as the preferential agent for MSSA infections as part of cost-saving initiatives...
December 30, 2016: Pharmacotherapy
https://www.readbyqxmd.com/read/27999423/characterization-of-community-associated-staphylococcus-aureus-from-skin-and-soft-tissue-infections-a-multicenter-study-in-china
#5
Ying Liu, Zhe Xu, Zhou Yang, Juan Sun, Lin Ma
We evaluated the epidemiological and molecular features of community-associated methicillin-resistant Staphylococcus aureus (CA-MRSA) and methicillin-sensitive S. aureus (MSSA) from children and adult patients with skin and soft-tissue infections (SSTIs) in China. Prospective community-acquired S. aureus SSTI surveillance was conducted in 23 hospitals over a 24-month period. Susceptibility to 16 antimicrobials was evaluated using the agar dilution method. StatApriori was used to determine statistically significant association trends...
December 21, 2016: Emerging Microbes & Infections
https://www.readbyqxmd.com/read/27994923/microbiological-features-of-upper-respiratory-tract-infections-in-bulgarian-children-for-the-period-1998-2014
#6
Raina Tzvetanova Gergova, Guergana Petrova, Stefan Gergov, Petko Minchev, Ivan Mitov, Tanya Strateva
BACKGROUND: Across the globe, upper respiratory tract infections (URTIs) are the most prevalent cause of morbidity in childhood. AIMS: The aim of our study is to analyze the incidence and etiology of bacterial URTIs in Bulgarian children, as well as the increasing antimicrobial resistance to the most common etiologic agents over a period of 17 years. STUDY DESIGN: Retrospective study. METHODS: The study material comprised the data from 4768 patients (aged 1-16 years) with URTI during the period from 1998-2014...
November 2016: Balkan Medical Journal
https://www.readbyqxmd.com/read/27927926/clinical-and-microbiological-aspects-of-%C3%AE-lactam-resistance-in-staphylococcus-lugdunensis
#7
Ian H McHardy, Jennifer Veltman, Janet Hindler, Katia Bruxvoort, Marissa M Carvalho, Romney M Humphries
Antimicrobial susceptibility results from broth microdilution MIC testing of 993 S. lugdunensis isolates recovered from patients at a tertiary care medical center from 2008-2015 were reviewed. Ninety-two oxacillin-susceptible isolates were selected to assess the accuracy of penicillin MIC, penicillin disk diffusion and three β-lactamase tests, including the cefoxitin-induced nitrocefin test, penicillin cloverleaf assay and penicillin disk zone-edge test. Results of all phenotypic tests were compared to blaZ PCR...
December 7, 2016: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/27920760/prevalence-of-the-antibiotic-resistance-genes-in-coagulase-positive-and-negative-staphylococcus-in-chicken-meat-retailed-to-consumers
#8
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
#9
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...
January 2017: 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
#10
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 intervention to improve time to optimal therapy for methicillin-susceptible and methicillin-resistant S. aureus isolates. Our results demonstrate significantly improved time to optimal therapy and support the use of a PBP2a assay as part of an programme for all healthcare facilities, especially those with limited resources...
December 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
#11
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
#12
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 26, 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
#13
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...
January 2017: 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
#14
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...
January 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/27862322/staphylococcus-aureus-isolated-from-tonsillectomized-adult-patients-with-recurrent-tonsillitis
#15
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...
January 2017: APMIS: Acta Pathologica, Microbiologica, et Immunologica Scandinavica
https://www.readbyqxmd.com/read/27805525/microbiologic-investigation-of-patients-before-living-donor-liver-transplant
#16
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...
2016: Experimental and Clinical Transplantation
https://www.readbyqxmd.com/read/27805513/microbiologic-monitoring-of-kidney-transplant-recipients-before-transplant
#17
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...
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
#18
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...
December 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
#19
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-resensitization-to-%C3%AE-lactams-seesaw-effect-in-methicillin-resistant-staphylococcus-aureus
#20
Adriana 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. Infections caused by methicillin-resistant Staphylococcus aureus (MRSA) strains are among the most difficult to treat in clinical settings due to the resistance of MRSA to nearly all available antibiotics. The cyclic anionic lipopeptide antibiotic daptomycin (DAP) is the clinical mainstay of anti-MRSA therapy. The decreased susceptibility to DAP (DAP resistance [DAP(r)]) reported in MRSA is frequently accompanied by a paradoxical decrease in β-lactam resistance, a process known as the "seesaw effect...
January 2017: Antimicrobial Agents and Chemotherapy
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