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https://www.readbyqxmd.com/read/28222482/functional-reconstitution-of-the-mycobacterium-tuberculosis-long-chain-acyl-coa-carboxylase-from-multiple-acyl-coa-subunits
#1
Bernardo Bazet Lyonnet, Lautaro Diacovich, Gabriela Gago, Lucie Spina, Fabienne Bardou, Anne Lemassu, Annaïk Quémard, Hugo Gramajo
Mycobacterium tuberculosis produces a large number of structurally diverse lipids that have been implicated in the pathogenicity, persistence and antibiotic resistance of this organism. Most building blocks involved in the biosynthesis of all these lipids are generated by acyl-CoA carboxylases (ACCase) whose subunit composition and physiological roles have not yet been clearly established. A rather controversial data in the literature refers to the exact protein composition and substrate specificity of the enzyme complex that produces the long-chain α-carboxy-acyl-CoAs; one of the substrates involved in the last step of condensation mediated by the polyketide synthase Pks13 to synthesize mature mycolic acids...
February 21, 2017: FEBS Journal
https://www.readbyqxmd.com/read/28222348/effects-of-bamboo-charcoal-on-antibiotic-resistance-genes-during-chicken-manure-composting
#2
Haichao Li, Manli Duan, Jie Gu, Yajun Zhang, Xun Qian, Jun Ma, Ranran Zhang, Xiaojuan Wang
Composting is widely used for animal waste disposal, and bamboo charcoal (BC) can be used for nitrogen conservation during composting. However, the effects of BC on antibiotic resistance genes (ARGs) during chicken manure composting are still unclear. This study investigated the effects on ARGs of adding different proportions of BC (0%, 5%, 10%, and 20% w/w) to chicken manure compost. After 26 days, the relative abundances (RAs) of most ARGs (tetC, tetG, tetW, tetX, sul2, drfA1, drfA7, ermB, ermF, ermQ, and ermX) and intI1 declined by 21...
February 18, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28222277/antibiotic-prophylaxis-in-blepharoplasty-review-of-the-current-literature
#3
REVIEW
Elie M Ferneini, Steven Halepas, Steven I Aronin
The purpose of this study was to provide an evidence-based overview of antibiotic prophylaxis in blepharoplasty. We performed a literature search that evaluated the risk of infection associated with blepharoplasty, as well as the risks and benefits of antibiotic prophylaxis. The overall infection rate associated with eyelid surgery is extremely low. However, the use of antibiotic prophylaxis has increased over the past 25 years in esthetic facial procedures. There is no standard of care for or against antibiotic prophylaxis, and routine practices vary widely...
February 1, 2017: Journal of Oral and Maxillofacial Surgery
https://www.readbyqxmd.com/read/28222110/different-antibiotic-growth-promoters-induce-specific-changes-in-the-cecal-microbiota-membership-of-broiler-chicken
#4
Marcio C Costa, Jose A Bessegatto, Amauri A Alfieri, J Scott Weese, João A B Filho, Alexandre Oba
Antimicrobials are sometimes given to food animals at low doses in order to promote faster growth. However, the mechanisms by which those drugs improve performance are not fully understood. This study aimed to investigate the impact of zinc bacitracin (55g/ton), enramycin (10g/ton); halquinol® (30g/ton); virginiamycin (16,5g/ton) and avilamycin (10g/ton) on the cecal microbiota of broiler chicken, compared to a control group. Six hundred and twenty four chicks (Cobb 500) arriving to an experimental unit were randomly assigned into each treatment with four repetitions per treatment...
2017: PloS One
https://www.readbyqxmd.com/read/28221970/genomic-tools-for-customized-recovery-and-detection-of-foodborne-shiga-toxigenic-escherichia-coli
#5
Michael Knowles, Sara Stinson, Dominic Lambert, Catherine Carrillo, Adam Koziol, Martine Gauthier, Burton Blais
Genomic antimicrobial resistance (AMR) prediction tools have the potential to support foodborne illness outbreak investigations through their application in the analysis of bacterial genomes from causative strains. The AMR marker profile of a strain of interest, initially identified in outbreak-associated clinical samples, may serve as the basis for customization of selective enrichment media, facilitating its recovery from samples in a food safety investigation. Different possibilities for AMR analyses include the use of comprehensive AMR gene databases such as the Comprehensive Antibiotic Resistance Database, which can be mined with in-house bioinformatics alignment tools (e...
December 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221939/load-and-prevalence-of-antimicrobial-resistant-escherichia-coli-from-fresh-goat-meat-in-arusha-tanzania
#6
Gaspary Mwanyika, Douglas R Call, Benardether Rugumisa, Catherine Luanda, Rehema Murutu, Murugan Subbiah, Joram Buza
Given the potential public health risks associated with a burgeoning goat meat industry in Tanzania, we estimated the load of Escherichia coli and the prevalence of antibiotic-resistant strains for goat meat by using a cross-sectional study design (June to July 2015). Five large (n = 60 samples) and five small (n = 64 samples) slaughterhouses were sampled over a period of four to six visits each. Meat rinsate was prepared and plated onto MacConkey agar, and presumptive E. coli colonies were enumerated and reported as CFU per milliliter of rinsate...
September 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221925/genetic-diversity-and-antibiotic-resistance-of-escherichia-coli-isolates-from-different-leafy-green-production-systems
#7
Mosimanegape Jongman, Lise Korsten
Foodborne disease outbreaks linked to contaminated irrigation water and fresh produce are a public health concern. The presence of Escherichia coli isolates from irrigation water and leafy green vegetables in different food production systems (large commercial farms, small-scale farms, and homestead gardens) was investigated. The prevalence of antibiotic resistance and virulence in these isolates was further assessed, and links between water source and irrigated crops were identified using antimicrobial and genotypic analyses...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221905/efficacy-of-plant-derived-antimicrobials-in-controlling-enterohemorrhagic-escherichia-coli-virulence-in-vitro
#8
Sangeetha Ananda Baskaran, Anup Kollanoor-Johny, Meera Surendran Nair, Kumar Venkitanarayanan
Escherichia coli O157:H7 is a major foodborne pathogen that can cause serious human illness characterized by hemorrhagic diarrhea and kidney failure. The pathology of enterohemorrhagic E. coli O157:H7 (EHEC) infection is primarily mediated by verotoxins, which bind to the globotriaosylceramide receptor on host cells. Antibiotics are contraindicated for treating EHEC infection because they lead to increased verotoxin release, thereby increasing the risk of renal failure and death in patients. Thus, alternative strategies are needed for controlling EHEC infections in humans...
November 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221881/antimicrobial-resistance-and-molecular-characterization-of-extended-spectrum-%C3%AE-lactamases-and-other-escherichia-coli-isolated-from-food-of-animal-origin-and-human-intestinal-isolates
#9
Manja Krizman, Jerneja Ambrozic Avgustin, Irena Zdovc, Majda Golob, Marija Trkov, Urska Jamnikar Ciglenecki, Majda Biasizzo, Andrej Kirbis
Antibiotics have always appeared miraculous, saving innumerable lives. However, the unwise use of antimicrobial drugs has led to the appearance of resistant bacteria. The purpose of this study was to evaluate antimicrobial resistance in Escherichia coli (n =160) isolated from food of animal origin. The focus was on E. coli -producing extended-spectrum β-lactamases. E. coli was chosen because it is a part of the normal microbiota in mammals and can enter the food chain during slaughtering and food manipulation...
January 2017: Journal of Food Protection
https://www.readbyqxmd.com/read/28221851/virulence-of-trypanosoma-cruzi-in-a%C3%A3-ai-euterpe-oleraceae-martius-pulp-following-mild-heat-treatment
#10
Rodrigo Labello Barbosa, Karen Signori Pereira, Viviane Liotti Dias, Flávio Luis Schmidt, Delma Pegolo Alves, Ana Maria Aparecida Guaraldo, Luiz Augusto Corrêa Passos
Outbreaks of acute Chagas disease (ACD) in northern Brazil can be caused by the ingestion of unprocessed açai pulp contaminated with Trypanosoma cruzi . The aim of this study was to determine the minimum thermal process required to inactivate T. cruzi in açai pulp. Trypomastigotes (100,000) of T. cruzi Y strain were added to 0.15 M NaCl or açai pulp and continuously mixed while being heat treated at 37 to 49°C for up to 1 h. When necessary, parasites were separated from açai pulp by forced sieving. Inocula were administrated intraperitoneally in inbred immunodeficient C...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221841/tetracycline-resistance-patterns-of-lactobacillus-buchneri-group-strains
#11
Marlies Feichtinger, Sigrid Mayrhofer, Wolfgang Kneifel, Konrad J Domig
Lactobacilli are applied as starter cultures for controlled fermentation in the production of food and feed. Among other lactobacilli, members of the Lactobacillus buchneri group are used in fermented milk, wine, and silage. Most of the L. buchneri species used for the manufacturing of food or feed are already on the list for qualified presumption of safety status and are recommended as biological agents by the European Food Safety Authority. Consequently, new strains intended as food or feed additives do not require any additional safety check than confirming the absence of transferable antibiotic resistance determinants...
October 2016: Journal of Food Protection
https://www.readbyqxmd.com/read/28221753/structure-activity-relationships-of-the-competence-stimulating-peptides-csps-in-streptococcus-pneumoniae-reveal-motifs-critical-for-intra-group-and-cross-group-comd-receptor-activation
#12
Yifang Yang, Bimal Koirala, Lucia A Sanchez, Naiya R Phillips, Sally R Hamry, Yftah Tal-Gan
Streptococcus pneumoniae is a highly recombinogenic human pathogen that utilizes the competence stimulating peptide (CSP)-based quorum sensing (QS) circuitry to acquire antibiotic resistance genes from the environment and initiate its attack on the human host. Modulation of QS in this bacterium, either inhibition or activation, can therefore be used to attenuate S. pneumoniae infectivity and slow down pneumococcal resistance development. In this study we set to determine the molecular mechanism that drives CSP:receptor binding and identify CSP-based QS modulators with distinct activity profiles...
February 21, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28221245/an-articulating-antibiotic-cement-spacer-for-first-stage-reconstruction-for-infected-total-elbow-arthroplasty
#13
Kanishka E Williams, Simon MacLean, Jesse Jupiter, Gregory I Bain
Management of an infected total elbow replacement is a significant clinical challenge. Although preservation of the prosthesis is ideal, a 2-stage revision is often necessary. Unlike lower limb arthroplasty, antibiotic spacers are not commercially available. Monoblock cement spacers do not allow elbow movements and are therefore associated with severe stiffness and scarring, leading to poor clinical outcomes. In our paper we present a simple and novel technique for constructing an articulating antibiotic-impregnated spacer for use as an implant for a 1-stage revision of an infected elbow arthroplasty...
February 17, 2017: Techniques in Hand & Upper Extremity Surgery
https://www.readbyqxmd.com/read/28220959/evaluating-clinical-dietary-and-psychological-risk-factors-for-relapse-of-ulcerative-colitis-in-clinical-endoscopic-and-histological-remission
#14
Rajan Dhingra, Saurabh Kedia, Pratap Mouli Venigalla, Sushil Kumar, Namrata Singh, Sawan Bopanna, Vikas Singla, Bikash Narayan Choudhury, Prashant Verma, Veena Tiwari, Siddhartha Datta Gupta, Govind Makharia, Vineet Ahuja
BACKGROUND: The literature on possible factors that could trigger a relapse in patients with ulcerative colitis (UC) in clinical, endoscopic and histological remission on long term follow up is scarce. AIM: To determine the relapse rate in patients with UC in clinical, endoscopic and histological remission and identify factors that may influence the risk of relapse. METHODS: Patients with UC in clinical, endoscopic and histological remission were enrolled between January-July 2010 and followed up for 1 year to determine the effect of clinical, dietary and psychological factors on relapse...
February 21, 2017: Journal of Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28220870/long-term-use-of-ceftriaxone-sodium-induced-changes-in-gut-microbiota-and-immune-system
#15
Yanjie Guo, Xuefei Yang, Yane Qi, Shu Wen, Yinhui Liu, Shaoying Tang, Rongsheng Huang, Li Tang
Antibiotic administration, while facilitating clearance of targeted infections, also perturbs commensal microbial communities. Previous studies have all focused on the effects of short term use of antibiotics. Here, we focus on the effects of long term use of antibiotic on gut microbiota and immunity. BALB/c mice received saline or different doses of ceftriaxone sodium (100, 200 and 400 mg/mL) via daily gavage for 150 days. Alterations of fecal microbiota, small intestine histopathology, body weight, spleen index, serum IgG, mucus SIgA, IFN-γ/IL-4 ratio, CD4/CD8 ratio and CD4(+)CD25(+) cells were evaluated...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220869/nitric-oxide-is-involved-in-the-oxytetracycline-induced-suppression-of-root-growth-through-inhibiting-hydrogen-peroxide-accumulation-in-the-root-meristem
#16
Qing-Xiang Yu, Golam Jalal Ahammed, Yan-Hong Zhou, Kai Shi, Jie Zhou, Yunlong Yu, Jing-Quan Yu, Xiao-Jian Xia
Use of antibiotic-contaminated manure in crop production poses a severe threat to soil and plant health. However, few studies have studied the mechanism by which plant development is affected by antibiotics. Here, we used microscopy, flow cytometry, gene expression analysis and fluorescent dyes to study the effects of oxytetracycline (OTC), a widely used antibiotic in agriculture, on root meristem activity and the accumulation of hydrogen peroxide (H2O2) and nitric oxide (NO) in the root tips of tomato seedlings...
February 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220736/antibiotic-prescription-patterns-of-south-african-general-medical-practitioners-for-treatment-of-acute-bronchitis
#17
N B Q Ncube, G C Solanki, T Kredo, R Lalloo
BACKGROUND: Antibiotic resistance is a significant public health problem. Prudent use of antibiotics is crucial in reducing this resistance. Acute bronchitis is a common reason for consultations with general medical practitioners, and antibiotics are often prescribed even though guidelines recommend not prescribing them for uncomplicated acute bronchitis. OBJECTIVE: To analyse the antibiotic prescription patterns of South African (SA) general medical practitioners in the treatment of acute bronchitis...
January 30, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28220735/sustained-reduction-in-antibiotic-consumption-in-a-south-african-public-sector-hospital-four-year-outcomes-from-the-groote-schuur-hospital-antibiotic-stewardship-program
#18
T H Boyles, V Naicker, N Rawoot, P J Raubenheimer, B Eick, M Mendelson
BACKGROUND: Overuse of antibiotics has driven global bacterial resistance to the extent that we have entered a post-antibiotic era, where infections that were once easily treatable are now becoming untreatable. Efforts to control consumption have focused on antibiotic stewardship programmes (ASPs), aimed at optimising use. OBJECTIVE: To report antibiotic consumption and cost over 4 years from a public hospital ASP in South Africa (SA). METHODS: A comprehensive ASP comprising online education, a dedicated antibiotic prescription chart and weekly dedicated ward rounds was introduced at Groote Schuur Hospital, Cape Town, in 2012...
January 30, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28220708/epidemiology-and-antibiotic-sensitivity-of-staphylococcus-aureus-nasal-carriage-in-children-in-hungary
#19
Krisztina Laub, Adrienn Tóthpál, Szilvia Kardos, Orsolya Dobay
The aim of this study was to assess the Staphylococcus aureus nasal carriage rate in healthy children all over Hungary and to specify some risk factors, the antibiotic resistance patterns of the bacteria, and their genetic relatedness. In total, 878 children (aged 3-6 years) were screened at 21 day-care centers in 16 different cities in Hungary, between February 2009 and December 2011. Samples taken from both nostrils were cultured on blood agar, and suspected S. aureus isolates were identified by β-hemolysis, catalase positivity, clump test, and nucA PCR...
February 21, 2017: Acta Microbiologica et Immunologica Hungarica
https://www.readbyqxmd.com/read/28220628/the-role-of-nicotinamide-in-acne-treatment
#20
REVIEW
Frances M Walocko, Ariel E Eber, Jonette E Keri, Mana A Al-Harbi, Keyvan Nouri
Safe and effective treatment options for acne vulgaris are needed to address side effects and increasing rates of antibiotic resistance from current treatments. Nicotinamide is a vitamin with potent anti-inflammatory properties that could offer a potential treatment option. We aim to summarize the relevant literature on the role of nicotinamide in acne vulgaris and discuss the next steps necessary to move this approach into clinical practice. We searched PubMed for clinical studies using nicotinamide for treatment of acne vulgaris...
February 21, 2017: Dermatologic Therapy
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