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https://www.readbyqxmd.com/read/28642756/high-prevalence-of-macrolide-resistance-and-molecular-characterization-of-streptococcus-pyogenes-isolates-circulating-in-china-from-2009-to-2016
#1
Binghuai Lu, Yujie Fang, Yanyan Fan, Xingchun Chen, Junrui Wang, Ji Zeng, Yi Li, Zhijun Zhang, Lei Huang, Hongxia Li, Dong Li, Fengxia Zhu, Yanchao Cui, Duochun Wang
Streptococcus pyogenes, or group A Streptococcus, is a pathogen responsible for a wide range of clinical manifestations, from mild skin and soft tissue infections and pharyngitis to severe diseases. Its epidemiological characteristics should be comprehensively under surveillance for regulating the national prevention and treatment practice. Herein, a total of 140 S. pyogenes, including 38 invasive and 102 noninvasive isolates, were collected from infected patients in 10 tertiary general hospitals from 7 cities/provinces in China during the years 2009-2016...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28640123/recurrent-campylobacter-jejuni-bacteremia-in-a-patient-with-hypogammaglobulinemia-a-case-report
#2
Youie Kim, Ju Ae Shin, Seung Beom Han, Bin Cho, Dae Chul Jeong, Jin Han Kang
RATIONALE: Although some cases of recurrent bacteremia due to Campylobacter jejuni have been reported in immunocompromised patients, antibiotic treatment strategies to eradicate C. jejuni and prevent recurrent infections in immunocompromised patients have not been established. Authors' experience of such rare cases should be shared for improving patients' outcomes. PATIENT CONCERNS: An 18-year-old boy with hypogammaglobulinemia, who received intravenous immunoglobulin replacement therapy every 3 weeks, was admitted to hospital repeatedly due to recurrent diarrhea and cellulitis of the leg...
June 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28639230/intracellular-pharmacokinetics-of-antibacterials-and-their-clinical-implications
#3
REVIEW
Federico Pea
The intracellular pharmacokinetics of the different classes of antimicrobials into surrogate markers of tissue accumulation (alveolar macrophages and/or total alveolar cells collected by means of bronchoalveolar lavage or peripheral white blood cells) was reviewed. The aim of this review was to discuss the clinical implications of the intracellular pharmacokinetics of antibacterials, either from the therapeutic or toxicological perspective. The different pharmacokinetic behaviour of antimicrobials within cells is mainly related to their physicochemical properties (hydrophilicity and lipophilicity), and may have several clinical implications...
June 21, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28638254/inflammation-and-oxidation-biomarkers-in-patients-with-cystic-fibrosis-the-influence-of-azithromycin
#4
Casilda Olveira, Alicia Padilla, Antonio Dorado, Victoria Contreras, Eduardo Garcia-Fuentes, Elehazara Rubio-Martin, Nuria Porras, Esperanza Doña, Ana Carmona, Gabriel Olveira
OBJECTIVE: In addition to their antibiotic effect, macrolides appear to modulate the inflammatory response in cystic fibrosis (CF) and could influence oxidative stress. The objective of this study was to assess oxidation biomarkers and levels of inflammation and to determine whether there is an association between these parameters and the intake of macrolides. MATERIALS AND METHODS: The subjects included in this cross-sectional study were, on the one hand, clinically stable patients with CF and, on the other, healthy controls...
June 2017: Eurasian Journal of Medicine
https://www.readbyqxmd.com/read/28629878/campylobacter-bacteremia-in-london-a-44-year-single-center-study
#5
Geraldine A O'Hara, Joseph R A Fitchett, John L Klein
PURPOSE: Campylobacter species are a well-recognized but rare cause of bloodstream infection. METHODS: Here we reviewed 41 cases of Campylobacter bloodstream infection occurring at a single center in London over 44years, comprising 0.2% of all recorded episodes during this time period. RESULTS: Patients had a mean age of 46years and, contrasting with previous reports, nearly 50% of our patients did not have significant comorbidities. Ciprofloxacin resistance increased over the study period with 35% of isolates overall being resistant compared with only 3% exhibiting macrolide resistance...
June 2, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28629448/azithromycin-for-idiopathic-acute-exacerbation-of-idiopathic-pulmonary-fibrosis-a-retrospective-single-center-study
#6
Kodai Kawamura, Kazuya Ichikado, Yuko Yasuda, Keisuke Anan, Moritaka Suga
BACKGROUND: Acute exacerbation (AE) of idiopathic pulmonary fibrosis (IPF) is a fatal condition without an established pharmaceutical treatment. Most patients are treated with high-dose corticosteroids and broad-spectrum antibiotics. Azithromycin is a macrolide with immunomodulatory activity and may be beneficial for treatment of acute lung injury. The objective of this study was to determine the effect of azithromycin on survival of patients with idiopathic AE of IPF. METHODS: We evaluated 85 consecutive patients hospitalized in our department for idiopathic AE of IPF from April 2005 to August 2016...
June 19, 2017: BMC Pulmonary Medicine
https://www.readbyqxmd.com/read/28628813/removal-of-antibiotics-during-the-anaerobic-digestion-of-pig-manure
#7
Lu Feng, Mònica Escolà Casas, Lars Ditlev Mørck Ottosen, Henrik Bjarne Møller, Kai Bester
Antibiotics are frequently used in animals to treat sickness and prevent infection especially in industrial meat production. Some of the antibiotics cannot be completely metabolized and, as an unavoidable result, are excreted and thus end up in manure which is then spread in the environment. Currently increasing amounts of manure is used in biogas production before spreading the residuals on agricultural fields. In this study, the removal patterns of sulfonamides (sulfadiazine, sulfamethizole, sulfamethoxazole) and macrolides (clarithromycin, erythromycin), as well as trimethoprim, were investigated during the anaerobic digestion of pig manure...
June 16, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28628752/high-prevalence-of-resistance-to-fluoroquinolones-and-tetracycline-campylobacter-spp-isolated-from-poultry-in-poland
#8
Anna Woźniak-Biel, Gabriela Bugla-Płoskońska, Alicja Kielsznia, Kamila Korzekwa, Anna Tobiasz, Agnieszka Korzeniowska-Kowal, Alina Wieliczko
Campylobacter spp. is a major cause of foodborne diseases in humans, particularly when transmitted by the handling or consumption of undercooked poultry meat. Most Campylobacter infections are self-limiting, but antimicrobial treatment (e.g., fluoroquinolones and macrolides) is necessary in severe or prolonged cases. The indiscriminate use of these drugs, both in clinical medicine and animal production, has a major impact on public health. The aim of the present study was to identify Campylobacter strains, isolated from turkey and broilers, using both PCR and the matrix-assisted laser desorption-ionization time-of-flight (MALDI-TOF) methods to reveal the accuracy of identification, as well to evaluate the antimicrobial and genetic resistance of the investigated strains...
June 19, 2017: Microbial Drug Resistance: MDR: Mechanisms, Epidemiology, and Disease
https://www.readbyqxmd.com/read/28625995/novel-antibiotic-resistance-determinants-from-agricultural-soil-exposed-to-antibiotics-widely-used-in-human-medicine-and-animal-farming
#9
Calvin Ho-Fung Lau, Kalene van Engelen, Stephen Gordon, Justin Renaud, Edward Topp
Antibiotic resistance has emerged globally as one of the biggest threats to human and animal health. Although the excessive use of antibiotics is recognized for accelerating the selection for resistance, there is a growing body of evidence suggesting that natural environments are "hotspots" for the development of both ancient and contemporary resistance mechanisms. Given that pharmaceuticals can be entrained onto agricultural land through anthropogenic activities, this could be a potential driver for the emergence and dissemination of resistance in soil bacteria...
June 16, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28625676/comprehensive-determination-of-macrolide-antibiotics-their-synthesis-intermediates-and-transformation-products-in-wastewater-effluents-and-ambient-waters-by-liquid-chromatography-tandem-mass-spectrometry
#10
Ivan Senta, Ivona Krizman-Matasic, Senka Terzic, Marijan Ahel
Macrolide antibiotics are a prominent group of emerging contaminants frequently found in wastewater effluents and wastewater-impacted aquatic environments. In this work, a novel analytical method for simultaneous determination of parent macrolide antibiotics (azithromycin, erythromycin, clarithromycin and roxithromycin), along with their synthesis intermediates, byproducts, metabolites and transformation products in wastewater and surface water was developed and validated. Samples were enriched using solid-phase extraction on Oasis HLB cartridges and analyzed by reversed-phase liquid chromatography coupled to electrospray ionization tandem mass spectrometry...
June 3, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28625127/the-hippocampal-autophagic-machinery-is-depressed-in-the-absence-of-the-circadian-clock-protein-per1-that-may-lead-to-vulnerability-during-cerebral-ischemia
#11
Abdelhaq Rami, Oliver Rawashdeh
BACKGROUND: Autophagy is an intracellular bulk self-degrading process in which cytoplasmic contents of abnormal proteins and excess or damaged organelles are sequestered into autophagosomes, and degraded upon fusion with lysosomes. Although autophagy is generally considered to be pro-survival, it also functions in cell death processes. We recently reported on the hippocampal higher vulnerability to cerebral ischemia in mice lacking the circadian clock protein PERIOD1 (PER1), a phenomenon we found to be linked to a PER1-dependent modulation of the expression patterns of apoptotic/autophagic markers...
June 18, 2017: Current Neurovascular Research
https://www.readbyqxmd.com/read/28625123/role-of-the-n-acetylation-polymorphism-in-solithromycin-metabolism
#12
David W Hein, Mark A Doll
AIM: Solithromycin is a new macrolide antibiotic for the potential treatment of bacterial pneumonia. MATERIALS & METHODS: Solithromycin N-acetylation by human NAT1 and NAT2 was investigated following recombinant expression in yeast and in cryopreserved human hepatocytes from rapid, intermediate and slow acetylators. RESULTS: Solithromycin exhibited over twofold higher affinity for recombinant human NAT2 than NAT1. Apparent maximum velocities for the N-acetylation of solithromycin catalyzed by the NAT2 allozyme associated with rapid acetylators were significantly (p < 0...
June 2017: Pharmacogenomics
https://www.readbyqxmd.com/read/28623856/antimicrobial-susceptibility-and-phylogenetic-analysis-of-propionibacterium-acnes-isolated-from-acne-patients-in-japan-between-2013-and-2015
#13
Keisuke Nakase, Nobukazu Hayashi, Yui Akiyama, Sae Aoki, Norihisa Noguchi
The prevalence of antimicrobial-resistant Propionibacterium acnes strains isolated from acne patients has been increasing in Japan. Here, to estimate the current resistance rate, we tested antimicrobial susceptibility among P. acnes from acne patients having visited a specialized dermatology clinic between 2013 and 2015. Rates of resistance to macrolides and clindamycin were 44.3 (31/70) and 38.6% (27/70), respectively. erm(X), which confers high-level clindamycin resistance (minimum inhibitory concentration ≥256 μg/mL), was detected in six isolates, whereas no resistance determinants were identified in eight strains showing high-level resistance to clindamycin...
June 17, 2017: Journal of Dermatology
https://www.readbyqxmd.com/read/28623550/antibiotic-susceptibility-profiles-among-campylobacter-isolates-obtained-from-international-travelers-between-2007-and-2014
#14
A Post, D Martiny, N van Waterschoot, M Hallin, U Maniewski, E Bottieau, M Van Esbroeck, E Vlieghe, S Ombelet, O Vandenberg, J Jacobs
Campylobacter infection is a common cause of diarrhea among international travelers. We studied antibiotic resistance patterns among Campylobacter isolates obtained from international travelers according to travel destination. Three collections of isolates obtained from international travelers between 2007 and 2014 (Institute of Tropical Medicine, the "Laboratoire Hospitalier Universitaire de Bruxelles "and the Belgian National Reference Centre for Campylobacter) were used. Isolates were tested for minimal inhibitory concentration (MIC) values (E-test macromethod) for fluoroquinolones, macrolides, tetracyclines, amoxicillin-clavulanic acid, and meropenem...
June 17, 2017: European Journal of Clinical Microbiology & Infectious Diseases
https://www.readbyqxmd.com/read/28622096/practical-considerations-for-managing-helicobacter-pylori-in-college-health
#15
Laura A Rhodes
OBJECTIVE: To perform a literature review assessing the management of H. pylori management in international college students. METHODS: A comprehensive literature search was conducted using the following key words: Helicobacter pylori, H pylori, student, college student, college health, treatment, guidelines, resistance, and antibiotic resistant. RESULTS: No additional literature was found that directly addresses the treatment of H. pylori infection in international college students...
June 16, 2017: Journal of American College Health: J of ACH
https://www.readbyqxmd.com/read/28620316/incidence-and-antimicrobial-sensitivity-profiles-of-normal-conjunctiva-bacterial-flora-in-the-central-area-of-china-a-hospital-based-study
#16
Hua Tao, Juan Wang, Lei Li, Hui-Zhi Zhang, Meng-Ping Chen, Le Li
Objective: To study the distribution and patterns of resistance to antimicrobial agents of normal conjunctival bacteria. Materials and Methods: Conjunctival specimens were collected from 8,224 patients and then cultured, which underwent antimicrobial susceptibility test following standard methods. Patients with infectious symptoms such as erythema or oedema and those using systemic or topical antibiotics within 1 month were excluded. Results: In this study, the incidence of isolated bacteria was 24.2%. The middle aged group of 41-65 years presented the lowest rate of bacterial isolation which was 19...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28619239/antimicrobial-susceptibility-of-haemophilus-influenzae-strains-isolated-from-the-urethra-of-men-with-acute-urethritis-and-or-epididymitis
#17
Takashi Deguchi, Shin Ito, Kyoko Hatazaki, Kengo Horie, Mitsuru Yasuda, Keita Nakane, Kosuke Mizutani, Tomohiro Tsuchiya, Shigeaki Yokoi, Nozomu Hanaoka, Ken Shimuta, Makoto Ohnishi, Tetsuro Muratani, Masahiro Nakano
We determined minimum inhibitory concentrations (MICs) of 41 antimicrobial agents for 73 clinical strains of Haemophilusinfluenzae isolated from the urethra of men with acute urethritis and/or epididymitis and examined the strains for the production of β-lactamase. We also compared their antimicrobial susceptibilities with those of H. influenzae strains from respiratory tract or otorhinolaryngological infections that were reported in Japan. The proportion of β-lactamase-nonproducing ampicillin-resistant strains from acute urethritis and/or epididymitis appeared to be lower, but that of β-lactamase-producing ampicillin-resistant strains appeared to be higher, compared with those from respiratory tract or otorhinolaryngological infections...
June 12, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28617807/treatment-with-macrolides-and-glucocorticosteroids-in-severe-community-acquired-pneumonia-a-post-hoc-exploratory-analysis-of-a-randomized-controlled-trial
#18
Adrian Ceccato, Catia Cilloniz, Otavio T Ranzani, Rosario Menendez, Carles Agusti, Albert Gabarrus, Miquel Ferrer, Oriol Sibila, Michael S Niederman, Antoni Torres
BACKGROUND: Systemic corticosteroids have anti-inflammatory effects, whereas macrolides also have immunomodulatory activity in addition to their primary antimicrobial actions. We aimed to evaluate the potential interaction effect between corticosteroids and macrolides on the systemic inflammatory response in patients with severe community-acquired pneumonia to determine if combining these two immunomodulating agents was harmful, or possibly beneficial. METHODS: We performed a post-hoc exploratory analysis of a randomized clinical trial conducted in three tertiary hospitals in Spain...
2017: PloS One
https://www.readbyqxmd.com/read/28613983/azithromycin-attenuates-myofibroblast-differentiation-and-lung-fibrosis-development-through-proteasomal-degradation-of-nox4
#19
Kazuya Tsubouchi, Jun Araya, Shunsuke Minagawa, Hiromichi Hara, Akihiro Ichikawa, Nayuta Saito, Tsukasa Kadota, Nahoko Sato, Masahiro Yoshida, Yusuke Kurita, Kenji Kobayashi, Saburo Ito, Yu Fujita, Hirofumi Utsumi, Haruhiko Yanagisawa, Mitsuo Hashimoto, Hiroshi Wakui, Yutaka Yoshii, Takeo Ishikawa, Takanori Numata, Yumi Kaneko, Hisatoshi Asano, Makoto Yamashita, Makoto Odaka, Toshiaki Morikawa, Katsutoshi Nakayama, Yoichi Nakanishi, Kazuyoshi Kuwano
Accumulation of profibrotic myofibroblasts is involved in the process of fibrosis development during idiopathic pulmonary fibrosis (IPF) pathogenesis. TGFB (transforming growth factor beta) is one of the major profibrotic cytokines for myofibroblast differentiation and NOX4 (NADPH oxidase 4) has an essential role in TGFB-mediated cell signaling. Azithromycin (AZM), a second-generation antibacterial macrolide, has a pleiotropic effect on cellular processes including proteostasis. Hence, we hypothesized that AZM may regulate NOX4 levels by modulating proteostasis machineries, resulting in inhibition of TGFB-associated lung fibrosis development...
June 14, 2017: Autophagy
https://www.readbyqxmd.com/read/28611136/a-rare-case-of-mycobacterium-abscessus-subspecies-abscessus-prosthetic-valve-endocarditis-and-the-clinical-importance-of-inducible-erm-41-gene-testing
#20
Norman Beatty, Craig Brown, Tirdad Zangeneh, Mayar Al Mohajer
A 56-year-old man with a history of injection drug use and two prior episodes of native valve infective endocarditis presented with dyspnoea on exertion. Our preliminary work-up revealed bacteraemia with reported growth of 'Mycobacterium abscessus group' on multiple blood cultures. The patient was later found to have eustachian valve and prosthetic pulmonic valve endocarditis. Initially, he responded to standard antimycobacterial therapy for rapidly growing mycobacteria (RGM) with supporting laboratory susceptibilities...
June 13, 2017: BMJ Case Reports
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