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Macrolide AND pneumonia

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https://www.readbyqxmd.com/read/28648859/ceftriaxone-versus-ceftriaxone-plus-a-macrolide-for-community-acquired-pneumonia-in-hospitalized-patients-with-hiv-aids-a-randomized-controlled-trial
#1
Claudia Figueiredo-Mello, Pontus Naucler, Marinella D Negra, Anna S Levin
OBJECTIVES: Evaluate if treatment with ceftriaxone and a macrolide, improved patient outcome when compared with monotherapy with ceftriaxone, in hospitalized patients with HIV/AIDS with community-acquired pneumonia (CAP). METHODS: Adult patients with HIV hospitalized due to suspected CAP were randomized to receive one of two regimens, ceftriaxone plus macrolide or ceftriaxone plus placebo, at a 1:1 proportion (Brazilian Clinical Trials Registry: RBR-8wtq2b). The primary outcome was in-hospital mortality and the secondary outcomes were mortality within 14 days, need for vasoactive drugs, need for mechanical ventilation, time to clinical stability and length of hospitalization...
June 22, 2017: Clinical Microbiology and Infection
https://www.readbyqxmd.com/read/28646969/things-that-could-be-mycoplasma-pneumoniae
#2
Ruben C A de Groot, Patrick M Meyer Sauteur, Wendy W J Unger, Annemarie M C van Rossum
M. pneumoniae infection gives rise to a wide variety of manifestations. The pathogenesis of secondary manifestations is not always known. Some depend on the direct invasion of M. pneumoniae and others on the indirect effect of M. pneumoniae through pathological immune responses, for instance autoreactive antibodies in Guillain-Barré Syndrome. Diagnosis remains challenging with currently available diagnostic tests, because they do not demonstrate a causal relation due to M. pneumoniae asymptomatic carriage or previous infection...
June 2017: Journal of Infection
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/28625123/role-of-the-n-acetylation-polymorphism-in-solithromycin-metabolism
#4
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/28620316/incidence-and-antimicrobial-sensitivity-profiles-of-normal-conjunctiva-bacterial-flora-in-the-central-area-of-china-a-hospital-based-study
#5
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/28617807/treatment-with-macrolides-and-glucocorticosteroids-in-severe-community-acquired-pneumonia-a-post-hoc-exploratory-analysis-of-a-randomized-controlled-trial
#6
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/28599867/macrolide-therapy-for-community-acquired-pneumonia-due-to-atypical-pathogens-outcomes-assessment-at-an-early-time-point
#7
Thomas M File, Paul B Eckburg, George H Talbot, Lily Llorens, H David Friedland
BACKGROUND: Therapy directed against atypical pathogens in patients with community-acquired pneumonia (CAP) is often recommended. This post-hoc analysis evaluated the effect of addition of a macrolide to ceftaroline fosamil or ceftriaxone treatment in atypical CAP. METHODS: Two phase 3, double-blind, comparative safety and efficacy studies of ceftaroline fosamil vs. ceftriaxone, FOCUS 1 and FOCUS 2, enrolled adults with CAP. Only FOCUS 1 included 24-h adjunctive clarithromycin therapy for all patients on day 1...
June 6, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28592978/prevalence-and-clinical-manifestations-of-macrolide-resistant-mycoplasma-pneumoniae-pneumonia-in-korean-children
#8
Eun Lee, Hyun-Ju Cho, Soo-Jong Hong, Jina Lee, Heungsup Sung, Jinho Yu
PURPOSE: Macrolide resistance rate of Mycoplasma pneumoniae has rapidly increased in children. Studies on the clinical features between macrolide susceptible-M. pneumoniae (MSMP) and macrolide resistant-M. pneumoniae (MRMP) are lacking. The aim of this study was to identify the macrolide resistance rate of M. pneumoniae in Korean children with M. pneumoniae penupmonia in 2015 and compare manifestations between MSMP and MRMP. METHODS: Among 122 children (0-18 years old) diagnosed with M...
May 2017: Korean Journal of Pediatrics
https://www.readbyqxmd.com/read/28592263/radiologic-findings-as-a-determinant-and-no-effect-of-macrolide-resistance-on-clinical-course-of-mycoplasma-pneumoniae-pneumonia
#9
In Ae Yoon, Ki Bae Hong, Hoan Jong Lee, Ki Wook Yun, Ji Young Park, Young Hoon Choi, Woo Sun Kim, Hyunju Lee, Byung Wook Eun, Young Min Ahn, Eun Young Cho, Hwa Jin Cho, Eun Hwa Choi
BACKGROUND: With the emergence of macrolide resistance, concerns about the efficacy of macrolides for the treatment of Mycoplasma pneumoniae (MP) pneumonia in children have been raised. This study aimed to determine the effect of macrolide resistance on the outcome of children who were hospitalized with MP pneumonia. METHODS: Between 2010 and 2015, we performed culture of MP from nasopharyngeal samples obtained from children who were hospitalized with pneumonia at five hospitals in Korea...
June 7, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28579455/killing-kinetics-of-minocycline-doxycycline-and-tosufloxacin-against-macrolide-resistant-mycoplasma-pneumoniae
#10
Miyuki Morozumi, Takafumi Okada, Takeshi Tajima, Kimiko Ubukata, Satoshi Iwata
Macrolide-resistant Mycoplasma pneumoniae (MRMP) has emerged and is increasing worldwide. In a 2011 outbreak of MRMP infections in Japan, symptoms failed to improve in many patients who initially received macrolides; the therapeutic agent was then changed to minocycline (MIN), doxycycline (DOX) or tosufloxacin (TFX). In this study, the bactericidal effects of these three agents against MRMP were evaluated. Time-kill kinetics against MRMP and macrolide-susceptible M. pneumoniae (MSMP) were determined over 5 days at concentrations corresponding to the respective minimum inhibitory concentration (MIC) and 2× MIC, i...
June 1, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28579350/azithromycin-modulates-3-5-cyclic-diguanylic-acid-signaling-in-pseudomonas-aeruginosa
#11
Soichiro Kimura, Nobuaki Mori, Toshihiro Kai, Yoshikazu Ishii, Keizo Yamaguchi, Kazuhiro Tateda
Macrolides have been reported to exert a variety of effects on both host immunomodulation and repression of bacterial pathogenicity. In this study, we report that the 3',5'-cyclic diguanylic acid (c-di-GMP) signaling system, which regulates virulence in Pseudomonas aeruginosa, is affected by the macrolide azithromycin. Using DNA microarray analysis, we selected a gene encoding PA2567 related to c-di-GMP metabolism that was significantly affected by azithromycin treatment. Expression of the PA2567 gene was significantly repressed by azithromycin in a time- and dose-dependent manner, whereas no difference in PA2567 gene expression was observed in the absence of azithromycin...
June 1, 2017: Journal of Infection and Chemotherapy: Official Journal of the Japan Society of Chemotherapy
https://www.readbyqxmd.com/read/28576117/clinical-failure-with-and-without-empiric-atypical-bacteria-coverage-in-hospitalized-adults-with-community-acquired-pneumonia-a-systematic-review-and-meta-analysis
#12
Khalid Eljaaly, Samah Alshehri, Ahmed Aljabri, Ivo Abraham, Mayar Al Mohajer, Andre C Kalil, David E Nix
BACKGROUND: Both typical and atypical bacteria can cause community-acquired pneumonia (CAP); however, the need for empiric atypical coverage remains controversial. Our objective was to evaluate the impact of antibiotic regimens with atypical coverage (a fluoroquinolone or combination of a macrolide/doxycycline with a β-lactam) to a regimen without atypical antibiotic coverage (β-lactam monotherapy) on rates of clinical failure (primary endpoint), mortality, bacteriologic failure, and adverse events, (secondary endpoints)...
June 2, 2017: BMC Infectious Diseases
https://www.readbyqxmd.com/read/28575064/antimicrobial-resistance-of-klebsiella-pneumoniae-stool-isolates-circulating-in-kenya
#13
Chris Rowe Taitt, Tomasz A Leski, Daniel P Erwin, Elizabeth A Odundo, Nancy C Kipkemoi, Janet N Ndonye, Ronald K Kirera, Abigael N Ombogo, Judd L Walson, Patricia B Pavlinac, Christine Hulseberg, Gary J Vora
We sought to determine the genetic and phenotypic antimicrobial resistance (AMR) profiles of commensal Klebsiella spp. circulating in Kenya by testing human stool isolates of 87 K. pneumoniae and three K. oxytoca collected at eight locations. Over one-third of the isolates were resistant to ≥3 categories of antimicrobials and were considered multidrug-resistant (MDR). We then compared the resistance phenotype to the presence/absence of 238 AMR genes determined by a broad-spectrum microarray and PCR. Forty-six genes/gene families were identified conferring resistance to β-lactams (ampC/blaDHA, blaCMY/LAT, blaLEN-1, blaOKP-A/OKP-B1, blaOXA-1-like family, blaOXY-1, blaSHV, blaTEM, blaCTX-M-1 and blaCTX-M-2 families), aminoglycosides (aac(3)-III, aac(6)-Ib, aad(A1/A2), aad(A4), aph(AI), aph3/str(A), aph6/str(B), and rmtB), macrolides (mac(A), mac(B), mph(A)/mph(K)), tetracyclines (tet(A), tet(B), tet(D), tet(G)), ansamycins (arr), phenicols (catA1/cat4, floR, cmlA, cmr), fluoroquinolones (qnrS), quaternary amines (qacEΔ1), streptothricin (sat2), sulfonamides (sul1, sul2, sul3), and diaminopyrimidines (dfrA1, dfrA5, dfrA7, dfrA8, dfrA12, dfrA13/21/22/23 family, dfrA14, dfrA15, dfrA16, dfrA17)...
2017: PloS One
https://www.readbyqxmd.com/read/28566489/an-evolutionary-model-to-predict-the-frequency-of-antibiotic-resistance-under-seasonal-antibiotic-use-and-an-application-to-streptococcus-pneumoniae
#14
François Blanquart, Sonja Lehtinen, Christophe Fraser
The frequency of resistance to antibiotics in Streptococcus pneumoniae has been stable over recent decades. For example, penicillin non-susceptibility in Europe has fluctuated between 12% and 16% without any major time trend. In spite of long-term stability, resistance fluctuates over short time scales, presumably in part due to seasonal fluctuations in antibiotic prescriptions. Here, we develop a model that describes the evolution of antibiotic resistance under selection by multiple antibiotics prescribed at seasonally changing rates...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28559578/5-o-mycaminosyltylonolide-antibacterial-derivatives-design-synthesis-and-bioactivity
#15
Akihiro Sugawara, Hitomi Maruyama, Sho Shibusawa, Hidehito Matsui, Tomoyasu Hirose, Ayumi Tsutsui, Robrecht Froyman, Carolin Ludwig, Johannes Koebberling, Hideaki Hanaki, Gerd Kleefeld, Satoshi Ōmura, Toshiaki Sunazuka
Tylosin is a 16-membered macrolide broad-spectrum antibiotic that has an important role in veterinary medicine, active against Gram-positive and a restricted range of Gram-negative bacteria. We synthesized 15 types of tylosin-related derivatives by chemical modification and evaluated them against mastitis pathogens. Among them, 20-deoxy-20-{N-methyl-N-[1-(3-quinolyl)-1H-1,2,3-triazol-4-yl]methylamino}-5-O-mycaminosyltylonolide 2f and 20-deoxy-20-{N-benzyl-N-[1-(3-quinolyl)-1H-1,2,3-triazol-4-yl]methylamino}-5-O-mycaminosyltylonolide 2k were found to not only expand their antibacterial impact to include Gram-negative bacteria, such as Escherichia coli and Klebsiella pneumoniae, but also to retain or increase antibacterial activity against Gram-positive bacteria, such as Staphylococcus aureus and Streptococcus uberis in comparison with the parent tylosin...
May 31, 2017: Journal of Antibiotics
https://www.readbyqxmd.com/read/28549490/whole-genome-analysis-reveals-new-insights-into-macrolide-resistance-in-mycoplasma-pneumoniae
#16
Shao Li Li, Hong Mei Sun, Bao Li Zhu, Fei Liu, Han Qing Zhao
OBJECTIVE: Mutations in 23S rRNA gene are known to be associated with macrolide resistance in Mycoplasma pneumoniae (M. pneumoniae). However, these mutations alone do not fully explain the high resistance rates in Asia. The aim of this study was to investigate other possible mutations involved in macrolide resistance in M. pneumoniae. METHODS: The whole genomes of 10 clinical isolates of M. pneumoniae with macrolide resistance were sequenced by Illumina HiSeq2000 platform...
May 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/28539503/mycoplasma-pneumoniae-from-the-respiratory-tract-and-beyond
#17
REVIEW
Ken B Waites, Li Xiao, Yang Liu, Mitchell F Balish, T Prescott Atkinson
Mycoplasma pneumoniae is an important cause of respiratory tract infections in children as well as adults that can range in severity from mild to life-threatening. Over the past several years there has been much new information published concerning infections caused by this organism. New molecular-based tests for M. pneumoniae detection are now commercially available in the United States, and advances in molecular typing systems have enhanced understanding of the epidemiology of infections. More strains have had their entire genome sequences published, providing additional insights into pathogenic mechanisms...
July 2017: Clinical Microbiology Reviews
https://www.readbyqxmd.com/read/28526836/characterisation-of-antibiotic-prescriptions-for-acute-respiratory-tract-infections-in-danish-general-practice-a-retrospective-registry-based-cohort-study
#18
Rune Aabenhus, Malene Plejdrup Hansen, Laura Trolle Saust, Lars Bjerrum
Inappropriate use of antibiotics is contributing to the increasing rates of antimicrobial resistance. Several Danish guidelines on antibiotic prescribing for acute respiratory tract infections in general practice have been issued to promote rational prescribing of antibiotics, however it is unclear if these recommendations are followed. We aimed to characterise the pattern of antibiotic prescriptions for patients diagnosed with acute respiratory tract infections, by means of electronic prescriptions, labeled with clinical indications, from Danish general practice...
May 19, 2017: NPJ Primary Care Respiratory Medicine
https://www.readbyqxmd.com/read/28526799/acquired-resistance-to-macrolides-in-pseudomonas-aeruginosa-from-cystic-fibrosis-patients
#19
Muhammad-Hariri Mustafa, Shaunak Khandekar, Michael M Tunney, J Stuart Elborn, Barbara C Kahl, Olivier Denis, Patrick Plésiat, Hamidou Traore, Paul M Tulkens, Francis Vanderbist, Françoise Van Bambeke
Cystic fibrosis (CF) patients receive chronic treatment with macrolides for their antivirulence and anti-inflammatory properties. We, however, previously showed that Pseudomonas aeruginosa, considered as naturally resistant to macrolides, becomes susceptible when tested in a eukaryotic medium rather than a conventional broth.We therefore looked for specific macrolide resistance determinants in 333 CF isolates from four European CF centres in comparison with 48 isolates from patients suffering from hospital-acquired pneumonia (HAP)...
May 2017: European Respiratory Journal: Official Journal of the European Society for Clinical Respiratory Physiology
https://www.readbyqxmd.com/read/28526018/infection-mediated-asthma-etiology-mechanisms-and-treatment-options-with-focus-on-chlamydia-pneumoniae-and-macrolides
#20
REVIEW
Wilmore C Webley, David L Hahn
Asthma is a chronic respiratory disease characterized by reversible airway obstruction and airway hyperresponsiveness to non-specific bronchoconstriction agonists as the primary underlying pathophysiology. The worldwide incidence of asthma has increased dramatically in the last 40 years. According to World Health Organization (WHO) estimates, over 300 million children and adults worldwide currently suffer from this incurable disease and 255,000 die from the disease each year. It is now well accepted that asthma is a heterogeneous syndrome and many clinical subtypes have been described...
May 19, 2017: Respiratory Research
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