Antibiotics and Antibiotic Resistance
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Comparison of Arbekacin and Vancomycin in Treatment of Chronic Suppurative Otitis Media by Methicillin Resistant Staphylococcus Aureus
ORIGINAL ARTICLE Infectious Diseases, Microbiology & Parasitology http://dx.doi.org/10.3346/jkms.2015.30.6.688 • J Korean Med Sci 2015; 30: 688-693 Comparison of Arbekacin and Vancomycin in Treatment of Chronic Suppurative Otitis Media by Methicillin Resistant Staphylococcus aureus Ji-Hee Hwang,1 Ju-Hyung Lee,2,4 Methicillin-resistant Staphylococcus aureus (MRSA) is a major cause of ear infections. We Jeong-Hwan Hwang,3 Kyung Min Chung,5 attempted to evaluate the clinical usefulness of arbekacin in treating chronic suppurative Eun-Jung Lee,6 Yong-Joo Yoon,4,6 otitis media (CSOM) by comparing its clinical efficacy and toxicity with those of Mi-Kyoung Moon,1 Ju-Sin Kim,1 vancomycin. Efficacy was classified according to bacterial elimination or bacteriologic 1 3,4 Kyoung-Suk Won, and Chang-Seop Lee failure and improved or failed clinical efficacy response. Ninety-five subjects were diagnosed with CSOM caused by MRSA. Twenty of these subjects were treated with 1Department of Pharmacy, Chonbuk National University Hospital, Jeonju; Departments of arbekacin, and 36 with vancomycin. The bacteriological efficacy (bacterial elimination, 2Preventive Medicine and 3Internal Medicine, arbekacin vs. vancomycin: 85.0% vs. 97.2%) and improved clinical efficacy (arbekacin vs. Chonbuk National University Medical School, vancomycin; 90.0% vs. 97.2%) were not different between the two groups. However, the 4 Jeonju; Research Institute of Clinical Medicine of rate of complications was higher in the vancomycin group (33.3%) than in the arbekacin Chonbuk National University-Chonbuk National University Hospital, Jeonju; Departments of group (5.0%) (P = 0.020). In addition, a total of 12 adverse reactions were observed in the 5Microbiology & Immunology, and 6Otolaryngology- vancomycin group; two for hepatotoxicity, one for nephrotoxicity, eight for leukopenia, Head and Neck Surgery, Chonbuk National two for skin rash, and one for drug fever. -
Technical Information
Technical Information Antibiotic Assay Medium No.1 (Seed Agar) Product Code : DM1003 Application: - Antibiotic Assay Medium No.1 (Seed Agar) is used in the microbiological assay of beta-lactam and other antibiotics. Composition** Ingredients Gms / Litre Peptic digest of animal tissue (Peptone) 6.000 or detecting faecal coliforms drinking in water waste water, seawater and foods samples by MPN Method. Casein enzymic hydrolysate 4.000 Yeast extract 3.000 Beef extract 1.500 Dextrose 1.000 Agar 15.000 Final pH (at 25°C) 6.6±0.2 **Formula adjusted, standardized to suit performance parameters Principle & Interpretation The potency of an antibiotic can be determined by chemical, physical and biological methods. An assay is performed to determine the ability of an antibiotic to kill or inhibit the growth of living microorganisms. Biological tests offer the most convenient m eans of performing an assay (1), since a reduction in the antimicrobial activity of a specific antibiotic reveals changes that is not usually displayed by chemical methods (2). Antibacterial susceptibility testing may be performed by either dilution (turbidimetric) or diffusion methods. The choice o f methodology is based on many factors, including ease of performance, flexibility and use of automated or semi-automated devices for both identification and susceptibility testing (3). Grove and Randall have elucidated antibiotic assays and media in their comprehensive treatise on antibiotic assays (4). Antibiotic Assay Medium No.1 is used in the microbiological assay of ß-lactam and other antibiotics. These media are prepared according to the specifications detailed in various pharmacopoeias (2-6) and by the FDA (7). -
"Macrolides"? Classify Each Drug in This Chapter As a Macrolide Or Azalide, and As an Antibiotic Or Semi-Synthetic Derivative
STUDY GUIDE THE MACROLIDE/AZALIDE ANTIMICROBIAL AGENTS 1. Why are these antibiotics derivatives called "macrolides"? Classify each drug in this chapter as a macrolide or azalide, and as an antibiotic or semi-synthetic derivative. 2. What are the key structural differences between erythromycin, clarithromycin, azithromycin and dirithromycin? 3. Generally how does spiramycin and josamycin differ in structure from the commercial macrolides/azalides (2 reasons)? 4. What are the “ketolides and how do they differ in structure from the commercial macrolides? 5. What is the biosynthetic source of erythromycin? What is the lactone moiety of erythromycin called? What sugar moieties are present and what are their properties? 6. What hydrolysis product forms from erythromycin in aqueous acid or base? What is the significance of this reaction? Can it occur with other macrolides? 7. When does the “intramolecular cyclization” reaction occur with erythromycin? What is it's significance (two reasons) and how does it occur? Which functional groups are important for this reaction? 8. What salt forms of erythromycin are available? Which are water soluble? Which are water-insoluble? How is each salt form formulated and used (oral or parenteral)? 9. What ester and ester salt derivatives of erythromycin are available? What is the estolate? How is each salt form formulated and used (oral or parenteral)? What are the advantages of these esters dosage forms? 10. How does clarithromycin differ in structure from erythromycin? Why was this macrolide developed (the role of the 6-methoxy)? 11. How does azithromycin differ in structure from erythromycin? Why was this macrolide developed? 12. How does dirithromycin differ in structure from erythromycin? Why was this macrolide developed? What is the active form of this prodrug? 13. -
(12) United States Patent (10) Patent No.: US 9,662.400 B2 Smith Et Al
USOO9662400B2 (12) United States Patent (10) Patent No.: US 9,662.400 B2 Smith et al. (45) Date of Patent: *May 30, 2017 (54) METHODS FOR PRODUCING A (2013.01); C08B 37/003 (2013.01); C08L 5/08 BODEGRADABLE CHITOSAN (2013.01); A6 IK 38/00 (2013.01); A61 L COMPOSITION AND USES THEREOF 2300/404 (2013.01) (58) Field of Classification Search (71) Applicant: University of Memphis Research CPC ...... A61K 47/36; A61K 31/00; A61K 9/7007; Foundation, Memphis, TN (US) A61K 9/0024; A61 L 15/28: A61L 27/20; A61L 27/58: A61L 31/042; C08B 37/003 (72) Inventors: James Keaton Smith, Memphis, TN USPC ................................ 514/23, 40, 777; 536/20 (US); Ashley C. Parker, Memphis, TN See application file for complete search history. (US); Jessica A. Jennings, Memphis, (56) References Cited TN (US); Benjamin T. Reves, Memphis, TN (US); Warren O. U.S. PATENT DOCUMENTS Haggard, Bartlett, TN (US) 4,895,724. A * 1/1990 Cardinal .............. A61K9/0024 424,278.1 (73) Assignee: The University of Memphis Research 5,541,233 A 7/1996 Roenigk Foundation, Memphis, TN (US) 5,958,443 A 9/1999 Viegas et al. 6,699,287 B2 3/2004 Son et al. (*) Notice: Subject to any disclaimer, the term of this 6,989,157 B2 1/2006 Gillis et al. patent is extended or adjusted under 35 7,371.403 B2 5/2008 McCarthy et al. 2003, OO15825 A1 1/2003 Sugie et al. U.S.C. 154(b) by 0 days. 2003/0206958 A1 11/2003 Cattaneo et al. -
35 Cyproterone Acetate and Ethinyl Estradiol Tablets 2 Mg/0
PRODUCT MONOGRAPH INCLUDING PATIENT MEDICATION INFORMATION PrCYESTRA®-35 cyproterone acetate and ethinyl estradiol tablets 2 mg/0.035 mg THERAPEUTIC CLASSIFICATION Acne Therapy Paladin Labs Inc. Date of Preparation: 100 Alexis Nihon Blvd, Suite 600 January 17, 2019 St-Laurent, Quebec H4M 2P2 Version: 6.0 Control # 223341 _____________________________________________________________________________________________ CYESTRA-35 Product Monograph Page 1 of 48 Table of Contents PART I: HEALTH PROFESSIONAL INFORMATION ....................................................................... 3 SUMMARY PRODUCT INFORMATION ............................................................................................. 3 INDICATION AND CLINICAL USE ..................................................................................................... 3 CONTRAINDICATIONS ........................................................................................................................ 3 WARNINGS AND PRECAUTIONS ....................................................................................................... 4 ADVERSE REACTIONS ....................................................................................................................... 13 DRUG INTERACTIONS ....................................................................................................................... 16 DOSAGE AND ADMINISTRATION ................................................................................................ 20 OVERDOSAGE .................................................................................................................................... -
Allosteric Drug Transport Mechanism of Multidrug Transporter Acrb
ARTICLE https://doi.org/10.1038/s41467-021-24151-3 OPEN Allosteric drug transport mechanism of multidrug transporter AcrB ✉ Heng-Keat Tam 1,3,4 , Wuen Ee Foong 1,4, Christine Oswald1,2, Andrea Herrmann1, Hui Zeng1 & ✉ Klaas M. Pos 1 Gram-negative bacteria maintain an intrinsic resistance mechanism against entry of noxious compounds by utilizing highly efficient efflux pumps. The E. coli AcrAB-TolC drug efflux pump + 1234567890():,; contains the inner membrane H /drug antiporter AcrB comprising three functionally inter- dependent protomers, cycling consecutively through the loose (L), tight (T) and open (O) state during cooperative catalysis. Here, we present 13 X-ray structures of AcrB in inter- mediate states of the transport cycle. Structure-based mutational analysis combined with drug susceptibility assays indicate that drugs are guided through dedicated transport chan- nels toward the drug binding pockets. A co-structure obtained in the combined presence of erythromycin, linezolid, oxacillin and fusidic acid shows binding of fusidic acid deeply inside the T protomer transmembrane domain. Thiol cross-link substrate protection assays indicate that this transmembrane domain-binding site can also accommodate oxacillin or novobiocin but not erythromycin or linezolid. AcrB-mediated drug transport is suggested to be allos- terically modulated in presence of multiple drugs. 1 Institute of Biochemistry, Goethe-University Frankfurt, Frankfurt am Main, Germany. 2 Sosei Heptares, Steinmetz Building, Granta Park, Great Abington, Cambridge, UK. 3Present -
Antibiotics Acting on the Translational Machinery
Cell Science at a Glance 1391 Antibiotics acting on ribosomal factors, and recent structural Initiation studies of the ribosome (Ban et al., 2000; Prokaryotic protein synthesis starts with the translational Harms et al., 2001; Nissen et al., 2000; the formation of an initiation complex machinery Schlünzen et al., 2000; Wimberly et al., comprising the mRNA, initiator tRNA fMet 1, 1 2000; Yusupov et al., 2001) and (fMet-tRNA ), three initiation factors Jörg M. Harms *, Heike Bartels , complexes of ribosomes with inhibitors (IFs) and the 30S subunit. IF3 binding Frank Schlünzen1 and Ada (Brodersen et al., 2000; Pioletti et al., prevents association of the two Yonath1,2 2001; Schlünzen et al., 2001; Hansen et ribosomal subunits, verifies codon- 1Max-Planck Arbeitsgruppe Ribosomenstruktur, al., 2002; Bashan et al., 2003; Schlünzen anticodon complementarity and appears Notkestr. 85, 22607 Hamburg, Germany 2Department of Structural Biology, Weizmann et al., 2003) are now revealing the to regulate positioning of the mRNA. Institute, 76100 Rehovot, Israel mechanisms underlying their inhibitory IF1 blocks the acceptor site (A-site) to *Author for correspondence (e-mail: activity. prevent premature binding of the A-site [email protected]) tRNA. After binding of fMet-tRNAfMet, IF3 is released; this triggers hydrolysis Journal of Cell Science 116, 1391-1393 Responsibility for the various steps of © 2003 The Company of Biologists Ltd polypeptide synthesis is divided among of IF2-bound GTP, and IF2 and IF1 are doi:10.1242/jcs.00365 released (the exact sequence of events is the two ribosomal subunits (30S and not known). The 50S subunit then joins 50S). The 30S subunit ensures fidelity of Despite the appearance of bacterial the 30S initiation complex, forming the strains resistant to all clinical antibiotics, decoding by establishing accurate 70S ribosome. -
Combination of Minocycline and Rifampicin Against Methicillin- and Gentamicin-Resistant Staphylococcus Aureus
J Clin Pathol: first published as 10.1136/jcp.34.5.559 on 1 May 1981. Downloaded from J Clin Pathol 1981 ;34:559-563 Combination of minocycline and rifampicin against methicillin- and gentamicin-resistant Staphylococcus aureus E YOURASSOWSKY, MP VAN DER LINDEN, MJ LISMONT, F CROKAERT From the H6pital Universitaire Brugmann, Service de Biologie Clinique, 1020 Bruxelles, Belgique SUMMARY Methicillin- and gentamicin-resistant Staphylococcus aureus may remain sensitive to minocycline and to rifampicin. A study of growth curves has shown that at inhibitory concentrations (0-4 ,ug/ml), minocycline prevents the development of mutants resistant to rifampicin. Staphylococcus aureus resistant to methicillin and strains of different phage type were selected for this gentamicin is responsible for an increasing number of investigation. hospital infections, some of which are severe.1-7 A number of treatments have been suggested although Microbial strains vancomycin is often the only major antibiotic which Minocycline HCL (Cyanamid Benelux, batch no is active against these strains. However, it is necessary 7116B-172). Rifampicin (Lepetit, batch no P/4) copyright. to assess the effect of the "second choice" antibiotics. (solution in dimethyl formamide). The MICs of The risk of rapid development of resistance to minocycline (tube dilution method in Mueller Hinton rifampicin is well known,8 9 and in spite of the medium, inoculum 106 micro-organisms/ml) were excellent penetration particularly in polymor- 0-2 ,ug/ml for all the strains. Rifampicin showed phonuclear cells of this antibiotic,10 11 its use alone is minimal inhibitory activity in liquid medium up to contraindicated. Minocycline is active against Staph a concentration of 0-01 ,ug/ml. -
Tetracycline and Sulfonamide Antibiotics in Soils: Presence, Fate and Environmental Risks
processes Review Tetracycline and Sulfonamide Antibiotics in Soils: Presence, Fate and Environmental Risks Manuel Conde-Cid 1, Avelino Núñez-Delgado 2 , María José Fernández-Sanjurjo 2 , Esperanza Álvarez-Rodríguez 2, David Fernández-Calviño 1,* and Manuel Arias-Estévez 1 1 Soil Science and Agricultural Chemistry, Faculty Sciences, University Vigo, 32004 Ourense, Spain; [email protected] (M.C.-C.); [email protected] (M.A.-E.) 2 Department Soil Science and Agricultural Chemistry, Engineering Polytechnic School, University Santiago de Compostela, 27002 Lugo, Spain; [email protected] (A.N.-D.); [email protected] (M.J.F.-S.); [email protected] (E.Á.-R.) * Correspondence: [email protected] Received: 30 October 2020; Accepted: 13 November 2020; Published: 17 November 2020 Abstract: Veterinary antibiotics are widely used worldwide to treat and prevent infectious diseases, as well as (in countries where allowed) to promote growth and improve feeding efficiency of food-producing animals in livestock activities. Among the different antibiotic classes, tetracyclines and sulfonamides are two of the most used for veterinary proposals. Due to the fact that these compounds are poorly absorbed in the gut of animals, a significant proportion (up to ~90%) of them are excreted unchanged, thus reaching the environment mainly through the application of manures and slurries as fertilizers in agricultural fields. Once in the soil, antibiotics are subjected to a series of physicochemical and biological processes, which depend both on the antibiotic nature and soil characteristics. Adsorption/desorption to soil particles and degradation are the main processes that will affect the persistence, bioavailability, and environmental fate of these pollutants, thus determining their potential impacts and risks on human and ecological health. -
Double Stage Activity in Aminoglycoside Antibiotics
VOL.53 NO. 10, OCT.2000 THE JOURNAL OF ANTIBIOTICS pp.1168 - 1174 Double Stage Activity in Aminoglycoside Antibiotics Kunimoto Hotta, Atsuko Sunada, Yoko Ikeda1" and Shinichi Kondo1" National Institute of Infectious Diseases, 1-23-1 Toyama, Shinjuku-ku, Tokyo 162-8640, Japan f Institute of Microbial Chemistry, 3-14-23 Kamiosaki, Shinagawa-ku, Tokyo 141-0021, Japan (Received for publication July 5, 2000) Fourteen different aminoglycoside antibiotics (AGs) were challenged with aminoglycoside acetyltransferases (AACs) of actinomycete origin in order to examine their 'double stage activity' that is arbitrarily defined as antibiotic activity retainable after enzymatic modification. In kanamycin (KM)-group AGs tested [KM, dibekacin (DKB), amikacin and arbekacin (ABK)], ABKretained activity after acetylations by AAC(3), AAC(2') and AAC(6'). DKBalso retained a weak activity after acetylation by AAC(2'). In gentamicin (GM)-group AGs tested [GM, micronomicin, sisomicin (SISO), netilmicin (NTL) and isepamicin], GM, SISO and NTL retained activites after acetylation by AAC(2'). In neomycin (NM)-group AGs tested [ribostamycin, NM,paromomycin], NMretained activity after acetylation by AAC(6') and AAC(2'). None of astromicin (ASTM)-group AGs tested (ASTMand istamycin B) retained activity after acetylation by AAC(2') and AAC(6'). The activities of acetylated ABK derivatives by AAC(3) and AAC(2') were distinctively high, compared to the others. Streptomyces lividans TK21containing the cloned aac genes were markedly sensitive to AGs that retained activities after acetylation, indicating the substantial effect of 'double stage activity'. Aminoglycoside (AG) antibiotics are generally resistant bacteria was developed by introducing (S)-4- inactivated by acetylation, phosphorylation and adenylyl- amino-2-hydroxybutyryl (AHB) side chain at 1-NH2 of ation due to AG acetyltransferases (AACs), AG KM. -
Infant Antibiotic Exposure Search EMBASE 1. Exp Antibiotic Agent/ 2
Infant Antibiotic Exposure Search EMBASE 1. exp antibiotic agent/ 2. (Acedapsone or Alamethicin or Amdinocillin or Amdinocillin Pivoxil or Amikacin or Aminosalicylic Acid or Amoxicillin or Amoxicillin-Potassium Clavulanate Combination or Amphotericin B or Ampicillin or Anisomycin or Antimycin A or Arsphenamine or Aurodox or Azithromycin or Azlocillin or Aztreonam or Bacitracin or Bacteriocins or Bambermycins or beta-Lactams or Bongkrekic Acid or Brefeldin A or Butirosin Sulfate or Calcimycin or Candicidin or Capreomycin or Carbenicillin or Carfecillin or Cefaclor or Cefadroxil or Cefamandole or Cefatrizine or Cefazolin or Cefixime or Cefmenoxime or Cefmetazole or Cefonicid or Cefoperazone or Cefotaxime or Cefotetan or Cefotiam or Cefoxitin or Cefsulodin or Ceftazidime or Ceftizoxime or Ceftriaxone or Cefuroxime or Cephacetrile or Cephalexin or Cephaloglycin or Cephaloridine or Cephalosporins or Cephalothin or Cephamycins or Cephapirin or Cephradine or Chloramphenicol or Chlortetracycline or Ciprofloxacin or Citrinin or Clarithromycin or Clavulanic Acid or Clavulanic Acids or clindamycin or Clofazimine or Cloxacillin or Colistin or Cyclacillin or Cycloserine or Dactinomycin or Dapsone or Daptomycin or Demeclocycline or Diarylquinolines or Dibekacin or Dicloxacillin or Dihydrostreptomycin Sulfate or Diketopiperazines or Distamycins or Doxycycline or Echinomycin or Edeine or Enoxacin or Enviomycin or Erythromycin or Erythromycin Estolate or Erythromycin Ethylsuccinate or Ethambutol or Ethionamide or Filipin or Floxacillin or Fluoroquinolones -
Pharmaceutical Microbiology Table of Contents
TM Pharmaceutical Microbiology Table of Contents Pharmaceutical Microbiology ������������������������������������������������������������������������������������������������������������������������ 1 Strains specified by official microbial assays ������������������������������������������������������������������������������������������������ 2 United States Pharmacopeia (USP) �������������������������������������������������������������������������������������������������������������������������������������������2 European Pharmacopeia (EP) Edition 8�1 ���������������������������������������������������������������������������������������������������������������������������������5 Japanese Pharmacopeia (JP) ������������������������������������������������������������������������������������������������������������������������������������������������������7 Strains listed by genus and species �������������������������������������������������������������������������������������������������������������10 ATCC provides research and development tools and reagents as well as related biological material management services, consistent with its mission: to acquire, authenticate, preserve, develop, and distribute standard reference THE ESSENTIALS microorganisms, cell lines, and related materials for research in the life sciences� OF LIFE SCIENCE For over 85 years, ATCC has been a leading authenticate and further develop products provider of high-quality biological materials and services essential to the needs of basic and standards to the life