ECDC, EFSA and EMA Joint Scientific Opinion on a List of Outcome
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FDA-Approved Drugs with Potent in Vitro Antiviral Activity Against Severe Acute Respiratory Syndrome Coronavirus 2
pharmaceuticals Article FDA-Approved Drugs with Potent In Vitro Antiviral Activity against Severe Acute Respiratory Syndrome Coronavirus 2 1, , 1, 2 1 Ahmed Mostafa * y , Ahmed Kandeil y , Yaseen A. M. M. Elshaier , Omnia Kutkat , Yassmin Moatasim 1, Adel A. Rashad 3 , Mahmoud Shehata 1 , Mokhtar R. Gomaa 1, Noura Mahrous 1, Sara H. Mahmoud 1, Mohamed GabAllah 1, Hisham Abbas 4 , Ahmed El Taweel 1, Ahmed E. Kayed 1, Mina Nabil Kamel 1, Mohamed El Sayes 1, Dina B. Mahmoud 5 , Rabeh El-Shesheny 1 , Ghazi Kayali 6,7,* and Mohamed A. Ali 1,* 1 Center of Scientific Excellence for Influenza Viruses, National Research Centre, Giza 12622, Egypt; [email protected] (A.K.); [email protected] (O.K.); [email protected] (Y.M.); [email protected] (M.S.); [email protected] (M.R.G.); [email protected] (N.M.); [email protected] (S.H.M.); [email protected] (M.G.); [email protected] (A.E.T.); [email protected] (A.E.K.); [email protected] (M.N.K.); [email protected] (M.E.S.); [email protected] (R.E.-S.) 2 Organic & Medicinal Chemistry Department, Faculty of Pharmacy, University of Sadat City, Menoufia 32897, Egypt; [email protected] 3 Department of Biochemistry & Molecular Biology, Drexel University College of Medicine, Philadelphia, PA 19102, USA; [email protected] 4 Department of Microbiology and Immunology, Zagazig University, Zagazig 44519, Egypt; [email protected] 5 Pharmaceutics Department, National Organization for Drug Control and Research, Giza 12654, Egypt; [email protected] 6 Department of Epidemiology, Human Genetics, and Environmental Sciences, University of Texas, Houston, TX 77030, USA 7 Human Link, Baabda 1109, Lebanon * Correspondence: [email protected] (A.M.); [email protected] (G.K.); [email protected] (M.A.A.) Contributed equally to this work. -
Folic Acid Antagonists: Antimicrobial and Immunomodulating Mechanisms and Applications
International Journal of Molecular Sciences Review Folic Acid Antagonists: Antimicrobial and Immunomodulating Mechanisms and Applications Daniel Fernández-Villa 1, Maria Rosa Aguilar 1,2 and Luis Rojo 1,2,* 1 Instituto de Ciencia y Tecnología de Polímeros, Consejo Superior de Investigaciones Científicas, CSIC, 28006 Madrid, Spain; [email protected] (D.F.-V.); [email protected] (M.R.A.) 2 Consorcio Centro de Investigación Biomédica en Red de Bioingeniería, Biomateriales y Nanomedicina, 28029 Madrid, Spain * Correspondence: [email protected]; Tel.: +34-915-622-900 Received: 18 September 2019; Accepted: 7 October 2019; Published: 9 October 2019 Abstract: Bacterial, protozoan and other microbial infections share an accelerated metabolic rate. In order to ensure a proper functioning of cell replication and proteins and nucleic acids synthesis processes, folate metabolism rate is also increased in these cases. For this reason, folic acid antagonists have been used since their discovery to treat different kinds of microbial infections, taking advantage of this metabolic difference when compared with human cells. However, resistances to these compounds have emerged since then and only combined therapies are currently used in clinic. In addition, some of these compounds have been found to have an immunomodulatory behavior that allows clinicians using them as anti-inflammatory or immunosuppressive drugs. Therefore, the aim of this review is to provide an updated state-of-the-art on the use of antifolates as antibacterial and immunomodulating agents in the clinical setting, as well as to present their action mechanisms and currently investigated biomedical applications. Keywords: folic acid antagonists; antifolates; antibiotics; antibacterials; immunomodulation; sulfonamides; antimalarial 1. -
Antibiotic Resistance in the European Union Associated with Therapeutic Use of Veterinary Medicines
The European Agency for the Evaluation of Medicinal Products Veterinary Medicines Evaluation Unit EMEA/CVMP/342/99-Final Antibiotic Resistance in the European Union Associated with Therapeutic use of Veterinary Medicines Report and Qualitative Risk Assessment by the Committee for Veterinary Medicinal Products 14 July 1999 Public 7 Westferry Circus, Canary Wharf, London, E14 4HB, UK Switchboard: (+44-171) 418 8400 Fax: (+44-171) 418 8447 E_Mail: [email protected] http://www.eudra.org/emea.html ãEMEA 1999 Reproduction and/or distribution of this document is authorised for non commercial purposes only provided the EMEA is acknowledged TABLE OF CONTENTS Page 1. INTRODUCTION 1 1.1 DEFINITION OF ANTIBIOTICS 1 1.1.1 Natural antibiotics 1 1.1.2 Semi-synthetic antibiotics 1 1.1.3 Synthetic antibiotics 1 1.1.4 Mechanisms of Action 1 1.2 BACKGROUND AND HISTORY 3 1.2.1 Recent developments 3 1.2.2 Authorisation of Antibiotics in the EU 4 1.3 ANTIBIOTIC RESISTANCE 6 1.3.1 Microbiological resistance 6 1.3.2 Clinical resistance 6 1.3.3 Resistance distribution in bacterial populations 6 1.4 GENETICS OF RESISTANCE 7 1.4.1 Chromosomal resistance 8 1.4.2 Transferable resistance 8 1.4.2.1 Plasmids 8 1.4.2.2 Transposons 9 1.4.2.3 Integrons and gene cassettes 9 1.4.3 Mechanisms for inter-bacterial transfer of resistance 10 1.5 METHODS OF DETERMINATION OF RESISTANCE 11 1.5.1 Agar/Broth Dilution Methods 11 1.5.2 Interpretative criteria (breakpoints) 11 1.5.3 Agar Diffusion Method 11 1.5.4 Other Tests 12 1.5.5 Molecular techniques 12 1.6 MULTIPLE-DRUG RESISTANCE -
Sexually Transmitted Diseases Treatment Options
Sexually transmitted disease (STD) treatment options PREFERRED & ALTERNATIVE OPTIONS Many clinical partners are operating in a limited capacity during the COVID-19 pandemic. Below are preferred (in clinic or other location where injections can be given) and alternative (when only oral medicines are available 1) treatments for STDs. Syndrome Preferred Treatments Alternative Treatments Follow-up Male urethritis syndrome Ceftriaxone 250mg intramuscular (IM) x 1 PLUS Men who have sex with men (MSM) and transgender women2: Patients should be counseled to azithromycin 1g PO x 1 Cefixime 800 mg PO x 1 PLUS doxycycline 100 mg PO BID x 7 days be tested for STDs once clinical Presumptively treating: care is resumed in the local If azithromycin is not available: doxycycline 100 Men who have sex with women only: gonorrhea clinics. Clients who have been mg PO BID for 7 days (except in pregnancy3) Cefixime 800mg PO x 1 PLUS azithromycin 1g PO x 1 referred for oral treatment If cephalosporin allergy5 is reported, gentamicin If cefixime is unavailable, substitute cefpodoxime 400mg PO q12h should return for 240mg IM x 1 PLUS azithromycin 2g PO x 1 x 2 for cefixime in above regimens4 comprehensive testing and screening and linked to services If oral cephalosporin not available or history of cephalosporin at that time. allergy5: azithromycin 2g PO x 1 If azithromycin is not available: doxycycline 100 mg PO BID for 7 days (except in pregnancy3) Patients should be advised to abstain from sex for 7 days Treatment typically guided by examination and For presumptive therapy when examination and laboratory following completion of Vaginal discharge syndrome treatment. -
Azithromycin (Systemic) | Memorial Sloan Kettering Cancer Center
PATIENT & CAREGIVER EDUCATION Azithromycin (Systemic) This information from Lexicomp® explains what you need to know about this medication, including what it’s used for, how to take it, its side effects, and when to call your healthcare provider. Brand Names: US Zithromax; Zithromax Tri-Pak; Zithromax Z-Pak; Zmax [DSC] Brand Names: Canada ACT Azithromycin [DSC]; AG-Azithromycin; APO-Azithromycin; APO-Azithromycin Z; AURO-Azithromycin; DOM-Azithromycin; GD-Azithromycin [DSC]; GEN- Azithromycin; JAMP-Azithromycin; M-Azithromycin; Mar-Azithromycin; MYLAN- Azithromycin [DSC]; NRA-Azithromycin; PHL-Azithromycin [DSC]; PMS- Azithromycin; PRO-Azithromycin; RATIO-Azithromycin; RIVA-Azithromycin; SANDOZ Azithromycin; TEVA-Azithromycin; Zithromax What is this drug used for? It is used to treat or prevent bacterial infections. What do I need to tell my doctor BEFORE I take this drug? If you are allergic to this drug; any part of this drug; or any other drugs, foods, or substances. Tell your doctor about the allergy and what signs you had. If you have turned yellow or had liver side effects with this drug before. If you have any of these health problems: Long QTc on ECG or other heartbeat that is not normal, slow heartbeat, or low potassium or magnesium levels. If you have heart failure (weak heart). Azithromycin (Systemic) 1/8 If you have ever had a certain type of abnormal heartbeat (torsades de pointes). If you are taking any drugs that can cause a certain type of heartbeat that is not normal (prolonged QT interval). There are many drugs that can do this. Ask your doctor or pharmacist if you are not sure. -
Section 5: Enzymes, Equilibrium, Energy and the Metabolic Inhibitors
Small World Initiative Instructor Guide Section 5: Enzymes, Equilibrium, Energy and the Metabolic Inhibitors Section 5: Enzymes, Equilibrium, Energy and the Metabolic Inhibitors TOPICS Enzyme kinetics Binding equilibrium Free energy Metabolic reactions/energy production Molecular binding specificity Mechanism of action of metabolic inhibitors SUMMARY We continue our investigation of antibiotic specificity by introducing the metabolic inhibitors. The two different classes of metabolic inhibitors use two different mechanisms to achieve specificity. Like the β-lactams, the sulfonamides achieve specificity by binding to and inhibiting a target molecule not present in eukaryotes. In contrast, trimethoprim is representative of those antibiotics that target a specific region of a molecule present in both prokaryotes and eukaryotes. The subtle structural difference between the prokaryotic and eukaryotic version of the target is such that binding affinity of the antibiotic to the eukaryotic version is reduced relative to the prokaryotic version. We use the metabolic inhibitors as a context for discussing enzyme kinetics and energy. Instructors may also wish to include the key conserved metabolic pathways (glycolysis, tricarboxylic acid cycle, oxidative phosphorylation) as well as highlighting the metabolic diversity of the prokaryotes, although that content is not represented in the slides. LEARNING GOALS • Be able to explain the mechanism of action of metabolic inhibitors at the molecular level • Know the factors that determine rates of chemical reactions. • Know the factors that determine equilibrium of chemical reactions. • Explain how enzymes achieve substrate specificity • Describe the molecular basis for antibiotic-target “binding” (covalent, non- covalent bond formation) • Explain binding equilibrium as it pertains to antibiotic-target binding (and how it affects efficacy of an antibiotic) • Describe how metabolic inhibitors achieve prokaryotic specificity. -
Antimicrobial Resistance in Fecal Escherichia Coli and Salmonella
Varga et al. BMC Veterinary Research (2019) 15:464 https://doi.org/10.1186/s12917-019-2187-z RESEARCH ARTICLE Open Access Antimicrobial resistance in fecal Escherichia coli and Salmonella enterica isolates: a two- year prospective study of small poultry flocks in Ontario, Canada Csaba Varga1* , Michele T. Guerin2, Marina L. Brash3, Durda Slavic3, Patrick Boerlin4 and Leonardo Susta4 Abstract Background: Although keeping small poultry flocks is increasingly popular in Ontario, information on the antimicrobial susceptibility of enteric bacteria of such flocks is lacking. The current study was conducted on small poultry flocks in Ontario between October 2015 and September 2017, and samples were submitted on a voluntary basis to Ontario’s Animal Health Laboratory. From each submission, a pooled cecal sample was obtained from all the birds of the same species from the same flock and tested for the presence of two common enteric pathogens, E. coli and Salmonella. Three different isolates from each E. coli-positive sample and one isolate from each Salmonella- positive sample were selected and tested for susceptibility to 14 antimicrobials using a broth microdilution technique. Results: A total of 433 fecal E. coli isolates (358 chicken, 27 turkey, 24 duck, and 24 game bird) and 5 Salmonella isolates (3 chicken, 1 turkey, and 1 duck) were recovered. One hundred and sixty-seven chicken, 5 turkey, 14 duck, and 15 game bird E. coli isolates were pan-susceptible. For E. coli, a moderate to high proportion of isolates were resistant to tetracycline (43% chicken, 81% turkey, 42% duck, and 38% game bird isolates), streptomycin (29% chicken, 37% turkey, and 33% game bird isolates), sulfonamides (17% chicken, 37% turkey, and 21% duck isolates), and ampicillin (16% chicken and 41% turkey isolates). -
Fluoroquinolone Mechanisms of Action and Resistance
Downloaded from http://perspectivesinmedicine.cshlp.org/ on October 1, 2021 - Published by Cold Spring Harbor Laboratory Press Topoisomerase Inhibitors: Fluoroquinolone Mechanisms of Action and Resistance David C. Hooper1 and George A. Jacoby2 1Division of Infectious Diseases, Massachusetts General Hospital, Boston, Massachusetts 02114 2Lahey Hospital and Medical Center, Burlington, Massachusetts 01805 Correspondence: [email protected] Quinolone antimicrobials are widely used in clinical medicine and are the only current class of agents that directly inhibit bacterial DNA synthesis. Quinolones dually target DNA gyrase and topoisomerase IV binding to specific domains and conformations so as to block DNA strand passage catalysis and stabilize DNA–enzyme complexes that block the DNA repli- cation apparatus and generate double breaks in DNA that underlie their bactericidal activity. Resistance has emerged with clinical use of these agents and is common in some bacterial pathogens. Mechanisms of resistance include mutational alterations in drug target affinity and efflux pump expression and acquisition of resistance-conferring genes. Resistance mu- tations in one or both of the two drug target enzymes are commonly in a localized domain of the GyrA and ParC subunits of gyrase and topoisomerase IV, respectively, and reduce drug binding to the enzyme–DNA complex. Other resistance mutations occur in regulatory genes that control the expression of native efflux pumps localized in the bacterial membrane(s). These pumps have broad substrate profiles that include other antimicrobials as well as quin- olones. Mutations of both types can accumulate with selection pressure and produce highly resistant strains. Resistance genes acquired on plasmids confer low-level resistance that promotes the selection of mutational high-level resistance. -
A Comparative Study on Ivermectin-Doxycycline and Hydroxychloroquine-Azithromycin Therapy on COVID-19 Patients
DOI: 10.14744/ejmo.2021.16263 EJMO 2021;5(1):63–70 Research Article A Comparative Study on Ivermectin-Doxycycline and Hydroxychloroquine-Azithromycin Therapy on COVID-19 Patients Abu Taiub Mohammed Mohiuddin Chowdhury,1 Mohammad Shahbaz,2 Md Rezaul Karim,3 Jahirul Islam, Guo Dan,1 Shuixiang He1 1Department of Gastroenterology, First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, Shaanxi, P.R. China 2Chakoria Upazilla Health Complex, Cox’s Bazar, Bangladesh 3Biomedical Research Institute of Hubei University of Medicine, Shiyan, China 4Department of Epidemiology and Health Statistics, Xi’an Jiaotong University, Xi’an, Shaanxi, P.R. China Abstract Objectives: We investigated the outcomes of Ivermectin-Doxycycline vs. Hydroxychloroquine-Azithromycin combina- tion therapy in mild to moderate COVID19 patients. Methods: Patients were divided randomly into two groups: Ivermectin 200µgm/kg single dose + Doxycycline 100mg BID for ten days in group A, and Hydroxychloroquine 400mg for the first day, then 200mg BID for nine days + Azithro- mycin 500mg daily for five days in group B (Control group). RT-PCR for SARS-CoV-2 infection was repeated in all symp- tomatic patients on the second day onward without symptoms. Repeat PCR was done every two days onward if the result found positive. Time to the negative PCR and symptomatic recovery was measured for each group. Results: All subjects in Group A reached a negative PCR, at a mean of 8.93 days, and reached symptomatic recovery, at a mean of 5.93 days, with 55.10% symptom-free by the fifth day. In group B, 96.36% reached a negative PCR at a mean of 9.33 days and were symptoms-free at 6.99 days. -
PACKAGE LEAFLET: INFORMATION for the USER Levofloxacin 5 Mg
PACKAGE LEAFLET: INFORMATION FOR THE USER Levofloxacin 5 mg/ml solution for infusion Levofloxacin Read all of this leaflet carefully before you are given this medicine because it contains important information for you • Keep this leaflet. You may need to read it again. • If you have any further questions, ask your doctor, pharmacist or nurse. • This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their signs of illness are the same as yours. • If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. See section 4. What is in this leaflet 1. What Levofloxacin solution for infusion is and what it is used for 2. What you need to know before you are given Levofloxacin solution for infusion 3. How Levofloxacin solution for infusion is given 4. Possible side effects 5. How to store Levofloxacin solution for infusion 6. Contents of the pack and other information 1. What Levofloxacin solution for infusion is and what it is used for The name of your medicine is Levofloxacin solution for infusion. Levofloxacin solution for infusion contains a medicine called levofloxacin. This belongs to a group of medicines called antibiotics. Levofloxacin is a ’quinolone’ antibiotic. It works by killing the bacteria that cause infections in your body. Levofloxacin solution for infusion can be used to treat infections of the: • Lungs, in people with pneumonia • Urinary tract, including your kidneys or bladder • Prostate gland, where you have a long lasting infection • Skin and underneath the skin, including muscles. -
Guidance for Treatment of Covid-19 in Adults and Children
GUIDANCE FOR TREATMENT OF COVID-19 IN ADULTS AND CHILDREN Patient population: Adults and pediatric patients with COVID-19 infection, who are admitted on an inpatient floor or to the intensive care unit. Key points: Details regarding isolation/precautions, personal protective equipment, patient movement, family/visitor policy, and cleaning/disinfection can be found here. Clinical symptoms: Range from asymptomatic, uncomplicated upper respiratory tract viral infection to pneumonia, acute respiratory distress syndrome (ARDS), sepsis, and septic shock (Table 1) Diagnosis: See current COVID-19 testing recommendations. Treatment: Based on data from several randomized control trials, Remdesivir may provide a modest benefit in a subgroup of patients hospitalized with COVID-19. See further details regarding patient populations (see below) and Table 2. Table 1. Potential Treatment Recommendations by Severity of Disease for Patients 18 Years or Older Most COVID-19 therapeutics have not been studied in children under 18. The below treatment recommendations may apply to some children, however should be addressed on a case-by-case basis and discussed with Pediatric Infectious Diseases. See specific sections for further details Disease severity Potential Treatment Recommendations (per ID consult discretion based on details in Table 2) Post-exposure prophylaxis • See Post-Exposure Prophylaxis Guidelines No supplemental oxygen • Supportive care • Monoclonal Antibodies may be an option in certain high-risk patients (see eligibility criteria in Table 2) admitted for reasons other than COVID-19 who have mild to moderate symptoms of COVID-19 Low flow supplemental oxygen • Supportive care • Dexamethasone (Exception: Minimal supplemental oxygen (1-2 L) in adults with <7 days of symptoms—uncertain benefit) • Remdesivir High flow supplemental oxygen or non- • Supportive Care invasive mechanical ventilation • Dexamethasone • Tocilizumab (NOTE: currently on shortage and not available for treatment of COVID-19 in patients 18 years an older. -
Disabling and Potentially Permanent Side Effects Lead to Suspension Or Restrictions of Quinolone and Fluoroquinolone Antibiotics
16 November 2018 EMA/795349/2018 Disabling and potentially permanent side effects lead to suspension or restrictions of quinolone and fluoroquinolone antibiotics EMA has reviewed serious, disabling and potentially permanent side effects with quinolone and fluoroquinolone antibiotics given by mouth, injection or inhalation. The review incorporated the views of patients, healthcare professionals and academics presented at EMA’s public hearing on fluoroquinolone and quinolone antibiotics in June 2018. EMA’s human medicines committee (CHMP) has endorsed the recommendations of EMA’s safety committee (PRAC) and concluded that the marketing authorisation of medicines containing cinoxacin, flumequine, nalidixic acid, and pipemidic acid should be suspended. The CHMP confirmed that the use of the remaining fluoroquinolone antibiotics should be restricted. In addition, the prescribing information for healthcare professionals and information for patients will describe the disabling and potentially permanent side effects and advise patients to stop treatment with a fluoroquinolone antibiotic at the first sign of a side effect involving muscles, tendons or joints and the nervous system. Restrictions on the use of fluoroquinolone antibiotics will mean that they should not be used: • to treat infections that might get better without treatment or are not severe (such as throat infections); • to treat non-bacterial infections, e.g. non-bacterial (chronic) prostatitis; • for preventing traveller’s diarrhoea or recurring lower urinary tract infections (urine infections that do not extend beyond the bladder); • to treat mild or moderate bacterial infections unless other antibacterial medicines commonly recommended for these infections cannot be used. Importantly, fluoroquinolones should generally be avoided in patients who have previously had serious side effects with a fluoroquinolone or quinolone antibiotic.