Download or read book P Falciparum and Its Molecular Markers of Resistance to Antimalarial Drugs written by Peter Hodoameda and published by . This book was released on 2019 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of molecular markers of resistance to monitor the emergence, and the spread of parasite resistance to antimalarial drugs is a very effective way of monitoring antimalarial drug resistance. The identification and validation of molecular markers have boosted our confidence in using these tools to monitor resistance. For example, P. falciparum chloroquine resistance transporter (PfCRT), P. falciparum multidrug resistance protein 1 (PfMDR1), P. falciparum multidrug kelch 13 (pfk13), have been identified as molecular markers of resistance to chloroquine, lumefantrine, and artemisinin respectively. The mechanism of resistance to antimalarial drugs is mostly by; (1) undergoing mutations in the parasite genome, leading to expelling the drug from the digestive vacuole, or (2) loss of binding affinity between the drug and its target. Increased copy number in the pfmdr1 gene also leads to resistance to antimalarial drugs. The major cause of the widespread chloroquine and sulfadoxine-pyrimethamine resistance globally is the spread of parasites resistant to these drugs from Southeast Asia to Africa, the Pacific, and South America. Only a few mutations in the parasite genome lead to resistance to chloroquine and sulfadoxine-pyrimethamine arising from indigenous parasites in Africa, Pacific, and South America.

Download or read book Saving Lives Buying Time written by Institute of Medicine and published by National Academies Press. This book was released on 2004-09-09 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt: For more than 50 years, low-cost antimalarial drugs silently saved millions of lives and cured billions of debilitating infections. Today, however, these drugs no longer work against the deadliest form of malaria that exists throughout the world. Malaria deaths in sub-Saharan Africaâ€"currently just over one million per yearâ€"are rising because of increased resistance to the old, inexpensive drugs. Although effective new drugs called "artemisinins" are available, they are unaffordable for the majority of the affected population, even at a cost of one dollar per course. Saving Lives, Buying Time: Economics of Malaria Drugs in an Age of Resistance examines the history of malaria treatments, provides an overview of the current drug crisis, and offers recommendations on maximizing access to and effectiveness of antimalarial drugs. The book finds that most people in endemic countries will not have access to currently effective combination treatments, which should include an artemisinin, without financing from the global community. Without funding for effective treatment, malaria mortality could double over the next 10 to 20 years and transmission will intensify.

Download or read book Malaria Drugs Disease and Post genomic Biology written by David Sullivan and published by Springer Science & Business Media. This book was released on 2006-01-09 with total page 447 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite rapid increases in knowledge, malaria continues to kill more than a million people each year and causes symptomatic disease in a further 300 million individuals. This volume brings some of the world's best investigators to describe recent advances in both the scientific and clinical aspects of malaria, and bridges between the two.

Download or read book Global Technical Strategy for Malaria 2016 2030 written by World Health Organization and published by World Health Organization. This book was released on 2015-11-04 with total page 35 pages. Available in PDF, EPUB and Kindle. Book excerpt: The World Health Organization's Global Technical Strategy for Malaria 2016- 2030 has been developed with the aim to help countries to reduce the human suffering caused by the world's deadliest mosquito-borne disease. Adopted by the World Health Assembly in May 2015 it provides comprehensive technical guidance to countries and development partners for the next 15 years emphasizing the importance of scaling up malaria responses and moving towards elimination. It also highlights the urgent need to increase investments across all interventions - including preventive measures diagnostic testing treatment and disease surveillance- as well as in harnessing innovation and expanding research. By adopting this strategy WHO Member States have endorsed the bold vision of a world free of malaria and set the ambitious new target of reducing the global malaria burden by 90% by 2030. They also agreed to strengthen health systems address emerging multi-drug and insecticide resistance and intensify national cross-border and regional efforts to scale up malaria responses to protect everyone at risk.

Download or read book Treatment and Prevention of Malaria written by Henry M. Staines and published by Springer Science & Business Media. This book was released on 2012-01-06 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malaria has defeated previous efforts at eradication and remains a massive global public health problem despite being readily preventable and treatable. It is a devastating disease that also extracts huge economic costs from the poorest countries in endemic regions. Starting with an overview of the disease and its current political, financial and technical context, this Milestones in Drug Therapy volume describes the history, chemistry, mechanisms of action and resistance, preclinical and clinical use, pharmacokinetics and safety and tolerability of the current range of antimalarial drugs. There is particular emphasis on artemisinins and related peroxides, as these drugs have now become the frontline treatment for malaria. Next generation antimalarials, molecular markers for detecting resistance, the importance of diagnostics and disease prevention are also covered in detail.

Download or read book Report on antimalarial drug efficacy resistance and response written by World Health Organization and published by World Health Organization. This book was released on 2020-08-31 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Resistance to antimalarial drugs challenges our ability to save lives threatened by malaria, and to eliminate the burden that malaria places on individuals and societies. This burden is substantial, with malaria having caused an estimated 228 million cases and 405 000 deaths in 2018 (1). The Global technical strategy for malaria 2016–2030, adopted at the World Health Assembly in 2015, highlights the potential of antimalarial drug resistance to seriously weaken the effectiveness of malaria responses and erode the gains achieved (2). Monitoring antimalarial drug efficacy and resistance is important for the early detection of resistance, which in turn enables timely action to prevent its spread and limit the impact on global health. Measurement of drug efficacy and resistance in malaria is complex. Studies of clinical and parasitological outcomes are the main sources of information on which national malaria control programmes base treatment policy; however, other studies are needed to confirm drug resistance if suspected." -- Introduction.

Download or read book The Travel and Tropical Medicine Manual E Book written by Christopher A. Sanford and published by Elsevier Health Sciences. This book was released on 2016-08-07 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prevent, evaluate, and manage diseases that can be acquired in tropical environments and foreign countries with The Travel and Tropical Medicine Manual. This pragmatic resource equips medical providers with the knowledge they need to offer effective aid, covering key topics in pre- and post-travel medicine, caring for immigrants and refugees, and working in low-resource settings. It's also the perfect source for travelers seeking quick, easy access to the latest travel medicine information. Dynamic images illustrate key concepts for an enhanced visual understanding. Evidence-based treatment recommendations enable you to manage diseases confidently. This eBook allows you to search all of the text, figures, images, and references from the book on a variety of devices. Highlights new evidence and content surrounding mental health and traveling. Covers emerging hot topics such as Ebola virus disease, viral hemorrhagic fevers, the role of point-of-care testing in travel medicine, and antibiotic-resistant bacteria in returning travelers and students traveling abroad. Includes an enhanced drug appendix in the back of the book.

Download or read book Global Report on Antimalarial Drug Efficacy and Drug Resistance written by and published by . This book was released on 2010 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report provides a comprehensive, global overview of antimalarial drug efficacy and the resistance of malaria parasites to the antimalarial medicines used between 2000 and June 2010. Policy-makers in national ministries of health will benefit from this document, as it provides both a global and a regional picture of the efficacy of the antimalarial medicines currently used in national treatment programmes. In addition, the report will be a reference for scientists, enhancing their understanding of the complexity of antimalarial drug resistance.

Download or read book Structural Investigation of Plasmodium Falciparum Chloroquine Resistance Transporter in the Context of Anti Malarial Drug Resistance written by Jonathan Young Kim and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: All CQ resistance-conferring PfCRT isoforms share the K76T mutation, which is widely used as a molecular marker for CQ resistance. Despite the significance in the impact of drug-resistant malaria, a detailed understanding of PfCRT physiological function and the molecular basis of PfCRT-mediated drug resistance have been hampered by a lack of high-resolution structural information. This dissertation describes the first structure of PfCRT and reveals the interaction of drugs with the purified and reconstituted protein. We determined the structure of the 49-kDa PfCRT 7G8, a clinically relevant CQ-resistant isoform found in South America, to 3.2 Å resolution by single-particle cryo-electron microscopy (cryo-EM), in complex with a specific antigen-binding fragment (Fab) to overcome current size limitations in cryo-EM. Our PfCRT structure displays an inward-open conformation, consists of 10 transmembrane (TM) helices with an inverted topology, and has unique elements including two juxtamembrane helices and a highly conserved cysteine-rich loop between TM helix 7 and 8.

Download or read book Advances in Malaria Research written by Deepak Gaur and published by John Wiley & Sons. This book was released on 2016-12-27 with total page 611 pages. Available in PDF, EPUB and Kindle. Book excerpt: Thoroughly reviews our current understanding of malarial biology Explores the subject with insights from post-genomic technologies Looks broadly at the disease, vectors of infection, and treatment and prevention strategies A timely publication with chapters written by global researchers leaders

Download or read book Guidelines for the Treatment of Malaria Third Edition written by World Health Organization and published by World Health Organization. This book was released on 2015-08-13 with total page 317 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malaria remains an important cause of illness and death in children and adults in countries in which it is endemic. Malaria control requires an integrated approach including prevention (primarily vector control) and prompt treatment with effective antimalarial agents. Malaria case management consisting of prompt diagnosis and effective treatment remains a vital component of malaria control and elimination strategies. Since the publication of the first edition of the Guidelines for the treatment of malaria in 2006 and the second edition in 2010 all countries in which P. falciparum malaria is endemic have progressively updated their treatment policy from use of ineffective monotherapy to the currently recommended artemisinin-based combination therapies (ACT). This has contributed substantially to current reductions in global morbidity and mortality from malaria. Unfortunately resistance to artemisinins has arisen recently in P. falciparum in South-East Asia which threatens these gains. This third edition of the WHO Guidelines for the treatment of malaria contains updated recommendations based on a firmer evidence base for most antimalarial drugs and in addition include recommendation on the use of drugs to prevent malaria in groups at high risk. The Guidelines provide a framework for designing specific detailed national treatment protocols taking into account local patterns of resistance to antimalarial drugs and health service capacity. It provides recommendations on treatment of uncomplicated and severe malaria in all age groups all endemic areas in special populations and several complex situations. In addition on the use of antimalarial drugs as preventive therapy in healthy people living in malaria-endemic areas who are high risk in order to reduce morbidity and mortality from malaria. The Guidelines are designed primarily for policy-makers in ministries of health who formulate country-specific treatment guidelines. Other groups that may find them useful include health professionals and public health and policy specialists that are partners in health or malaria control and the pharmaceutical industry. The treatment recommendations in the main document are brief; for those who wish to study the evidence base in more detail a series of annexes is provided with references to the appropriate sections of the main document.

Download or read book Malaria Control and Elimination written by Frédéric Ariey and published by Methods in Molecular Biology. This book was released on 2020-07-17 with total page 341 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Activities of Various Antimalarial Drugs on Plasmodium Falciparum Isolates from Kilifi Kenya and Studies on Mechanisms of Resistance written by Leah Wanjiru Mwai and published by . This book was released on 2011 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Drug resistance is a significant challenge in the fight against malaria. Importantly, reduced efficacy has been reported against artemether (ATM)/Lumefantrine (LM) (LM-ATM), amodiaquine (AQ)/artesunate (AS) (AQ-AS), two important combination treatment regimens in Africa, and against piperaquine (PQ), a drug which has been evaluated as a potential alternative in Africa, in combination with dihydroarteminisin (DHA). Chloroquine (CQ) resistance in Pfalciparum is associated with two main transporters PfCRT and PfMDRl. I investigated the mechanisms of resistance to PQ, LM and AQ, with the overall goal of identifying molecular markers that can be used to track resistance. I used CQ as a reference. The key antimalarial drugs were highly active against clinical isolates from Kilifi, Kenya with median inhibitory concentrations (IC50s) of 5nM for DHA and 55 nM for CQ, AQ, PQ, LM and D EA Q (desethylamodiaquine, the active metabolite of A Q). pfert -7 6 and pfmdr 1-8 6 mutations were associated with AQ, DEAQ and LM but not DHA or PQ activity. Interestingly, 20% of analysed isolates had decreased susceptibility to LM (IC50 1 OOnM); these isolates were the most susceptible to CQ and carried wild type genotypes atpfert-76 andpfmdr1-86. I observed that CQ resistance had been declining in Kilifi since 1993 (prior to CQ withdrawal) to 2006 (7 years after its withdrawal), similar to observations in Malawi. My results support the hypothesis that susceptibility to antimalarial drugs returns when drug pressure is removed, and suggest that the use of LM-ATM may hasten the return of CQ susceptibility. Continued monitoring of drug susceptibility is crucial. pfert-76 and pfmdr1-86 may be useful molecular markers of LM-ATM efficacy in Kilifi and other African sites. Using a micro array approach, I identified additional genes (including various transporters) that may contribute to LM resistance. I recommend further studies to clarify the exact roles of the identified genes.

Download or read book Towards Malaria Elimination written by Sylvie Manguin and published by BoD – Books on Demand. This book was released on 2018-07-18 with total page 454 pages. Available in PDF, EPUB and Kindle. Book excerpt: Towards Malaria Elimination - A Leap Forward was started to mark the occasion for renewed commitment to end malaria transmission for good (the WHO's call for "Malaria Free World" by 2030). This book is dedicated for the benefit of researchers, scientists, program and policy managers, students and anyone interested in malaria and other mosquito-borne diseases with the goal of sharing recent information on success stories, innovative control approaches and challenges in different regions of the world. Some main issues that emerged included multidrug-resistant malaria and pandemic risk, vaccines, cross-border malaria, asymptomatic parasite reservoir, the threat of Plasmodium vivax and Plasmodium knowlesi, insecticide resistance in Anopheles vectors and outdoor malaria transmission. This book is one little step forward to bring together in 17 chapters the experiences of malaria-expert researchers from five continents to present updated information on disease epidemiology and control at the national/regional level, highlighting the constraints, challenges, accomplishments and prospects of malaria elimination.

Download or read book Drug Targets for Plasmodium Falciparum Historic to Future Perspectives written by Mohammed Tarique and published by Springer Nature. This book was released on with total page 205 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bacterial Adaptation to Co resistance written by Santi M. Mandal and published by Springer Nature. This book was released on 2019-11-17 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proposed book aims to understand the mechanism of survival of microorganisms in response to chemical stress in various ecological niches that suffer direct human intervention, more so the agricultural, domestic and hospital settings. Microbicides (e.g. disinfectants, antiseptics, fungicides, algaecides, insecticides and pesticides) are used rampantly to control undesirable microbes. Insecticides and pesticides are routinely used in agriculture which directly affect the microbial population in farms, orchards and fields. Health care environments are always stressed with disinfectants and antibiotics. It is always probable that microbicide-stressed microorganisms are in a dynamic state, displaced from one niche to the other. Some soil and water borne bacteria or their resistance determinants are also getting prominence in hospital settings after suffering selective pressure from agricides. In order to reveal the survival strategies of microbicidal-resistant microbes, it is of prime importance to know the mode of action of these complete range of microbicides (agricides to antibiotics). The present book intends to address these issues. There will be several chapters dealing with tolerance and cross resistance in microbes and bacteria in particular, dwelling in various niches. Till date, there is no consensus among scientists in theorizing molecular mechanisms to explain bacterial tolerance and their cross resistance to agricides and antibiotics.

Download or read book Mechanisms of Drug Resistance in Plasmodium Falciparum written by and published by . This book was released on 1994 with total page 69 pages. Available in PDF, EPUB and Kindle. Book excerpt: Malaria continues as a major health threat throughout the tropical world and potential demand for antimalarials is higher than for any other medication yet the world faces a crisis--drug resistance is emerging and spreading faster than drugs are being developed and the flow in the pipeline of new drugs has all but stopped. This represents a particular threat to the US military. In a short time there may be parts of the world where no effective antimalarial drug is available. The recent emergence of multidrug resistant malaria parasites has intensified this problem. The goal of this work is to use a molecular genetic approach in the investigation of mechanisms of drug resistance and subsequently to use this information in the identification and development of new antimalarial drugs. These studies were initiated based on the observation that one mechanism of drug resistance in P. falciparum may be similar to multidrug resistance in cancer. During this work, we identified and fully characterized two mdr-like genes in P. falciparum, pfmdrl and pfmdr2 and have found an association with the amplification and over expression of one of these genes, pfmdrl with mefloquine resistance and multidrug resistant parasites both in laboratory derived and field isolated strains of Plasmodium falciparum. As a next step in this work, we have initiated the development methods of functional analysis which are critical both to developing and testing new chemotherapeutic interventions. Malaria, Drug resistance, Recombinant DNA, Tropical disease, Infectious disease.