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Staphylococcus aureus is a coccus, gram-positive, non-spore forming, and non-motile bacterium. Its commensal and opportunistic capabilities make it able to colonize different sites of animals and humans. Resistance to antibiotics has resulted in development of new strains and new types within strains. Types of methicillin-resistant S. aureus (MRSA) include hospital-acquired MRSA (HA-MRSA), community-acquired MRSA (CA-MRSA), and livestock-acquired MRSA (LA-MRSA). There are also new strains like vancomycin-resistant S. aureus (VRSA) and vancomycin-intermediate S. aureus (VISA). Expansion in resistance is expected to give rise to newer strains resistant to antibiotics such as macrolide (erm gene), tetracycline (tet genes), mupirocin (mupR), and fusidic acid (fusD). Alternative approaches like nanoparticles, bacteriophages, phytochemicals, and more are required to tackle this pathogen. This book contains information on epidemiology, resistance mechanisms, and alternative ways to curtail S. aureus infection, as well as future research opportunities.
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Resistance to tuberculosis (TB) drugs is a formidable obstacle to effective TB care and prevention globally. Multidrug-resistant TB (MDR-TB) is multifactorial and fuelled by improper treatment of patients, poor management of supply and quality of drugs, and airborne transmission of bacteria in public places. Case management becomes difficult and the challenge is compounded by catastrophic economic and social costs that patients incur while seeking help and on treatment. In 2006, MDR-TB strains with additional resistance to second-line drugs were described as extensively drug-resistant TB (XDR-TB) strains, further compromising treatment options available to patients infected with these strains. Since then, clinicians in some settings have reported patients infected with strains in which virtually all treatment options have been exhausted. This rapidly evolving landscape is a clarion call to policy-makers and practitioners to respond with improvements in care delivery and introduction of innovative tools and approaches. In 2009, the 62nd World Health Assembly urged WHO Member States to provide universal access to care for drug-resistant TB patients. In that resolution, it was acknowledged that national TB programme managers, clinicians, nurses, all care providers and affected people themselves need guidance on how best to bring together different elements of health systems and services needed to effectively address the MDR-TB challenge. Therefore, this Handbook has been developed for the purpose of describing ways to implement established WHO policies relevant for the management of MDR-TB. These WHO policy recommendations have been produced using the GRADE methodology for evidence assessment, as adopted by WHO in 2008.
Drug resistance. --- Tuberculosis --- Treatment.
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This dissertation explores the effects of ErbB-targeted therapies on malignant melanoma, a rapidly increasing form of cancer. The study focuses on the use of tyrosine kinase inhibitors, gefitinib and canertinib, to inhibit tumor growth and examine their effects on cell proliferation, survival, and receptor phosphorylation in melanoma cell lines. It also investigates the mechanisms of resistance to gefitinib and suggests potential strategies for overcoming this resistance, such as using irreversible inhibitors like canertinib. The research aims to contribute to the development of improved treatment strategies for advanced melanoma, especially for patients without BRAF or NRAS mutations. This work is intended for oncology researchers and clinicians seeking to enhance melanoma treatment outcomes.
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The WHO Malaria Policy Advisory Group (MPAG) convened in March 2022 to review and provide strategic guidance on malaria control and elimination efforts globally. Key topics included updates on the RTS,S malaria vaccine, the operational manual for subnational malaria tailoring, and strategies to address antimalarial drug resistance, particularly in Africa. The meeting highlighted progress and challenges in malaria control, emphasizing the need for immediate action to meet the 2030 targets of reducing global malaria incidence and mortality by 90%. The report underscores the uneven progress across countries, with significant setbacks in high-burden regions exacerbated by COVID-19 disruptions.
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The World Health Organization's report on the ninth meeting of the Working Group on Monitoring of Neglected Tropical Diseases Drug Efficacy focuses on strategies to combat helminth infections and trachoma. The report discusses the efficacy of drugs like praziquantel, albendazole, and mebendazole, highlighting the risk of emerging drug resistance due to extensive use in preventive chemotherapy programs. It includes evaluations of drug efficacy trials conducted in various countries, updates on drug development, and recommendations for monitoring and assessing anthelminthic drug efficacy. The document aims to guide public health strategies and is intended for researchers, healthcare professionals, and policymakers involved in global health and disease prevention.
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This publication by the World Health Organization provides comprehensive guidance on the surveillance of drug resistance in tuberculosis. The sixth edition offers updated methodologies and strategies for accurate diagnosis and treatment, emphasizing universal drug testing to combat TB effectively. It aims to support global efforts in line with the End TB Strategy and the Sustainable Development Goals to eradicate the TB epidemic by 2030. The document is intended for health professionals, policymakers, and researchers involved in TB control and prevention, offering insights into surveillance techniques, laboratory methods, and data management practices.
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