This book presents the most important issues related to infections with Mycoplasma bovis, an etiological agent of many disorders in cattle, such as bronchopneumonia, mastitis, arthritis, otitis, keratoconjunctivitis, meningitis, and endocarditis. It consists of one review and eight research articles that discuss lung local immunity in experimental M. bovis pneumonia, antimicrobial susceptibility of M. bovis isolates, aspects related to M. bovis antibody testing, new data on the efficacy of seminal extender in M. bovis, as well as the importance of imported bull examination for this pathogen.

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Gonorrhea is a sexually transmitted infection caused by the obligate human pathogen“Neisseria gonorrhoeae”. This Gram-negative diplococcus is highly infective due to its virulence factors: pili, Por proteins, Opa proteins, Rmp proteins, lipooligosaccharides and IgA protease. Despite existing guidelines for its treatment, the incidence of the disease follows an increasing trend worldwide. This is mainly due to the appearance of antibiotic-resistant strains, inefficient diagnostic methods and poor sexual education. Without an effective vaccine available, the key priorities for the control of the disease include sexual education, contact notification, epidemiological surveillance, diagnosis and effective antibiotic treatment. This Special Issue focuses on some of these important issuesm such as the molecular mechanisms of the disease, diagnostic tests and different treatment strategies used to combat gonorrhea.

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Vaccines have been one of the most important medical discoveries of the last three centuries. Thanks to their development, millions of deaths have been avoided. Together with improved hygiene and antibiotics, vaccines have significantly contributed to the prolongation of life expectancy in high-income countries to a current average of 85 years, compared to 47 years in 1900. However, the continued success of vaccination has recently been hampered due to changes in the perception of vaccines within society. Therefore, there is a critical need to better understand (i) what has been achieved by vaccination thus far and (ii) what is important to further develop vaccines in a world where increased population, aging, travel, urbanization and climate change favor the emergence, evolution and spread of old and new pathogens. In this Research Topic, we gather articles that discuss numerous questions and problems associated with vaccines. The future of vaccine development needs to take in account changing perspectives within our society and that the acceptance of preventative medicine may also change in the years to come.

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Acinetobacter baumannii is a formidable global pathogen notorious for its widespread drug-resistant nature. It is a major culprit in various infections, particularly targeting immunocompromised individuals in intensive care units (ICUs). A paramount concern associated with this pathogen lies in its remarkable ability to develop resistance to nearly all clinically utilized antibiotics. Furthermore, it exhibits a concerning propensity to disseminate this resistance rapidly, transcending borders and impacting healthcare facilities across diverse economic strata. Of particular focus is the carbapenem-resistant strain of A. baumannii (CRAb). This strain has garnered the top spot on the World Health Organization's (WHO) list of pathogens, necessitating urgent attention for new treatment development. This book delves into numerous studies underscoring the pivotal role of A. baumannii as one of the most impactful bacteria contributing to Healthcare-Associated Infections (HAIs) within the contemporary healthcare landscape.

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ADP-ribosylation was discovered over 60 years ago, and much of the research focused on bacterial toxins that employed ADP-ribosylation to kill host cells. However, in the last 20 years, the field has identified many cases where host-mediated ADP-ribosylation can either promote or repress pathogenic infections. It is clear that ADP-ribosylation is a key component of the innate immune response in eukaryotes and bacteria, and many of the mechanistic details of how ADP-ribosylation impacts pathogens have yet to be uncovered. In this Special Issue, we have focused on publishing unique reviews and primary research on the topics of pathogens and ADP-ribosylation. We hope that you will enjoy this collection.

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This book Advances in Colloid Science covers a number of up-to-date research advancement and progresses on colloids. It is a promising novel research field that has acknowledged a lot of interest recently. Here, the exciting scientific reports on cutting edge of science and technology associated to facile and economical synthesis, self-assembly, wettability, liquid crystallinity, physical properties, adoptions, morphology, control, drug design, structural properties, and prospective biological and optical implementation of newly designed colloids are concluded. This book presents an overview of recent and current colloidal study of fundamental and significant applications and implementation research worldwide. The colloidal science offers significant new and exciting challenges in biomedical, chemical, physical, and technological field. It is an important booklet for research organizations, governmental research centers, academic libraries, and R&D affianced in recent research and advancement of colloids.

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

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In the context of disease pathogenesis, it has been observed that after inadequate administration of antibiotics, animals become more susceptible to intestinal colonization and organ invasion by enteropathogens, these could be related to changes caused in the gastrointestinal microbial community. Therefore, we must reconsider the negative consequences that disruption of the microbiome has in the biology of metazoans (dysbacteriosis). Alternations of the intestinal microbiota composition in animals can be caused by multiple factors, including the misuse of antibiotics, having as a result a negative impact on the development and function of the immune, endocrine, nervous, and digestive systems. For this reason, social concerns regarding the development of antibiotic-resistant microorganisms have resulted in an urgent necessity to find feasible alternatives to maintain animal health and performance without the use of antibiotic growth promoters (AGP), in order to sustain livestock production as an economically viable source of food for human consumption. Hence, research about AGP alternatives such as probiotics, prebiotics, phytochemicals, organic acids, enzymes, and vaccines has become a priority for many scientists around the world.

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Antibiotic resistance represents one of the most important challenges in the world and involves humans, animals and the environment.For this reason, it is increasingly important to focus our attention on the present scenarios and the future prospects relating to this problem. The One Health approach helps us and can provide the tools to consider the problem from different points of view, also providing alternative solutions to the use of the antibiotic itself.

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The second edition of this Special Issue, entitled “Antimicrobial and Anti-Infective Activity of Natural Products”, contains 12 research and 2 review articles. They present recent advancements in the discovery of bioactive compounds from plants, essential oils, and microbial metabolites. These contributions discuss the mechanisms of action, highlighting anti-virulence strategies, biofilm inhibition, and immunomodulatory effects. Furthermore, this collection explores synergistic associations with conventional antibiotics and integrates in silico, in vitro, and in vivo evidence. This volume provides critical insights into the clinical prospects of natural products in combating the growing threat of antimicrobial resistance.

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Biomaterials can be used as implantable devices or drug delivery platforms with a significant influence on a patients’ quality of life. Indeed, every year a substantial number of new biomaterials and scaffolding systems are engineered and introduced in the biomedical field with increased potential for biomedical uses. However, their long-term use can be threatened by the adhesion and proliferation of microorganisms, which can interact and form biofilms, or the formation of fibrosis, with cytotoxic responses being very common. Pathogenic microorganisms may cause local infection and consequent implant failure; furthermore, they can hinder the delivery of therapeutic molecules by specialized delivery platforms, turning them ineffective. Many alternatives have been proposed over the years to prevent such events, including the use of antiseptics and antibiotics or the physical modification of the biomaterial surface, with the incorporation of biomolecules of interest. From specialized polymers and functional groups to silver and, more recently, antimicrobial peptides and natural extracts, different functionalization/modification techniques have been employed in this fight against pathogenic agents.

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This Antimicrobial Prescribing and Stewardship Issue (volume 1) consist of manuscripts, including original research, review articles, case series, and opinion papers for topics related to antimicrobial (antibiotic, antifungal) stewardship, including: Disease-based/organism-based antimicrobial stewardship;Diagnostic stewardship;Influence of antimicrobial utilisation changes in antimicrobial resistance;Impact of antimicrobial stewardship on quality performance measures and patient outcomes;Novel antimicrobial stewardship education and training approaches or interventions aimed at the public and/or healthcare workers;Behavioural change approaches to antimicrobial stewardship;Collaborative practice agreements in antimicrobial stewardship;Antimicrobial stewardship in special populations (e.g., paediatrics, geriatrics, emergency medicine, hematology/oncology);Tackling AMR through antimicrobial stewardship in low- and middle-income countries;Antimicrobial stewardship for animal health;Antimicrobial stewardship in alternative settings (e.g., community practice, long-term care, and resource-limited small and rural hospitals);Antimicrobial use and stewardship in the context of the COVID-19 pandemic;Global collaborations to tackle AMR through antimicrobial stewardship.

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The second volume of the Special Issue entitled “Antimicrobial Prescribing and Stewardship” consists of manuscripts, including original research articles, review articles, and opinion papers regarding antimicrobial stewardship-related topics, including disease-based/organism-based antimicrobial stewardship; the influence of antimicrobial utilization changes on antimicrobial resistance; the impact of antimicrobial stewardship on quality performance measures and patient outcomes; novel antimicrobial stewardship education and training approaches or interventions aimed toward the public and/or healthcare workers; behavioral change approaches to antimicrobial stewardship; collaborative practice agreements in antimicrobial stewardship; antimicrobial stewardship in special populations (e.g., pediatrics, geriatrics, emergency medicine, hematology/oncology); tackling AMR through antimicrobial stewardship in low- and middle-income countries; antimicrobial stewardship for animal health; antimicrobial stewardship in alternative settings (e.g., community practice, long-term care, resource-limited settings, small and rural hospitals); antimicrobial use and stewardship in the context of the COVID-19 pandemic; and global collaborations to tackle AMR through antimicrobial stewardship.

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The worldwide dissemination of antimicrobial-resistant bacteria, particularly those resistant to last-resource antibiotics, is a common problem to which no immediate solution is foreseen. In 2017, the World Health Organization (WHO) published a list of antimicrobial-resistant "priority pathogens", which include a group of microorganisms with high-level resistance to multiple drugs, named ESKAPE pathogens, comprising vancomycin-resistant Enterococcus faecium (VRE), methicillin- and vancomycin-resistant Staphylococcus aureus (MRSA and VRSA), extended spectrum β-lactamase (ESBL) or carbapenem-resistant Klebsiella pneumoniae, carbapenem-resistant Acinetobacter baumannii, carbapenem-resistant Pseudomonas aeruginosa and extended spectrum β-lactamase (ESBL) or carbapenem-resistant Enterobacter spp. These bacteria also have the ability to produce several virulence factors, which have a major influence on the outcomes of infectious diseases. Bacterial resistance and virulence are interrelated, since antibiotics pressure may influence bacterial virulence gene expression and, consequently, infection pathogenesis. Additionally, some virulence factors contribute to an increased resistance ability, as observed in biofilm-producing strains. The surveillance of important resistant and virulent clones and associated mobile genetic elements is essential to decision making in terms of mitigation measures to be applied for the prevention of such infections in both human and veterinary medicine, being also relevant to address the role of natural environments as important components of the dissemination cycle of these strains.

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The worldwide emergence of antimicrobial-resistant bacteria, specially those resistant to last-resource antibiotics, is now a common problem being defined as one of three priorities for the safeguarding of One Health by the Tripartite Alliance, which includes the World Health Organization (WHO), the Food and Agriculture Organization (FAO) and the Office International des Epizooties (OIE). Bacteria resistance profiles, together with the expression of specific virulence markers, have a major influence on the outcomes of infectious diseases. These bacterial traits are interconnected, since not only the presence of antibiotics may influence bacterial virulence gene expression and consequently infection pathogenesis, but some virulence factors may also contribute to an increased bacterial resistance ability, as observed in biofilm-producing strains. The surveillance of important resistant and virulent clones and associated mobile genetic elements is essential for decision making in terms of mitigation measures to be applied for the prevention of such infections in both human and veterinary medicine. However, the role of natural environments as important components of the dissemination cycle of these strains has not been consider until recently. This Special Issue aims to publish manuscripts that contribute to the understanding of the impact of bacterial antimicrobial resistance and virulence in the three areas of the One Health triad–i.e., animal, human and environmental health.

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

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This Special Issue on Antimicrobial Resistance in Environmental Waters features 11 articles on the monitoring and surveillance of antimicrobial resistance (AMR) in natural aquatic systems (i.e., reservoirs, rivers), and effluent discharge from water treatment plants to assess the effectiveness of AMR removal and resulting loads in treated waters. Some of the key elements of AMR studies presented in this Special Issue highlight the underlying drivers of AMR contamination in the environment and the evaluation of the hazard imposed on aquatic organisms in receiving environments through ecological risk assessments. As described in this Issue, screening antimicrobial peptide (AMP) libraries for biofilm disruption and antimicrobial candidates are promising avenues for the development of new treatment options to eradicate resistance.

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Antimicrobial resistance (AMR) is a global problem with extremely complex epidemiology involving the direct and indirect transmission of antibiotic resistant pathogens and mobile genetic elements between humans, animals, and the environment. AMR is, therefore, recognized as a ‘One Health’ issue. Data that describe AMR prevalence and trends are required to enable the judicious and prudent use of antimicrobials in animals, which has implications both from veterinary and animal welfare aspects as well as from a zoonotic and public health perspective. Horses are a potential reservoir of AMR for humans due to close human–animal contact, as was demonstrated with shared human and horse methicillin-resistant Staphylococcus aureus (MRSA) strains causing outbreaks in equine hospitals. Extended-spectrum beta-lactamase-producing Enterobacteriaceae, considered as clinically and economically important to the AMR burden in human and veterinary medicine, has been reported in both community and clinic equine populations. Strains of Enterobacteriaceae pose a major worldwide threat due to the geographical expansion of ESBL-producing clones as well as the horizontal interspecies dissemination of ESBL-encoding plasmids and genes. In human medicine, ESBL-E infection is associated with increased morbidity, mortality, length of hospital stay, delay of targeted appropriate treatment, and higher costs. These issues also need to be addressed in horses. This Special Issue on AMR in horses encompasses several papers that describe the prevalence, risk factors, and molecular data on MDR bacteria in healthy horses in Canada, Japan, Spain, and Israel, in addition to papers that describe the clinical impact of MDR bacteria in diseased horses in Austria, USA, France and Israel.

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Antimicrobial resistance is the intrinsic capability of microorganisms to survive unfavorable conditions; such traits are mainly transferrable through movable genetic elements, enabling the rapid and homogeneous diffusion of resistance genes over diverse ecosystems and sectors including human medicine, veterinary medicine, and the environment. In this view, the One Health approach allows for a comprehensive depiction of the mechanisms responsible for the onset and spread of antimicrobial resistance traits, as well as enabling a clear definition of the dynamics that occurs among microbial members harboring diverse ecological niches that favor the orthogonal diffusion of antibiotic resistance between apparently separate milieus.

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Antimicrobial use is one of the main drivers of antimicrobial resistance (AMR), a crisis threatening modern medicine. To combat and reverse AMR, finding determinants of resistance development/antibiotic use, identifying the target points of interventions, and implementing antibiotic stewardship measures are crucial. This Special Issue disseminates a wide variety of research conducted by various study designs and diverse settings and populations. It includes studies: Focusing on the role of antibiotics/antibacterials on specific diseases; Reporting the effect of antibiotic stewardship interventions on different outcomes; Describing the quality of prophylactic antibiotic use in a patient-specific population; Identifying determinants of antibiotic use in the elderly or resistance development in specific bacteria; Introducing a novel reporting tool for auditing antibiotic dispensing practice.

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Today, the food and water that we encounter in any part of the world could contain antibiotic residues and/or antibiotic-resistant bacteria. This book presents research evidence for this and also a potential way to mitigate the problem. Although not presented in this book, it is likely that this situation exists for all other types of antimicrobial agents as well, including antivirals, antifungals, and antiprotozoal agents. The presence of antibiotic residues and/or antibiotic-resistant bacteria contributes to the generation and propagation of resistance in disease-causing pathogens in humans and animals. Therefore, the medicines that we use to treat and/or prevent infections will not work as expected in many cases. It is estimated that if we do not contain antimicrobial resistance urgently, by 2050, up to 10 million people will die due to bacterial infectious diseases, such as pneumonia, skin infections, urinary tract infections, etc., which were once easily treatable. However, this book presents a system that can eliminate resistant bacteria and antibiotics from the environment, with the potential to work on other environmental microbes and antimicrobials. This book opens pathways for academics and scientists to do further research on antimicrobials and antimicrobial-resistant bacteria in various environmental areas and also presents evidence for policymakers to take further action and make the general public aware of the current situation in this context.

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Bacterial sexually transmitted infections (STIs) are among the most widespread infections worldwide, causing major health problems. Bacterial Sexually Transmitted Infections - New Findings, Diagnosis, Treatment, and Prevention is a collection of chapters written by experts in the field from all over the globe. It includes recent scientific knowledge and advances in various approaches to the diagnosis, control, treatment, and management of bacterial STIs, depending on available resources and facilities. It presents research from the literature as well as different viewpoints to open new perspectives in this field. It is designed to improve the knowledge of those interested in bacterial STIs and new methods for their diagnosis and treatment.

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There is talk of an upcoming antibiotic armageddon, with untreatable post-operative infections, and similarly untreatable complications after chemotherapy. Indeed, the now famous “O’Neill Report” (https://amr-review.org/) suggests that, by 2050, more people might die from antibiotic-resistant bacterial infections than from cancer. While we are still learning all the subtle drivers of antibiotic resistance, it seems increasingly clear that we need to take a “one health” approach, curtailing the use of antibiotics in both human and veterinary medicine. However, there are no new classes of antibiotics on our horizon. Maybe something that has been around “forever” can come to our rescue—bacteriophages! Nevertheless, it is also necessary to do things differently, and use these new antimicrobials appropriately. Therefore, an in-depth study of bacteriophage biology and case-by-case applications might be required. Whilst by no means comprehensive, this book does cover some of the many topics related to bacteriophages as antimicrobials, including their use in human therapy and aquaculture. It also explores the potential use of phage endolysins as substitutes of antibiotics in two sectors where there is an urgent need—human therapy and the agro-food industry. Last but not least, there is an excellent perspective article on phage therapy implementation.

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The use of medical devices (e.g., catheters, implants, and probes) is a common and essential part of medical care for both diagnostic and therapeutic purposes. However, these devices quite frequently lead to the incidence of infections due to the colonization of their abiotic surfaces by biofilm-growing microorganisms, which are progressively resistant to antimicrobial therapies. Several methods based on anti-infective biomaterials that repel microbes have been developed to combat device-related infections. Among these strategies, surface coating with antibiotics (e.g., beta-lactams), natural compounds (e.g., polyphenols), or inorganic elements (e.g., silver and copper nanoparticles) has been widely recognized as exhibiting broad-spectrum bactericidal or bacteriostatic activity. So, in order to achieve a better therapeutic response, it is crucial to understand how these infections are different from others. This will allow us to find new biomaterials characterized by antifouling coatings with repellent properties or low adhesion towards microorganisms, or antimicrobial coatings that are capable of killing microbes approaching the surface, improving biomaterial functionalization strategies and supporting tissues’ bio-integration.

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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact

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Carbapenem-resistant Enterobacterales (CRE) are a common cause of infections in both community and healthcare settings and have become an increasing threat to public health worldwide. The focus of this Special Issue includes aspects concerning plasmid-mediated antimicrobial resistance along with other carbapenem resistance mechanisms. Understanding the prevalence and routes of transmission of CRE is important in developing specific interventions for healthcare facilities, as well as the general impact of CRE circulation on the environment. Attention has also been focused on carbapenemase testing in order to provide advanced phenotypic and molecular assays for the identification of CRE, as a valid tool for active global surveillance, and from this perspective, the study of resistance mechanisms can provide significant support for the development of new and appropriate antimicrobial molecules. For all of these reasons, the phenomenon of carbapenem resistance deserves more attention, for the sake of public health.

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The Special Issue of the journal Diagnostics entitled “Challenges and Advances in Tuberculosis and Mycobacterial Lung Diseases” encompasses research articles, case presentations, and literature reviews concerning the epidemiology, medical surveillance, as well as diagnostic and therapeutic challenges in tuberculosis (TB) and in the infections caused by non-tuberculous mycobacteria (NTM ). The articles present the current status of knowledge concerning the use of molecular tests and genotyping of M. tuberculosis for the rapid identification of MDR and XDR clones, the advances in the identification of NTM and their differentiation to the species level, as well as clinical studies performed in TB and NTM risk groups. In addition, a summary of current recommendations concerning diagnosis and treatment of tuberculous pericarditis is presented.

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Essential oils extracted by the distillation or hydrodistillation of aromatic plants are a complex mixture of volatile compounds with several biological activities. Their efficacy as antimicrobial agents is related to the activity of several natural compounds belonging to different chemical families that can act both in synergy with each other and with other antibiotics. The antibiotic resistance detected among pathogens has been quickly increasing in recent years, and the control of some of these microorganisms is becoming a planetary emergency for human and animal health. The control of the microbial growth is a problem of great importance also for the food industry (food deterioration and shelf life extension) and for the world of cultural heritage (indoor and outdoor phenomena of biodeterioration). Essential oils can play an important role in this scenario, due their recognized broad-spectrum antimicrobial activity. Therefore, the main subject of this Special Issue includes an essential oil-based approach to control microrganisms in areas such as human and veterinary medicine, entomology, food industry and agriculture. In addition, the chemical composition of essential oils from endemic and rare medicinal/aromatic plants, nanoformulations of essential oils, applications in human and veterinary medicine and its use as animal feeding supplements are topics covered in this Special Issue

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Antimicrobial resistance remains a major concern in medicine, especially during the COVID-19 pandemic, where microbial infections were frequent complications. To combat drug-resistant pathogens, there has been a renewed interest in the use of antimicrobial peptides (AMPs). This reprint focuses on the in-silico approaches used for the rational discovery and design of AMPs. Such computational methodologies range from classical homology-based and machine-learning prediction algorithms to complex similarity networks and evolutionary algorithms that use models of sequence evolution. Furthermore, the reprint explores the improvement of high-throughput screening techniques in the discovery of AMPs from biological samples, which has also led to the evolution of computational approaches that aid in this biodiscovery process. The reprint contains original research and review papers, which serve as valuable references for researchers dedicated to peptide drug development.

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We cannot analyze endemic mycoses as we did just a few years ago. These fungal diseases have acquired much larger importance, and many have disseminated to novel areas of the globe. Immunosuppression has put additional patients at risk. Moreover, diagnosis has now been improved via antigen detection and/or molecular techniques, and innovations in treatment have also occurred. This reprint deals specifically with recent advances in the epidemiology, diagnosis, and treatment of endemic mycoses.

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This Open Access volume provides in-depth analysis of the wide range of ethical issues associated with drug-resistant infectious diseases. Antimicrobial resistance (AMR) is widely recognized to be one of the greatest threats to global public health in coming decades; and it has thus become a major topic of discussion among leading bioethicists and scholars from related disciplines including economics, epidemiology, law, and political theory. Topics covered in this volume include responsible use of antimicrobials; control of multi-resistant hospital-acquired infections; privacy and data collection; antibiotic use in childhood and at the end of life; agricultural and veterinary sources of resistance; resistant HIV, tuberculosis, and malaria; mandatory treatment; and trade-offs between current and future generations. As the first book focused on ethical issues associated with drug resistance, it makes a timely contribution to debates regarding practice and policy that are of crucial importance to global public health in the 21st century.

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There has been much speculation about a possible antibiotic Armageddon; this would be the result of having untreatable post-operative infections, and similarly untreatable complications after chemotherapy. The now famous “O’Neill Report” (https://amr-review.org/) suggests that more people could die from resistant bacterial infections by 2050 than from cancer. We are still learning about all the subtle drivers of antibiotic resistance, and realizing that we need a single “whole of health” co-ordinated policy. We ingest what we sometimes feed to animals. There do not seem to be any new classes of antibiotics on our horizon. Perhaps something that has been around “forever” will come to our rescue—bacteriophages! Nevertheless, we have to do things differently, use antibiotics appropriately, for the correct indication, for the correct duration and with the correct dose, and with that, practice good antibiotic stewardship. Whilst by no means comprehensive, this book does cover some of the many topics of antibiotic stewardship. It also addresses some of the older antibiotics, some new combinations, and even some new agents. Last, and by no means least, there are two excellent articles on bacteriophages.

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