Chronic wounds, including diabetic foot ulcers, pressure ulcers, and venous leg ulcers, remain a global healthcare burden due to persistent inflammation, impaired tissue repair, and high susceptibility to infection. The rise of antibiotic-resistant pathogens and the prevalence of biofilms in these wounds have limited the effectiveness of conventional therapies, highlighting the need for advanced strategies that simultaneously control infection and promote healing. Biomaterial-based approaches have emerged as promising solutions, offering multifunctional platforms that combine antimicrobial activity with regenerative support. Natural and synthetic polymers, antimicrobial peptide-loaded scaffolds, metal oxide nanoparticles, bacteriophages-loaded biomaterials and hybrid composites have demonstrated the ability to disrupt biofilms, deliver targeted therapeutics, and create environments favorable for cell proliferation and tissue repair. Recent innovations emphasize “smart” biomaterials that respond to wound-specific stimuli, controlled-release systems for sustained drug delivery, and bioinspired materials that mimic native tissue architecture. The integration of electrospinning, 3D bioprinting, and surface functionalization has further advanced the design of next-generation wound dressings. This comprehensive review explores how biomaterials combat infection in chronic wounds, evaluates their clinical translation, and discusses barriers such as cytotoxicity, scalability, and regulatory challenges. Finally, it outlines future directions for personalized, biomaterial-based wound care that supports antimicrobial stewardship and improved patient outcomes.

Chronic wound infections are a major clinical challenge due to biofilm formation and increasing antimicrobial resistance, which compromise the effectiveness of conventional treatments. This review provides a focused and critical evaluation of biomaterial-based strategies designed to simultaneously control infection and promote tissue regeneration. Four principal antimicrobial platforms are comparatively analyzed: drug-loaded biomaterials, antimicrobial peptide-functionalized systems, metal-based nanomaterials, and bacteriophage-integrated materials. Their mechanisms of action, effectiveness against biofilms, and capacity to modulate the wound microenvironment are systematically examined. A key contribution of this work is the integration of these strategies within a translational framework, highlighting trade-offs between clinical maturity, antimicrobial performance, resistance mitigation, and regulatory complexity. In contrast to conventional reviews that primarily catalogue materials, this manuscript positions biomaterial approaches along a continuum from clinically established to emerging technologies, providing insight into why certain strategies (e.g., antibiotic-loaded dressings) dominate current practice, while others (e.g., phage-based and smart responsive systems) remain high-impact but underdeveloped. Furthermore, recent advances in stimuli-responsive (“smart”) biomaterials, multifunctional composites, and bioinspired platforms are critically evaluated as next-generation tools capable of dynamically responding to infection-specific cues. Key barriers, including cytotoxicity, manufacturing scalability, and regulatory constraints, are discussed to identify priorities for clinical translation. This perspective provides a structured roadmap for the development of effective biomaterial-based interventions in chronic wound care.

Bone infections, particularly those caused by Staphylococcus aureus, pose clinical challenges due to biofilm formation and association with bone loss. To address this, we developed a three-dimensional (3D) printed hydrogel-based drug delivery device composed of a chitosan-starch mesh filled with a minocycline-alginate hydrogel. We hypothesize that this novel 3D-printed device can deliver the drug with dual therapeutic effects - anti-S. aureus activity and osteogenesis. To optimize the mesh formulation composition and printing parameters, we applied a neurofuzzy logic-based data-driven approach. The model identified that higher polysaccharide concentrations and reduced flow speed improved mesh printing quality. The presence of minocycline within the device was confirmed by FTIR-ATR through the identification of characteristic functional group, while DSC analysis provided additional evidence of its crystalline state. The device's structure led to a biphasic drug release profile. Antibiofilm assays showed a 2.7-log reduction in methicillin resistant S. aureus biofilm formation with minocycline-loaded devices, compared to 0.59-log reduction in unloaded devices, indicating effective antibiofilm activity on early biofilm formation. Cytocompatibility was confirmed in human osteoblastic-like cells and the minocycline-devices promoted bone regeneration in an ex vivo organotypic bone defect model.

Oral infections, caused by bacterial, fungal, and viral pathogens, are a significant source of dental morbidity and can lead to systemic complications, especially in immunocompromised individuals. Complex microbial interactions and host immune responses drive common conditions such as dental caries, periodontal disease, oral candidiasis, and herpetic lesions. Conventional antimicrobial therapies face limitations due to resistance and adverse effects, prompting interest in alternative treatments. Cannabidiol (CBD), a non-psychoactive compound derived from Cannabis sativa, has emerged as a promising candidate due to its antimicrobial, anti-inflammatory, and immunomodulatory properties. CBD targets various molecular pathways, including cannabinoid receptors, TRP channels, adenosine receptors, and PPARs, contributing to its multifaceted therapeutic effects. It has demonstrated efficacy against oral pathogens such as Streptococcus mutans, Enterococcus faecalis, and Candida albicans, disrupting biofilms and bacterial membranes. Additionally, CBD modulates inflammatory responses by reducing cytokine production and oxidative stress, particularly relevant in chronic conditions like periodontal disease. Emerging evidence also suggests synergistic effects with conventional antimicrobials and benefits in tissue regeneration. This review highlights the therapeutic potential of CBD in managing oral infections, offering a novel approach to overcoming current treatment limitations and guiding future research into safer and more effective oral health interventions.

Wound management presents a significant clinical challenge due to the rising prevalence of chronic wounds caused by conditions such as venous insufficiency, diabetes, and obesity, alongside acute injuries and surgical wounds. This review provides a comprehensive analysis of key materials used in wound dressings, contextualizing their origin, chemical structure, and intrinsic properties while emphasizing their roles in promoting wound healing. Particular attention is given to materials’ capacity to stimulate regeneration and incorporate substances such as antimicrobial agents and growth factors to enhance functionality. Additionally, this review examines antimicrobial dressings as a critical tool for controlling bioburden and enhancing healing, detailing their mechanisms of action, advantages, and limitations. By addressing strategies for hydrogel application and the effectiveness of both natural and synthetic polymers, this analysis bridges the gap between material science and clinical practice. This review aims to analyze the development of cost-effective, environmentally friendly, and versatile wound dressings that meet diverse clinical needs. This synthesis of material science and antimicrobial strategies offers a foundational resource for advancing wound care solutions.

Hernia is a physiological condition that significantly impacts patients’ quality of life. Surgical treatment for hernias often involves the use of specialized meshes to support the abdominal wall. While this method is highly effective, it frequently leads to complications such as pain, infections, inflammation, adhesions, and even the need for revision surgeries. According to the Food and Drug Administration (FDA), hernia recurrence rates can reach up to 11%, surgical site infections occur in up to 21% of cases, and chronic pain incidence ranges from 0.3% to 68%. These statistics highlight the urgent need to improve mesh technologies to minimize such complications. The design and material composition of meshes are critical in reducing postoperative complications. Moreover, integrating drug-eluting properties into the meshes could address issues like infections and inflammation by enabling localized delivery of antibiotics and anti-inflammatory agents. Mesh design is equally important, with innovative structures like auxetic designs offering enhanced mechanical properties, flexibility, and tissue integration. These advanced designs can distribute stress more evenly, reduce fatigue, and improve performance in areas subjected to high pressures, such as during intense coughing, sneezing, or heavy lifting. Technological advancements, such as 3D printing, enable the precise fabrication of meshes with tailored designs and properties, providing new opportunities for innovation. By addressing these challenges, the development of next-generation mesh implants has the potential to reduce complications, improve patient outcomes, and significantly enhance quality of life for individuals undergoing hernia repair.

Presently, millions worldwide suffer from degenerative and inflammatory bone and joint issues, comprising roughly half of chronic ailments in those over 50, leading to prolonged discomfort and physical limitations. These conditions become more prevalent with age and lifestyle factors, escalating due to the growing elderly populace. Addressing these challenges often entails surgical interventions utilizing implants or bone grafts, though these treatments may entail complications such as pain and tissue death at donor sites for grafts, along with immune rejection. To surmount these challenges, tissue engineering has emerged as a promising avenue for bone injury repair and reconstruction. It involves the use of different biomaterials and the development of three-dimensional porous matrices and scaffolds, alongside osteoprogenitor cells and growth factors to stimulate natural tissue regeneration. This review compiles methodologies that can be used to develop biomaterials that are important in bone tissue replacement and regeneration. Biomaterials for orthopedic implants, several scaffold types and production methods, as well as techniques to assess biomaterials’ suitability for human use—both in laboratory settings and within living organisms—are discussed. Even though researchers have had some success, there is still room for improvements in their processing techniques, especially the ones that make scaffolds mechanically stronger without weakening their biological characteristics. Bone tissue engineering is therefore a promising area due to the rise in bone-related injuries.

The importance of fungal infections, particularly those caused by yeasts, is increasing among the medical community. Candida albicans and Cryptococcus neoformans are amongst the high-priority fungal species identified by the World Health Organization (WHO) and are considered in the critical group, while Candida krusei is included in the medium-priority group. The cyclam salt H4[H2(4-CF3PhCH2)2Cyclam]Cl4 proved to be active against the growth of these three yeasts, and the aim of this work was to verify its interference with their virulence mechanisms, whether shared or unique. H4[H2(4-CF3PhCH2)2Cyclam]Cl4 significantly inhibited biofilm production and catalase activity, being able to interfere with C. albicans dimorphic transition and C. neoformans melanin production. At the minimal inhibitory concentration (MIC) values, H4[H2(4-CF3PhCH2)2Cyclam]Cl4 had no antioxidant effect, as determined by the DPPH method. When using the RAW264.7 macrophage cell line, H4[H2(4-CF3PhCH2)2Cyclam]Cl4 reduced nitric oxide (NO) detection (the Griess reaction), but this effect was associated with a significant toxic effect on the cells.

Antibiotics are drugs that target and destroy bacteria, and they are hailed as one of the most amazing medical breakthroughs of the 20th century. They have completely changed how we treat infections and have saved countless lives. But their usefulness is not limited to just medicine; they have also been used for many years in sectors like farming to prevent infections in animals, especially in less wealthy countries. Antimicrobial resistance (AMR) is the ability of microorganisms such as bacteria, viruses, fungi, and parasites to resist the effects of antimicrobial agents, like antibiotics, antivirals, antifungals, and antiparasitics, that were once effective in treating infections caused by these organisms. AMR presents an intricate challenge that endangers the health of both humans and animals, as well as the global economy, and the security of nations and the world at large. Because resistant bacteria are swiftly appearing and spreading among humans, animals, and the environment worldwide, AMR is acknowledged as a challenge within the framework of One Health. The One Health approach involves cooperation among various fields to attain the best possible health outcomes for humans, animals, and the environment. It acknowledges the interconnectedness of human, animal, and environmental health. AMR is not merely a scientific or medical issue; it is a societal challenge that demands collective action and awareness. In the intricate tapestry of society, every thread contributes to the fabric of AMR, and every individual holds a stake in its resolution.

Biofilm-associated infections present a significant challenge in modern medicine, primarily due to their resilience and resistance to conventional treatments. These infections occur when bacteria form biofilms, protective layers formed by bacterial communities, which are notoriously resistant to traditional antibiotics on surfaces such as medical implants and biological surfaces, making eradication with standard antibiotics difficult. This resilience leads to persistent infections, imposing a substantial economic burden on healthcare systems. The urgency to find alternative treatments is critical as current methods are insufficient and costly. Innovative approaches, such as nanotechnology-based therapies, offer promising alternatives by targeting biofilms more effectively and reducing the need for invasive procedures. Nanocarriers hold significant promise in the fight against biofilm-associated infections. Nanocarriers can penetrate biofilms more effectively than conventional treatments, delivering higher concentrations of antibiotics or other antimicrobial agents precisely where they are needed. This targeted approach not only enhances the efficacy of treatments but also minimizes potential side effects. The development of nanocarrier-based therapies is crucial for overcoming the limitations of current treatments and ultimately improving patient outcomes and reducing the economic burden of biofilm-associated infections on healthcare systems. In this review, nanotechnology-based systems, their characteristics, limitations, and potential benefits are explored to address biofilms-related infections. Additionally, biofilm evaluation models and the tests necessary for the preclinical validation of these nanosystems to facilitate their clinical application are addressed.

It is acknowledged that humans have a diverse and abundant microbial community known as the human microbiome. Nevertheless, our comprehension of the numerous functions these microorganisms have in human health is still in its early stages. Microorganisms belonging to the human microbiome typically coexist with their host, but in certain situations, they can lead to diseases. They are found in several areas of the human body in healthy individuals. The microbiome is highly diverse, and its composition varies depending on the body site. It primarily comprises bacteria that are crucial for upholding a state of well-being and equilibrium. The microbiome's influence on atopic dermatitis development was, therefore, analyzed. The importance of maintaining a balanced and functional commensal microbiota, as well as the use of prebiotics and probiotics in the prevention and treatment of atopic dermatitis were also explored. The skin microbiome's association with atopic dermatitis will allow for a better understanding of pathogenesis and also exploring new therapeutic approaches, making the skin microbiome an increasingly relevant therapeutic target.

This work aims to evaluate the characterization, antibacterial activity, and mesenchymal stem cell (MSC) viability in films obtained by cold plasma polymerization, from the essential oil of Eucalyptus globulus on Ti6Al4V alloy. The film presented low roughness values and a contact angle of 85 & DEG;. The process incorporated a coating with oxygenated functional groups (OH and CO). The effect of ultraviolet radiation, ethylene oxide, autoclave, and air plasma sterilization on polymer degradation was evaluated. Biofilm formation by Staphylococcus aureus was reduced on the film surface with no toxicity to MSCs. These effects can be attributed to functional groups, combined with the surface roughness and contact angle. These results suggest a potential for the application of this coating in biomaterials.

This review provides an overview of various materials used in dentistry and oral and maxillofacial surgeries to replace or repair bone defects. The choice of material depends on factors such as tissue viability, size, shape, and defect volume. While small bone defects can regenerate naturally, extensive defects or loss or pathological fractures require surgical intervention and the use of substitute bones. Autologous bone, taken from the patient’s own body, is the gold standard for bone grafting but has drawbacks such as uncertain prognosis, surgery at the donor site, and limited availability. Other alternatives for medium and small-sized defects include allografts (from human donors), xenografts (from animals), and synthetic materials with osteoconductive properties. Allografts are carefully selected and processed human bone materials, while xenografts are derived from animals and possess similar chemical composition to human bone. Synthetic materials such as ceramics and bioactive glasses are used for small defects but may lack osteoinductivity and moldability. Calcium-phosphate-based ceramics, particularly hydroxyapatite, are extensively studied and commonly used due to their compositional similarity to natural bone. Additional components, such as growth factors, autogenous bone, and therapeutic elements, can be incorporated into synthetic or xenogeneic scaffolds to enhance their osteogenic properties. This review aims to provide a comprehensive analysis of grafting materials in dentistry, discussing their properties, advantages, and disadvantages. It also highlights the challenges of analyzing in vivo and clinical studies to select the most suitable option for specific situations.

Ophthalmology is the branch of medicine that deals with diseases of the eye, the organ responsible for vision, and its attachments. Biomaterials can be made with different types of materials and can replace or improve a function or an organ, specifically the eye in the case of ophthalmic biomaterials. Biomaterials are substances that interact with biological systems for a medical purpose, either as a therapeutic (treat, augment, repair, or replace a tissue function of the body) or a diagnostic agent, and have continued to improve over the years, leading to the creation of new biomaterials. With the arrival of new generations, biomaterials have succeeded in reducing complications and toxicity and improving biocompatibilities associated with older generations. With the aging population, eye problems are becoming more prevalent, and biomaterials have helped in recent years to improve or restore vision, improving the quality of life of many patients. This review focuses on the most clinically used ophthalmic biomaterials, including contact lenses, intraocular lenses, artificial tears, inlays and vitreous replacements. Tissue engineering is presented as a new tool that is able to be treat several ophthalmologic disorders.

New strategies for the treatment of polymicrobial bone infections are required. In this study, the co-delivery of two antimicrobials by poly(D,L-lactic acid) (PDLLA) scaffolds was investigated in a polymicrobial biofilm model. PDLLA scaffolds were prepared by solvent casting/particulate leaching methodology, incorporating minocycline and voriconazole as clinically relevant antimicrobial agents. The scaffolds presented a sponge-like appearance, suitable to support cell proliferation and drug release. Single- and dual-species biofilm models of Staphylococcus aureus and Candida albicans were developed and characterized. S. aureus presented a higher ability to form single-species biofilms, compared to C. albicans. Minocycline and voriconazole-loaded PDLLA scaffolds showed activity against S. aureus and C. albicans single- and dual-biofilms. Ultimately, the cytocompatibility/functional activity of PDLLA scaffolds observed in human MG-63 osteosarcoma cells unveil their potential as a next-generation co-delivery system for antimicrobial therapy in bone infections.

One of the most serious complications following the implantation of orthopedic biomaterials is the development of infection. Orthopedic implant-related infections do not only entail clinical problems and patient suffering, but also cause a burden on healthcare care systems. Additionally, the ageing of the world population, in particular in developed countries, has led to an increase in the population above 60 years. This is a significantly vulnerable population segment insofar as biomaterials use is concerned. Implanted materials are highly susceptible to bacterial and fungal colonization and the consequent infection. These microorganisms are often opportunistic, taking advantage of the weakening of the body defenses at the implant surface–tissue interface to attach to tissues or implant surfaces, instigating biofilm formation and subsequent development of infection. The establishment of biofilm leads to tissue destruction, systemic dissemination of the pathogen, and dysfunction of the implant/bone joint, leading to implant failure. Moreover, the contaminated implant can be a reservoir for infection of the surrounding tissue where microorganisms are protected. Therefore, the biofilm increases the pathogenesis of infection since that structure offers protection against host defenses and antimicrobial therapies. Additionally, the rapid emergence of bacterial strains resistant to antibiotics prompted the development of new alternative approaches to prevent and control implant-related infections. Several concepts and approaches have been developed to obtain biomaterials endowed with anti-infective properties. In this review, several anti-infective strategies based on biomaterial engineering are described and discussed in terms of design and fabrication, mechanisms of action, benefits, and drawbacks for preventing and treating orthopaedic biomaterials-related infections.

The world population is ageing, in particular in the developed world, with a significant increase in the percentage of people above 60 years old. They represent a segment of the population that is more vulnerable to adverse environmental conditions. Among them, indoor air quality is one of the most relevant, as elders spend comparatively more time indoors than younger generations. Furthermore, the recent COVID-19 pandemic contributed immensely to raising awareness of the importance of breathing air quality for human health and of the fact that indoor air is a vector for airborne infections and poisoning. Hence, this work reviews the state of the art regarding indoor air quality in elderly centers, considering the type of pollutants involved, their emission sources, and their health effects. Moreover, the influence of ventilation on air quality is also addressed. Notwithstanding the potential health problems with the corresponding costs and morbidity effects, only a few studies have considered explicitly indoor air quality and its impacts on elderly health. More studies are, therefore, necessary to objectively identify what are the impacts on the health of elderly people due to the quality of indoor air and how it can be improved, either by reducing the pollutants emission sources or by more adequate ventilation and thermal comfort strategies.

de Poster na conferencia internacional 31st European Congress of Clinical Microbiology & Infectious Diseases (ECCMID)