CTCostas Tsiamis

Costas Tsiamis

*This is an algorithmically generated author record based on publicly available information.

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Costas Tsiamis has a total of 17 co-authors. Here are the top co-authors by number of shared publications:


Latest Publications

  • Open Access

    Tuberculosis Control Protocols in the European Region: A Brief Overview

    by Aimilios Pliatsikas, Costas Tsiamis, Joseph Papaparaskevas, Georgia Vrioni, Athanasios Tsakris

    Tuberculosis (TB) continues to be a significant public health challenge in Europe, despite a sustained decline in disease incidence over recent decades. This narrative review briefly traces the historical development of TB diagnosis and focuses on the evolution of TB control protocols from the early twentieth century to the present across Europe, through a longitudinal comparative analysis of its geographical regions. A literature search was conducted using publications, guidelines, and surveillance reports from the World Health Organization (WHO), the European Centre for Disease Prevention and Control (ECDC), and national public health authorities. The analysis follows a geographical framework encompassing Eastern, Western, Northern, and Southern Europe, reflecting historical, socioeconomic, and healthcare system differences. This study presents the transition from traditional diagnostic approaches based on clinical assessment, chest radiography, and smear microscopy to modern molecular and immunological techniques, including Xpert MTB/RIF assays and interferon-gamma release assays (IGRAs). Similarly, treatment strategies have evolved from sanatorium-based supportive care to standardized, evidence-based short-course regimens employing first- and second-line anti-TB drugs. However, marked regional differences remain in the implementation of contemporary protocols. Western and Northern European countries have largely adopted advanced diagnostic technologies and comprehensive surveillance systems and are approaching TB elimination targets. In contrast, Eastern Europe continues to bear a disproportionate disease burden, driven by multidrug-resistant TB, HIV co-infection, and socioeconomic disparities. TB control protocols in Southern Europe are progressively converging with those of Western Europe through the adoption of modern diagnostic approaches, standardized treatment regimens, and WHO-endorsed guidelines. The findings of this study underscore the need for greater harmonization of TB control protocols across Europe through an initiative coordinated by the ECDC/WHO. Accelerating progress toward TB elimination in the European Region will depend on expanding access to modern diagnostic technologies, implementing targeted interventions in high-burden settings, and strengthening cross-border collaboration through coordinated public health policies.

  • Open Access

    Attitudinal Profiles Toward Medical Mediation Among Healthcare Professionals: Evidence from a Scenario-Based Survey and Latent Class Analysis

    by Olympia Lioupi, Polychronis Kostoulas, Konstadina Griva, Charalambos Billinis, Costas Tsiamis

    Medical mediation (MM) is a collaborative tool for resolving ethically complex disputes in healthcare. Background/Objectives: Though widely recognized in international clinical ethics, it has only been recently introduced in Greece. The objective of this study was (i) to quantify agreement with MM across three clinical scenarios, (ii) to estimate the proportion of professionals that support mediation and institutional training, and (iii) to identify distinct attitudinal profiles using latent class analysis (LCA). Methods: A structured, cross-sectional online questionnaire was completed by 431 healthcare professionals across Greece. The survey included three clinical vignettes (on (1) end-of-life care, (2) religious refusal of treatment, and (3) medical error disclosure), Likert-scale items on attitudes toward mediation, and demographic information. LCA was used to identify patterns of response across the scenarios and differentiate between strongly supportive, moderately supportive, and cautiously positive professional profiles. Results: Participants expressed strong support for mediation across all scenarios (median scores ≥ 9), with the highest support for medical error disclosure (mean 8.67 ± 2.10 and a median of 10). Most participants (97.2%, n = 419) considered mediation at least sometimes effective, and 80.7% (n = 348) endorsed institutional training. However, only 3.0% (n = 13) reported formal training and 1.9% (n = 8) reported being very familiar with MM. LCA revealed three distinct respondent profiles: strongly supportive (73.3%, n = 316), moderately supportive (14.6%, n = 63), and cautiously positive (12.1%, n = 52). Significant trends were observed across profiles for the perceived effectiveness of mediation and support for institutional training (p < 0.01). However, formal training and familiarity with mediation among the participants were low (<5%). Conclusions: Despite limited training and formal implementation, Greek healthcare professionals show high support for MM. The demand and need for structured mediation training and integration into the Greek healthcare system is strong. The identification of distinct attitudinal profiles provides insight into potential variation in organizational readiness for implementing structured mediation training

  • Open Access

    Harnessing Medical Bioethics Mediation to Advance One Health Governance

    by Olympia Lioupi, Polychronis Kostoulas, Gustavo Monti, Konstadina Griva, Charalambos Billinis, Costas Tsiamis

    One Health envisions integrated governance across human, animal, and environmental systems to prevent and respond to complex health threats. Despite its global endorsement, One Health implementation often falters due to institutional fragmentation, power asymmetries, and ethical tensions that erode trust and cooperation. This paper proposes the integration of medical-bioethics mediation within One Health governance as a structured, relational mechanism to manage conflict, foster ethical deliberation, and strengthen trust between sectors and communities. We develop a conceptual framework to apply the mediation principles of neutrality, confidentiality, respect, and shared problem-solving beyond clinical ethics toward multisectoral One Health contexts. The framework is illustrated through domain-specific examples from zoonotic disease control, antimicrobial resistance, and environmental health. Medical bioethics mediation can advance conflict transformation, ethical reflection, participatory decision-making, and policy alignment, thereby supporting transparent negotiation of values and institutionalized dialogue of different One Health actors. Future research should pilot mediation-based governance models and assess their effects on intersectoral trust, collaborative capacity, and integrated health outcomes.


  • Open Access

    Applications of Medical Mediation: A Systematic Review of Its Role in Healthcare Dispute Resolution and Bioethical Decision-Making

    by Olympia Lioupi, Polychronis Kostoulas, Konstadina Griva, Charalambos Billinis, Costas Tsiamis

    Background: Medical mediation offers a patient-centered, collaborative alternative to traditional resolution methods for healthcare conflicts that is gaining international traction in an increasingly complex environment of advancing technology and diverse patient populations. This systematic review aims to synthesize the literature on medical mediation and analyze its clinical applications, conflict typologies, involved actors, mediation methodologies, legal frameworks, and theoretical underpinnings. Methods: A systematic search was conducted in PubMed and Scopus for English-language articles published between 1984 and 2025. Results: Of 656 initial records, 152 studies met the inclusion criteria and were categorized across six domains: clinical context, actors involved, conflict type, mediation framework, legal/policy structure, and theoretical foundations. Most studies originated from high-income countries, particularly the U.S. and U.K., with notable expansion after 2010. Medical mediation was most frequently applied in bedside care, end-of-life decision-making, and managed-care disputes. While ethics consultants were the primary mediators, increasing involvement of trained clinicians and institutional actors was also observed. Most studies emphasized generic bioethical mediation frameworks, with some focused on formalized models and training. Legal frameworks varied, and an increasing number of countries have been adopting institutional or national programs to support mediation. Conclusions: Medical mediation is an efficient tool for resolving complex clinical conflicts, enhancing communication, and preserving therapeutic relationships. Its institutionalization, through law and training, is key to the promotion of justice, transparency, and ethical integrity in modern healthcare systems.


  • Open Access

    Harnessing Medical-Bioethics Mediation to Advance One Health Governance

    by Olympia Lioupi, Polychronis Kostoulas, Gustavo Monti, Konstadina Griva, Charalambos Billinis, Costas Tsiamis

    One Health (OH) envisions integrated governance across human, animal, and envi-ronmental systems to prevent and respond to complex health threats. Despite its global endorsement, OH implementation often falters due to institutional fragmentation, power asymmetries, and ethical tensions that erode trust and cooperation. This paper proposes the integration of medical-bioethics mediation within OH governance as a structured, relational mechanism to manage conflict, foster ethical deliberation, and strengthen trust among sectors and communities. We develop a conceptual framework to apply the me-diation principles of neutrality, confidentiality, respect, and shared problem-solving- beyond clinical ethics toward multisectoral OH contexts. The framework is illustrated through domain-specific examples from zoonotic disease control, antimicrobial resistance, and environmental health. Medical-bioethics mediation can advance conflict transfor-mation, ethical reflection, participatory decision-making, and policy alignment, thereby supporting transparent negotiation of values and institutionalized dialogue of different OH actors. Future research should pilot mediation-based governance models and assess their effects on intersectoral trust, collaborative capacity, and integrated health outcomes.


  • Open Access

    Changing Epidemiology of Tinea Capitis in Athens, Greece: The Impact of Immigration and Review of Literature

    by Stefanos Charpantidis, Maria Siopi, Georgios Pappas, Kalliopi Theodoridou, Constantinos Tsiamis, George Samonis, Stella-Eugenia Chryssou, Stamatios Gregoriou, Dimitrios Rigopoulos, Athanasios Tsakris, et al.

    Mass population movements have altered the epidemiology of tinea capitis (TC) in countries receiving refugees. Periodic monitoring of the local pathogen profiles may serve as a basis for both the selection of appropriate empirical antifungal therapy and the implementation of preventive actions. Therefore, we investigated the impact of an unprecedented immigration wave occurring in Greece since 2015 on the epidemiological trends of TC. All microbiologically confirmed TC cases diagnosed during the period 2012–2019 in a referral academic hospital for dermatological disorders in Athens, Greece, were retrospectively reviewed. A total of 583 patients were recorded, where 348 (60%) were male, 547 (94%) were children and 160 (27%) were immigrants from Balkan, Middle Eastern, Asian as well as African countries. The overall annual incidence of TC was 0.49, with a significant increase over the years (p = 0.007). M. canis was the predominant causative agent (74%), followed by T. violaceum (12%), T. tonsurans (7%) and other rare dermatophyte species (7%). M. canis prevalence decreased from 2014 to 2019 (84% to 67%, p = 0.021) in parallel with a three-fold increase in T. violaceum plus T. tonsurans rates (10% to 32%, p = 0.002). An increasing incidence of TC with a shift towards anthropophilic Trichophyton spp. in Greece could be linked to the immigration flows from different socioeconomic backgrounds.