Ilias Chantziaras

Ilias Chantziaras
Ghent University | UGhent · Department of Obstetrics, Reproduction and Herd Health

DVM, PgCert, PhD, Dip. ECVPH

About

41
Publications
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710
Citations
Additional affiliations
September 2012 - present
Ghent University
Position
  • PostDoc Position

Publications

Publications (41)
Article
Full-text available
Background Dam-to-piglet transmission plays an important role in the epidemiology of enzootic pneumonia on farms. Although Mycoplasma hyopneumoniae ( M. hyopneumoniae ) infections in breeding animals are often subclinical, their control could have a positive effect on M. hyopneumoniae infection levels in fattening pigs. This study investigated the...
Article
Full-text available
Major efforts have been made by veterinary professionals to reduce the need for antibiotic use in animals. An online survey launched by the Federation of Veterinarians of Europe (FVE) aimed to gather responses from practicing veterinarians with field experience in metaphylactic livestock group treatment. Only 17% of all veterinarians (n = 183/1087,...
Article
Full-text available
Partial depopulation is the removal and slaughter of part of a flock prior to the final slaughter age, and this practice allows broiler producers to optimize stocking density in broiler houses. However, this practice constitutes a serious break in farm biosecurity that can lead to the introduction of various pathogens in the flock, including Campyl...
Article
Full-text available
Background Piglet perinatal and pre-weaning mortality is a welfare problem causing economic losses in pig production. In this study, the effects of housing and management interventions on the economic result of sow enterprises representing six European countries (Belgium, Denmark, Finland, Germany, The Netherlands and Spain) were tested. Interventi...
Article
Background: High-power laser therapy gained popularity recently as a regenerative treatment for tendinitis and desmitis in the horse. However, studies evaluating effects of laser therapy on tissue repair at histological level in large mammals are lacking. Objectives: To evaluate effects of high-power laser therapy on suspensory desmitis healing,...
Article
Full-text available
Background Porcine ear necrosis (PEN) in pigs is characterized by a blue to black discoloration of the tip or margin of the ear followed by necrosis. The present study investigated the prevalence of PEN in a Belgian pig farm with PEN problems in nursery pigs, the effect of a mycotoxin detoxifier added to the feed on PEN prevalence, and the impact o...
Article
Full-text available
Regular evaluation of integrated surveillance for antimicrobial use (AMU) and resistance (AMR) in animals, humans, and the environment is needed to ensure system effectiveness, but the question is how. In this study, six different evaluation tools were assessed after being applied to AMU and AMR surveillance in eight countries: (1) ATLASS: the Asse...
Chapter
This chapter focuses on the epidemiology, transmission routes, and biosecurity measures of bacterial diseases in pigs and poultry raised in intensive production systems. Bacterial pathogens are highly prevalent in these systems and cause major animal health, welfare, and production problems. There are numerous transmission routes by which bacterial...
Article
Full-text available
Postpartum dysgalactia syndrome (PPDS) is a major economic problem in modern sow farms. General treatment of PPDS consists of the use of oxytocin to promote milk ejection and non-steroidal anti-inflammatory drugs (NSAIDs) to alleviate inflammatory processes. So far, studies investigated the use of a single administration of NSAIDs after parturition...
Article
Full-text available
Background: Brachyspira infections are causing major losses to the pig industry and lead to high antimicrobial use. Treatment of Brachyspira (B.) hyodysenteriae infections may be problematic due to the high level of antimicrobial resistance. The present study implemented and evaluated farm-specific eradication programmes for B. hyodysenteriae in 1...
Article
A multifactorial approach using environmental, performance, health and welfare parameters was used to investigate the numerous associations of ventilation throughout three consecutive fattening batches (08/2015 to 12/2016) in a farrow-to-finish commercial pig farm in Belgium. Two fattening pig units were used, unit A (1256 pigs) with mechanical ven...
Article
Full-text available
Background: Conventional broilers are currently one of the most efficient protein converters. Although decades of progress in genetic selection and feed formulation have lead to high standards of efficient broiler production, still a lot of variability is found between farms and between successive flocks. The aim of this study was to investigate r...
Article
Full-text available
Feed conversion ratio ( FCR ) in grow-finishing pigs is one of the most important determinants of pig farm profitability and production efficiency. In its simplest form, FCR represents the amount of feed used per unit weight gain of the pig. Yet, this approach entails various limitations hampering its practical applicability such as availability of...
Article
Introduction of infectious agents (e.g. African swine fever) in a farm could have severe implications beyond the farm level. Among the solutions required to minimize the risk of disease introduction and spread, the strengthening of biosecurity is a priority. Yet, although the pig fattening (finishing) herds comprise 41.2% of the pig herds on a Euro...
Article
Full-text available
In order to reduce antimicrobial use in pig production, the consequences of insufficient biosecurity and welfare problems need to be known. This study aimed to investigate associations between the number of antimicrobial treatments per fattening pig, and biosecurity, indicators for animal welfare as well as the prevalence of lesions at slaughter. T...
Article
Despite the importance of swine intestinal health, there are no easy‐to‐use and cost‐efficient methods to evaluate it under field conditions for sows. To provide some indication about intestinal health, pH of faeces could be used but reference values for the currently high‐performing commercial sow breeds are missing. In response, faecal pH of heal...
Article
Full-text available
Fear and environmental stressors may negatively affect the welfare of farm animals such as pigs. The present study investigated the effects of music and positive handling on reproductive performance of sows ( n = 1014; parity 1 to 8) from a commercial pig farm practicing a batch farrowing system. Every 2 weeks, 56 sows were moved from the gestation...
Preprint
Background Conventional broilers are currently one of the most efficient protein converters. Although decades of progress in genetic selection and feed formulation have lead to high standards of efficient broiler production, still a lot of variability is found between farms and between successive flocks. The aim of this study was to investigate ris...
Article
Door de toenemende druk op de economische marges in de varkenshouderij neemt het belang van efficiënter produceren toe. De grootste kost bij het afmesten van vleesvarkens is het voeder, met een gemiddeld aandeel van ongeveer 75% in de totale afmestkosten (Departement Landbouw en Visserij). De voederkosten hangen af van de voederprijzen, maar ook va...
Chapter
Full-text available
This chapter provides a conceptual framework describing the main ecological components of the global ecosystem, which need to be considered when using a One Health approach, including incorporating examples of metrics which both reflect the connectedness of different environments and quantify the complex interactions between humans, domesticated an...
Chapter
Full-text available
Challenges calling for integrated approaches to health, such as the One Health (OH) approach, typically arise from the intertwined spheres of humans and animals, and the ecosystems constituting their environment. Initiatives addressing such wicked problems commonly consist of complex structures and dynamics. The Network for Evaluation of One Health...
Article
Production diseases are often of multi-factorial origin in which environment (housing, nutrition and management) health and reproductive challenges show complex interactions. The aim of this study was to identify specific environment-related factors and to discuss their associations with health, welfare and reproductive performance in sows and pigl...
Article
The effect of a competitive exclusion product (Aviguard®) on the selection of fluoroquinolone resistance in poultry was assessed in vivo in the absence or presence of fluoroquinolone treatment. Two experiments using a controlled seeder-sentinel animal model (2seeders:4sentinels per group) with one-day-old chicks were used. For both experiments,as s...
Article
Full-text available
The cross-contamination of non-medicated feed with residues of antimicrobials (AM) causes a public and animal health concern associated with the potential for selection and dissemination of resistance. To analyze the associated risks, a probabilistic model was built using @Risk® (Palisade Corporation®) to show the potential extent of the effect of...
Article
Full-text available
Challenges calling for integrated approaches to health, such as the One Health (OH) approach, typically arise from the intertwined spheres of humans, animals, and ecosystems constituting their environment. Initiatives addressing such wicked problems commonly consist of complex structures and dynamics. As a result of the EU COST Action (TD 1404) “Ne...
Article
Om een beter inzicht te krijgen in het voorkomen van antimicrobiële resistentie tegen ‘de meest kritisch belangrijke antibiotica met hoogste prioriteit voor humane geneeskunde’ bij kleine huisdieren werd een descriptieve retrospectieve analyse van 811 antibiogrammen bij hond en kat uitgevoerd. De antibiogrammen werden door een diergeneeskundig, dia...
Article
Full-text available
Having gained momentum in the last decade, the One Health initiative promotes a holistic approach to address complex global health issues. Before recommending its adoption to stakeholders, however, it is paramount to first compile quantitative evidence of the benefit of such an approach. The aim of this scoping review was to identify and summarize...
Article
Full-text available
A descriptive retrospective analysis of 811 antibiograms in dogs and cats was carried out in order to get a better insight into the prevalence of antimicrobial resistance against 'critically important antimicrobials with highest priority for human medicine' in dogs and cats. A veterinary diagnostic laboratory performed antimicrobial susceptibility...
Article
Full-text available
Having gained momentum in the last decade, the One Health initiative promotes a holistic approach to address complex global health issues. Before recommending its adoption to stakeholders, however, it is paramount to first compile quantitative evidence of the benefit of such an approach. The aim of this scoping review was to identify and summarize...
Chapter
Full-text available
Challenges calling for integrated approaches to health, such as the One Health (OH) approach, typically arise from the intertwined spheres of humans and animals, and the ecosystems constituting their environment. Initiatives addressing such wicked problems commonly consist of complex structures and dynamics. The Network for Evaluation of One Health...
Article
Link to the abstract: https://academic.oup.com/jac/article-abstract/72/7/1991/3737535/Studying-the-effect-of-administration-route-and
Article
Objectives: Factors potentially contributing to fluoroquinolone resistance selection in commensal Escherichia coli strains in poultry were studied through a series of in vivo experiments. The effect of the initial prevalence of enrofloxacin resistance in the E. coli gut microbiota, effect of the bacterial fitness of the enrofloxacin-resistant stra...
Article
Antimicrobial resistance is recognized as one of the most important global health challenges. Broilers are an important reservoir of antimicrobial resistant bacteria in general and, more particularly, ESBL/AmpC-producing Enterobacteriaceae. Since contamination of 1-day-old chicks is a potential risk factor for the introduction of antimicrobial resi...
Article
Full-text available
In this article, detailed studies on antimicrobial resistance to commensal E. coli (in pigs, meatproducing bovines, broiler chickens and veal calves) and pathogenic E. coli (in pigs and bovines) in Belgium are presented for 2011. Broiler chicken and veal calf isolates of commensal E. coli demonstrated higher antimicrobial resistance prevalence than...
Article
Full-text available
To evaluate correlations between antimicrobial use and the prevalence of resistance in commensal Escherichia coli isolates from pigs, poultry and cattle, using data from publicly available national or international reports from seven European countries. The link between the quantities of different classes of antimicrobials administered to food-prod...

Network

Cited By

Projects

Projects (3)
Project
In this project we are studying all aspects of biosecurity in hygiëne in animal production with the aim to prevent infectious diseases and reduce the need for antimicrobials.
Project
Design and use of in vivo experiments to assess potential factors contributing to the selection of antimicrobial resistance.
Project
From the “Network for the Evaluation of One Heath” to the “Network for Ecohealth and One Health” (https://www.ecohealthinternational.org/regional-chapters/europe/) Between 2014 and 2018 the COST funded Action TD1404 (https://www.cost.eu/actions/TD1404/ ) “Network for Evaluation of One Health - NEOH" (Action chair: Barbara Haesler; Action grant holder: Royal Veterinary College, UK - https://www.rvc.ac.uk/) brought together more than 250 researchers, practitioners, decision-makers and other stakeholders with an interest in One Health and evaluation. They shared a vision to develop and use methods and frameworks for improved decision making on complex health issues (http://neoh.onehealthglobal.net/). The NEOH COST Action was successful in many aspects, one being the development of new and strong working relationships between many of the people involved in One Health in Europe. To grow these relationships, we have established a new organisation to continue NEOH’s momentum and to invite interested people to join and contribute to a respectful, inclusive dialogue on One Health and Ecohealth. Over the last years, we have observed an increasing convergence of Ecohealth and One Health: with shared values and approaches of the two concepts, especially in the areas of zoonoses, disease emergence, pandemic threats and ecosystem health. Therefore, NEOH has joined Ecohealth International and is now its European Chapter with the new name “Network for Ecohealth and One Health” (https://www.ecohealthinternational.org/regional-chapters/europe/). The purpose and goals of Ecohealth International and the ecosystem approach to health closely aligns with ours. We aim to enhance existing and form new working relationships on a global scale, and create one united organisation for One Health and Ecohealth in Europe. NEOH is currently lead by Thomas Jaenisch (University of Heidelberg) and has five working groups: - Promoting Transdisciplinarity in Health Sciences (lead by Celine Faverjon and Luís Pedro Gomes do Carmo, University of Bern, Switzerland); - NEOH Communication and Collaboration (lead by Zoran Katrinka, University of Belgrade, Serbia) - NEOH Learning Organization (lead by Simon Rodrigo Rüegg, University of Zurich, Switzerland) - Incorporating a Gender Dimension into One Health and Ecohealth – Gender at the Nexus of Nature and Health (lead by Julie Garnier, Odyssey Conservation Trust, France) - Theoretical Dimension of One Health and Ecohealth (lead by Thomas Jaenisch, University of Heidelberg, Germany); How to join NEOH: You must first register as a member of Ecohealth International at: https://www.ecohealthinternational.org. Click on the membership tab, and fill in the form for individual membership. Please contact the European Chapter of Ecohealth International to register your interest at: https://www.ecohealthinternational.org/regional-chapters/europe. Values and achievements: NEOH recognises that complex global health challenges like food security, sustainability and health for people, animals and the environment require a participatory and transdisciplinary process based on systems thinking. Since its inception in November 2014, NEOH has: • developed a new evaluation approach; • published this approach in multiple journal publications and a handbook for the evaluation of One Health and other integrated approaches to health; • validated the approach by applying it to a suite of international case studies; • assessed the characteristics of existing One Health initiatives in a meta-study; • worked on stakeholder engagement to promote informed decision-making and resource allocation in One Health; and • offered training, learning and capacity building for evaluation of integrated approaches to health. All NEOH outputs are open access. • Handbook: Integrated approaches to health – A handbook for the evaluation of One Health, https://www.wageningenacademic.com/neoh; • Research topic Frontiers journal Concepts and experiences in framing, integration and evaluation of One Health and EcoHealth, https://www.frontiersin.org/research-topics/5479; • Reports, presentations, training resources: http://neoh.onehealthglobal.net. Innovation: NEOH has produced a novel methodology to evaluate One Health in an iterative way that includes characterisation of One Health in a participatory process and development of an evaluation framework based on systems theory. The NEOH consortium demonstrated that One Health is clearly aligned with the UN Sustainable Development Goals. We were the first to provide protocols that can be used to assess the strength of One Health (termed One Healthness) in interdisciplinary initiatives and compare it to One Health outcomes. This information was then used in statistical analyses to produce an objective typology of One Health initiatives that allows their classification into a specific type characterised in terms of context, health issue addressed, objective, actions implemented, and impact, among others. “The NEOH handbook provides a seminal interdisciplinary take on One Health, which allows practitioners, evaluators and decision makers from all disciplines to discover new perspectives on health and think about it in a systemic way”. Approach: We claim that One Health should consider the three pillars of sustainability, namely society, environment and economy, and use methods and data from multiple disciplines to promote effective collaboration, learning and knowledge integration. NEOH DECLARATION ON ONE HEALTH AND ECOHEALTH Foster an informal, safe, sandbox space Welcome free-wheeling, out-of-the box, fresh thinking. Be a safe space to explore and experiment, without fear of failure. Enable new talents to emerge in previously unfamiliar places. Allow the network to capitalize on the adaptive expertise of the members. Be a space where a ‘bud’ of an idea can be built, tested and developed without boundaries (design thinking). Be a place where opinions are encouraged but where a change of mind is also welcome. Be inclusive, representative, collaborative Harness synergies across a diverse network by enabling conversations. Foster respect and equity for every contribution regardless of the background of the member in both bottom-up and top-down interactions. Engage all parts of the system of EH & OH to catalyse progress. • Widen participation and diversity to improve the success and sustainability of outcomes and decision-making. • Diversity may be promoted by geographical (low, middle- and high-income countries globally), disciplinary, sectoral, cultural, gender, junior/senior inclusiveness. Ensure easy and accessible participation Accessible not only for experts, but also beginners and generalists. Encourage equal involvement by building confidence, knowledge and skills to enable contribution from all. Be inspiring and speak in language free of jargon; put value on communicating the ‘big picture’. Help ‘tame’ complex or wicked problems, to help everyone understand and contribute. Make involvement easy and efficient to prevent work overload and avoid duplication of efforts. Provide advice and support to help members bridge the knowledge policy- action gap. Encourage creative and dynamic approaches Offer novel and innovative resources or participation opportunities suitable for everyone. Utilise the collective knowledge of the membership – hive mind. Allow creativity in all areas from problem definition to context description, study design and implementation, investigation & promotion of solutions, and communication. Allow the network to be member lead, responding to needs as they arise and make it self-sustaining. Facilitate self-evaluation to maximise usefulness of outputs. Use novel tools and functions such as: TED talk style video introductions, podcasts, guest curating existing social media accounts; skills and expertise map; digital coffee breaks with other members. Empower, support and unite members Unite members under a set of overarching principles, but ensure freedom to apply in local contexts. Overcome professional territorialism. Encourage everybody to create one united movement and language around EH/OH and other integrated approaches to health. A problem shared is a problem halved: create an interdisciplinary advice and support network. Offer connections for mentoring and conference networking, spread the word through ambassadors and members and harness the energy and enthusiasm of student bodies. Connect to the best of existing resources with reviewed links; without boundaries from disciplinary siloes, just insight. “We hope to inspire you to an open-minded reflection on health and evaluation of integrated approaches to health and that you will feel encouraged to apply the concepts and tools in your field of work and contribute to the further improvement and application of the protocols developed.”