Newcastle University

Research

The overall theme of my research is the consequences of animal management on their perfomance, ability to cope with pathogens and environmental impact. 

Specific research questions include:

1. Prediction of animal responses to their management, including feeding and exposure to pathogens

2. Opportunities to improve nutient utilisation efficiency in livestock, through genetic selection and management

3. Competition for limiting resources between productive and functional traits in animals

4.  The occurence and significance of pathogen induced anorexia.

I am addressing these questions across animals, both livestock and laboratory. 

For my current research projects please see under ' Research'.  

Esteem Indicators

- Fellow of the Hellenic Agricultural Academy (2010)

- Fellow of the Royal College of Veterinary Surgeons (2009)

- Visiting Professor, Institute of Integrative Biology, University of Leeds (2008)

- Adjunct Professor, Animal and Poultry Science Department, University of Guelph, Canada (2008)

- Honorary Fellow of the Centre for Nutritional Modelling, University of Guelph, Canada (2006) 

- Visiting Professor, Animal and Poultry Science Department, University of Guelph, Canada (2003-08)

- Sir John Hammond Award of the British Society of Animal Science (2002)

- The Nutrition society Silver Medal for Excellence in Nutritional Sciences (1996)

Editorial Board Memberships

Animal Science Review (since 2002)

Journal of Animal Science (since 2012)

Poultry Science (since 2012)

Bulletin of the Hellenic Veterinary Medical Society (since 2012) 

Projects

• Assessing the environmental consequences of husbandry changes in UK poultry systems through a Life Cycle Analysis (PoultryLCA)
  Project Leader(s): Professor Ilias Kyriazakis
• Improving the efficiency and environmental impact of UK turkey meat production systems
  Project Leader(s): Professor Ilias Kyriazakis (Newcastle University) and Mr Jeremy Hall (Bernard Matthews)

Undergraduate Teaching 

ACE2031 Animal Parasitology (ML)

ACE2034 Introduction to Immunology (ML) 

ACE3046 Animal Science Issues
 

• Mackenzie SG, Leinonen I, Williams AG, Hazzledine M, Kyriazakis I. Accounting for environmental impact when formulating UK standard broiler diets. In: BSAS/WPSA Annual Conference. 2013, Nottingham, UK.
• Kyriazakis I, Szyszka O, Stockdale EA, Johnson A, Wilson S, Penlington N, Edwards SA. Can we reduce our current levels of Phosphorous in pig diets without affecting their performance and health?. The Pig Journal 2013, 68, 97-101.
• Leinonen I, Williams AG, Waller AH, Kyriazakis I. Comparing the environmental impacts of alternative protein crops in poultry diets: The consequences of uncertainty. Agricultural Systems 2013, (epub ahead of print).
• Szyszka O, Tolkamp BJ, Edwards SA, Kyriazakis I. Do the changes in the behaviours of cattle during parasitism with Ostertagia ostertagi have a potential diagnostic value?. Veterinary Parasitology 2013, 193(1-3), 214-222.
• Leinonen I, Williams AG, Kyriazakis I. Do welfare-enhancing changes in poultry systems affect their environmental impact?. In: BSAS/WPSA Annual Conference. 2013, Nottingham, UK.
• Smith LA, Houdijk JGM, Homer D, Kyriazakis I. Effects of dietary inclusion of pea and faba bean as a replacement for soybean meal on grower and finisher pig performance and carcass quality. Journal of Animal Science 2013, 91(8), 3733-3741.
• Symeou V, Leinonen I, Kyriazakis I. Evaluating a model that predicts phosphorus digestion, retention and excretion in growing and finishing pigs. In: BSAS Annual Conference. 2013, Nottingham, UK.
• Sakkas P, Jones LA, Houdijk JG, Athanasiadou S, Knox DP, Kyriazakis I. Leucine and methionine deficiency impairs immunity to gastrointestinal parasites during lactation. British Journal of Nutrition 2013, 109(2), 273-282.
• Laurenson YC, Bishop SC, Forbes AB, Kyriazakis I. Modelling the short- and long-term impacts of drenching frequency and targeted selective treatment on the performance of grazing lambs and the emergence of anthelmintic resistance. Parasitology 2013, 140(6), 780-791.
• Szyszka O, Kyriazakis I. What is the relationship between level of infection and 'sickness behaviour' in cattle?. Applied Animal Behaviour Science 2013, 147(1-2), 1-10.
• Spahat N, Guy J, Kyriazakis I, Garrod G, Edwards SA. Environmental impact of different broiler production systems in Malaysia and consumer willingness to pay for reduced impact. In: 8th International Conference on LCA in the Agri-Food Sector. 2012, Saint Malo, France.
• Jones LA, Sakkas P, Houydijk JGM, Knox DP, Kyriazakis I. Amelioration of the periparturient relaxation of immunity to parasites through a reduction in mammalian reproductive effort. International Journal for Parasitology 2012, 42(13-14), 1127-1134.
• Kyriazakis I, Williams AG, Waller A, Leinonen I. Evaluating possibilities to reduce the Global Warming Potential of poultry products through the inclusion of European protein sources in broiler and layer diets. In: BSAS/WPSA Annual Conference. 2012, Nottingham, UK.
• Laurenson YCSM, Kyriazakis I, Forbes AB, Bishop SC. Exploration of the epidemiological consequences of resistance to gastro-intestinal parasitism and grazing management of sheep through a mathematical model. Veterinary Parasitology 2012, 189(2-4), 238-249.
• Laurenson YCSM, Kyriazakis I, Bishhop SC. In silico exploration of the impact of pasture larvae contamination and anthelmintic treatment on genetic parameter estimates for parasite resistance in grazing sheep. Journal of Animal Science 2012, 90(7), 2167-2180.
• Houdijk JGM, Kyriazakis I, Kidane A, Athanasiadou S. Manipulating small ruminant parasite epidemiology through the combination of nutritional strategies. Veterinary Parasitology 2012, 186(1-2), 38-50.
• Symeou V, Edwards SA, Kyriazakis I. Modeling digestibility of dietary phosphorus in growing and finish pigs. Journal of Animal Science 2012, 90(suppl. 4), 59-61.
• Tolkamp BJ, Howie JA, Bley TAG, Kyriazakis I. Prandial correlations and the structure of feeding behaviour. Applied Animal Behaviour Science 2012, 137(1-2), 53-65.
• Leinonen I, Williams AG, Wiseman J, Guy J, Kyriazakis I. Predicting the environmental impacts of chicken systems in the UK through a Life Cycle Assessment: broiler production systems. Poultry Science 2012, 91(1), 8-25.
• Leinonen I, Williams AG, Wiseman J, Guy J, Kyriazakis I. Predicting the environmental impacts of chicken systems in the UK through a Life Cycle Assessment: egg production systems. Poultry Science 2012, 91(1), 26-40.
• Symeou V, Leinonen I, Edwards SE, Kyriazakis I. Prediction of digestible phosphorus and calcium retention and requirements for different pig genotypes. In: BSAS Annual Conference. 2012, Nottingham, UK.
• Leinonen I, Williams AG, Waller A, Kyriazakis I. Quantifying the effect of agricultural co-products inclusion in broiler and layer diets on Global Warming Potential of poultry products. In: BSAS/WPSA Annual Conference. 2012, Nottingham, UK.
• Leinonen I, Williams AG, Kyriazakis I. Quantifying the environmental impacts and their uncertainties for UK broiler and egg production systems. In: 8th International Conference on Life Cycle Assessment in the Agri-Food Sector (LCA Food 2012). 2012, Saint Malo, France.
• Sakkas P, Houdijk JGM, Athanasiadou S, Kyriazakis I. Sensitivity of periparturient breakdown of immunity to parasites to dietary protein source. Journal of Animal Science 2012, 90(11), 3954-3962.
• Doeschel-Wilson AB, Kyriazakis I. Should we aim for genetic improvement in host resistance or tolerance to infectious pathogens?. Frontiers in Genetics 2012, 3, 272.
• Szyszka O, Tolkamp BJ, Edwards SA, Kyriazakis I. The effects of acute versus chronic health challenges on the behaviour of beef cattle. Journal of Animal Science 2012, 90(12), 4308-4318.
• Doesch-Wilson AB, Villanueva B, Kyriazakis I. The first step toward genetic selection for host tolerance to infectious pathogens: obtaining the tolerance phenotype through group estimates. Frontiers in Genetics 2012, 3, 265.
• Laurenson YCSM, Bishop SC, Kyriazakis I. In silico exploration of the mechanisms that underlie parasite-induced anorexia in sheep. British Journal of Nutrition 2011, 106(7), 1023-1039.
• Giannenas I, Tsalie E, Chronis EF, Mavridis S, Tontis D, Kyriazakis I. Consumption of Agaricus bisporus mushroom affects the performance, intestinal micorbiota composition and morphology, and antioxidant status of turkey poults. Animal Feed Science and Technology 2011, 165(3-4), 218-229.
• Jones LA, Houdijk JGM, Sakkas P, Bruce AD, Mitchell M, Knox D, Kyriazakis I. Dissecting the impact of protein versus energy host nutrition on the experession of immunity to gastrointestinal parasites during lactation. International Journal for Parasitology 2011, 41(7), 711-719.
• Slade RD, Kyriazakis I, Carroll SM, Reynolds FH, Wellcok I, Broom LJ, Miller HM. Effect of rearing environment and dietary zinc oxide on the response of group-housed weaned pigs to enterotoxigenic Escherichia coli O149 challenge. Animal 2011, 5(8), 1170-1178.
• Howie JA, Avendano S, Tolkamp BJ, Kyriazakis I. Genetic parameters of feeding behavior traits and their relationship with live perfomance traits in modern broiler lines. Poultry Science 2011, 90(6), 1197-1205.
• Kyriazakis I, Tolkamp BJ. Hunger and Thirst. In: Appleby, M.C., Mench, J.A., Olsson, A.S., Hughes, B.O, ed. Animal Welfare. Wallingford, Oxon: CABI, 2011, pp.44-63.
• Kyriazakis I. Opportunities to improve nutrient efficiency in pigs and poultry through breeding. Animal 2011, 5(8), 821-832.
• Tolkamp BJ, Allcroft DJ, Barrio JP, Bley TAG, Howie JA, Jacobsen TB, Morgan CA, Schweitzer DPN, Wilkinson S, Yeates M, Kyriazakis I. The temporal structure of feeding behaviour. American Journal of Physiology: Regulatory, Integrative and Comparative Physiology 2011, 301(2), 378-393.
• Alzahal O, Alzahal H, Steele MA, VanSchaik M, Kyriazakis I, Duffield TF, McBride BW. The use of radiotelemetric ruminal bolus to detect body temperature changes in lactating dairy cattle. Journal of Dairy Science 2011, 94(7), 3568-3574.
• Gougoulis DA, Kyriazakis I, Fthenakis GC. Diagnostic significance of behaviour changes of sheep: A selected review. Small Ruminant Research 2010, 92(1-3), 52-56.
• Kidane A, Houdijk JGM, Athanasiadou S, Tolkamp BJ, Kyriazakis I. Effects of maternal protein nutrition and subsequent grazing on chicory (Cichorium intybus) on parasitism and performance of lambs. Journal of Animal Science 2010, 88(4), 1513-1521.
• Giannenas I, Tontis D, Tsalie E, Chronis EF, Doukas D, Kyriazakis I. Influence of dietary mushroom Agaricus bisporus on intestinal morphology and microflora composition in broiler chickens. Research in Veterinary Science 2010, 89(1), 78-84.
• Kyriazakis I. Is anorexia during infection in animals affected by food composition?. Animal Feed Science and Technology 2010, 156(1-2), 1-9.
• Kidane A, Houdijk JGM, Athanasiadou S, Tolkamp B, Kyriazakis I. Nutritional Sensitivity of pariparturient resistance to nematode parasites in two breeds of sheep with different nutrient demands. British Journal of Nutrition 2010, 104(10), 1477-1486.
• Giannenas I, Pappas IS, Mavridis S, Kontopidis G, Skoufos J, Kyriazakis I. Performance and antioxidant status of broiler chickens supplemented with dried mushrooms (Agaricus bisporus) in their diet. Poultry Science 2010, 89(2), 303-311.
• Howie JA, Tolkamp BJ, Bley T, Kyriazakis I. Short-term feeding behaviour has a similar structure in broilers, turkeys and ducks. British Poultry Science 2010, 51(6), 714-724.
• Fragkou IA, Dagleish MP, Papaioannou N, Cripps P, Boscos CM, Ververidis HN, Orfanou DC, Solomakos N, Finlayson J, Govaris A, Kyriazakis I, Fthenakis GC. The induction of lymphoid follicle-like structures in the ovine teat duct following experimental infection with Mannheimia haemolytica. The Veterinary Journal 2010, 184(2), 194-200.
• D'Eath RB, Tolkamp BJ, Kyriazakis I, Lawrence AB. 'Freedom from hunger' and preventing obesity: the animal welfare implications of reducing food quantity or quality. Animal Behaviour 2009, 77(2), 275-288.
• Howie JA, Tolkamp BJ, Avendano S, Kyriazakis I. A novel flexible method to split feeding behaviour into bouts. Applied Animal Behaviour Science 2009, 116(2-4), 101-109.
• Kyriazakis I, Doeschl-Wilson A. Anorexia during infection in mammals: variation and its sources. In: Torallardona, D., Roura, E, ed. Voluntary Food Intake in Pigs. Wageningen: Wageningen Academic Publishers, 2009, pp.307-322.
• Doeschl-Wilson AB, Kyriazakis I, Vincent A, Rothschild MF, Thacker E, Galina-Pantoja L. Clinical and pathological responses of pigs from two genetically diverse commercial lines to porcine reproductive and respiratory syndrome virus infection. Journal of Animal Science 2009, 87(5), 1638-1647.
• Kidane A, Houdijk JGM, Tolkamp BJ, Athanasiadou S, Kyriazakis I. Consequences of infection pressure and protein nutrition on periparturient resistance to Teladorsagia circumcincta and performance in ewes. Veterinary Parasitology 2009, 165(1-2), 78-87.
• Zaralis K, Tolkamp BJ, Houdijk JGM, Wylie ARG, Kyriazakis I. Consequences of protein supplementation for anorexia, expression of immunity and plasma leptin concentrations in parasitized ewes of two breeds. British Journal of Nutrition 2009, 101(4), 499-509.
• Coltherd JC, Bunger L, Kyriazakis I, Houdijk JGM. Genetic growth potential interacts with nutrition on the ability of mice to cope with Heligmosomoides bakeri infection. Parasitology 2009, 136(9), 1043-1055.
• Jones LA, Koudijk JGM, Knox DP, Kyriazakis I. Immunomodulatory effects of dietary protein during Nippostrongylus brasiliensis re-infection in lactating rats. Parasite Immunology 2009, 31(7), 412-421.
• Houdijk JGM, Jackson F, Kyriazakis I. Nutritional sensitivity of resistance to Trichostrongylus colubriformis in lactating ewes. Veterinary Parasitology 2009, 160(3-4), 258-266.
• Giannenas I, Kyriazakis I. Phytobased products for the control of intestinal diseases in chickens in the post antibiotic era. In: Steiner, T, ed. Phytogenics in Animal Nutrition: Natural Concepts to Optimize Gut Health and Performance. Nottingham: Nottingham University Press, 2009, pp.61-85.
• Kyriazakis I, Athanasiadou S, Giannenas I, Papachristou TG. The consequences of nutrition on the outcome of parasitic challenges on small ruminants. Options Mediterraneennes. Serie A: Seminaires Mediterraneens 2009, 85, 29-40.
• Wellock IJ, Houdijk JGM, Miller AC, Gill BP, Kyriazakis I. The effect of weaner diet protein content and diet quality on the long-term performance of pigs to slaughter. Journal of Animal Science 2009, 87(4), 1261-1269.
• Giannenas I, Kyriazakis I. The inclusion of aromatic plants in chicken diets and their potential for the control of chicken coccidiosis. In: Binder E.M., Schatzmayr, D, ed. World Nutrition forum: The Future of Animal Production. Nottingham: Nottingham University Press, 2009, pp.187-207.
• Howie JA, Tolkamp BJ, Avendano S, Kyriazakis I. The structure of feeding behavior in commercial broiler lines selected for different growth rates. Poultry Science 2009, 88(6), 1143-1150.
• Tolkamp BJ, Kyriazakis I. Toward a new practical energy evaluation system for dairy cows. Animal 2009, 3(2), 307-314.
• Giannenas I, Nisianakis P, Gavriil A, Kontopidis G, Kyriazakis I. Trace mineral content of conventional, organic and courtyard eggs analysed by inductively coupled plasma mass spectrometry (ICP-MS). Food Chemistry 2009, 114(2), 706-711.
• Doeschl-Wilson AB, Brindle W, Emmans G, Kyriazakis I. Unravelling the Relationship between Animal Growth and Immune Response during Micro-Parasitic Infections. PLoS ONE 2009, 4(10), e7508.
• Nisianakis P, Giannenas I, Gavriil A, Kontopidis G, Kyriazakis I. Variation in Trace Element Contents Among Chicken, Turkey, Duck, Goose, and Pigeon Eggs Analyzed by Inductively Coupled Plasma Mass Spectrometry (ICP-MS). Biological Trace Element Research 2009, 128(1), 62-71.
• González LA, Tolkamp BJ, Coffey MP, Ferret A, Kyriazakis I. Changes in feeding behavior as possible indicators for the automatic monitoring of health disorders in dairy cows. Journal of Dairy Science 2008, 91(3), 1017-1028.
• Zaralis K, Tolkamp BJ, Houdijk JGM, Wylie ARG, Kyriazakis I. Changes in food intake and circulating leptin due to gastrointestinal parasitism in lambs of two breeds. Journal of Animal Science 2008, 86(8), 1891-1903.
• Wellock IJ, Fortomaris PD, Houdijk JGM, Kyriazakis I. Effects of dietary protein supply, weaning age and experimental enterotoxigenic Escherichia coli infection on newly weaned pigs: health. Animal 2008, 2(6), 834-842.
• Wellock IJ, Fortomaris PD, Houdijk JGM, Kyriazakis I. Effects of dietary protein supply, weaning age and experimental enterotoxigenic Escherichia coli infection on newly weaned pigs: performance. Animal 2008, 2(6), 825-833.
• Fragkou IA, Solomakos N, Dagleish MP, Cripps PJ, Papaioannou N, Boscos CM, Ververidis HN, Billinis C, Orfanou DC, Govaris A, Kyriazakis I, Fthenakis GC. Effects of experimental challenge of ewes with Mannheimia haemolytica on subsequent milk composition. Journal of Dairy Research 2008, 75(3), 340-346.
• Gougoulis DA, Kyriazakis I, Tzora A, Taitzoglou IA, Skoufos J, Fthenakis GC. Effects of lamb sucking on the bacterial flora of teat duct and mammary gland of ewes. Reproduction in Domestic Animals 2008, 43(1), 22-26.
• Athanasiadou S, Houdijk J, Kyriazakis I. Exploiting synergisms and interactions in the nutritional approaches to parasite control in sheep production systems. Small Ruminant Research 2008, 76(1-2), 2-11.
• Doeschl-Wilson AB, Vagenas D, Kyriazakis I, Bishop SC. Exploring the assumptions underlying genetic variation in host nematode resistance. Genetics Selection Evolution 2008, 40(3), 241-264.
• Florou M, Leontides L, Kostoulas P, Billinis C, Sofia M, Kyriazakis I, Lykotrafitis F. Isolation of Mycobacterium avium subspecies paratuberculosis from non-ruminant wildlife living in the sheds and on the pastures of Greek sheep and goats. Epidemiology and Infection 2008, 136(5), 644-652.
• Gougoulis DA, Kyriazakis I, Papaioannou N, Papadopoulos E, Taitzoglou IA, Fthenakis GC. Subclinical mastitis changes the patterns of maternal-offspring behaviour in dairy sheep. The Veterinary Journal 2008, 176(3), 378-384.
• Wellock IJ, Fortomaris PD, Houdijk JGM, Wiseman J, Kyriazakis I. The consequences of non-starch polysaccharide solubility and inclusion level on the health and performance of weaned pigs challenged with enterotoxigenic Escherichia coli. British Journal of Nutrition 2008, 99(3), 520-530.
• Alvarez LRD, Greer AW, Jackson F, Athanasiadou S, Kyriazakis I, Huntley JF. The effect of dietary sainfoin (Onobrychis viciifolia) on local cellular responses to Trichostrongylus colubriformis in sheep. Parasitology 2008, 139(9), 1117-1124.
• Acamovic T, Sandilands V, Kyriazakis I, Sparks N. The effect of organic diets on the performance of pullets maintained under semi-organic conditions. Animal 2008, 2(1), 117-124.
• Kyriazakis I, Sandberg FB, Brindle WM. The prediction of the consequences of pathogen challenges on the performance of growing pigs. In: France, J; Kebreab, E, ed. Mathematical Modelling in Animal Nutrition. Oxon: CAB International, 2008, pp.398-418.