Πλοήγηση ανά Συγγραφέα "Kyriazakis, I."
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Effects of dietary protein supply, weaning age and experimental enterotoxigenic Escherichia coli infection on newly weaned pigs: health
Wellock, I. J.; Fortomaris, P. D.; Houdijk, J. G. M.; Kyriazakis, I. (2008)Weaning is often associated with post-weaning colibacillosis (PWC), caused by enterotoxigenic Escherichia coli (ETEC). The objective was to investigate the effects of manipulating dietary protein supply and increasing ... -
Effects of dietary protein supply, weaning age and experimental enterotoxigenic Escherichia coli infection on newly weaned pigs: performance
Wellock, I. J.; Fortomaris, P. D.; Houdijk, J. G. M.; Kyriazakis, I. (2008)An experiment was conducted to investigate the effects of post-weaning dietary protein supply and weaning age on the performance of pigs in the absence of in-feed antimicrobial growth promoters (AGP) when artificially ... -
Effects of essential oils on milk production, milk composition, and rumen microbiota in Chios dairy ewes
Giannenas, I.; Skoufos, J.; Giannakopoulos, C.; Wiemann, M.; Gortzi, O.; Lalas, S.; Kyriazakis, I. (2011)The effect of the addition of an essential oil (EO) preparation (containing a mixture of natural and nature-identical EO) on the performance of dairy ewes of the Chios breed was investigated. Eighty lactating ewes were ... -
Effects of experimental challenge of ewes with Mannheimia haemolytica on subsequent milk composition
Fragkou, I. A.; Solomakos, N.; Dagleish, M. P.; Cripps, P. J.; Papaioannou, N.; Boscos, C. M.; Ververidis, H. N.; Billinis, C.; Orfanou, D. C.; Govaris, A.; Kyriazakis, I.; Fthenakis, G. C. (2008)The objective was to describe the physicochemical changes during the early phase of subclinical mastitis and to associate them with pathological findings. A Mannheimia haemolytica strain was deposited into one teat duct ... -
Effects of lamb sucking on the bacterial flora of teat duct and mammary gland of ewes
Gougoulis, D. A.; Kyriazakis, I.; Tzora, A.; Taitzoglou, I. A.; Skoufos, J.; Fthenakis, G. C. (2008)We aimed (i) to determine differences in bacterial flora of teat duct and mammary gland of ewes before and after suckling, (ii) to evaluate factors potentially affecting those. We collected samples of teat duct material ... -
Effects of maternal protein nutrition and subsequent grazing on chicory (Cichorium intybus) on parasitism and performance of lambs
Kidane, A.; Houdijk, J. G. M.; Athanasiadou, S.; Tolkamp, B. J.; Kyriazakis, I. (2010)Forty-eight 4- to 5-yr-old Blackface x Bluefaced Leicester (Mule) ewes and their 24-d-old twin lambs were used to assess the effects of maternal protein nutrition and subsequent grazing on chicory (Cichorium intybus) on ... -
Effects of nematode infection on anorexia and leptin levels in lambs of two breeds
Zaralis, K.; Tolkamp, B. J.; Houdijk, J. G. M.; Wylie, A. R. G.; Kyriazakis, I. (2007)The objective of this study was to investigate whether breed differences in production potential are associated with differences in the occurrence of anorexia following a nematode infection and whether plasma leptin ... -
The effects of pathogen challenges on the performance of naive and immune animals: the problem of prediction
Sandberg, F. B.; Emmans, G. C.; Kyriazakis, I. (2007)Predictive frameworks for performance under both physical and social stressors are available, but no general framework yet exists for predicting the performance of animals exposed to pathogens. The aim of this paper was ... -
Effects of sub-clinical post-weaning colibacillosis and dietary protein on acute phase proteins in weaner pigs
Houdijk, J. G. M.; Campbell, F. M.; Fortomaris, P. D.; Eckersall, P. D.; Kyriazakis, I. (2007)There is an increasing body of evidence that plasma acute phase proteins (APP) can be used as a marker to assess pig health. The objective of this study was to assess whether experimentally induced sub-clinical post-weaning ... -
Exploiting synergisms and interactions in the nutritional approaches to parasite control in sheep production systems
Athanasiadou, S.; Houdijk, J.; Kyriazakis, I. (2008)Occurrence of resistance to anthelmintics and increased awareness about drug residues entering the food chain and harming the environment, have called for a reduction in the regular, preventive use of anthelmintics and an ... -
Exploring the assumptions underlying genetic variation in host nematode resistance (Open Access Publication)
Doeschl-Wilson, A. B.; Vagenas, D.; Kyriazakis, I.; Bishop, S. C. (2008)The wide range of genetic parameter estimates for production traits and nematode resistance in sheep obtained from field studies gives rise to much speculation. Using a mathematical model describing host - parasite ... -
Foreword: Predicting the responses of animals to their nutrients - quo vadimus?
Kyriazakis, I. (2007) -
'Freedom from hunger' and preventing obesity: the animal welfare implications of reducing food quantity or quality
D'Eath, R. B.; Tolkamp, B. J.; Kyriazakis, I.; Lawrence, A. B. (2009)In animals, including humans, free access to high-quality (generally energy-dense) food can result in obesity, leading to physiological and health problems. Consequently, various captive animals, including laboratory and ... -
Genetic growth potential interacts with nutrition on the ability of mice to cope with Heligmosomoides bakeri infection
Coltherd, J. C.; Bnger, L.; Kyriazakis, I.; Houdijk, J. G. M. (2009)Artificial selection for improved productivity may reduce an animal's ability to cope with pathogens. Here, we used Roslin mice, uniquely divergently selected for high (ROH) and low (ROL) body weight, to assess interactive ... -
Genome-Wide Transcriptomic Analysis of Intestinal Tissue to Assess the Impact of Nutrition and a Secondary Nematode Challenge in Lactating Rats
Athanasiadou, S.; Jones, L. A.; Burgess, S. T. G.; Kyriazakis, I.; Pemberton, A. D.; Houdijk, J. G. M.; Huntley, J. F. (2011)Background: Gastrointestinal nematode infection is a major challenge to the health and welfare of mammals. Although mammals eventually acquire immunity to nematodes, this breaks down around parturition, which renders ... -
Immunomodulatory effects of dietary protein during Nippostrongylus brasiliensis re-infection in lactating rats
Jones, L. A.; Houdijk, J. G. M.; Knox, D. P.; Kyriazakis, I. (2009)Periparturient relaxation of immunity (PPRI) to secondary infection with nematodes is believed to have a nutritional basis due to differential partitioning of scarce nutrient resources, particularly protein, to reproductive ... -
Immunonutrition: Nutritional control of parasites
Kyriazakis, I.; Houdijk, J. (2006)Whilst it has long been known that improved protein nutrition can increase resilience, i.e. reduce the consequences of subclinical gastrointestinal nematode parasitism on sheep performance, improved protein nutrition can ... -
In silico exploration of the effects of host genotype and nutrition on the genetic parameters of lambs challenged with gastrointestinal parasites
Vagenas, D.; Doeschl-Wilson, A.; Bishop, S. C.; Kyriazakis, I. (2007)An in silico mathematical model was used to explore the effect of, and the interaction between, (i) nutrition, (ii) genotype for growth and (iii) genotype for resistance, on the estimates of genetic parameters for resistance ... -
In silico exploration of the mechanisms that underlie parasite-induced anorexia in sheep
Laurenson, Ycsm; Bishop, S. C.; Kyriazakis, I. (2011)A model was used to investigate two mechanisms describing reductions in food intake (anorexia) observed during gastrointestinal parasitism in lambs, and to explore relationships between anorexia and food composition. The ... -
The induction of lymphoid follicle-like structures in the ovine teat duct following experimental infection with Mannheimia haemolytica
Fragkou, I. A.; Dagleish, M. P.; Papaioannou, N.; Cripps, P. J.; Boscos, C. M.; Ververidis, H. N.; Orfanou, D. C.; Solomakos, N.; Finlayson, J.; Govaris, A.; Kyriazakis, I.; Fthenakis, G. C. (2010)The objectives of this study were to investigate the early stages of experimental infection of the ovine mammary gland with Mannheimia haemolytica and to identify the lymphocyte subsets accumulating at the teat duct. M. ...