Sfoglia per Autore "Kyriazakis, I."
Items 1-20 di 66
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Anorexia during infection in mammals: Variation and its sources
Kyriazakis, I.; Doeschl-Wilson, A. (2009)A reduction in the voluntary food intake of animals, henceforth called anorexia, accompanies their exposure to pathogens and antigenic challenges. Whilst the phenomenon is well established, its timing, magnitude, duration ... -
Body fatness affects feed intake of sheep at a given body weight
Tolkamp, B. J.; Emmans, G. C.; Kyriazakis, I. (2006)In a 1-yr experiment, nutritional treatments were used to produce different combinations of BW and BCS in lambs. The experiment served to quantify the effects of BW and BCS on ADFI by sheep. Ewe lambs (n = 78) were assigned ... -
Changes in feeding behavior as possible indicators for the automatic monitoring of health disorders in dairy cows
Gonzalez, L. A.; Tolkamp, B. J.; Coffey, M. P.; Ferret, A.; Kyriazakis, I. (2008)Changes in short-term feeding behavior of dairy cows that occur with the onset of the health disorders ketosis, acute locomotory problems, and chronic lameness were investigated using data collected during previous ... -
Changes in food intake and circulating leptin due to gastrointestinal parasitism in lambs of two breeds
Zaralis, K.; Tolkamp, B. J.; Houdijk, J. G. M.; Wylie, A. R. G.; Kyriazakis, I. (2008)HA reduction in food intake is a prominent feature of many infectious diseases. However, the underlying mechanisms of parasite-induced anorexia in sheep are poorly understood. Here, we tested the hypotheses (a) that the ... -
Clinical and pathological responses of pigs from two genetically diverse commercial lines to porcine reproductive and respiratory syndrome virus infection
Doeschl-Wilson, A. B.; Kyriazakis, I.; Vincent, A.; Rothschild, M. F.; Thacker, E.; Galina-Pantoja, L. (2009)The response to infection from porcine reproductive and respiratory syndrome virus (PRRSV) for 2 genetically diverse commercial pig lines was investigated. Seventy-two pigs from each line, aged 6 wk, were challenged with ... -
Consequences of infection pressure and protein nutrition on periparturient resistance to Teladorsagia circumcincta and performance in ewes
Kidane, A.; Houdijk, J. G. M.; Tolkamp, B. J.; Athanasiadou, S.; Kyriazakis, I. (2009)The consequences of protein nutrition on the degree of periparturient relaxation of immunity to nematode parasites in sheep may be more pronounced at higher levels of infection pressure. Here, we investigated interactive ... -
The consequences of non-starch polysaccharide solubility and inclusion level on the health and performance of weaned pigs challenged with enterotoxigenic Escherichia coli
Wellock, I. J.; Fortomaris, P. D.; Houdijk, J. G. M.; Wiseman, J.; Kyriazakis, I. (2008)The inclusion of insoluble NSP (iNSP) in weaner pig diets has been reported to decrease post-weaning colibacillosis (PWC). Conversely, soluble NSP (sNSP) have been shown to exacerbate PWC. The present study investigated ... -
Consequences of protein supplementation for anorexia, expression of immunity and plasma leptin concentrations in parasitized ewes of two breeds
Zaralis, K.; Tolkamp, B. J.; Houdijk, J. G. M.; Wylie, A. R. G.; Kyriazakis, I. (2009)The periparturient relaxation of immunity (PPRI) against parasites in ewes has a nutritional basis. We investigated whether ewes experience a reduction in food intake (anorexia) during PPRI and if the magnitude of anorexia ... -
Consumption of Agaricus bisporus mushroom affects the performance, intestinal microbiota composition and morphology, and antioxidant status of turkey poults
Giannenas, I.; Tsalie, E.; Chronis, E.; Mavridis, S.; Tontis, D.; Kyriazakis, I. (2011)We investigated the consequences of consumption of Agaricus bisporus mushroom on turkey poults fed ad libitum a basal diet supplemented with the dried mushroom at levels of 0, 10 or 20 g/kg feed (treatments: CON, M10, M20) ... -
Diagnostic significance of behaviour changes of sheep: A selected review
Gougoulis, D. A.; Kyriazakis, I.; Fthenakis, G. C. (2010)Sheep welfare is the combination of subjective and objective (qualitative and quantitative) aspects of the conditions of life of animals, including health and disease, behaviour. husbandry and management; thus, it is a ... -
Dietary protein and energy supplies differentially affect resistance to parasites in lactating mammals
Sakkas, P.; Houdijk, J. G. M.; Jones, L. A.; Knox, D. P.; Kyriazakis, I. (2011)Periparturient relaxation of immunity (PPRI) to parasites in mammals results in higher worm burden and worm egg excretion and may have a nutritional basis. Nippostrongylus brasiliensis re-infected lactating rats fed low-crude ... -
Differences in susceptibility to Mannheimia haemolytica-associated mastitis between two breeds of dairy sheep
Fragkou, I. A.; Skoufos, J.; Cripps, P. J.; Kyriazakis, I.; Papaioannou, N.; Boscos, C. M.; Tzora, A.; Fthenakis, G. C. (2007)We used a Mannheimia haemolytica isolate to study differences in susceptibility to experimental mastitis between two breeds of dairy sheep. The isolate was deposited into the teat duct of Karagouniko (K, n=8) or Frisarta ... -
The effect of chicory (Cichorium intybus) and sulla (Hedysarum coronarium) on larval development and mucosal cell responses of growing lambs challenged with Teladorsagia circumcincta
Tzamaloukas, O.; Athanasiadou, S.; Kyriazakis, I.; Huntley, J. F. (2006)The aim of this study was to investigate the effects of grazing different bioactive forages on acquired immunity against Teladorsagia circumcinta infection. The development of immunity was assessed by following the response ... -
Effect of dietary non-starch polysaccharide solubility and inclusion level on gut health and the risk of post weaning enteric disorders in newly weaned piglets
Wellock, I. J.; Houdijk, J. G. M.; Kyriazakis, I. (2007)The objective of this experiment was to investigate the effect of non-starch polysaccharide (NSP) solubility and inclusion rate on gut health and development, performance and risk of post weaning enteric disorders (PWED) ... -
The effect of dietary protein supply on the performance and risk of post-weaning enteric disorders in newly weaned pigs
Wellock, I. J.; Fortomaris, P. D.; Houdijk, J. G. M.; Kyriazakis, I. (2006)The effect of dietary protein supply, as manipulated by both crude protein content and/or substitution of existing ingredients, mainly soya (SOYA), with the more digestible dried skimmed milk powder (DSMP), and the ... -
Effect of different calcium sources and calcium intake on shell quality and bone characteristics of laying hens at sexual maturity and end of lay
Koutoulis, K. C.; Kyriazakis, I.; Perry, G. C.; Lewis, P. D. (2009)The influence of supplemental calcium given in flour or granular form and calcium intake on bone properties and egg characteristics of brown-egg laying hens was investigated at sexual maturity and at end of lay. Physical ... -
Effect of Melissa officinalis supplementation on growth performance and meat quality characteristics in organically produced broilers
Kasapidou, E.; Giannenas, I.; Mitlianga, P.; Sinapis, E.; Bouloumpasi, E.; Petrotos, K.; Manouras, A.; Kyriazakis, I. (2014)1. A trial was conducted to study the effect of Melissa officinalis supplementation on organic broiler performance and meat chemical, microbiological, sensory and nutritional quality. 2. Male and female day-old Ross 308 ... -
The effect of weaner diet protein content and diet quality on the long-term performance of pigs to slaughter
Wellock, I. J.; Houdijk, J. G. M.; Miller, A. C.; Gill, B. P.; Kyriazakis, I. (2009)Short and long-term effects of manipulating dietary CP content and diet quality in weaner diets on health and performance of pigs were investigated in a 2 x 2 factorial combination of CP inclusion (high-CP, 230 g of CP/kg ... -
Effect of weaning age, protein nutrition and enterotoxigenic Escherichia coli challenge on the health of newly weaned piglets
Wellock, I. J.; Fortomaris, P. D.; Houdijk, J. G. M.; Kyriazakis, I. (2007)The objective of this experiment was to determine whether decreasing dietary protein content and increasing weaning age could improve piglet health and decrease the occurrence and severity of post-weaning colibacillosis ... -
The effects of changes in nutritional demand on gastrointestinal parasitism in lactating rats
Normanton, H.; Houdijk, J. G. M.; Jessop, N. S.; Knox, D. P.; Kyriazakis, I. (2007)Lactating rats experience a breakdown of immunity to parasites, i.e. they carry larger worm burdens after re-infection compared to their non-lactating counterparts. Feeding high-protein foods to lactating rats results in ...