Search Results

You are looking at 91 - 100 of 460 items for :

Clear All

Gowdy, K. M., Edens, F. W. (2005) Organoselenium in yeast (Sel-Plex) does not produce overt signs of toxicity in young broiler chickens. Nutritional Biotechnology in the Feed and Food Industries. Proc. 21 st Ann. Symp. (Suppl. 1.) Lexington, p. 81

Restricted access

The effect of supplementary methionine and fats of different saturation levels on the glutathione redox system of growing broiler cockerels was studied. The diet of three groups of chicks was supplemented with corn germ oil, beef tallow and fish oil at the levels of 30 g/kg and 50 g/kg of feed, respectively. The diet of further three groups was supplemented with methionine (5 g/kg of feed) in addition to the different fat sources. Control chicks were fed with a compound feed without methionine and fat supplementation. Reduced glutathione (GSH) and glutathione disulphide (GSSG) content as well as glutathione peroxidase activity in the liver were determined and GSH/GSSG ratio was calculated at day old and then at one and three weeks of age. Our results indicate that supplementary methionine stimulates both the synthesis of the glutathione redox system and glutathione peroxidase activity in growing chickens in the first period of postnatal life, when the risk of lipid peroxidation is high due to feeding unsaturated fats in the diet.

Restricted access

The lipid profiles of brain from 10- and 18-day-old chick embryo, 1-day-old chick, and adult chicken as well as of full-term fetus rat, 21-day-old male, young adult male, and pregnant female rats were analyzed by thin-layer chromatography and densitometry. The emphasis was on the major glycolipids of brain during myelination (i.e., galactocyl diglyceride (GDG) normal fatty acid and hydroxyl fatty acid ceramide monohexosides (n-CMH, h-CMH, respectively)), and sulfatides (S) as well as the choline lipids sphingomyelin (SM), phosphatidyl choline (PC) and the two species of phosphatidyl ethanolamine plasmalogen (PE1 and PE2).Ten-day-old chick embryo brain revealed a low concentration of glycolipids, which increased gradually during development, and reached the highest level in the adult chicken brain. Rat brain did not begin to show the presence of these glycolipids until 21 days old. In addition, PE (i.e., PE1 and PE2) was shown to be the only alkenyle phospholipid in all samples analyzed. PE2 was shown to correlate with the myelination process. PC and SM were also present. SM concentration was very low in 1-day-old chick and 21-day-old rat brains and increased gradually, reaching its highest level in the adult chicken and rat brains.

Restricted access

The presence of the vanA gene was determined in enterococci from healthy poultry, originating from the Hungarian resistance monitoring system between 2001 and 2004. Enterococci (n = 562) were collected from intestinal samples of slaughtered broiler chickens. The presence of van genes was detected by polymerase chain reaction (PCR). The vancomycin-resistant enterococcus (VRE) strains carried only the vanA gene. Genus- and species-level identification of the vanA gene carrier strains was carried out by PCR using specific primers. In 2001, 25 out of the 289 isolated strains (8.6%) were vanA carriers (1 Enterococcus mundtii , 13 E. durans and 11 E. faecium ). In 2002 (n = 87), 20 (23%) strains were vanA positive (11 E. durans and 9 E. faecium ). In 2003 and 2004, none of the strains (n = 95 and 91, respectively) were positive for the most common van genes. In 2003, there was only one strain for which higher minimum inhibitory concentrations (MIC) of vancomycin (4 mg/L) and teicoplanin (8 mg/L) were found. In 2004 there were three strains for which the MIC of vancomycin was 8 mg/L, and 2 strains and 1 strain with teicoplanin MICs of 4 mg/L and 8 mg/L, respectively. The potential similarity of these strains was studied by pulsed-field gel electrophoresis (PFGE). The VRE strains were not closely related to one another. The annual data of vancomycin resistance indicate an association between the recovery of vancomycin-resistant enterococci and the use of avoparcin in animal feeds. This study indicates that with the reduced use of antibiotics in food animals, it is possible to decrease the rate of resistant bacteria. Although the use of avoparcin had been banned in 1998, the VRE strains disappeared only five years later.

Restricted access
Acta Veterinaria Hungarica
Authors: Mangesh Nakade, Csilla Pelyhe, Benjámin Kövesi, Krisztián Balogh, Balázs Kovács, Judit Szabó-Fodor, Erika Zándoki, Miklós Mézes and Márta Erdélyi

impact of the Fusarium mycotoxin deoxynivalenol on the health and performance of broiler chickens . Int. J. Mol. Sci. 12 , 7996 – 8012 . Awad , W. A. , Vahjen , W. , Aschenbach

Open access

Introduction Newcastle disease virus (NDV) is one of the main poultry pathogens causing a lethal disease that affects mainly chickens and turkeys, resulting in devastating economic losses in poultry production. In Egypt, the endemic occurrence of

Restricted access

. and Gelencsér, E. (1998): Effects of phytase supplementation on calcium and phosphorus output, production traits and mechanical stability of the tibia in broiler chickens. Acta Vet. Hung. 46 , 231-242. Effects of phytase

Restricted access

The action of a range of N terminally modified peptides structurally related to the nematode peptide PF1, SDPNFLRFamide, has been investigated using a dorsal muscle strip preparation from the chicken nematode, Ascaridia galli. Acetylcholine contracts this muscle preparation in a concentration-dependent manner when applied in the range 1-100 µM with an EC50 value of 9 µM. These contractions are reduced in the presence of PF1 and its analogues, with a threshold effect of PF1 of around 1 nM and an IC50 value of 470 nM against 10 µM acetylcholine. All the PF1 analogues tested were less potent than PF1 in reducing the acetylcholine contractions, indicating the importance of the N terminal amino acids in the action of PF1 in this preparation.

Restricted access

, paradoxical, philosophical, processional, and theoretical possibilities associated with the perennial question as to which came first, the chicken or the egg, the same question may also be asked in the context of which came first, the great paper or the great

Restricted access
European Journal of Microbiology and Immunology
Authors: Alex M. Nasaré, Roberto C. Tedesco, Priscila C. Cristovam, Marcos A. Cenedese, Andrés J. Galisteo Jr., Heitor F. Andrade Jr., José Álvaro P. Gomes, Érik V. Guimarães, Helene S. Barbosa and Luis G. Alonso

. Shin DH , Kim HJ , Kim J , Baer SR , Cho SS : Heat shock protein 108 mRNA expression during chicken retina development . Neurosci Lett 344 , 25 – 28 ( 2003 ) 13

Open access