this experiment was conducted to evaluate the effects of different levels of portulaca oleracea (po),medicinal plant, on performance, egg traits, blood biochemical and immunity parameters of laying hens. one hundred eighty hi-line (w-36 strain) mature laying hens 65 up to 76 weeks of age were allotted in a completely randomized design consisting of 5 treatments and 3 replicates (12 birds per re...

Egg yolk constitutes the main storage compartment of the avian egg and the first nutritional source that supports embryonic growth. Most egg yolk components are synthesized by the liver of laying hens at sexual maturity and are secreted into the blood to be further transferred into the ovarian oocyte (yolky follicle) by receptor-mediated endocytosis. Egg yolk proteins are secreted as precursors...

this experiment was conducted to evaluate the effects of different levels of dried aerial parts powderand extract of pennyroyal­ (mentha pulegium) medicinal plant on performance, egg traits, blood biochemical and immunity parameters of laying hens. two-hundred-fifty-two hi-line (w36 strain) laying hens from 46 until 58 weeks of age were used in a completely randomized design in 7 treatments and...

White (Lohmann LSL) and Brown (ATAK-S) laying hens, were reared under organic and conventional cage rearing systems, and the effects of the rearing system on performance parameters, egg production, egg characteristics, and immune response were investigated. For this purpose, a total of 832 laying hens of two commercial hybrids, i.e., 416 white (Lohmann LSL) and 416 Brown (ATAK-S) layers, were u...

Aim: The aim was to study the seroconversion and development of egg yolk immunoglobulins in adult laying White Leghorn hens immunized against an isolate of enterotoxigenic Escherichia coli (ETEC) bearing K91 and K88ac antigens, obtained from diarrheic piglet. Materials and Methods: Adult laying White Leghorn hens were immunized with inactivated enterotoxic E. coli strain isolated originally fro...

The faba bean (Vicia faba L.) is a potential source of proteins for poultry, mainly for laying hens whose protein requirements are lower than those of other birds such as growing broilers and turkeys. However, this feedstuff contains anti-nutritional factors, that is, vicine (V) and convicine (C) that are already known to reduce laying hen performance. The aim of the experiment reported here wa...

objective: the purpose of the study was to evaluate the production of antibodies in serum as well as egg yolk raised against s. typhimurium and the cross-reactivity of this antibody with other enteric bacteria. materials and methods: white egg–laying hens were immunized with s. typhimurium, heat-killed whole cell, in freund's adjuvant. immunization was done with 107 conlony forming unit (cfu) o...

Egg has valuable nutrients however; these may be affected by many factors. In this study, it was aimed to determine the effects of cage type, oviposition time and egg storage period on quality characteristics laying hens. A total 410 eggs were collected from unenriched enriched cages in morning afternoon. After weighed, they stored at 21oC 20% relative humidity until 30th day storage. It determ...

introduction apple is one of the most important fruits that is produced in the large amount in iran. it is a good source of vitamins and minerals and active fiber. most of the apples that product in iran are use in food industry for producing different kinds of apple juices. after juicing, more than 20% of apple, remain as waste. the remained matter contain considerable amount of vitamins and m...

AIM This study was undertaken to compare the immunoglobulin Y (IgY) level and its efficacy in laying hens of four different breeds of poultry (viz., Vanraja, Gramapriya, BlackRock, and KalingaBrown) and its relative transfer in egg yolk and chick. MATERIALS AND METHODS This study was conducted in 48 apparently healthy laying hens vaccinated with Salmonella inactivated polyvalent vaccine, eggs...