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...

abstract  introduction: this experiment was conducted to study the effects of different levels of flaxseed (0, 5, 10 and 15% of diet) and copper (in the form of cupric sulfate pentahydrate, 0 and 250 ppm of diet) on fatty acids and cholesterol in egg yolk of laying hens. methods: a total of 128 white leghorn layers aged 50 weeks were used in a factorial design and randomly assigned to 8 treatme...

this study was conducted to evaluate the effect of egg yolk and cooling on ram coated spermatozoa. semen was collected from three ram by artificial vagina contacted with a tube containing tris- fructose-egg yolk 15%. samples were pooled, centrifuged by 700 g for 10 min and removed supernatant. then, samples were diluted by tris-glucose and centrifuged again to remove seminal plasma and egg yolk...

Carotenoids are partially responsible for the colors of plants and when consumed by humans and animals are deposited into tissues (e.g., skin and egg yolk in laying hens) and may have health benefits. Because carotenoids are more available when consumed from egg yolk sources than vegetables, this research examined the ability of the laying hen to deposit dietary lycopene, a carotenoid that impa...

BACKGROUND Hen's egg allergy is a frequent cause of childhood food allergy. Egg yolk is used in various commonly consumed foods; if children with allergy to hen's egg could eat heated egg yolk, their quality of life (QOL) would improve. No reports exist regarding oral food challenges (OFCs) for heated egg yolk. We aimed to clarify whether pediatric patients allergic to hen's egg could consume h...

The development of an assay for the quantification of chicken immunoglobulin (IgY) and data evaluation is being demonstrated. An enzyme immunoassay was established to perform the quality control of IgY purifications from the egg yolk and to control IgY producing cells in vitro. Each step of the test procedure and possible alternatives were described. The assay was characterized by special test ...

In Vietnam, numerous surveillance programs are conducted to monitor the prevalence of avian influenza (AI) viruses. Three serological methods-the agar-gel immunodiffusion test, hemagglutination inhibition (HI) test, and enzyme-linked immunosorbent assay-are well established for detection of AI virus antibodies in poultry sera. Several recent reports have validated egg yolk as an alternative sou...

background: cryptosporidium parvum is a parasitic protozoan that functions as important causa­tive agent of diarrhea in human and animals. the host's immune response to surface anti­gens of c. parvum has been previously demonstrated. in this respect, the role of humoral immu­nity in the development of host protective immunity against this protozoon has been well demon­strated. methods: the effe...

introduction chicken is the only avian species in which polyclonal antibodies, like igg is transported from the hen to the egg yolk in a similar manner as the transport of mammalian igg from the mother to the fetus. immunoglobulin y in the chicken is transported to the egg and accumulates in the egg yolk in large quantities. igy is an egg yolk antibody that has been used widely for treatment an...

objective(s): atherosclerosis is the main leading cause of cardiovascular diseases. the purpose of this study was to assess the potential preventive effect of egg yolk hdl on the atherosclerosis plaque formation. materials and methods: thirty rabbits were divided into five groups: a; normal diet, b; hyper-cholesterolemic diet, c; hypercholesterolemic + 400 mg/kg egg yolk hdl d; hypercholesterol...