I . Pooled samples of eggs from White Leghorn and New Hampshire hens given diets containing 110 and zoo g protein/kg were analysed for their content of essential amino acids. 2. The amino acid composition of the hen’s egg protein was not significantly affected by variations in breed and diet. 3. The estimated values for lysine, total sulphur-containing amino acids and tryptophan in egg protein ...

One-day-old specific-pathogen-free White Leghorn chicks were inoculated orally with Salmonella enteritidis phage type 4 to study adhesion and invasion of the ceca by immunohistochemistry. Positive staining bacilli were associated with the epithelial surface and were present in the lumen of the cecal crypts. They were observed in the interstitial tissue and in the cytoplasm of macrophage-like ce...

Hens (White Leghorn) were immunized with different protein antigens and antibodies were isolated from eggs by PEG precipitation. To determine experimental conditions under which optimal antibody titers are reached the antigen dose and the mode of application were varied. Injecting the antigen three times every four weeks in the absence of adjuvant led to a phase like immune response. A plateau ...