Serological studies on sera of egg-laying fowls

Egg-laying.

C. elegans hermaphrodites are self-fertile, and their rate and temporal pattern of egg-laying are modulated by diverse environmental cues. Egg-laying behavior has served as an important phenotypic assay for the genetic dissection of neuronal signal transduction mechanisms. This chapter reviews our current understanding of the neuronal and neurochemical mechanisms underlying the control of egg-l...

Effects of laying hens housing system on laying performance, egg quality characteristics, and egg microbial contamination

The objective of this study was to compare the performance, egg quality, and microbial contamination of egg shells from hens maintained in different housing systems, such as conventional and enriched cages, litter, and aviaries. The housing system significantly (P < 0.001) influenced the performance characteristics. The highest egg production, lowest daily feed consumption, and feed conversion ...

On Cross Reactions of Egg Albumin Sera

Experiments are presented on the cross reactions of hen egg albumin immune sera with egg albumins of other species by means of exhaustion with heterologous proteins and by inhibition tests. From the results it can be concluded that the sera contain multiple, qualitatively distinct antibodies. For this, two not mutually exclusive explanations come into consideration: the presence in proteins of ...

Growth and Reproduction in Fowls in the Absence of Carotinoids and the Physiological Relation of Yellow Pigmentation to Egg Laying.

Immunological Studies with the Virus of Infectious Laryngotracheitis of Fowls Using the Developing Egg Technique

(1) The technique of chorioallantoic membrane inoculation has been applied to the study of the virus of infectious laryngotracheitis as it occurs amongst Australian poultry. (2) When suitably diluted suspensions of virus are inoculated, isolated foci or pocks appear whose macroscopic form and histological structure is characteristic. The numbers of these foci may be used as a measure of the amo...