Objective: Fungal agents cause disease in virtually any susceptible hosts. In the poultry production and medicine, pathogens were eliminated from a line of a breeder by injection of antifungals into hatching eggs. There is little information available describing the safety of the antifungal drugs on the birds embryonated eggs. The objective of this study was to investigate the efficiency of the...

Infectious agents cause disease in virtually any susceptible hosts. In the poultry production and medicine, pathogens were eliminated from a line of a breeder by injection of antibiotics into hatching eggs. There is little information available describing the safety of the folate antimetabolite/sulfonamide class of antibiotics on the game birds embryonated eggs. The objective of this study was ...

Biological impacts of climate change are exemplified by shifts in phenology. As the timing of breeding advances, the within-season relationships between timing of breeding and reproductive traits may change and cause long-term changes in the population mean value of reproductive traits. We investigated long-term changes in the timing of breeding and within-season patterns of clutch size, egg vo...

Water-soluble proteins, mainly livetins (a-, /?-, y-), are present in hen egg yolk (Martin, Vandegaer & Cook, 1957). They represent 5% of fresh yolk solids (Saito, Martin & Cook, 1965). During the later stages of incubation the watersoluble proteins (water-soluble fraction, WSF) undergo a marked increase in relative proportion; after 15 days of incubation they form over 15% and at 18 days over ...

objective: fungal agents cause disease in virtually any susceptible hosts. in the poultry production and medicine, pathogens were eliminated from a line of a breeder by injection of antifungals into hatching eggs. there is little information available describing the safety of the antifungal drugs on the birds embryonated eggs. the objective of this study was to investigate the efficiency of the...

Bacterial culturing of eggs for Salmonella enteritidis has become an important tool in efforts to identify laying flocks that potentially threaten public health. As pools of egg contents are generally incubated before culturing to allow S. enteritidis numbers to multiply to easily detectable levels, any differences in the multiplication of S. enteritidis strains in egg pools could result in sim...

A simple model to describe the relationship between the temperature of the developing embryo, incubator temperature, embryo heat production, and thermal conductivity of the egg and surrounding air is presented. During early incubation, embryo temperature is slightly lower than incubator temperature because of evaporative cooling. However, from midincubation onwards, metabolic heat production fr...

This research investigate the role of light flashes as environmental stimuli during different incubation periods in improving the embryonic development and hatch performance of Rhode Island Red chicken eggs. A total number of 900 hatching eggs were incubated using 1 of 5 light flashes regimens as follows: The first group (control, C) was incubated under dark conditions throughout the whole incu...