Myopia development in humans depends on a complex interplay between genetic and environmental factors. Many of those who become myopic when exposed to a myopigenic environment are likely to do so because of a genetic susceptibility, whereas others somehow remain immune. In the most intensively studied model of environmentally induced myopia, form-deprivation myopia in the chick, there is convin...

In commercial poultry husbandry practice, the hatchery takes over the incubation of bird eggs in order to provide as many day-old chicks as needed at any time to farmers. The main bottleneck for poultry industry development in Togo is the lack of day-old chick supply. Indeed, there is no proficient hatchery which can cover the needs of the farmers because of lack of information about hatchery m...

Contamination and penetration of salmonellae into hatching eggs may comprise an important link in the transmission of these bacteria to growing birds, processed carcasses, and eventually to the consumer. In this study, a predictive model for Salmonella typhimurium as a function of initial cell number and storage or incubation time at a nearly constant temperature and humidity was developed and ...

15 1. It has been reported that the increasing CO2 tension triggers the embryo to pip the air cell and 16 emerge from the egg. However, the mechanism by which higher CO2 concentrations during the 17 last few days of incubation affect chick physiology and the hatching process is unclear. This study 18 investigates the effect of CO2 concentrations up to 1% during pipping, on the onset and length ...

objective(s): this study aimed to find out whether the chick cardiomyocyte micromass (mm) system could be employed to predict the teratogenecity of common environmental factors. different multivitamins and over the counter drugs were used in this study.   materials and methods: white leghorn 5-day-old embryo hearts were dissected and trypsinized to produce a cardiomyocyte cell suspension in dul...

Abstract The addition probiotics brings several benefit including protect the environment by reducing ammonia gas. This research aims to evaluate as a substitute for AGP on carcass percentage and physical quality of broiler’s meat. experiment used 300 Lohmann broilers day old chick (DOC) is divided into 3 groups treatment 5 replications in each during 35 days. experimental design was Completely...

This study was conducted to evaluate growth performance, brooding and rearing mortalities of F2 main reciprocal backcross progenies Abor Acre broiler breeder x native chicken crosses compare their F1 progenies. The base population used in the consisted mature (~ 48 weeks) male female chickens exotic (Abor Acre) parent stock. varieties were made up normal feather, naked neck frizzle genotypes. T...

Two experiments were conducted to evaluate effects of strain [five in Experiment (Exp.) 1 and six in Exp. 2)] and age (29, 47, and 57 wk in Exp. 1 and 29, 41, and 52 wk in Exp. 2) of commercial broiler breeders on incubation time and chick weight. Highly significant differences in egg weight were found among strains in both Exp. After adjusting for effects of egg weight, significant effects of ...