When possible, allow all surfaces to dry thoroughly prior to reuse. Dryness helps prevent the reproduction, spread and transport of disease organisms. Although a surface is clean, it is more easily recontaminated with organisms if water remains on the surface. A listing of important characteristics for the more commonly used disinfectants used by the poultry industry is shown in General Characteristics of Disinfectants . It is important when selecting the best disinfectant to consider its effect upon the developing embryo and the hatchery environment.
Embryos are in a very sensitive stage of development when the eggs enter the hatchery.
They can be severely affected if subjected to chemical vapors, even if a sterile environment is provided. It must be remembered that an egg is not produced in a sterile environment. Before it is laid, the egg is subjected to a series of microbial attacks that can reduce the embryo's potential to develop into a healthy, robust chick. The vent of the hen is probably the most contaminated area that an egg passes through. Poorly maintained nests can also distribute organisms to noninfected eggs.