Histological and Immunohistochemistry Studies of Trachea Calcification in the Laying Hens (Gallus gallusdomesticus)

The aim of this study is to detect calcification of trachea and determination its appearance in different age of groups of laying hens. Using special dyes to detect deposits of calcium salts as well as using immunohistochemistry method, showing that the calcification in upper part of trachea does not appear at the age of 6 months, while in the lower part of which appeared simple calcification in the form of small foci. With age progress, the calcification of the hyaline cartilage of the trachea appears as foci with varying size carrying within them dark color calcium deposits. The calcified foci become occupy the large size of tracheal rings and degeneration and death of cartilaginous cells with appear in other somewhere of tracheal rings.