Anatomical and histological changes in the spleen of post hatching indigenous chicken in Iraq

Rabab Adnan Hamza

doi:10.30539/iraqijvm.v41i2.68

Abstract

The structure of the indigenous chickens spleen during the post-hatching period was determined by gross and light microscopical examination by using Hematoxylin and eosin and Massons Trichrome staining techniques. At one day old chicks the spleen was rounded in shape, pink in color. At two weeks old chicks the spleen was triangular in shape. At the progress of the aged the color of spleen became red-brown. In all ages the spleen consisted of white pulp and red pulp which were fused together. The spleen was encapsulated by thin connective tissue capsule contain few smooth muscles, the trabiculi were rare and thin. The red pulp consisted of venous sinuses surrounded by lymphatic cords. The white pulp consisted of peri-artery lymphoid sheath, peri-venous lymphoid sheath, peri ellipsoid lymphoid sheath, and Lymphatic follicles. The appearance of these elements was age dependant. At the first week of age the peri-artery lymphoid sheath and peri-venous lymphoid sheath were developed. At the third week, the peri ellipsoid lymphoid sheath, Lymphatic follicles were noticed and the plasma cells were scattered in the white pulp in addition to the lymphocytes. At one month of age, the germinal center appeared in some lymphatic follicle. The present study revealed that the spleen was well developed lymphatic organ at the age of three weeks.

Highlights

Introduction surrounded by lymphatic cordsThe whiteThe spleen is lymphatic organ of avian immune system, and its importance in disease resistance [1]
The spleen in general is large hemal lymph node concerned with blood filtration and blood reservoir in addition to its main role in immunity; in avian, spleen act as blood storage (spleen storage of pulp appeared as islands enclosed by red pulp and there was no distinct marginal zone between the red and white pulp [5]
At [2,3] weeks old and older chicks the spleen was pale brown in color, triangular in shape, the two lateral sides were flat, the free surface was curved. This shape was constant with age, the color of the spleen changed, it appeared dark red- brown at [1,2] month old chickens (Fig.2)

Summary

Introduction

Introduction surrounded by lymphatic cordsThe whiteThe spleen is lymphatic organ of avian immune system, and its importance in disease resistance [1]. At [2,3] weeks old and older chicks the spleen was pale brown in color, triangular in shape, the two lateral sides were flat, the free surface was curved. This shape was constant with age, the color of the spleen changed, it appeared dark red- brown at [1,2] month old chickens (Fig.2).

Results

Conclusion