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Lymphoid Tissues in the Digestive Tract of Deshi Chicken (gallus Domesticus) in Bangladesh

M.L Rahman
Chittagong Government Veterinary College, Chittagong, Bangladesh.

M. R. Islam
Department of Anatomy and Histology, Bangladesh Agriculturl University, Mymensigh, Bangladesh.

M. Masuduzzaman
Chittagong Government Veterinary College, Chittagong, Bangladesh.

M. Z. I. Khan
Department of Anatomy and Histology, Bangladesh Agriculturl University, Mymensigh, Bangladesh.

Abstract/ Executive Summary:

The different parts of digestice system of one- day old, 30 days, 90 days and 180 days old deshi chickens were taken in fresh state and stained with hematoxylin and eosin (H and E). The aim of this study was to investigate the distribution of lymphocytes in the different histological layers of the digestive tract of deshi chicken at the different ages of postnatal growth and development. In the present study the Intraepithelial Lymphocytes (IELs) were not abundant in the upper segments of the digestive tract (oesophagus, crop, proventriculus and gizzard), however these immunocompetent cells were abundantly found in the distal part of the digestive tract (duodenum, jejunum, Meckel's diverticulum, ileum, cecal tonsil and colorectum) The population of IELs in the distal part of the tract were found higher from day 90 to day 180 of postnatal period of development, however in the jejunum, caecum and caeacal tonsil the frequency were found abundant at day old ages only. The lamina propria of the different segments of digestive tract contain isolatory and diffuse lymphocytes. In addition to these isolatory lymphatic nodules and aggregated lymphatic nodules were present and there were higher in frequency at day 90 at day 180 of postnatal ages. The lymphocytes were also distributed scatteredly in the submucosa and tunica muscularis in all the stages of development. These results suggest that the development of the population of lymphocytes in the postnatal period vary with the different segment of the digestive tract concerned and aging of chicken of Bangladesh.

Keywords: Lymphoid tissues, Postnatal, IELS, LPLs, Deshi chicken

Location: Departmental poultry house of Bangladesh Agricultural University

Start Date:

End Date:

Program Area: Animal Health and Management

Commodity: Chicken

Objectives:

To analyze the presence and distribution of intraepithelial lymphocytes (IEL_S), lamina proprial lymphocytes (LPL_s) and the presence fo lymphocytes in other histological layers in the digestive tract of deshi chicken potentially.

Methodology:

One-day old male and female deshi chickens (locaI breed) (Gallus domesticus) were reared in the departmental poultry house of Bangladesh Agricultural University with food and drinking water ad libitum. Hygienic care was also taken to protect the chickens from diseases. A total of 16 chickens, four chickens from each group of one day old, 30 days, 90 days and 180 days were killed with cervical subluxation after proper anesthesia. Food and water were withheld 2 hrs before killing. The oesophagus, crop, proventriculus, gizzard, duodenum, jejunum, Meckel's diverticulum, ileum, caecum, cecal tonsil and colorectum which were free from gross pathological changes, were obtained and processed in the laboratory to study the distribution of lymphocytes in the digestive tract of chicken and effect of age on it. The tissues were first fixed in the Bouin's fluid and then dehydrated in the graded alcohol, cleared in the xylene, embedded in paraffin and finally the sections were cut at 6 µ thickness using rotatory microtome. The section were stained finally following standard Hematoxylin and Eosin (H and E) method for the studies of the distribution of lymphoid tissues.

Source of Information: Pakistan Journal of Biological Sciences 6 (13): 1145-1150 ,2013 ISSN 1028-8880

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The results suggested that the development of the population of lymphocytes in the postnatal period vary with the different segment of the digestive tract concerned and aging of chicken of Bangladesh.

Knowledge Management: Journal