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Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages

This study was conducted with the aim of defining the ultrastructure of bronchial lymphoid aggregates and lymphoid nodules of the bronchus-associated lymphoid tissue (BALT) in 3-, 6- and 8-month-old calves. A total of 9 calves divided into 3 age groups of 3 calves in each group was used in this stud...

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Main Authors: Abu Bakar @ Zakaria, Md Zuki, Saw, Po Po, Saad, Mohd Zamri
Format: Article
Language:English
Published: Veterinary Association Malaysia 2009
Online Access:http://psasir.upm.edu.my/id/eprint/17508/1/Ultrastructural%20evaluation%20of%20bronchial%20lymphoid%20aggregates%20and%20lymphoid%20nodules%20in%20calves%20at%20different%20ages.pdf
http://psasir.upm.edu.my/id/eprint/17508/
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spelling my.upm.eprints.175082016-11-18T09:28:58Z http://psasir.upm.edu.my/id/eprint/17508/ Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages Abu Bakar @ Zakaria, Md Zuki Saw, Po Po Saad, Mohd Zamri This study was conducted with the aim of defining the ultrastructure of bronchial lymphoid aggregates and lymphoid nodules of the bronchus-associated lymphoid tissue (BALT) in 3-, 6- and 8-month-old calves. A total of 9 calves divided into 3 age groups of 3 calves in each group was used in this study. Samples of the lungs were taken systematically and processed for scanning electron microscopic (SEM) and transmission electron microscopic (TEM) examinations. The results revealed differences between the epithelium of lymphoid aggregates and lymphoid nodules. SEM showed the absence of cilia over the lymphoid nodules but not over aggregates. Flattened, non-ciliated epithelial cells which may be precursors of the M cells were found in lymphoepithelium (LPE) of 3-month-old calves over nodules. The non-ciliated epithelial cells over nodules in 6- and 8-month-old calves were columnar in bronchi, but in bronchioles they were cuboidal. However, in the 3-month-old calves, some were columnar and some flattened in bronchi and in bronchiole, they were cuboidal. Transmission electron microscopic examination showed the presence of two types of M cells found in the LPE. Type 2 M cells were found in 3- and 6-month-old calves while type I M cells predominated in the bronchi in 6- and 8-monthold calves. This work represents the first systematic investigation of the similarities and differences in the ultrastructure of lymphoid aggregates and lymphoid nodules in calves and changes therein as a function of age. Veterinary Association Malaysia 2009 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/17508/1/Ultrastructural%20evaluation%20of%20bronchial%20lymphoid%20aggregates%20and%20lymphoid%20nodules%20in%20calves%20at%20different%20ages.pdf Abu Bakar @ Zakaria, Md Zuki and Saw, Po Po and Saad, Mohd Zamri (2009) Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages. Jurnal Veterinar Malaysia, 21 (1). pp. 1-8. ISSN 9128-2506
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description This study was conducted with the aim of defining the ultrastructure of bronchial lymphoid aggregates and lymphoid nodules of the bronchus-associated lymphoid tissue (BALT) in 3-, 6- and 8-month-old calves. A total of 9 calves divided into 3 age groups of 3 calves in each group was used in this study. Samples of the lungs were taken systematically and processed for scanning electron microscopic (SEM) and transmission electron microscopic (TEM) examinations. The results revealed differences between the epithelium of lymphoid aggregates and lymphoid nodules. SEM showed the absence of cilia over the lymphoid nodules but not over aggregates. Flattened, non-ciliated epithelial cells which may be precursors of the M cells were found in lymphoepithelium (LPE) of 3-month-old calves over nodules. The non-ciliated epithelial cells over nodules in 6- and 8-month-old calves were columnar in bronchi, but in bronchioles they were cuboidal. However, in the 3-month-old calves, some were columnar and some flattened in bronchi and in bronchiole, they were cuboidal. Transmission electron microscopic examination showed the presence of two types of M cells found in the LPE. Type 2 M cells were found in 3- and 6-month-old calves while type I M cells predominated in the bronchi in 6- and 8-monthold calves. This work represents the first systematic investigation of the similarities and differences in the ultrastructure of lymphoid aggregates and lymphoid nodules in calves and changes therein as a function of age.
format Article
author Abu Bakar @ Zakaria, Md Zuki
Saw, Po Po
Saad, Mohd Zamri
spellingShingle Abu Bakar @ Zakaria, Md Zuki
Saw, Po Po
Saad, Mohd Zamri
Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages
author_facet Abu Bakar @ Zakaria, Md Zuki
Saw, Po Po
Saad, Mohd Zamri
author_sort Abu Bakar @ Zakaria, Md Zuki
title Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages
title_short Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages
title_full Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages
title_fullStr Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages
title_full_unstemmed Ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages
title_sort ultrastructural evaluation of bronchial lymphoid aggregates and lymphoid nodules in calves at different ages
publisher Veterinary Association Malaysia
publishDate 2009
url http://psasir.upm.edu.my/id/eprint/17508/1/Ultrastructural%20evaluation%20of%20bronchial%20lymphoid%20aggregates%20and%20lymphoid%20nodules%20in%20calves%20at%20different%20ages.pdf
http://psasir.upm.edu.my/id/eprint/17508/
_version_ 1643826538755391488
score 13.211869

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