Histopathological Study of the Lymphoid Organs in Different Species of Egyptian Rats
Abdel-Hakim Saad, Rewaida A. Abdel-Gaber, and Hanaa M. Mahmoud
Zoology Department, Faculty of Science, Cairo University, Cairo, Egypt
Abstract: The development of lymphoid organs depends on the correct expression of several molecules within a defined timeframe during ontogeny. Although this is an extremely complex process, with each secondary lymphoid tissue requiring subtly different signals, a common framework for lymphoid development is beginning to emerge. So, we selected three species of the most common Egyptian rats,Arvicanthis niloticus, Microtus agrestis and Acomys cahirinus to determine whether or not there are interspecific differences in their lymph nodes. The possibility of interspecific differences is important because the selected species represent three significantly different size categories (small, represented byM. agrestis, moderate represented by A. cahirinus, and large represented by A. niloticus) with presumably different diets and different physiologic strategies. Also, the random variations of the lymph node number within species of A. niloticus, M. agrestis and A. cahirinus were noted. These individual variations are remarkable in the posterior cervical, brachial, internal jugular and axillary lymph groups.
[Abdel-Hakim Saad, Rewaida A. Abdel-Gaber, and Hanaa M. Mahmoud. Histopathological Study of the Lymphoid Organs in Different Species of Egyptian Rats. J Am Sci 2013;9(3):93-105]. (ISSN: 1545-1003).http://www.jofamericanscience.org. 13
Keywords: Arvicanthis niloticus - Microtus agrestis - Acomys cahirinus - Lymphocyte. Full Text 13