Morphometric parameters of the intestine and aggregated lymphatic nodules of meat rabbits

Abstract

Nowadays, new breeds of rabbits are appearing with high productivity and rapid growth rate. These breeds require fresh research to be conducted in different fields, which include morphology of the intestine and gut-associated lymphoid tissue (GALT). The morphology of the intestine and GALT of meat rabbits are the investigated objects of the current research. We conducted the investigation on rabbits of different ages (1, 10, 20, 30, 60 and 90 days old). Each age group consisted of five animals. All veterinary ethical requirements were complied with. The body lengths and body masses were measured. Using t-coefficients, we estimated the range of variation of these parameters in each age group. The conclusion about this variation was taken. The masses and lengths of the different intestine parts were investigated as well. Using the obtained values, we provided a continuous numerical model to compute the mass and length of any intestine part of a rabbit of any age in the range from one to 90 days. This allowed us to represent the obtained empirical model by a plot for subsequent detailed study. We found that the changes in masses and lengths do not follow the same pattern for all intestine parts. For some intestine parts, this pattern is approximately linear in the range from one to 90 days; meanwhile for others, the changes in masses and lengths are quite complicated. We observed two local maximas of the growth rate for some intestine parts. Apart from the masses and lengths of the intestine parts, we accomplished macro analysis of the aggregated lymphoid nodules of each age group of animals. We estimated the index of gross area and the law by which it changes in each group. The research results presented here may be used as a basis for composing food ration, assessment of immune status and development of effective prevention and treatment against some diseases.

Pathomorphological changes in the large intestine of rabbits parasitised by Passalurus ambiguus (Nematoda, Oxyuridae)

“…The function of synthesis consists of biosynthesis of vitamins (thiamine (В 1 ), riboflavin (В 2 ), pantothenic (В 3 ) and folic acids (В с ), niacin (РР), biotin (Н), pyridoxine (В 6 ), phyllochinon (К)). But no less important protection is the obligatory microflora of the intestine, which inhibits the development of pathogenic microflora and becomes a natural sorbent by taking part in detoxification of xenobiotics (Mowat, 2003;Vighi et al, 2008;Camps-Bossacoma et al, 2017;Gavrylin & Nikitina, 2017).…”

Analysis of the structural and chemical state of the duplex – system of silicates – silicides of alkaline earth metals. Message 2. Duplex - system SiO2-MgO-CaO : Si-Mg–Ca

“…Теорія будови металургійних розплавів за моделлю гармонійних структур речовини (теорія МГС -фаз, [3]) розглядає рідину як ансамбль різноупорядкованих та різномірних структурних елементів, що складаються з трьох-, двох-, моно-та нульмірних статистичних утворень, стабільних у заданому інтервалі температур [4] .…”

Topography and dynamics of spleen and lymph nodes’ morphometric parameters in rabbits

“…They are characterized by early laying in embryogenesis, almost complete morpho-functional maturity, sufficient for the implementation of definitive functions (proliferation of various lymphocyte clones and immunoglobulin synthesis) before the moment of birth and early age-related involution (Sapin, et al, 2008). Also, one of the main morphogenesis regularities of these organs is a sharp increase in morphometric characteristics, which is accompanied by increased differentiation of lymphoid tissue in the early postnatal period, as the newborn organism enters the relatively sterile conditions of intrauterine development into an environment with many antigens (Gavrylin, 2000;Gavrylin et al, 2017).…”

“…Several publications have been devoted to the study of the morphogenesis patterns of hematopoiesis and lymphopoiesis secondary organs in rabbits during ontogenesis, but they were conducted on wild animals or animals of ordinary breeds (Jeklova et al, 2007;Gavrylin & Nikitina 2017). The peculiarities of the development of these organs in animals of hybrid crosses, which are characterized by the rapid growth of all somatic systems, are insufficiently covered in the scientific literature.…”