Morphometric and Histochemical Features of the Harderian Gland in Rabbits with Different Types of Autonomous Regulation

Tybinka, A M; Zakrevska, M. V.; Shchebentovska, O.

doi:10.2478/macvetrev-2022-0024

Cited by 2 publications

(2 citation statements)

References 35 publications

(29 reference statements)

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“…Lamont (2018), the lymphoid tissue of the gland is understudied, although it is important in local immunity. The Harderian gland has aroused and still arouses interest in the scientific community due to its morphofunctional and phylogenetic characterisation (Santillo et al, 2020;Tybinka et al, 2022). Summarising the results of the studies, it can be noted that the nature of morphological, histological, and morphometric changes in the Harderian gland of chickens in the postvaccination period is most pronounced at 50 and 75 days of age.…”

Section: Figure 5 the Microscopic Structure Of The Harderian Gland Of...mentioning

confidence: 98%

Histoarchitectonics of the Harderian gland of chickens in the post-vaccination period

Budnik¹,

Гуральська²,

Pinsky³

et al. 2022

Scientific Horizons

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Understanding the effect of vaccination on the body of chickens is impossible without exploring the morphology of the immune defence organs. The purpose of the study was to identify morphological changes in the Harderian gland of the Haysex Brown chickens aged 1, 15, 25, 50, 75, 100 and 120 days under the influence of vaccination. The following methods were used in the study: anatomical, histological, light-optical, morphometric, and statistical. Histological preparations of the Harderian gland of chickens of different ages (1, 15, 25, 50, 75, 100 and 120 days) of the vaccinated and unvaccinated groups were analysed. The features of the organ structure, its lymphoid structures and their types of forms were explored on histological preparations of the chicken Harderian gland. According to histological studies, it was established that this is a complex tubular lobular gland, which consists of secretory lobules with ducts. The interlobular connective tissue contains a significant number of lymphocytes, plasma cells, and other cells. In vaccinated chickens at 25 days of age, the presence of diffuse lymphoid tissue was noted, which was not observed in the control group, and at 50 days of age - the development of a nodular form of lymphoid tissue, the maximum number of which was observed at 100 days of age. In chickens of 75, 100, and 120 days of the age of the experimental group, the amount of lymphoid tissue in the Harderian gland increased, which was noted in the interlobular connective tissue and secretory lobules. It has been proven that the chicken gland, as a peripheral organ of immune defence, is developed at 50 days of age in both the control and vaccinated groups. The study of morphological changes in the Harderian gland of the poultry of different ages is an important tool for the development of preventive vaccination protocols in modern poultry farming. The results of the study should be considered when improving the technology of rearing and exploitation of chickens to ensure high vitality and, accordingly, productivity

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Section: Figure 5 the Microscopic Structure Of The Harderian Gland Of...mentioning

confidence: 98%

Histoarchitectonics of the Harderian gland of chickens in the post-vaccination period

Budnik¹,

Гуральська²,

Pinsky³

et al. 2022

Scientific Horizons

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“…Під час онтогенетичного розвитку встановлюються індивідуальні особливості сукупного автономного тонусу та формується певний тип автономної регуляції. Він проявляється у морфо-функціональних пристосуваннях усіх структур організму, що перебувають під контролем автономної нервової системи (Shah et al, 2010;Kjaer & Jorgensen, 2011;Tybinka et al, 2022). Завдяки цьому налагоджуються міжорганні та міжсистемні взаємодії, що формують місцевий та загальний гомеостаз (Taylor et al, 2014).…”

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Influence of autonomous regulation type on the connective tissue content in the muscular membrane of the chickens’ small intestine

Tybinka

2024

SMLNUVMB

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The relationship between the small intestine's muscular membrane structure of chickens and the autonomous regulation type was investigated. Based on electrocardiographic and variational pulsometric studies, adult laying hens of the Isa-Brown breed were divided into two groups: sympathotonic (ST) and sympatho-normotonic (ST-NT). The volume of individual layers and the entire muscle membrane, as well as the volume of connective tissue fibers located in it, was determined in the small intestine of the hens. In general, the relationship between morphological parameters and the autonomous regulation type is similar throughout the whole intestine, but it has certain peculiarities in different intestine parts. An increase in the volume of both the circumferential and longitudinal layers of the intestinal muscular membrane accompanies an increase in sympathetic tonus. This pattern is typical for both groups. The ratio between these layers varies along the intestinal wall: the share of the longitudinal layer increases while that of the circumferential layer decreases. Accordingly, the average volume of the entire small intestine's muscular membrane in ST and ST-NT chickens differs by 590.6 mm3, and the total volume by 1771.7 mm3. Increased sympathetic tonus also contributes to a more significant number of collagen fibers in the circular layer of the muscle membrane. In the average values of the small intestine, its superiority over the longitudinal layer is 5.6 % in ST chickens and 3.4 % in ST-NT chickens. Regarding absolute values of elastic fiber volume, no group of birds has a complete advantage along the small intestine. However, the average values of this section are still dominated by ST chickens, which outnumber the other group by 15.3 mm3 in the circumferential layer and by 11.7 mm3 in the longitudinal layer of the muscle membrane. Birds with persistent sympathotonia also have more collagen fibers per 1 mm3 muscle membrane. Regarding average small intestine parameters, ST-NT chickens demonstrate a lower value (0.005 mm3). However, regarding the number of elastic fibers alone, ST-NT chickens already occupy a dominant position, and the difference between the two groups decreases to 0.004 mm3. The established muscle membrane's morphological features indicate its plasticity in adapting the intestinal wall to the autonomous regulation peculiarities.

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Morphometric and Histochemical Features of the Harderian Gland in Rabbits with Different Types of Autonomous Regulation

Cited by 2 publications

References 35 publications

Histoarchitectonics of the Harderian gland of chickens in the post-vaccination period

Histoarchitectonics of the Harderian gland of chickens in the post-vaccination period

Influence of autonomous regulation type on the connective tissue content in the muscular membrane of the chickens’ small intestine

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