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首页> 外文期刊>Indian Journal of Poultry Science >Steriological analysis of tissue compartments of the thymus of Giriraja birds (Gallus domesticus)
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Steriological analysis of tissue compartments of the thymus of Giriraja birds (Gallus domesticus)

机译：Giriraja鸟类（Gallus domesticus）胸腺组织区室的形态学分析

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Morphometric changes in the thymus of various age groups such as posthatch, mature, involutary and recrudescent stages were studied in giriraja strain of chicken. The posthatch changes could be classified as maximum proportion of body weight of thymus, equal volume density of thymic cortex and medulla, high mitotic index and high corticomedullary ratio of thymic follicles. During the mature phase the volume density of medulla was higher while cortical thickness and corticomedullary ratio were low. Involutary phase was characterized by low proportions of thymic weight, maximum capsular thickness, high volume densities of medulla and stroma, lowest corticomedullary ratio and drastic drop in mitotic index. Recrudescence was characterized by maximum thymic weight and a drastic increase in volume density of thymic cortex from a near zero value at involutary phase. A noteworthy fact was that the corticomedullary ratio increased twice after involution which may be due to the effect of breeding cycle. Maximum diameter of follicles was noted at 20 weeks. During terminal involutary phase, decreased proportional weight of thymus, increased values of volume densities of stroma and medulla, decreased follicular diameters, irregular capsular thickness and mitotic index of cortical changes were noted in the immediate post hatch and recrudescence period while the medullary expansions were predominant at the start of involuntary phase. These changes should be known and differentiated from experimental effects while studying steriology of the thymus.
机译：在鸡的吉拉拉贾（Giriraja）品系中研究了不同年龄组的胸腺的形态变化，例如孵化后，成熟，渐生和再发阶段。孵化后的变化可归类为胸腺的最大重量比例，胸腺皮质和延髓的等体积密度，胸腺卵泡的高有丝分裂指数和高皮质髓质比。在成熟阶段，髓质的体积密度较高，而皮质厚度和皮质髓质比率较低。不孕期的特征是胸腺重量的比例低，最大的荚膜厚度，髓质和基质的体积密度高，最低的皮质髓质比和有丝分裂指数的急剧下降。再发的特征在于最大的胸腺重量和胸腺皮质的体积密度从不育期的接近零值急剧增加。值得注意的事实是，在内翻后皮质肾小球体比率增加了两倍，这可能是由于繁殖周期的影响。在20周时观察到最大卵泡直径。在晚期渐生阶段，在孵化后和再生期立即发现胸腺的比例重量减少，基质和髓质的体积密度值增加，卵泡直径降低，囊膜厚度不规则和皮层变化的有丝分裂指数，而髓质扩张占主导在非自愿阶段开始时。在研究胸腺的立体学时，这些变化应该是已知的，并应与实验效果区分开。

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