Journals / Veteriner Bilimleri Dergisi . Eurasian Journal of Veterinary Sciences / 2003 / Cilt: 19 - Sayı: 3-4

The histological studies in spleen and bursa of Fabricius of hormonally thymectomised chickens

Hormonal timektomi oluşturulan civcivlerin dalak ve bursa Fabricilerii'leri üzerinde histolojik çalışmalar

Pages
103–111
Publication Date
2022-11-03
DOI
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AI Summary & Key Takeaways

AI Insight
⚡ TL;DR(Too Long; Didn't Read)

Bursa Fabricii of HCA-treatment group displayed quite similar with those of the controls, at subsequent periods of the experiment.

📌 3 Key Takeaways

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Objective & Hypothesis:In this study, the effect of hormonal thymectomy induced by hydrocortisone acetate (HCA) administration at post hatching period on the spleen and bursa of Fabricius of chickens was investigated ligth microscopically.
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Key Findings & Data:For these purpose, 200 chickens from Avian Bred were used as materials.
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Conclusion & Impact:Bursa Fabricii of HCA-treatment group displayed quite similar with those of the controls, at subsequent periods of the experiment.
🔬Design:Research Article
📍Scope:Comprehensive Sample
⚙️Variables:Domain Parameters

Abstract

In this study, the effect of hormonal thymectomy induced by hydrocortisone acetate (HCA) administration at post hatching period on the spleen and bursa of Fabricius of chickens was investigated ligth microscopically. For these purpose, 200 chickens from Avian Bred were used as materials. While 100 chickens served as a controls, 100 chickens were hormonally thymectomized by subcutaneous hydrocortisone acetate administration at one week old. At 2, 4, 6 days following the HCA treatment, it was demonstrated that spleens reduced the size, the frequency of lymphocyte decreased and germinal centers disappeared. In these periods, alpha-naphthyl acetate esterase (ANAE) positive lymphocytes found in pe- riarteriolar lymphatic sheath in the control group, but theANAE-positive cells were not observed in the HCA treated group. By the 3rd week following the HCA treatment, ANAE pozitive lymphocytes were rarely seen in the periarteriolar lymphatic sheath in comparison with control group. After wards, the spleens of HCA-treated animals had quite similar histology with those of the controls. At the 2, 4, 6 days following the HCA treatment, bursa of Fabricii of the animals were displayed advanced atrophy, the cortical region of lymphoid follicles was almost disappeared/cystic structures were observed in the centres of lymphoid follicles. In these periods, a number of ANAE positive lymphocytes were found in the medullar regions of lymphoid follicles and few ANAE positive lymphocytes found under the follicle associated epithelium (FAE), whereas in the HCA-treated animals the cells did not appear beneath the FAE. Bursa Fabricii of HCA-treatment group displayed quite similar with those of the controls, at subsequent periods of the experiment.

Özet

Bu çalışmada, kuluçkadan çıkıştan sonra hidrokortizon asetat verilerek hormonal timektomi uygulanan civcivlerin dalak ve bursa Fabricii'lerinde oluşan histolojik değişiklikler ışık mikroskopik düzeyde incelendi. Bu amaçla 200 adet Avian ırkı civciv materyal olarak kullanıldı. Bu hayvanların yarısında kuluçkadan çıkışın 7. gününde hidrokortizon asetat (HCA) verilmek suretiyle hormonal timektomi gerçekleştirilirken diğer yarısı kontrol grubu olarak kullanıldı. HCA uygulamasından 2, 4 ve 6 gün sonra yapılan histolojik incelemelerde dalağın atrofik olduğu, organdaki lenfosit yoğunluğunun azaldığı ve lenf foliküllerinin germinal merkezlerinin şekillenmemiş olduğu dikkati çekti. Kontrol grubundaki hayvanların arteriya sentral islerin i saran periarteriyoier lenfoid kılıfta (PALS) gözlenen alfa-naftil asetat esteraz (ANAE) pozitif lenfositler, HCA uygulanan gruplarda rastlanmadı. HCA uygulamasını takibeden 3. haftadan itibaren deneme grubunun PALS'larında da tek tük ANAE pozitif lenfositler gözlendi. Takibeden dönemlerde, deney grubunda dalağın histolojik özelliklerinin kontrollerinkine büyük benzerlik gösterdiği dikkati çekti. HCA uygulamasından 2, 4 ve 6 gün sonra yapılan incelemelerde bursa Fabricii'nin atrofik olduğu, organdaki lenf foliküllerinin korteks bölgelerinin ortadan kalktığı ve medulla bölgelerinde ise yaygın kistik yapıların şekillenmiş olduğu görüldü. Timektomiyi takibeden 2, 4, ve 6. günlerde kontrol grubu bursa Fabricii örneklerindeki lenf fliküllerinin medullalarında sıklıkla, folikül ilişkili epitel (FAE) altında ise seyrek olarak rastlanan ANAE pozitif lenfositler HCA uygulananlarda gözlenmedi. Takibeden dönemlerde ise, HCA uygulanan grupta bursa Fabricii'nin kontrol grubundakiyle benzer histolojik özelliklere sahip olduğu tespit edildi.

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Cite This Article

SANDIKÇI, M. (2022). The histological studies in spleen and bursa of Fabricius of hormonally thymectomised chickens. Veteriner Bilimleri Dergisi . Eurasian Journal of Veterinary Sciences, Cilt: 19 - Sayı: 3-4, 103–111. https://ajindex.com/articles/646253

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