Search

Infectious Bursal Disease (IBD) or Gumboro is caused by the IBD virus of the Birnaviridae family. The disease is acute and highly contagious in young birds. The virus infection causes severe damage to the lymphoid organs i.e. bursa Fabricius leading to immunosuppression. The disease morbidity may reach 100%, while the mortality varies from 20 to 100%, causing high economic losses. Infectious Bursal Disease has remained significant threat although vaccination has been applied. This study aimed to determine the current typical pathological changes in the bursa Fabricius of commercial broilers showing IBD symptoms. The samples were obtained from commercial broiler farms in Sragen, Wonogiri, Batang, and Sleman. Gross lesion examination showed enlargement of the bursa Fabricius with gelatinous material on the serosal surface, oedema with fluid accumulation in the lumen, hemorrhages of the serosal surface, atrophy, and caseous exudate in the lumen. Histopathologic changes of acute IBD include hemorrhages, congestion, lymphocyte necrosis, accumulation of fibrin, oedematous and heterophils infiltration in the interfollicular tissues. Microscopic changes in chronic IBD (5-7 days post infection IBDV) including follicular atrophy, lymphocyte necrosis, vacuolization of the follicle, and proliferation of fibroblast and connective tissue in the interfollicular space. In conclusion, the notable pathological change description of bursa Fabricius in suspected acute is gross lesion (swelling and edema, thickened and enlarged plica bursa Fabricius, hemorraghe), microscopic lesion (congestion, hemorraghe, heterophil infiltration) or chronically IBD infection in broiler chicken was gross lesion (atrophy bursa Fabricius, atrophy and excudate casouse in the lumen bursa Fabricius), microscopic lesion (lymphocyte necrosis, vacuolization of bursa Fabricius follicles, proliferation of fibroblasts and interfollicular connective tissue).

Kınalı keklik (Alectoris chukar) ve sülün (Phasianus colchicus)’ün primer lenfoid organlardan bursa Fabricius ve timus dokularının histolojik yönden değerlendirilmesi ve karşılaştırılması amaçlandı. Çalışmada, Süleyman Demirel Üniversitesi Zootekni Bölümü Kanatlı Hayvan Yetiştirme Biriminden 3 adet, sağlıklı kınalı keklik ve sülün temin edildi. Bursa Fabricius ve timus doku örnekleri diseksiyon ile alındı. Genel histolojik incelemeler için hematoksilen-eosin ve masson trikrom boyamaları, doku ve hücrelerdeki nötral mukosubstansı ve karbonhidrat içeriğini belirleyebilmek için periodic acid schiff (PAS) reaksiyonu, plazma hücrelerini belirlemek için methyl green-pyronin boyaması uygulandı. Timusun major hücreleri için Weigert’s hematoksilenli van gieson boyaması gerçekleştirildi. Mast hücrelerini göstermek için ise toludin blue ve alcian blue/safranin O kombinasyon boyama teknikleri yapıldı. Kınalı keklik ve sülün timus ve bursa Fabricius’unun korteks ve medulla bölgelerindeki plazmosit, mastosit ve lenfosit hücrelerinin büyüklüklerinin ölçümleri yapılıp ortalama değerleri hesaplandı. Ayrıca dokuların fotoğrafları Leica DM 500 mikroskobunda çekildi. Kınalı keklik ve sülün bursa Fabricius ve timus dokuları histolojik açıdan karşılaştırıldığında önemli bir farklılığın olmadığı sonucuna varıldı.

Abstak dapat dibaca pada Full Text Abstract can be read at Full Text

The objective of the research was to determine the influences of heat stress and temperature-exposed time on liver malonaldehyde (MDA), relative weight of bursa fabricius and heterophil/lymfocite ratio of broilers. The research used 140 male broilers of 2 weeks of age. The treatments consisted of two factors. The first factor was five treatments: S1A (28.551.53 oC) with ad libitum of feeding, S1BT1 (S1 with pair feeding as S2A), S1BT2 (S1 with pair feeding as S3A), S2A (31.071.29 oC) with ad libitum of feeding and S3A (33.501.17 oC) with ad libitum of feeding. The second factor was five of temperature-exposed times (0, 4, 8, 16, and 32 days after treatments). Variables measured were liver MDA, relative weight of bursa fabricius and ratio of heterophil/lymphocite (H/L). The experiment used a completely randomized design in split plot (5x5), with 4 replications. The result indicated that liver MDA, relative weight of bursa fabricius and H/L ratio of S2 and S3 were higher than those of S1A, S1BT1 and S1BT2. H/L ratio of 4, 8, 16, and 32 days of temperature-exposed times were higher than that of 0 day. It was concluded that heat stress increased the liver MDA and H/L ratio, but decreased the relative weight of bursa fabricius. The temperature-exposed time increased the H/L ratio, but it did not affect the liver MDA and relative weight of bursa fabricius of broilers.

Aim: The aim of this study was postnatal investigation of morphometric features of Bursa fabricius in Turkey by using scanning electron microscope and light microscope. Materials and Methods: One 1-24 week old 50 turkeys (meleagris gallopavo) were used. Their Bursa fabriciuses were taken out after the necropsy and weighted. Tissues were fixed with glutaraldehyde, examined and photographed under scanning electron microscope. For histological examination, tissues were prepared using routine histologic methods and stained with Mallory's triple and Hematoxylen-Eosine. Results: The morphometric data concerning turkey ducklings used in the study showed that Bursa fabricius reaches its maximum size at the 9th week. The decrease in the weight of Bursa fabricius following the week of 9 proved that involution session in the turkey begins after that period. On the investigation performed by means of scanning electron microscopy, dome shaped surface epithelium which covers subepithelial lymph follicles on the surface was determined to be most clear in the 5th and 9th weeks. There was a distinct irregularity of this appearance in the following weeks (13th and 24th). Conclusion: It was concluded that the results may contribute to the researches which relate to humoral immunity formation and effectiveness of vaccination programme.