Dome epithelium and follicle-associated basal lamina pores in the avian bursa of fabricius

1995 ◽  
Vol 241 (2) ◽  
pp. 155-162 ◽  
Author(s):  
W. D. Davenport ◽  
E. R. Allen
Keyword(s):  
Basal Lamina ◽  
Bursa Of Fabricius

scholarly journals Identification of cells secreting a thymostimulin-like substance and examination of some histoenzymatic pathways in aging avian primary lymphatic organs: II. Bursa of Fabricius

10.4081/843 ◽  
2009 ◽  
Vol 47 (4) ◽  
pp. 325
Author(s):  
AM Mazzone ◽  
M Aita ◽  
F Gabrielli ◽  
E Moriconi ◽  
D De Orsi
Keyword(s):  
Positive Reaction ◽  
Basal Lamina ◽  
Physiological Activity ◽  
Histochemical Staining ◽  
Enzymatic Activities ◽  
Bursa Of Fabricius ◽  
White Leghorn ◽  
Old Adult ◽  
Lymphatic Organs

The Bursa of Fabricius of 15 day, 1-, 3-, and 6 month-old adult chickens (White Leghorn strain) were studied by histological and histochemical staining, histoenzymatic reactions (LDH, SDH, a-GPDH, NAD, NADPH, Ca++-dependent ATP-ase, pH 8.5) and by anti-thymostimulin immunoreaction. Positive reactions for mucopolysaccharides and enzymatic activities were located in the epithelia of the follicles, i.e. in follicleassociated- epithelium (FAE), inter-follicle-epithelium (IFE) and in different epithelial compartments of cortical and medullary zones. Positive reaction for thymostimulin-like (TSlike) substance was restricted to FAE cells and weakly to the basal lamina of IFE. In 6-month-old chickens, the FAE cells disappeared; the phenomenon of bursal regression was evident, although not all the follicles were involved. In the few still normal follicles, the good reactivity to the enzymes tested suggests that residual physiological activity is still present, even if reduced.

Induction and Differentiation of Dental Epithelium in Vivo and in Vitro

1982 ◽  
Vol 40 ◽  
pp. 142-145
Author(s):  
E. J. Kollar
Keyword(s):  
Connective Tissue ◽  
Oral Mucosa ◽  
Basal Lamina ◽  
Functional Derivatives ◽  
Specific Source ◽  
Dental Epithelium ◽  
Connective Tissue Stroma

The differentiation and maintenance of many specialized epithelial structures are dependent on the underlying connective tissue stroma and on an intact basal lamina. These requirements are especially stringent in the development and maintenance of the skin and oral mucosa. The keratinization patterns of thin or thick cornified layers as well as the appearance of specialized functional derivatives such as hair and teeth can be correlated with the specific source of stroma which supports these differentiated expressions.

Pathology of the thymus, spleen and bursa of Fabricius in zinc-deficient ducklings

2003 ◽  
Vol 32 (3) ◽  
pp. 257-000 ◽  
Author(s):  
Hengmin Cui ◽  
Fang Jing ◽  
Peng Xi
Keyword(s):  
Bursa Of Fabricius

Ultrastructure of the basal lamina of bovine ovarian follicles and its relationship to the membrana granulosa

Reproduction ◽  
2000 ◽  
pp. 221-228 ◽  
Author(s):  
HF Irving-Rodgers ◽  
RJ Rodgers
Keyword(s):  
Basal Lamina ◽  
Granulosa Cells ◽  
Light And Electron Microscopy ◽  
Single Layer ◽  
Antral Follicle ◽  
Basal Cells ◽  
Preantral Follicles ◽  
Antral Follicles ◽  
Cellular Processes ◽  
Innermost Layer

Different morphological phenotypes of follicular basal lamina and of membrana granulosa have been observed. Ten preantral follicles (< 0. 1 mm), and 17 healthy and six atretic antral follicles (0.5-12 mm in diameter) were processed for light and electron microscopy to investigate the relationship the between follicular basal lamina and membrana granulosa. Within each antral follicle, the shape of the basal cells of the membrana granulosa was uniform, and either rounded or columnar. There were equal proportions of follicles </= 4 mm in diameter with columnar basal cells and with rounded basal cells. Larger follicles had only rounded basal cells. Conventional basal laminae of a single layer adjacent to the basal granulosa cells were observed in healthy follicles at the preantral and antral stages. However, at the preantral stage, the conventional types of basal lamina were enlarged or even partially laminated. A second type of basal lamina, described as 'loopy', occurred in about half the preantral follicles and in half the antral follicles </= 4 mm diameter. 'Loopy' basal laminae were not observed in larger follicles. 'Loopy' basal laminae were composed of basal laminae aligning the basal surface of basal granulosa cells, but with additional layers or loops often branching from the innermost layer. Each loop was usually < 1 microm long and had vesicles (20-30 nm) attached to the inner aspect. Basal cellular processes were also common, and vesicles could be seen budding off from these processes. In antral follicles, conventional basal laminae occurred in follicles with rounded basal granulosa cells. Other follicles with columnar cells, and atretic follicles, had the 'loopy' basal lamina phenotype. Thus, follicles have different basal laminae that relate to the morphology of the membrana granulosa.

Intestinal digestibility of selected minerals, growth performance and meat quality in turkeys fed diets supplemented with different sources and levels of zinc

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Kamil Otowski ◽  
Aleksandra Drażbo ◽  
Katarzyna Ognik ◽  
Krzysztof Kozłowski
Keyword(s):  
Growth Performance ◽  
Meat Quality ◽  
Redox Status ◽  
Bursa Of Fabricius ◽  
Breast Meat ◽  
Zn Addition ◽  
Inclusion Level ◽  
Dietary Treatments ◽  
Different Sources ◽  
Intestinal Digestibility

AbstractThe aim of this study was to determine whether dietary supplementation with zinc oxide nanoparticales (NP-ZnO) as a substitute for the conventional ZnO affects the intestinal digestibility of selected minerals, growth performance and meat quality in turkeys. The replacement of ZnO with NP-ZnO had no effect on the intestinal digestibility of Zn, Cu, Fe and Ca, whereas the lowest dose of supplemental Zn reduced Zn digestibility. The applied inclusion levels and sources of Zn had no effect on the growth performance (except the feed intake) of turkeys, including liveability. No differences in the relative weights of the heart, spleen and bursa of Fabricius (except the liver), or the weights of the femur and tibia were found between the dietary treatments. Neither the dose nor the source of supplemental Zn influenced carcass dressing percentage or the share of breast, thigh and drumstick muscles in the carcass. In comparison with the highest and moderate doses of Zn, the lowest inclusion level of Zn contributed to increased yellowness of breast meat (P=0.005). The analyzed doses and sources of supplemental Zn exerted varied effects on the redox status of fresh and frozen breast meat. In conclusion, the growth performance of turkeys, carcass yield and composition as well as the redox status of fresh and frozen breast meat were generally similar, regardless of the dietary source and level of Zn. The beneficial effect of Zn addition at 100 mg/kg was improved Zn and Ca digestibility, and increased redness of breast meat.

Immunomodulatory Effect of Andrographis paniculata during Lead Induced Toxicity in Broilers

2016 ◽  
Vol 12 (2) ◽  
Author(s):  
R. S. Ingole ◽  
A. S. Chandewar ◽  
M. V. Joshi ◽  
Madhuri Hedau ◽  
S W Hajare ◽  
...  
Keyword(s):  
Lead Acetate ◽  
Lead Toxicity ◽  
Andrographis Paniculata ◽  
Immunomodulatory Effect ◽  
Bursa Of Fabricius ◽  
Control Group ◽  
Skin Thickness ◽  
Broiler Chicks ◽  
Commercial Diet ◽  
Ameliorative Effect

The effect of dietary lead exposure on immunomodulation of broilers and possible ameliorative effect of Andrographis paniculata were studied. One hundred broiler chicks were randomly divided into five equal groups of 20 each. Group T0 served as control while group T1, T2, T3 and T4 birds were provided commercial diet with lead acetate at the dose of 300 ppm in feed. Powder of dry leaves of Andrographis paniculata was mixed in the feed of group T2, T3 and T4 chicks at the dose of 2 gm, 3 gm and 4 gm/kg of feed respectively and fed for 4 weeks. Significant decrease in HI titres in T1 group and significant increase in T4 group suggested increased haemagglutination titre (HI) response. The maximum skin thickness and diameter on 24th and 48th hours was observed in control group birds (T0) and was comparable with T4 group. Microscopically spleen, thymus and bursa of fabricius revealed increase in lymphoid population in birds fed lead acetate along with Andrographis paniculata compared to T1 group. We concluded that Andrographis paniculata has immunomodulatory effect during lead toxicity in broilers.

scholarly journals Investigation of Lethal Concurrent Outbreak of Chlamydiosis and Pigeon Circovirus in a Zoo

Animals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1654
Author(s):  
Wei-Tao Chen ◽  
Chin-Ann Teng ◽  
Cheng-Hsin Shih ◽  
Wei-Hsiang Huang ◽  
Yi-Fan Jiang ◽  
...  
Keyword(s):  
Disease Outbreaks ◽  
Chlamydia Psittaci ◽  
Bursa Of Fabricius ◽  
Chain Reactions ◽  
Renal Epithelium ◽  
Polymerase Chain Reactions ◽  
Transmission Electron ◽  
Intracytoplasmic Inclusion Bodies ◽  
Polymerase Chain ◽  
Streptopelia Orientalis

During the spring, an outbreak of sudden death involving 58 birds occurred in a zoo. Histopathological examinations revealed variable numbers of intracytoplasmic basophilic microorganisms in the macrophages, hepatocytes, and renal epithelium of most birds, along with occasional botryoid intracytoplasmic inclusion bodies within histiocytes in the bursa of Fabricius. Based on the results of histopathological examinations, immunohistochemical staining, transmission electron microscopy, and polymerase chain reactions, genotype B Chlamydia psittaci infection concurrent with pigeon circovirus (PiCV) was diagnosed. A retrospective survey, including two years before the outbreak and the outbreak year, of C. psittaci and PiCV infections of dead birds in the aviaries, revealed that the outbreak was an independent episode. The findings of this study indicate that concurrent infection with C. psittaci and PiCV might lead to lethal outbreaks of chlamydiosis, particularly Streptopelia orientalis. In addition, persistently monitoring both pathogens and identifying potential PiCV carriers or transmitters might also help prevent lethal disease outbreaks.

Analysis of miRNA and mRNA reveals core interaction networks and pathways of dexamethasone-induced immunosuppression in chicken bursa of Fabricius

2021 ◽  
Vol 134 ◽  
pp. 34-47
Author(s):  
Aru Su ◽  
Yujie Guo ◽  
Huihui Tian ◽  
Yanting Zhou ◽  
Wenting Li ◽  
...  
Keyword(s):  
Interaction Networks ◽  
Bursa Of Fabricius
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