Results 221 to 230 of about 12,187 (252)

Ontogenic restriction of colonization of the bursa of Fabricius [PDF]

open access: possibleEuropean Journal of Immunology, 1983
AbstractThe capacity of hemopoietic precursor cells (HPC) to home to embryonic bursal and thymic grafts was investigated in embryonic and newly hatched chickens. Whereas thymic grafts developed normal histogenesis in both types of recipients, the bursal rudiment was colonized and developed in embryonic, but not in newly hatched hosts.
Juvaj Ivanyi   +2 more
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Cryptosporidiosis of the Bursa of Fabricius of Chickens

Avian Diseases, 1975
Light-microscope and electron-microscope studies of a coccidial organism found in the bursa of Fabricius from 3 chickens clearly established the parasite as belonging to the family Cryptosporiidae. Hyperplasia and heterophil infiltration were associated with the presence of organisms attached to the microvillus border of epithelial cells lining the ...
J. F. Munnell   +2 more
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Vasculogenesis of the bursa cloacalis (bursa of Fabricius) of the chick embryo

Journal of Morphology, 1981
AbstractVasculogenesis of the bursa cloacalis (bursa of Fabricius) was examined in 10‐ to 21‐day chick embryos and in chicks during the first 5 days post‐hatching. The entire circulatory system was injected with India ink, and the bursae were then removed and either cleared for examination in toto or sectioned serially.
Ray L. Watterson   +3 more
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Lymphocyte-Differentiating Hormone of Bursa of Fabricius

Science, 1976
Induction of early lymphocyte differentiation was studied in vitro in fractionated bone marrow cells of newly hatched chickens, with alloantiserums to identify newly differentiated B cells (Bu-1 + ) and T cells (Th-1 + ).
Douglas G. Gilmour   +2 more
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Secretory cell in the medulla of the bursa of Fabricius

Experientia, 1978
Light microscopy has revealed a possible secretory cell in the medulla of the bursa of Fabricius. Cyclophosphamide increased the presence of the secretory cell.
Bruce Glick, I. Olah
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Uptake of environmental antigens by the bursa of Fabricius

Nature, 1975
THE bursa of Fabricius of birds has an essential role as a central lymphoid organ for the differentiation of B lymphocytes1,2. In addition, the bursa harbours immunocompetent B cells3 which are capable of local antibody production. Haemolytic plaque-forming cells have been observed in the bursa after introducing sheep red blood cells (SRBC) into the ...
Tapani Sorvari   +4 more
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On the development of the lymphoid follicles of the bursa of fabricius

The Anatomical Record, 1975
AbstractThe structural features of the development of the bursa of Fabricius in white Leghom chick embryos are depicted at carefully timed intervals during embryogenesis, with emphasis on the sequence of events between the ninth and twelfth days of incubation.
Robert C. Murphy   +2 more
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Experimental studies on the development of the bursa of Fabricius

Developmental Biology, 1966
Abstract An analysis of the origin of lymphoid cells in the developing bursa of Fabricius has been made using a chromosome marker technique in combination with various experimental procedures including parabiosis of embryos of similar major histocompatibility type, twin embryo studies, transplantation of bursal rudiments to the chorioallantois, and ...
Malcolm A.S. Moore, J.J.T. Owen
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Follicular exclusion of retroviruses in the bursa of fabricius

Virology, 1989
To gain insight into the regulation of retroviral infection at the cellular level, we analyzed the distribution of retroviral antigen and nucleic acid in the bursa of Fabricius of the parents and progeny of two highly inbred lines of chickens, one resistant and the other susceptible to infection. Line 15I5 chickens and line 7(2), which are C/C and C/A,
Donald L. Ewert   +2 more
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The Bursa of Fabricius

2015
Student and successor of Andreas Vesalius (Fig. 3.1) and Gabriel Fallopius (Fig. 3.2), Girolamo Fabrici or Fabrizio (Fig. 3.3), was professor of Surgery at the University of Padova, Italy, from 1565 to 1613, and practiced and taught Anatomy (Smith et al. 2004). In 1594, he built the first permanent theatre ever designed for public anatomical dissection
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