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ON USE OF SIZE OF THE BURSA OF FABRICIUS AS AN INDEX OF AGE AND DEVELOPMENT For bursa and gonad dimensions, I measured length and width using dial calipers and I measured wing lengths by centimeter ruler. Chronological study of bursa involution in each species must be made before the size of the bursa of Fabricius is used to quantify specimen age. The bursa of Fabricius ("bursa") is a dorsal diverticulum of the cloaca, has a lympho-epithelial origin, and functions as an early immunosup- pressive organ (Glick 1983). elibrary.unm.edu /sora/JFO/v061n04/p0441-p0444.html   (2187 words)

Perinatal Deletion of B Cells Expressing Surface Ig Molecules That Lack V(D)J-Encoded Determinants in the Bursa of ... The bursa of Fabricius is the primary lymphoid organ responsible the lymphoid follicles of the bursa (33, 34, 35, 36). Because bursal follicles in the embryonic bursa are oligoclonal, www.jimmunol.org /cgi/content/full/164/10/5041   (5678 words)

CRANIAL PNEUMATIZATION PATTERNS AND BURSA OF FABRICIUS IN NORTH AMERICAN SHOREBIRDS The cloaca of each bird was excised and measurements (mm) were taken of the length (A) and height (B) of the fresh bursa of Fabricius; both measurements were used in the approximation of the size of the organ (AB). The measurements of the average size of the bursa (-'), as shown in Table 1, indicate that the size of this structure diminishes from July to November. SUMMARY The involution of the bursa of Fabricius begins in the autumn and is fully achieved by the end of the winter in all studied species. elibrary.unm.edu /sora/Wilson/v084n03/p0329-p0339.html   (3758 words)

Infectious Bursal Disease The bursa of Fabricius is the main organ affected. Hemorrhages are prominent in the pectoral and thigh muscles and in the bursa of Fabricius. The bursa of Fabricius is taken and PCR is conducted. www.canadianpoultry.ca /new_page_2.htm   (2099 words)

Manual of standards for diagnostic tests and vaccines, 4th edition, 2000 In birds that die at the peak of the disease outbreak, the bursa is enlarged and turgid with a pale yellow discoloration. Remove the bursae of Fabricius aseptically from approximately five affected chickens in the early stages of the disease. The presence of lesions in the bursae of susceptible chickens along with the absence of lesions in immune chickens is diagnostic for IBD. www.oie.int /eng/normes/mmanual/ancien_manuel/A_00087.htm   (6020 words)

[No title]   (Site not responding. Last check: 2007-11-03) The bursa of Fabricius is an organ involved in antibody synthesis in young birds, but regresses before sexual maturity. The size of the bursa of Fabricius decreased during the first year of life in house sparrows. There was a positive relationship between relative volume of bursa of Fabricius and the number of fault bars on feathers, which is a measure of body condition. www.zoo.ufl.edu /rkimball/mollerHSabs.html   (216 words)

Role of Nr13 in regulation of programmed cell death in the bursa of Fabricius -- Lee et al. 13 (6): 718 -- Genes and ... Apoptotic cell death is developmentally regulated in the chicken bursa of Fabricius. Bursas from newly hatched chickens were dissected and dispersed. Genetic instability and apoptotic cell death during neoplastic progression of v-myc-initiated B-cell lymphomas in the bursa of Fabricius. www.genesdev.org /cgi/content/full/13/6/718   (5400 words)

Wingwise:The Avian Immune System Primary tissues are the thymus, located in the neck along the jugular vein, and the bursa of Fabricius, located adjacent to the cloaca. Although school is open in the bursa for six weeks, it is the first three that are considered the most critical.² School closes down after six weeks and what diversity has been achieved is what the bird will have for its lifetime. The bursa does continue to play a role in the immune system through the life of the bird, though not as critical a one as it does in the beginning. www.wingwise.com /immune.htm   (736 words)

Faculty Information for Paul Neiman The principal experimental system exploited is the bursa of Fabricius in chickens. Neiman PE, Thomas SJ, Loring G. Induction of apoptosis during normal and neoplastic B-cell development in the bursa of Fabricius. Analysis of gene expression during myc oncogene-induced lymphomagenesis in the bursa of Fabricius. depts.washington.edu /mcb/facultyinfo.php?id=115   (662 words)

LI ET AL., June 2001   (Site not responding. Last check: 2007-11-03) Body weight and relative weights of spleen and bursa of Fabricius of the two lines were also compared. In addition, the F line had greater BW, relative weight of spleen, and ratio of spleen to bursa of Fabricius weight (P < 0.01) but had a lower relative weight of bursa of Fabricius at 9 wk of age. Based on the present results, it is suggested that long-term selection for increased 16-wk BW might have resulted in changes in the immune system, as indicated by changes in the relative weights of the spleen and bursa of Fabricius and phagocytic activity. www.poultryscience.org /psa/toc/abs/01/Jun01ab689.html   (289 words)

ARS | Publication request: Ovoinhibitor in the Chicken Bursa of Fabricius: Identification, Isolation, and Localization   (Site not responding. Last check: 2007-11-03) These data suggest that the bursal secretory dendritic cell may be a previously unreported source of ovoinhibitor, and that ovoinhibitor may be used in the development of antibody producing cells. By obtaining a better understanding of the function of ovoinhibitor in the bursa of Fabricius, we may gain a better understand of the development of antibody producing cells in birds. These data suggest that the gene for ovoinhibitor is expressed in the bursa of Fabricius and that the bursal secretory dendritic cell may be a previously unreported source of ovoinhibitor. www.ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=152786&pf=1   (427 words)

Profile Its bursal expression is low during embryogenesis and increases dramatically with spontaneous apoptosis in the post-hatching bursa. We found that mutation of c-myb in early bursal precursors is associated both a with smaller transcriptional change than that associated with c-myc and with several different phenptypes: clonal differentiating bursal follicles, small neoplastic bursal follicles and short-latency rapidly growing lymphomas - all with distinct global patterns of transcription. Neiman P E, Retrovirus-induced B cell neoplasia in the bursa of Fabricius. myprofile.cos.com /NEIMAN1   (1394 words)

bursa of fabricius - OneLook Dictionary Search bursa of Fabricius : The American Heritage® Dictionary of the English Language [home, info] Bursa of Fabricius : The On-line Medical Dictionary [home, info] Bursa of Fabricius : Science and Biotechnology [home, info] www.onelook.com /?w=bursa+of+fabricius   (151 words)

Origin of Hemopoietic Stem Cells in Embryonic Bursa of Fabricius and Bone Marrow Studied through Interspecific Chimeras ... Origin of Hemopoietic Stem Cells in Embryonic Bursa of Fabricius and Bone Marrow Studied through Interspecific Chimeras -- Douarin et al. The histogenesis of the bursa of Fabricius and of bone marrow was studied by a biological cell marking technique based on differences in the nuclear structure of two species of birds, Japanese quail (Coturnix coturnix japonica) and chick (Gallus gallus). By grafting bursal rudiments and limb buds of quail into chick and inversely it was possible to demonstrate that the whole hemopoietic population of the bursa of Fabricius and of bone marrow is derived from blood-borne extrinsic stem cells. www.pnas.org /cgi/content/abstract/72/7/2701   (502 words)

Chicken B cells undergo discrete developmental changes in surface carbohydrate structure that appear to play a role in ... migrate through the vasculature to the bursa of Fabricius. Fabricius, B cell progenitors are induced to undergo a developmental switch home to the bursa of Fabricius upon transplantation. dev.biologists.org /cgi/content/abstract/121/6/1657   (390 words)

Bursa   (Site not responding. Last check: 2007-11-03) In birds, B cells mature in the Bursa of Fabricius which is embryologically and morphologically similar to the thymus. The mammalian functional equivalent of the Bursa is the bone marrow. Since the antigens the immature B cell would be likely to see are those that are always in circulation; i.e., normal self antigens, this is a way to prevent development of B cells which can attack self tissues. www6.ufrgs.br /favet/imunovet/immuno/ch5/bursa.htm   (321 words)

Selection for B cells with productive IgL gene rearrangements occurs in the bursa of Fabricius during chicken embryonic ... Selection for B cells with productive IgL gene rearrangements occurs in the bursa of Fabricius during chicken embryonic development -- McCormack et al. within the bursa of Fabricius at successively later stages of development. Development of B cells expressing surface immunoglobulin molecules that lack V(D)J-encoded determinants in the avian embryo bursa of Fabricius www.genesdev.org /cgi/content/abstract/3/6/838   (601 words)

Lymphocytic depletion of bursa of Fabricius and thymus in chickens inoculated with Escherichia coli -- Nakamura et al. ... Lymphocytic depletion of bursa of Fabricius and thymus in chickens inoculated with Escherichia coli -- Nakamura et al. Lymphocytic depletion of bursa of Fabricius and thymus in chickens inoculated with Escherichia coli At 14 days after inoculation, both bursa and thymus had normal www.vetpathology.org /cgi/content/abstract/23/6/712   (276 words)

Definition of bursa of Fabricius - Merriam-Webster Online Dictionary   (Site not responding. Last check: 2007-11-03) Etymology: Johan C. Fabricius died 1808 Danish entomologist For More Information on "bursa of Fabricius" go to Britannica.com Get the Top 10 Search Results for "bursa of Fabricius" www.m-w.com /cgi-bin/dictionary?va=Fabricius   (109 words)

Progesterone receptor in the chick bursa of fabricius: characterization and immunohistochemical localization -- Ylikomi ... Progesterone receptor in the chick bursa of fabricius: characterization and immunohistochemical localization -- Ylikomi et al. Progesterone receptor in the chick bursa of fabricius: characterization and immunohistochemical localization A high affinity progesterone-binding site was studied in the chick bursa of endo.endojournals.org /cgi/content/abstract/117/1/155   (215 words)

MSN Encarta - Dictionary - bursa of Fabricius MSN Encarta - Dictionary - bursa of Fabricius Click here to search all of MSN Encarta Search for "bursa of Fabricius" in all of MSN Encarta encarta.msn.com /dictionary_1861686882/bursa_of_Fabricius.html   (76 words)

Energy Citations Database (ECD) - Energy and Energy-Related Bibliographic Citations Energy Citations Database (ECD) Document #4433480 - MAMMALIAN EQUIVALENT OF THE AVIAN BURSA OF FABRICIUS. Availability information may be found in the Availability, Publisher, Research Organization, Resource Relation and/or Author (affiliation information) fields and/or via the "Full-text Availability" link. MAMMALIAN EQUIVALENT OF THE AVIAN BURSA OF FABRICIUS. www.osti.gov /energycitations/product.biblio.jsp?osti_id=4433480   (90 words)

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