This study aimed to evaluate the effect of dietary ochratoxin, in the presence or absence of aluminosilicate, on the histology of the bursa of Fabricius, liver and kidneys, and on the humoral immune response of broilers vaccinated against Newcastle disease virus. The exposure of birds to 2 p.p.m. ochratoxin, in the presence or absence of aluminosilicate, reduced their humoral immune response an...

The avian bursa of Fabricius represents a site for the generation of antibody diversity. Transfer of neonatal bursal cells into cyclophosphamide-treated neonatal chickens results in reconstitution of recipient bursae with donor-derived bursal stem cells. These stem cells express cell surface IgM and, under conditions of limiting donor bursal stem cell numbers, each reconstituted bursal follicle...

s of papers 3 7 Non-MHC alloantigen genes affecting immunity. W. E. Briles*, Northern Illinois University, DeKalb, IL 60115. An alloantigen is a genetically determined cell-surface molecule detected by specific antisera. An identifying letter has been assigned to each genetic locus responsible for the eleven distinct families of alloantigens A, C, D, E, H, I, J, K, L, P, and R. The genes of eac...

Trials were conducted to determine whether differential resistance to challenge with Staphylococcus aureus was characteristic of two related lines of New Hampshire chickens differing genetically in size of the bursa of Fabricius. Neonatal small bursa line (SBL) chicks were superior to the unselected Lester J. Dreesen (LJD) line in five of six trials employing intracardiac challenge (chi 2 = 6.3...

The thymus (T)-and bursa (BF)-dependent areas of the duck lymph node were histologically examined by means of chemical bursectomy using cyclophosphamide-treatment , surgical thymectomy, and/or X-ray irradiation. The T-dependent area was represented by the deep area of lymphatic nodules comprised of small lymphocytes. The BF-dependent one was represented by lymphatic cords consisting of small an...

s of papers 3 7 Non-MHC alloantigen genes affecting immunity. W. E. Briles*, Northern Illinois University, DeKalb, IL 60115. An alloantigen is a genetically determined cell-surface molecule detected by specific antisera. An identifying letter has been assigned to each genetic locus responsible for the eleven distinct families of alloantigens A, C, D, E, H, I, J, K, L, P, and R. The genes of eac...

This study was carried out to determine the influence of vit. E with selenium, poultry star, levamezol and acetic acid on immune response to infections bursal disease in broiler fed diet with aflatoxin-contaminated aflatoxin poisons. 200 one-day old chicks were divided randomly into six equal groups, All groups (except 6 group) were fed diet with aflatoxincontaminated feed (from 1 to 40 days ol...

This experiment was conducted to evaluate the effects of ochratoxin A (OTA) on the function and histology of the liver, kidney and bursa of broiler chickens fed OTA contaminated rations. Two hundred forty one-day-old male Ross broiler chicks were used, they were randomly divided into 3 dietary experimental groups of 80 birds and given rations containing 0 (control), 400 or 800 μg OTA/Kg feed. T...

The effect of cyclephosphamide (Cy) on the thymus and the bursa of Fabricius in chickens, aged one day to 7 weeks, was examined morphologically, Chiekens, which were daily injected i.m. with 6mg Cy 1, 2, or 3 times from the hatching day, were compared with saline coutrel chickens, The relative weights of both the thymus and the bursa decreased abruptly just after the injection of Cy. The weight...