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Jejunal (JPPs) and ileocaecal (IPP) Peyer's patches in lambs were studied by employing the indirect and the avidin-biotin-peroxidase methods, using antibodies to sheep IgM and thymocytes. Thymocyte sera absorbed with IPP germinal centre cells showed specificity for T cells in the thymus, lymph nodes and Peyer's patches. Whereas JPPs had large interfollicular T cell areas, IPP mainly contained B cells, although small triangular T cell areas were found at the apex of the follicles. Some T cells were also found in the dome and corona region of JPPs and IPP. While germinal centres of JPPs had about 40 per cent of IgM-positive cells, IPP germinal centres contained about 80 per cent of such cells. Negative or weak IgM-positive cells were seen in the peripheral zone of IPP germinal centres, contrasting with surface IgM-positive cells in the central zone, and indicating a centripetal migration of maturing lymphocytes.
H J Larsen, and
T Landsverk
November 1989,
Immunology,
H J Larsen, and
T Landsverk
January 1987,
Histochemistry,
H J Larsen, and
T Landsverk
January 1985,
Advances in experimental medicine and biology,
H J Larsen, and
T Landsverk
January 1976,
Allergologia et immunopathologia,
H J Larsen, and
T Landsverk
January 1987,
Current topics in microbiology and immunology,
H J Larsen, and
T Landsverk
June 1986,
The Anatomical record,
H J Larsen, and
T Landsverk
November 2015,
Veterinary world,
H J Larsen, and
T Landsverk
May 1981,
Research in veterinary science,
H J Larsen, and
T Landsverk
June 1987,
Brain, behavior, and immunity,
H J Larsen, and
T Landsverk
April 1977,
Experientia,
