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Gut-associated lymphoid tissue in the large intestine of calves. II. Electron microscopy.
- Source :
-
Veterinary pathology [Vet Pathol] 1988 Nov; Vol. 25 (6), pp. 509-15. - Publication Year :
- 1988
-
Abstract
- Scanning electron microscopy of lymphoid tissue in the large intestine of three germfree calves (age 3, 6, and 7 days) revealed two different units: propria nodules and lymphoglandular complexes (LGC). Propria nodules had lymphoid tissue predominantly in lamina propria and were covered by distinct follicle-associated epithelium which lacked goblet cells; nodules were surrounded by wide crypts, which were also lined by follicle-associated epithelium towards the luminal side. Lymphoglandular complexes had lymphoid follicles in the tunica submucosa; epithelial diverticulae extended through the muscularis mucosae branching into the lymphoid nodule. In centers of lymphoglandular complexes, protrusions of lymphoid tissue were covered with distinct follicle-associated epithelium. By transmission electron microscopy cells compatible with M cells in the small intestine of calves and cells with characteristics of both enteroabsorptive and M cells were found. Follicle-associated epithelium of propria nodules and lymphoglandular complexes differed only in the relative frequency of cell types.
Details
- Language :
- English
- ISSN :
- 0300-9858
- Volume :
- 25
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Veterinary pathology
- Publication Type :
- Academic Journal
- Accession number :
- 3212895
- Full Text :
- https://doi.org/10.1177/030098588802500615