Influence of Pasteurella multocida and High and Low Environmental Temperatures on Adrenals and Bursa of Fabricius in Turkeys

Publisher Website
Google Scholar
Abstract
The morphologic changes in the adrenals and bursa of Fabricius were evaluated from turkeys inoculated with P. multocida either in the palatine air spaces or via drinking water and maintained at high (33.4-37.4.degree. C), low (2.6-5.3.degree. C) and moderate (19.8-22.4.degree. C) temperatures in temperature-controlled chambers. There was a slight hyperplasia of the adrenal cortical cells and a hypertrophy of the nuclei in the uninoculated turkeys maintained at both high and low temperatures; the changes were more marked in turkeys maintained at low temperatures. Regardless of the temperature to which the turkeys were exposed, there was an increase in adrenal weight, hyperplasia of the cortical cells, hypertrophy of the nuclei of the cortical cells and depletion of lipid in the cortical cells in the turkeys that became depressed after inoculation with P. multocida. Uninoculated turkeys exposed to high temperatures showed a reduction in the weight of the bursa of Fabricius, atrophy of the follicles and a reduction in the number of lymphocytes within the follicle, which did not occur in the bursae from uninoculated turkeys maintained at low temperatures. Turkeys inoculated with P. multocida showed a marked reduction in bursal weight, atrophy of the follicles and reduction in the number of lymphocytes within the follicles.

This publication has 0 references indexed in Scilit: