Clumps of chromatin in the spinal cord of 2- to 10-day-old pigs with congenital tremor were of no diagnostic value since they were present also in unaffected pigs of the same age. No differences in shape, size, number, location, and staining characteristics of the clumps were found. The clumps were thought to be evidence of cellular necrobiosis. The cords of pigs with tremor had distinctly less myelin than those of normal pigs.
References
1.
CammermeyerJ.:
The life history of the microglial cell: a light microscopic study; in
Ehrenpreis and Solnitzky Neurosciences research,
vol. 3,
pp. 44–121
(Academic Press,
New York1970)
2.
FletcherT. F.:
Ablation and histopathologic studies on myoclonic congenita in swine.Am. J. vet. Res.29:
2255–2262(1968)
3.
HumasonG. L.:
Animal tissue techniques,
p. 294
(Freeman,
San Francisco1962)
4.
LunaL. G. (ed.):
Manual of histologic staining methods of the Armed Forces Institute of Pathology;
3rd ed.
(McGraw-Hill,
New York1968)
5.
StrombergM. W.:
Myoclonia congenita; in Dunne Diseases of swine;
3rd ed.,
pp. 878–881
(Iowa State University Press,
Ames1970)
6.
StrombergM. W.GustafsonD. P.:
Pathological findings in mature and newborn myoclonic pigs.
Proc. Symp. on Factors Producing Embryonic and Fetal Abnormalities, Death, and Abortion in Swine, ARS, 91–73,
pp. 68–78(1969)
