 |
|
|
|
Year 2000 - Volume 20, Number 3
|
|
Diseases of the central nervous system in cattle of southern Brazil, 20(3):113-118
|
ABSTRACT.- Sanches A.W.D., Langohr I.M., Stigger A.L. & Barros C.S.L. 2000. [Diseases of the central nervous system in cattle of southern Brazil.] Doenças do sistema nervoso central em bovinos no Sul do Brasil. Pesquisa Veterinária Brasileira 20(3):113-118. Depto Patologia, Universidade Federal de Santa Maria, 97105-900 Santa Maria, RS, Brazil. E-mail: cslb@sm.conex.com.br
A retrospective stucly was carriecl out on 6,021 necropsies of cattle performecl over a 36 year periocl in southern Brazil. Of those, 552 (9.16%) presenteei neurological clinical signs anel their necropsy protocols were reviewed to gather information on type of gross and histopathological cliagnosis, etiology, and clinical signs. In 147 cases (26.63% of 552) there were no significant lesions in the central nervous system, in 79 (14.31% of 552) no samples of nervous tissue were submitted to the laboratory anel in 21 (3.81% of 552) the tissues submitted were autolysecl and not suitable for histological diagnosis. Lesions found in the remaining 305 cases were classifiecl as inflammatory, clegenerative, circulatory, congenital, and neoplastic. The inflammatory lesions accounted for the largest category (66.89% of 305 cases). This was further clivicled in lesions causecl by viruses (57.38% of 305 cases) and by bacteria (9.51% of 305 cases). Diseases caused by viruses were rabies (49.51% of 305 cases), necrotizing meningoencephalitis by bovine herpesvirus (4.59% of 305 cases), anel malignant catarrhal fever (3.28% of 305 cases). The clegenerative changes were represented by 74 cases (24.26% of 305 cases) anel incluclecl status spongiosus clue to liver failure inclucecl by Senecio spp poisoning (10.49% of 305 cases) or to the clirect effect of poisoning by Ateleia glazioviana (0.33% of 305 cases); cases of liver failure not associated with morphological changes in the brain (2.95% of 305 cases), myelomalacia clue to corei compression (2.62% of 305 cases), primary neuronal clegeneration associated with So/anum fastigiatum poisoning (2.29% of 305 cases); polioencephalomalacia (1.97% of 305 cases); tetanus (1.31% of 305 cases) and intestinal coccidiosis in calves, ketosis, anel botulism with one case each (0.33% of 305 cases). Circulatory disturbances accounted for 19 cases (6.23% of 305 cases) and incluclecl cerebral babesiosis (5.57% of 305 cases) anel hemorrhages dueto trauma (0.66% of 305 cases). Congenital conclitions represented 2.29% of the 305 cases anel incluclecl cerebelar abiotrophy (two cases) anel one case each of porencephaly, hypomyelinogenesis, clemyelination, hydrocephalus, and cerebellar malformation. Only one neuroectodermal neoplasm (0.33% of 305 cases) was found in this series. |
| |
|
|
| |
|
|
