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The clinical signs and pathology of the central nervous system in 9 horses with naturally occurring neurologic disease due to Trypanosoma evansi are described. The clinical course was 2 to 20 days; clinical signs included marked ataxia, blindness, head tilt and circling, hyperexcitability, obtundity, proprioceptive deficits, head pressing, and paddling(More)
In the current study, mycotoxicoses of ruminants and horses are reviewed, with an emphasis on the occurrence of these diseases in South America. The main mycotoxicoses observed in grazing cattle include intoxications by indole-diterpenoid mycotoxins (Paspalum spp. contaminated by Claviceps paspali, Lolium perenne infected by Neotyphodium lolii, Cynodon(More)
In southern Brazil, cattle are affected by a disease known locally as Lechiguana and characterized by large subcutaneous swellings. Eighteen cases were examined clinically; 17 of the cattle had a single swelling, and one had two swellings. In 14 of the 18 cases, the swellings were located over the scapula and adjacent regions. The subcutaneous masses(More)
A bovine cerebellar disorder of recurrent seizures characterized by loss of equilibrium, extension of the head and thoracic limbs, opisthotonus, nystagmus and falling to the side or backwards is described from 16 farms in the Brazilian state of Rio Grande do Sul. The main pathologic features were vacuolation, degeneration and loss of Purkinje cells with(More)
The oomycete Pythium insidiosum is the pathogenic cause of pythiosis, a life-threatening disease that affects several animal species. Canines are the second most affected species, and the disease is characterized by the development of cutaneous and gastrointestinal lesions. While concomitant cutaneous and gastrointestinal lesions are rarely found in the(More)
Twenty-one cases of pythiosis in horses (n = 10), dogs (n = 9) and cattle (n = 2) were investigated. The aetiology in all cases was confirmed by immunohistochemistry. Data related to the clinical course and outcome and localization of the lesions were obtained from pathology reports. The equine lesions consisted of fibrotic tissue with multiple, often(More)
This study was carried out to investigate the pattern of lectin binding in the cerebellum of calves poisoned with Solanum fastigiatum var. fastigiatum. For the experimental reproduction of the illness, S. fastigiatum var. fastigiatum was collected from farms where the intoxication occurs. The dried ground plant was administered to two 1-year-old cattle by a(More)
Tetrapterys spp. have been reported as a cause of cardiac fibrosis, status spongiosus of the nervous system, and abortion. To study the intoxication by Tetrapterys multiglandulosa, 24 sheep were divided into 4 experimental groups of 4 sheep each and 1 control group. Groups 1 to 3, respectively, received 1, 1.5, and 3 g/kg body weight of the dry plant daily,(More)