Intoxicação crônica por Pteridium arachnoideum em bovinos no nordeste do estado do Rio Grande do Sul, Brasil.

Pteridium spp., commonly known as fern, is commonly found in acidic, sandy and low fertility soils. Poisoning occurs when animals go through food deprivation or accidental ingestion. The objective of this study is to report the occurrence of two cases of chronic intoxication in cattle in the northeast region of the state of Rio Grande do Sul, Brazil. Both cases had clinical signs of dysphagia, halitosis, salivation and the presence of tumors in the oropharynx. Low supply and quality of forage, overcrowding of pasture areas, inadequate pasture management, presence of Pteridium arachnoideum, clinical signs, necropsy and histopathological of lesions confirmed the diagnosis of chronic intoxication. [ABSTRACT FROM AUTHOR]