Plantas fotossensibilizantes para ruminantes e equídeos.

Abstract

The objective of this thesis is to promote the knowledge about photosensitization caused by toxic plants, highlighting the action of Froelichia humboldtiana, for the scientific community and the part of the society involved with the creation of production animals in the Brazilian semi-arid region. For this purpose, the study of natural outbreaks was reported, it was made data collection with owners and veterinarians who had previously attended the affected animals, in addition the cases were monitored with clinical and laboratory evaluation. This thesis was elaborated in three chapters, referring to the same number of original scientific articles sent to national journals, according to the norms of the Postgraduate Program in Veterinary Medicine of the Federal University of Campina Grande (PPGMV / UFCG). The first article is published in the journal Semina (qualis CAPES B1), and the second article was published in the Brasilian Journal of Veterinary Research (qualis CAPES A2) and the third article is waiting for the reviewer's reply in the same journal. Chapter I is referent to an article entitled “Plants that cause photosensitization in ruminants in Brazil”. After the elaboration of this review it was possible to determine some mechanisms of action, the clinical signs, the pathology and the toxic principles of the plants that cause photosensitization in ruminants. In addition, it was sought to clarify, in a succinct and objective way, the diagnostic methods and the prophylaxis of plant-induced photosensitization. The second chapter concerns an outbreak of photosensitization in equidae in the region of Assú, Rio Grande do Norte, Brazil, due to the ingestion of F. humboldtiana. In this article, entitled “Outbreaks of primary photosensitization in equidae caused by Froelichia humboldtiana”, it is possible to conclude that F. humboldtiana is an important cause of primary photosensitization in equidae in the Brazilian semiarid region, resulting in fragility and death of a large number of animals, especially asinos who do not receive adequate treatment. In the third chapter, whose corresponding article is entitled “Primary photosensitization in dairy cattle caused by Froelichia humboldtiana”, another outbreak of primary photosensitization by F. humboldtiana is described, but affecting dairy cattle. In this outbreak a large number of animals affected by Froelichia humboldtiana are described. Intoxication caused a significant drop in dairy production. However, the lack of symptomatic symptoms compatible with photodermatitis in lactating calves most be highlighted.