Fotossensibilização primária por Chamaecrista serpens (L.) greene em bovinos: relato de caso

Abstract

Photosensitization refers to the sensitivity of the superficial layers of the skin to sunlight due to the presence of photosensitive agents with a specific chemical configuration that absorb certain wavelengths of ultraviolet light. There are three types of photosensitization: primary, congenital, and secondary (hepatogenous). A plant recently associated with cases of photosensitization is Chamaecrista spp. Given the above, the objective of this study is to report cases of photosensitization resulting from intoxication by Chamaecrista serpens (L.) Greene in the state of Alagoas. Two animals were attended in the municipality of Santana do Ipanema, Alagoas. The first animal presented extensive wounds on the back region (bilateral), withers, dorsal portion of the scapular region, and the region near the hock of the left hind limb, while the second animal presented only a small area of hair loss on the withers region, which was hyperemic. A biochemical analysis of liver function was performed, with no significant alterations in enzyme levels. After inspecting the site, a plant was found with compound leaves, several small leaflets, small yellow flowers measuring approximately 1cm, and flattened and cylindrical pods. The plant was identified as Chamaecrista serpens by the botanist. The owner was advised to keep the animals away from the area with the plants. Based on the historical data, clinical findings, serum biochemical results, and the presence of the plant in the pastures where the animals were kept, the diagnosis of primary photosensitization caused by C. serpens was determined.