Absorption of Excess Selenium and Sulfur by Plants and Animals

This document discussed the absorption and accumulation of selenium (Se) and sulfur (S) in plants and their subsequent toxicity to animals, particularly in areas affected by western coal mining. Selenium in plants was metabolized into non-protein forms or selenomethionine, which is readily absorbed by animals, leading to acute and chronic selenosis. Symptoms of chronic selenosis included inappetence, hair loss, and poor reproductive performance. The study also highlighted the condition known as "blind staggers" or polioencephalomalacia (PEM) in ruminants, which was linked to excess sulfur intake rather than selenium. The findings emphasized the importance of considering both Se and S levels in mine reclamation efforts to prevent toxicity in grazing animals.