Percentage cytotoxicity in porcine macrophages exposed to DON at 0.005 to 50 μg/mL. Twenty-four hours later, the cytotoxic effect was determined by WST-1 assay. Results represent the means of three independent experiments conducted in triplicate and their standard deviation. Superscript (a) refers to a significantly higher cytotoxic effect compared to the unexposed control wells (p < 0.05).