RESUMO
BACKGROUND: This study measured tetracycline residue in table eggs sampled from Isfahan markets in 2015 and assessed the toxic effects of heated egg yolk on hepatic cells. METHODS: Forty commercial and six locally produced eggs were randomly collected and tested for tetracycline resides using competitive ELISA with a mean recovery value of 65.22% and limit of detection (LOD) of 4 ng/g. For the seven most contaminated samples, albumen and yolk were examined individually and, despite the very low detected level in the yolk, the samples were subjected to boiling for 10 min. Finally, the DNA damaging properties of the raw or treated egg yolks on hepatic cells were investigated using the comet assay. RESULTS: The residue levels ranged from
