Chromosomal aberrations in the cotton rat, sigmodon hispidus, exposed to hazardous waste

The study of chromosome damage in rodents living on hazardous‐waste sites may provide evidence of important biological consequences of chronic exposure to toxic chemical wastes. This study compared bone‐marrow cells of animals (Sigmodon hispidus) taken from two superfund waste‐disposal sites with those from an uncontaminated site and demonstrated that both populations exposed to hazardous wastes had significantly more structural and numerical aberrations than the control population.