Abstract
Due to faulty use of a chlorpyriphos-diazinon combination as a pesticide within a laboratory animal house, 19 marmosets of 2 species (Saguinus fuscicollis and Callithrix jacchus) of 98 at risk died from organophosphorous poisoning (19% mortality). The clinical signs were those of cholinesterase inhibitors. The morphological lesions consisted predominantly of haemorrhages in several organs, particulary the CNS, and of bone marrow necroses.