Residue investigation is a fundamental part of sanitary inspection in slaughterhouses. In the ante mortem and post mortem phase, for the identification and sampling of possible suspects. In the post mortem in the slaughterhouse, mainly for screening and in external laboratories, for laboratory confirmation of positives.
The objective of this collection is to offer professionals, technicians and students of related degrees, an instrument of consultation, for teaching and continuing education. Based on communications presented to congresses and conferences, publications and photos of animals, carcasses or suspicious and/or positives materials, the history of the use in Spain, of growth promoters in intensive livestock farming, mainly bovine, from 1988 to 1993 is presented. Acknowledgments: to official veterinarians and professionals of the sector.