title: A survey of organochlorine pesticide residues in cheese samples from three Mexican regions.
abstract: Organochlorine pesticide residues were determined in cheese samples from three Mexican regions. All samples were found to be contaminated by these residues: p,p'-DDE was present in 100% of the samples. Other pesticides found with high frequencies were HCB, three of the BHC isomers, as well as heptachlor and its epoxide. Also found, although less frequently, were residues of p,p'-DDD, p,p'-DDT, aldrin, dieldrin and endrin. Samples from the region known as Comarca Lagunera had the highest number of pesticides per sample. The highest concentrations of residues were found in cheese samples from the Soconusco and the Comarca Lagunera regions.
authors.affiliation: División de Estudios sobre Contaminación Ambiental, Instituto Nacional de Investigaciones sobre Recursos Bióticos, and Centro de Ecodesarrollo, c/o Ap. Postal 474, Xalapa, Ver., 91000 Mexico.
authors.forename: L A
authors.initials: LA
authors.lastname: Albert
authors.forename: L
authors.initials: L
authors.lastname: Alpuche
authors.forename: C
authors.initials: C
authors.lastname: Bárcenas
authors.forename: J
authors.initials: J
authors.lastname: Rendón