Center for Chemical Toxicology Research and Pharmacokinetics, College of Veterinary Medicine, North Carolina State University, Raleigh, USA
Correspondence Ronald Baynes, North Carolina State University, 4700 Hillsborough St, Raleigh, NC 27606. E-mail: Ronald_Baynes@ncsu.edu
Received
05 March 2009
Revised
12 October 2009
Accepted
10 November 2009
Abstract Recent adulteration of milk products with melamine in several countries caused adverse health effects and even deaths in infants. Earlier, in 2007, contamination of pet food with melamine and its related contaminants was associated with many clinical cases of canine and feline nephrotoxicity, and in some cases mortality. Melamine is a triazine compound which is often detected with other triazine analogues such as cyanuric acid. As is the custom in some livestock operations, the contaminated pet food was mixed with feed intended for the swine and poultry industry. This practice has raised several questions as to whether melamine and its related triazines would adversely affect the health of these food animals, and whether meat products derived from swine and poultry could contain high-enough levels of these contaminants to warrant public health concern. Data for this review article were obtained from recent research efforts in our laboratory, peer-reviewed publications cited in PubMed, and information available at USDA, US FDA, and WHO websites. The primary issues discussed are related to (1) the chemistry and interactions between melamine and its triazine analogs, (2) reported animal and human exposures with possible pathways through which melamine can enter the human food chain; (3) mammalian toxicology; (4) comparative pharmacokinetics and modeling strategies used to predict residue levels; and (5) emerging issues and management strategies.
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