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Logo of compmedJournal Web siteSee also archive of Canadian Journal of Comparative MedicineNow Published as Canadian Journal of Veterinary ResearchFormerly published as Canadian Journal of Comparative Medicine and Veterinary Science. 1940 to 1968.
 
Can J Comp Med. 1980 July; 44(3): 338–345.
PMCID: PMC1320083

Sulfamethazine residues in uncooked edible tissues of port following recommended oral administration and withdrawal.

Abstract

Commercial feed rations containing sulfamethazine at the level of 110 ppm were fed for a period of 65 days to market pigs in a study simulating normal farm practices. The levels of sulfamethazine at the end of medication were in excess of 10 ppm in liver and kidney and up to 2.6 ppm in muscle tissues. Concentrations of sulfamethazine in tissues from pigs after withdrawal of medicated feed depleted to 0.1 ppm within nine days. The rate of depletion was similar for all tissues. It was observed that storage of tissue samples at freezer temperature (-20 degrees C) for 30 days further reduces sulfamethazine levels by 3 to 20% of their original value.

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