Residues of Tetracycline Antibiotic in Marketed Goats and Pigs in Lagos and Ogun States Nigeria

Abstract

Antibiotics used in food animals can occuras residues in thew products and constitute health risks to the consumers.
360fresh meat samples comprising of liver, kidney and muscle tissues of goats and pigs collectedfiom open markets
in Ogun and Lagos States were analyzed for residues of tetracycline antibiotics. Microbiological assay method was
adopted, and Bacillus subtilis (ATCC 6633) organism used to detect residues of tetracycline on Antibiotic medium
2 agar. The study revealed that 15.6% of the meat samples from the two states were positive for residues of
tetracycline antibiotic. The concentration of the residues rangedfrom O.Olpg/g to 0.06p@g. The mean residue
concentration recorded in goat meat samples is not signijicantly (P>0.05) higher than that recorded in the ptg
samples. The mean residue concentrations recorded between the states and across the organs were haoeversign~$cmtly
(P<0.05) diflerent. Some of the muscle samples recorded tetracycline residue concentrations higher than the
recommended tolerance levels. The health hazard associated with such high residue lmek in meat is drug resistance;
consumers of such meats may develop resistance to tetracycline antibiotic when the need arises.