Antibiotic Residue Screening in Liver, Kidney, and Muscle Tissues of Non-Monitored Poultry Products, Cull-broiler and Cull, Sold in La Trinidad, Benguet

Abstract

Cull-broiler and cull are popular poultry meat products in Cordillera Administrative Region (CAR), Philippines but these are not being monitored by authorities for antibiotic residue. This antibiotic residue could pose a direct threat to consumer’s health; thus, this study deemed it necessary to detect the presence of antibiotic residue in the liver, kidney and muscle tissues of cull-broiler and cull being sold in La Trinidad, Benguet using disc diffusion technique or the Kirby-Bauer Disc Method. Results revealed presence of antibiotic residues in the three tissues of cull-broiler. The liver tissue samples had the highest number with positive results against the three test bacteria. This result implies the highest incidence of antibiotic residue in liver tissues followed by kidney and least in muscles. Additionally, cull-broiler has greater incidence of antibiotic residue than cull. Also, there is a significant difference in the level of antibiotic residue present between the tissues of cull-broiler and cull, as shown by the mean diameter (mm) of inhibition zone. Tissues of cull-broiler had the widest mean zone of inhibition as compared to the tissue of culled chicken. Moreover, the zone of inhibition is significantly affected by the type of chicken and the type of tissue indicating that the level of antibiotic residues depends on the type of chicken and the type of tissue. Though the presence of antibiotic residue in the different tissues is relatively small, it still indicates the potential for public health risk. Concerned agencies should not only check broiler for the presence of antibiotic residue but should also include cull-broiler and cull chicken sold in the market.