Detección de residuos antimicrobianos en músculo, hígado y riñón de cerdo expendidos en Bogotá, Colombia
Ujueta Rodríguez, Sandra | 2016-07
In this study, the presence of antimicrobials residues in pork tissues of markets, neighborhood groceries and butcher’s shops in Bogota city (Colombia) was investigated. The study was performed following a two-step procedure: the first step consisting in the detection of beta-lactams, streptomycin and sulfamethazine traces using the microbiological method of the three plates with Bacillus subtilis; and the second step, following the commercial method ELISA for the sam-ples showing a positive result. The samples were considered positive only if the presence of antimicrobials residues was confirmed by the two methods. The agreement in the results obtained by the two methods was also estimated (k). Out of 212 samples analyzed, 33.0% were positive for at least one antimicrobial product. For liver samples, 45.2% were positive to beta-lactams, 10.8% to streptomycin and 28.6% to sulfa-methazine. In the case of kidney 44.8% were positive to pe-nicillin, 10.3% to streptomycin and 23.1% to sulfamethazine. Muscle showed a 9.7% positive result to beta-lactams, 0% to streptomycin and the only sample positive to sulfamethazine by the microbiological method, was also positive by the ELI-SA method. The results obtained by the two methods (micro-biological and ELISA) were in agreement (k > 0.60) and they indicate a high presence of antimicrobials in the commer-cialized pork tissues. This fact indicates that the slaughter of animals without respecting the time of retirement is a com-mon practice and it shows the need to implement a waste plan throughout the pork meat chain.