Wastes of antimicrobial agents in cattle and pork canals in a municipal slaughterhouse

Abstract

Sampling is a total of 1.332 canals of which 612 were from cattle and 720 pigs. The detection was made through the system of microbiological agar diffusion using Bacillus subtillis ATCC 6633, with a concentration of spores of 106

CFU/mL as a reference microorganism. Of the 612 carcasses of cattle, 330 (53.92%) were positive and 316 (43.88%) in order to porcines, were positive for the presence of residues of antibiotics. With regard to the tissues were processed 3 996 samples, giving positive 1 683 (42.11%). In the muscle detect the largest 770 (45.75%) and 913 (54.24%) negative. The increased frequency of positive was detected in pH 6.0, suggesting that these animals were treated with Chloramphenicol might, tetracycline or penicillin, because these antimicrobials has its optimum distribution in this pH. These results show that does not respect the time of disposal established by the manufacturing laboratory.