[Antibiotic residues in organs and muscle tissues of broilers. I. Bacitracin, flavomycin, spiramycin and viriniamycin residues following administration of diets containing low levels of these antibiotics (author's transl)].

Two groups of broilers were fed two different feed mixtures. A feed containing a mixture of bacitracin, flavomycin, spiramycin and virginiamycin (20 ppm each) was administered to sixity broilers. Sixty other broilers were given a similar feed not containing any antibiotics. After slaughter, samples of kidney, liver and breast were examined for the presence of antibiotic residues. All samples were found to be negative for antibiotic residues. Four micro-organisms were used in performing the tests: Bacillus cereus Kiel, Bacillus subtilis 165, Bacillus subtilis BGA and Micrococcus luteus ATCC 9341.