New study on antimicrobials in chicken feeds

27th April 2021 Past Events and Activities 0

A new study on antimicrobials in chicken feeds from the ViParc project has been recently published in PLOS-ONE. The study, conducted by Nguyen Van Cuong, examined the labels of commercial feeds consumed by 338 chicken flocks raised in the Mekong Delta of Vietnam. Thirty-five of 99 (35.3%) different antimicrobial-containing feed products identified included at least one antimicrobial active ingredient. Eight different AAIs (avilamycin, bacitracin, chlortetracycline, colistin, enramycin, flavomycin, oxytetracycline, virginamycin) belonging to five classes were identified. Brooding feeds contained antimicrobials the most (60.0%), followed by grower (40.9%) and finisher feeds (20.0%). Quantitatively, chlortetracycline was consumed most (42.2 mg/kg chicken produced), followed by enramycin (18.4 mg/kg), bacitracin (16.4 mg/kg SEM ±0.20, 19.4%) and colistin (6.40 mg/kg). A total of 10 (9.3%) products were not compliant with existing Vietnamese regulation (06/2016/TT-BNNPTNT) either because they included a non-authorised AAI (4), had AAIs over the permitted limits (4), or both reasons (2). The study, carried out before legislation restricting antimicrobials in feeds, are indicative of the challenges likely to be faced in monitoring and implementation of new upcoming legislation. The study can be accessed here:

A sack containing commercial feed for chicken flocks, potentially including four antimicrobial active ingredients (colistin, neomycin, florfenicol and kitasamycin)