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Scientific Opinion on the safety and efficacy of Aviax 5% (semduramicin sodium) for chickens for fattening

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Published on: Mon, 23 Jul 2018 00:00:00 +0200

The feed additive Aviax 5%, containing the active substance semduramicin sodium, an ionophore anticoccidial, is intended to control coccidiosis in chickens for fattening at a dose of 20−25 mg/kg complete feed. Semduramicin sodium is present in Aviax 5% in its mycelial form and is produced by fermentation of Actinomadura spp. (ATCC 53664). Semduramicin sodium is active against certain Gram‐positive bacteria, while Gram‐negative bacteria are resistant; its use as a feed additive is unlikely to increase shedding of Salmonella, Escherichia coli and Campylobacter and to induce resistance and cross‐resistance to antimicrobials used of human and animal relevance. In the absence of a tolerance study in chickens for fattening performed according to the current EU standards, the FEEDAP Panel cannot conclude on the safety of Aviax 5%, containing semduramicin mycelium. Semduramicin sodium in the feed is not compatible with the concurrent use of tiamulin. Mycelial semduramicin sodium is not genotoxic. There is no evidence that the mycelial semduramicin is more toxic than the crystalline by oral administration. The acceptable daily intake (ADI) of 0.00125 mg/kg set for the crystalline semduramicin is applicable to mycelial semduramicin. The use of semduramicin sodium is safe for the consumer provided a withdrawal time of 24 h is respected. No conclusions can be made on the irritancy of Aviax 5% to skin and eye and on the potential for dermal and respiratory sensitisation. Model calculations on inhalation exposure of persons handling the additive indicate a serious risk. Aviax 5% used in feed for chickens for fattening up to 25 mg/kg complete feed does not pose a risk for the terrestrial compartment. A risk for the aquatic compartment and for groundwater pollution cannot be excluded. Aviax 5% at a minimum dose of 20 mg/kg feed has the potential to effectively control coccidiosis in chickens for fattening.

© European Food Safety Authority, 2015

Scientific Opinion on the safety and efficacy of Aviax 5% (semduramicin sodium) for chickens for fattening


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