Nitarsone

Nitarsone is an organoarsenic compound that has been used as a feed additive in poultry production. It has been employed to help control histomoniasis, a parasite-caused disease also known as blackhead that can affect turkeys and other birds. In some programs, nitarsone is also associated with improvements in growth performance or feed efficiency when used under regulated conditions.

Administration and regulation typically involve adding the compound to medicated poultry feed at approved dosages, with specified withdrawal times before birds enter the food supply. Regulatory oversight varies by country, but in many places nitarsone and other arsenic-containing feed additives are subject to stringent evaluation due to potential residues in edible tissues.

Safety and residues are central to the regulatory concern. Arsenic-containing compounds can yield residues that may convert to inorganic arsenic in the body, raising questions about consumer exposure. Consequently, national authorities often require residue monitoring, risk assessments, and clear labeling or restricted use. Some jurisdictions have restricted or banned arsenical feed additives, or require strict compliance with withdrawal periods and labeling.

In summary, nitarsone has been used to mitigate histomoniasis in poultry and to influence production metrics, but its use is governed by safety-focused regulations aimed at limiting arsenic exposure in humans. Producers and veterinarians relying on nitarsone follow country-specific guidelines and monitor residue safety before products enter the food chain.