Arsenic compound (4-nitrophenylarsonic acid, 4-NPAA) used as animal feed additive for the prevention of blackhead (Histomoniasis) in turkeys.
The term "Nitarsone" was found in the following pages:
Arsenic exposure from Poultry Meat produced in the US before 2015 | EVISA's News
U.S. sales of widely used drug "Roxarsone" for chickens to be suspended | EVISA's News
The use of arsenic in "poultry industry" | EVISA's News