Which organism is controlled by the use of Decoquinate in poultry?

Decoquinate is specifically used as an anticoccidial drug in poultry, targeting the life cycle of Eimeria spp., which are the protozoan parasites responsible for coccidiosis. Coccidiosis is a common disease that affects the intestinal tract of poultry, leading to significant health issues and economic losses in the industry. Decoquinate works by inhibiting the growth of the Eimeria organisms, preventing them from multiplying and causing further harm to the host animals.

In contrast, the other organisms listed have different treatments and implications in poultry health. Ascaridia galli is a type of roundworm, and its management typically involves anthelmintics that specifically target nematodes. Capillaria spp. also relates to a different group of helminths requiring alternative anthelmintic approaches. Strongyloides vitulorum, while also a parasitic infection, has a different life cycle and does not respond to Decoquinate. Thus, the primary application of Decoquinate in poultry is indeed for the control of Eimeria spp., making it the correct choice.