Thiamine Transporter (Eimeria species)

The thiamine transporter in *Eimeria* species is a membrane protein responsible for the uptake of thiamine (vitamin B1) from the host environment into the parasite. Thiamine is essential for carbohydrate metabolism and energy production, making this transporter critical for parasite survival and proliferation. Targeting this transporter forms the basis of several anticoccidial therapies used widely in poultry farming. Drugs like amprolium are administered via drinking water or feed with minimal withdrawal times required before slaughter due to their selective action on parasites over hosts. Some drug-resistant lines of *Eimeria* exhibit altered kinetic properties at their thiamine transporters, potentially reducing drug efficacy; however, resistance remains relatively uncommon compared with other targets.

Competitive inhibition of thiamine uptake