Setaria is a genus of parasitic roundworms that infect domesticated mammals such as pigs, camels, cattle and horses.

They are mostly large-sized roundworms, possessing an elaborate head (cephalic) region that is characterised by spines, presence of four lips, and well-guarded mouth.

The larval infective forms are transmitted from one animal to another by the bite of mosquitoes and flies.

In addition Setaria marshalli can be transmitted from the womb to new-born calf.

[4] A rare case of human infection was recorded in 2016 from a 15-year-old Iranian girl, who was diagnosed with Setaria equina in her eye.