In horses, primary bacterial infection is rare, and more common causes include '''trauma''', allergic reactions to insect bites, '''exposure to intense solar radiation''', [[Ringworm|ringworm]] and '''[[Cutaneous Habronemiasis|cutaneous habronemiasis]]'''. | In horses, primary bacterial infection is rare, and more common causes include '''trauma''', allergic reactions to insect bites, '''exposure to intense solar radiation''', [[Ringworm|ringworm]] and '''[[Cutaneous Habronemiasis|cutaneous habronemiasis]]'''. |