What causes eosinophilic granulomatosis with polyangiitis (EGPA, formerly Churg-Strauss Syndrome)?

What causes eosinophilic granulomatosis with polyangiitis (EGPA, formerly Churg-Strauss Syndrome)?

The cause of EGPA inflammation is unknown.

Your immune system plays a role in EGPA. The immune system acts to protect the body against “foreign invaders” (germs, bacteria) that cause infections, disease and other injuries to the body. Sometimes your immune system becomes over active and can cause inflammation.