All are causes of Pulmonary Infiltrates with Eosinophilia with known etiology, EXCEPT:

This is really a good question. Need to be very thorough about it to answer. The table in harrison will give the clear answer without doubt: Allergic bronchopulmonary mycosis such as those caused by Penicillium, Candida, Curvularia, or Helminthosporium spp. A. fumigatus is the most common cause of ABPA. Loeffler's syndrome was originally repoed as a benign, acute eosinophilic pneumonia of unknown cause characterized by migrating pulmonary infiltrates and minimal clinical manifestations. Eosinophilia-myalgia syndrome is an incurable and sometimes fatal flu-like neurological condition that is believed to have been caused by ingestion of poorly produced L-tryptophan supplement. Ref: Harrisons Principles of Medicine, 18th Edition, Chapter 255, Table 255-2, Page 2119