This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Blood, Subject name: Pediatrics
All are causes of eosinophilia except: 
Select and explain. 
A. Allergic Rhinitis, B. Trichinosis, C. Corticosteroid therapy, D. Rhematoid arthritis
C: Corticosteroid therapy
Answer: C: Corticosteroid therapy 
Explanation: Ans: C (Corticosteroid therapy) Ref: Nelson Textbook of Pediatrics, 19th edition. Pg 740.Explanation:Corticosteroid therapy causes eosinopenia.Causes of EosinophiliaAllergic DisordersAllergic rhinitisAsthmaAcute and chronic urticariaHypersensitivity drug reactionsInfectious DiseasesTissue-Invasive Helminth Infections TrichinosisToxocariasisStrongyloidosisAscariasisFiiariasisPneumocystis cariniiToxoplasmosisAmebiasisMalariaBronchopulmonary aspergillosisScabiesMalignant DisordersBrain tumorsHodgkin disease and T-cell lymphomaMyeloproliferative disordersGastrointestinal DisordersInflammatory bowel diseaseEosinophilic gastroenteritisChronic active hepatitisRheumatologic DiseaseRheumatoid arthritisEosinophilic fascitisImmunodeficiency DiseaseHyper-IgE syndromeWiskott-Aldrich syndromeLoftier syndromeEosinophilic leukemiaHypersensitivity pneumoniaMiscellaneousThrombocytopenia with absent radiiVasculitisHistiocytosis with cutaneous involvement