1. Eosinophilia is not a sign ) unless it is idiopathic.2. Harm resulting from untreated eosinophilia potentially varies with cause. 3. Eosinophilia and elevated IgE levels are chief hematological findings.4. However, the mechanisms by which CYBA mutations lead to eosinophilia remain unknown. 5. Five presented with gastrointestinal complaints and the other five had unexplained peripheral eosinophilia . 6. Mepolizumab is a monoclonal antibody against IL-5 which can reduce excessive eosinophilia . 7. Peripheral eosinophilia and the presence of infiltrate suggest it may be a hypersensitivity reaction. 8. Lung biopsy is not part of the routine diagnostic workup of tropical pulmonary eosinophilia . 9. Eosinophilia has also been documented, as well as edema, in post-marketing.10. Absence of eosinophilia may indicate poor prognosis. 
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