324 results
Allergic Rhinitis: Pathogenesis and clinical findings

1. Allergy Sensitization -> Antigen Exposure -> APC (macrophages, HLA class
Allergic Rhinitis ... Allergy Sensitization ... (neutrophils, eosinophils ... proliferation of eosinophils ... Tissue edema #Allergic
Type I Hypersensitivity: Pathogenesis and clinical findings
Definition: Production of lgE Antibodies that bind to harmless allergens
leading to an allergic ... "Sensitization" ... to Allergen: Initial ... exposure to allergen ... after clearance of allergen
Causes of Eosinophilia - Differential Diagnosis
Bugs:
 - Fungus (aspergillosis)
 - Viral (HIV)
 - Ectoparasites (scabies, myiasis)
Causes of Eosinophilia ... DRESS - AIN - Eosinophilic ... Glucocorticoids Pugs (Allergies ... ): - Allergic ... Rhinitis - Allergic
Eosinophilia - Differential Diagnosis Algorithm
Idiopathic Eosinophilia
Primary Eosinophilia:
 • Primary hypereosinophilic syndrome
 • Eosinophilic Leukemia
 • MPN/MDS
Eosinophilia - Differential ... Primary Eosinophilia ... Secondary Eosinophilia ... histiocytosis • Allergic ... Diagnosis #Algorithm #allergy
Differential Diagnosis of Pulmonary Eosinophilia
Infection:
 • Helminthic: Loffler syndrome (Ascaris, hookworm, Strongyloides), Tropical pulmonary eosinophilia (lymphatic
Diagnosis of Pulmonary Eosinophilia ... Tropical pulmonary eosinophilia ... coccidioidomycosis), Allergic ... sting Others: • Eosinophilic ... chronic pulmonary eosinophilia
Hypersensitivity: Summary
Type I Hypersensitivity:
 • Immunological Mediator: lgE
 • Immunological Target: Allergen Molecules
 • Ex: Antibiotic
Immunological Target: Allergen ... Ex: Antibiotic allergies ... cephalosporin), Food allergies ... fever, Urticaria, Allergic ... #Allergic #Reactions
Approach to Eosinophilic Lung Diseases
 • Acute Eosinophilic Pneumonia (< 1 wk) - ~30yo, M; Recent
Approach to Eosinophilic ... Diseases • Acute Eosinophilic ... SOB • Chronic Eosinophilic ... ; Hx of asthma/allergies ... loss, malaise • Allergic
Eosinophilic Pneumonia
When to suspect Eosinophilic Pneumonia? Non-resolving pneumonia + BAL > 25% eosinophils + excluded more
Eosinophilic Pneumonia ... When to suspect Eosinophilic ... pneumonia + BAL > 25% eosinophils ... diagnoses Acute Eosinophilic ... Rare Peripheral Eosinophilia
Eosinophilic meningitis
#eosinophilicmeningitis #eosmeningitis #angiostrongylus #baylisascaris #gnathostoma #raccoon #snail

By Dr. Sara Dong @swinndong via Febrile [febrilepodcast.com
Eosinophilic meningitis ... Ddx #Diagnosis #eosinophilia ... #eosinophil #fever
Eosinophil Disorders Testing Algorithm
INDICATIONS FOR TESTING:
 • Peripheral blood eosinophilia/hypereosinophilia uncovered incidentally during medical evaluation or
Eosinophil Disorders ... Peripheral blood eosinophilia ... specific symptoms • Eosinophilia ... secondary causes of eosinophilia ... causes are asthma, allergy