Overview
Sickle cell-Hemoglobin O Arab (HbO Arab) disease is a rare variant of sickle cell disease characterized by the presence of hemoglobin O Arab, which can lead to clinical manifestations similar to other sickle cell disorders, including hemolytic anemia and vaso-occlusive crises 1.Diagnosis
Complete Blood Count (CBC): Essential for identifying abnormal red blood cell morphology and hemoglobin levels 1.
Hemoglobin Electrophoresis: Required to confirm the presence of HbO Arab 1.
Manual Blood Cell Counting: Necessary due to challenges with automated analyzers in accurately differentiating nucleated erythrocytes and thrombocytes 1.Management
Hydration and Pain Management: Intravenous fluids and analgesics for vaso-occlusive crises 1.
Hydroxyurea: May be considered to reduce vaso-occlusive events and improve overall hematologic parameters, though specific dosing for HbO Arab is not detailed 1.
Blood Transfusions: Indicated for severe anemia or acute complications 1.Special Populations
No specific data: The provided abstracts do not cover management in pregnancy, pediatrics, elderly, or comorbid conditions 1.Key Recommendations
Utilize hemoglobin electrophoresis for definitive diagnosis of HbO Arab disease (Evidence: Expert opinion) 1.
Employ manual blood cell counting due to limitations of automated analyzers in accurately quantifying cell populations (Evidence: Moderate) 1.
Manage vaso-occlusive crises with hydration and appropriate analgesia; consider hydroxyurea for chronic management (Evidence: Moderate) 1.References
1 Meazzi S, Martini V, Moretti A, Lubian E, Paltrinieri S, Giordano A. Automated hematological cell count using sysmex XN-1000V in Testudo hermanni: Agreement with manual count. Research in veterinary science 2024. link