[Aplastic crisis due to parvovirus B19 and Epstein-Barr virus in a patient with hereditary spherocytosis].

Anemic syndrome in childhood requires a diagnosis and urgent treatment guided by systematic protocols that can avoid unnecessary additional testing. The case of a 4 year-old girl with fatigue and intermittent fever of 7 days duration, accompanied by abdominal pain is presented. She had regular general health status, with mucocutaneous jaundice, a grade III/VI/iv murmur, and painful abdomen with hepatosplenomegaly. The blood analysis showed a hypo-regenerative anemia with increased LDH and indirect bilirubin. The Coombs Test was negative, with spherocytes being observed in the peripheral blood smear. The IgM and IgG were positive for parvovirus B19 IgM and Epstein Barr virus, leading to the diagnosis of aplastic crisis in a patient with hereditary spherocytosis. No specific treatment was required. Under the suspicion of anemic syndrome in emergencies, the ABCDE sequence must be followed. Through the history, physical examination and basic laboratory tests, an initial diagnostic approach can be made. Specific etiological tests should be based on this first study.