Transient erythroid hypoplasia in hereditary spherocytosis is caused by:: (A) Epstein Barr virus, (B) Parvovirus B19, (C) CMV, (D) Hepatitis B
Answer is B. Parvovirus B 19 can cause transient red cell aplasia in patients with hemolytic disorders. It can cause aplastic crisis. Ref: Harrisons principles of internal medicine, 18th edition, Page 874.