Sickle Cell Anemia
Sickle cells have a high turnover rate, and there is a deficit of red blood cells in the bloodstream. Common symptoms of anemia include fatigue, paleness, and a shortness of breath. A particularly severe form of anemia—aplastic anemia—occurs following infection with parvovirus. Parvovirus causes extensive destruction of the bone marrow, bringing production of new red blood cells to a halt. Bone marrow production resumes after 7-10 days; however, given the short lives of sickle cells, even a brief shut-down in red blood cell production can cause a precipitous decline in hemoglobin concentrations. This is called "aplastic crisis."
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