In a study of dengue fever in Thailand, bone-marrow examinations showed hypocellularity early in the disease, followed by hypercullarity during recovery and normocellularity in convalescence. Thrombocytopenia due to megakaryocytic suppression was a characteristic. In 18 patients with early dengue, thrombocytopenia lasted one to four days; platelet counts in 8 were less than 50,000/cu cm. Petechiae or other bleeding manifestations were noted in 15 patients. Intensive hematologic studies of dengue infections in other geographic areas are suggested, to determine if thrombocytopenia is a universal characteristic of this and related virus diseases.
Nelson ER, Bierman HR. Dengue Fever: A Thrombocytopenic Disease?. JAMA. 1964;190(2):99–103. doi:10.1001/jama.1964.03070150009002
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