Hematologic disorders in leptospirosis

Authors

  • A. C. Nicodemo USP; FM; Departamento de Doenças Infecciosas e Parasitárias
  • N. Medeiros USP; FM; Hospital das Clínicas; Laboratório Central
  • G. Del Negro USP; FM; Departamento de Doenças Infecciosas e Parasitárias
  • V. Amato Neto USP; FM; Departamento de Doenças Infecciosas e Parasitárias

Keywords:

Leptospirose, Alterações laboratoriais

Abstract

30 cases of leptospirosis admitted to the Clinica de Doenças Infecciosas e Parasitárias do Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo were studied for blood count alterations. 16 patients (53,3%) had a normal white blood cell count at the moment of admission. 12 patients (40%) presented a high white blood cell count and 2 (6,6%) had a low count. 29 patients (96,6%) had a high proportion of neutrophils and 25 patients (83,3%) presented a high number of immature forms. 24 patients had anemia. Thrombocytopenia was present in 26 patients (86.6%). The most characteristic changes found in bone marrow aspirate were the alterations of M: E ratio (myeloid - erythroid ratio) due to relative and/or absolute hyperplasia of the myeloid series, and/or relative and/or absolute hypoplasia of the erythroid series; erythropoiesis was predominantly microerythroblastic in many patients; mild to moderate plasmocytosis was found; and, regarding the intersticial series, increased macrophagic activity was noted. There was no direct correlation between the number of megakaryocytes and the blood platelet count, but there was a direct correlation between the bone marrow platelet production and blood platelet count. We believe that it is very difficult to have a good idea of the dynamic mechanisms that lead to medular platelet production in the presence of platelet consumption, through a random test of the bone marrow.

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Published

1989-04-01

Issue

Section

Original Articles

How to Cite

Hematologic disorders in leptospirosis . (1989). Revista Do Instituto De Medicina Tropical De São Paulo, 31(2), 71-79. https://revistas.usp.br/rimtsp/article/view/28642