Surveillance of hemorrhagic fever and/or neuroinvasive disease: challenges of diagnosis
DOI:
https://doi.org/10.11606/s1518-8787.2021055003068Keywords:
Autopsy, Hemorrhagic fevers, viral,etiology, Arbovirus infections, mortalityAbstract
OBJECTIVE To evaluate the performance of post mortem laboratory analysis in identifying the causes of hemorrhagic fever and/or neuroinvasive disease in deaths by arbovirus infection. METHODS Retrospective cross-sectional study based on the differential analysis and final outcome obtained in patients whose samples underwent laboratory testing for arboviruses at the Pathology Center of the Adolfo Lutz Institute, in São Paulo, Brazil. RESULTS Of the 1355 adults clinically diagnosed with hemorrhagic fever and/or neuroinvasive disease, the most commonly attributed cause of death and the most common final outcome was dengue fever. Almost half of the samples tested negative on all laboratory tests conducted. CONCLUSION The failure to identify the causative agent in a great number of cases highlights a gap in the diagnosis of deaths of unknown etiology. Additional immunohistochemical and molecular assessments need to be added to the post-mortem protocol if all laboratory evaluations performed fail to identify a causative agent. While part of our findings may be due to technical issues related to sample fixation, better information availability when making the initial diagnosis is crucial. Including molecular approaches might lead to a significant advancement in diagnostic accuracy.
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Copyright (c) 2021 Leonardo José Tadeu de Araújo, Lorenzo Lang Gonzalez, Lewis Fletcher Buss, Juliana Mariotti Guerra, David Salas Gomez, Camila Santos da Silva Ferreira, Cinthya Santos Cirqueira, Fábio Ghillardi, Steven S. Witkin, Ester Cerdeira Sabino
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Fundação de Amparo à Pesquisa do Estado de São Paulo
Grant numbers 2018/14389-0
