
| 10.1590/0037-8682-0850-2020
http://scihub22266oqcxt.onion/10.1590/0037-8682-0850-2020
 33886821!8047700!33886821
free
free
free
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Rev+Soc+Bras+Med+Trop 2021 ; 54 (�): e0850 Nephropedia Template TP
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Pathological findings and morphologic correlation of the lungs of autopsied patients with SARS-CoV-2 infection in the Brazilian Amazon using transmission electron microscopy #MMPMID33886821Santana MF; Pinto RAA; Marcon BH; Medeiros LCAS; Morais TBDN; Dias LC; Souza LP; Melo GC; Monteiro WM; Lacerda MVG; Val FA; Lalwani PJ; Ferreira LCLRev Soc Bras Med Trop 2021[]; 54 (�): e0850 PMID33886821show ga
INTRODUCTION: Electron microscopy (EM) is a rapid and effective tool that can be used to create images of a whole spectrum of virus-host interactions and, as such, has long been used in the discovery and description of viral mechanisms. METHODS: Electron microscopy was used to evaluate the pulmonary pathologies of postmortem lung sections from three patients who died from infection with SARS-associated coronavirus 2 (SARS-CoV-2), a new member of the Coronaviridae family. RESULTS: Diffuse alveolar damage (DAD) was predominant in all three patients. The early exudative stage was characterized principally by edema and extravasation of red blood cells into the alveolar space with injury to the alveolar epithelial cells; this was followed by detachment, apoptosis, and necrosis of type I and II pneumocytes. The capillaries exhibited congestion, exposure of the basement membrane from denuded endothelial cells, platelet adhesion, fibrin thrombi, and rupture of the capillary walls. The proliferative stage was characterized by pronounced proliferation of type II alveolar pneumocytes and multinucleated giant cells. The cytopathic effect of SARS-CoV-2 was observed both in degenerated type II pneumocytes and freely circulating in the alveoli, with components from virions, macrophages, lymphocytes, and cellular debris. CONCLUSIONS: Viral particles consistent with the characteristics of SARS-CoV-2 were observed mainly in degenerated pneumocytes, in the endothelium, or freely circulating in the alveoli. In the final stage of illness, the alveolar spaces were replaced by fibrosis.|*COVID-19[MESH]|*SARS-CoV-2[MESH]|Brazil[MESH]|Endothelial Cells[MESH]|Humans[MESH]|Lung[MESH]
  
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