what causes hantavirus pulmonary syndrome to emerge quizlet

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  • Feb 02, 2020

Infectious Diseases and Epidemiology - MT I Flashcards | Quizlet
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a recent outbreak of severe lung disease in the southwestern United States is related to the etiology of previously unknown hantavirus. The virus has been isolated from the main reservoir, deer mouse, Peromyscus maniculatus, and was recently named Sin Nombre virus. Clinically, the disease has become known as hantavirus pulmonary syndrome (HPS). Since May 1993, 44 fatal cases of HPS have been identified through a review of clinicopathological and immunohistochemical (IHC) testing tissue from 273 patients who died from pulmonary edema noncardiogenic described. In 158 cases a suitable specimen available, serological testing and / or polymerase chain reaction-reverse transcription (RT-PCR) amplification of RNA extracted were also made. IHC, serology and PCR results are appropriate for almost all patients with HPS and non-HPS when more than one assay was performed. The prodromal illness of HPS is similar to many other viral diseases. Consistent hematologic features including thrombocytopenia, hemoconcentration, neutrophilic leukocytosis with a left shift, and reactive lymphocytes. pulmonary histopathologic features were similar in the majority of cases are fatal HPS (40/44) and consists of interstitial pneumonitis with mononuclear cell infiltrate variables, edema, and hyaline membrane focus. In four cases, however, differ significantly pulmonary features and include diffuse alveolar damage and the degree of disorganization variables severe air space. IHC analysis showed widespread presence of antigen hantaviral in endothelial cells of the microvasculature, particularly in the lungs. Hantaviral antigen was also observed in the follicular dendritic cells, macrophages, and lymphocytes. Hantaviral inclusion observed in endothelial cells thinsection lungs by electron microscopy, and their identity verified by immunogold label. Virus-like particles seen in lung endothelial cells and macrophages. HPS is a newly recognized disease that is often fatal, with the spectrum of microscopic morphological changes, which may be a leading cause of severe and fatal disease presenting as adult respiratory distress syndrome.

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