Journal
APMIS
Volume 118, Issue 11, Pages 895-902Publisher
WILEY-BLACKWELL
DOI: 10.1111/j.1600-0463.2010.02676.x
Keywords
H5N1 avian influenza virus; in situ hybridization; viral RNA; sialic acid receptor
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Funding
- Faculty of Medicine, Siriraj Hospital
- National Center for Genetic Engineering and Biotechnology of Thailand
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Avian influenza virus H5N1 infects and causes severe disease in humans. Despite the increasing number of fatal cases in 15 countries and the threat of influenza pandemic, detailed pathologic and virologic findings in humans are limited. In this study, we describe histopathologic findings, distributions of viral RNA and the Neu5Ac alpha 2-3Gal beta 1-4 sialic acid receptor in human tissues from three fatal avian influenza cases. Many of our findings are in agreement with previously published autopsy studies, that is, viral RNA and receptor were detected in type II pneumocytes, tracheal epithelium, intestinal epithelium, spleen, lymph nodes, and Kupffer's cells. In addition, we detected the viral RNA in glomeruli and renal tubules. There was a good correlation between viral RNA distribution and the presence of the sialic acid receptor. Despite the wide distribution of viral RNA, tissue damage and inflammation were mainly limited to pulmonary tissue.
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