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Virus Res. 2009 Jan;139(1):122-6. doi: 10.1016/j.virusres.2008.10.001. Epub 2008 Dec 4.

Human adenovirus type 19: genomic and bioinformatics analysis of a keratoconjunctivitis isolate.

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The Molecular Pathogenesis of Eye Infection Research Center, Dean A. McGee Eye Institute, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States.


Human adenovirus type 19 (HAdV-19) is a major etiologic agent of epidemic keratoconjunctivitis (EKC), a common and severe eye infection associated with long-term visual morbidity due to persistent corneal inflammation. Ironically, while the prototype strain of HAdV-19 does not cause eye infections, other isolates of the serotype have caused major outbreaks of EKC. Here we have sequenced a clinical isolate of HAdV-19 (HAdV-19 strain C) from a human patient with EKC. Global pairwise alignment of HAdV-19C to other HAdV species D serotypes identified areas of sequence divergence in the penton base (host cell internalization signal), hexon (principal viral capsid structural protein), E3 (site of immunomodulatory genes), and fiber (host cell-binding ligand) regions. Comparison of HAdV-19 strain C to the recently sequenced HAdV-37, another EKC causing serotype, identified sequence diversity in the penton base and hexon, but sequence conservation in the E3 and fiber regions. Elucidation of the HAdV-19C genome will facilitate future studies into the pathogenesis of EKC, and may shed light on the genetic determinants of corneal tropism.

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