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Clustered Cases of Human Adenovirus types 4, 7 and 14 Infections during the 2018 - 2019 Season revealed by US Department of Defense Respiratory Pathogen Surveillance and Whole Genome Sequencing

Pollio, A. R.; Fries, A. C.; Yang, Y.; Hughes, J. J.; Fung, C. K.; Conte, M. A.; Kuschner, R. A.; Conte, N. D.; Macias, E. A.; Hang, J.

2022-11-14 genomics
10.1101/2022.11.11.516166 bioRxiv
Show abstract

Human adenoviruses (HAdV) are genetically diverse and can infect a number of tissues with severities varied from mild to fatal. HAdV types 3, 4, 7, 11, 14, 21 and 55 were associated with acute respiratory illnesses (ARI) outbreaks in the US and in other countries. The risk of outbreaks can be effectively controlled by HAdV vaccination or mitigated by screening and preventive measures. During the influenza season 2018 - 2019, the DoD Global Respiratory Pathogen Surveillance Program (DoDGRS) received 24,300 specimens. HAdV samples that produced positive cytopathic effects in viral cultivation were subjected to next-generation sequencing for genome sequence assembly, genome typing, whole genome phylogeny, and sequence comparative analyses. Variety of HAdV types were identified in this study, including HAdV types 1 - 7, 14, 55 and 56. HAdV types 4, 7 and 14 were found in clustered cases in Colorado, Florida, New York, and South Carolina. Comparative sequence analyses of these isolates revealed the emergence of novel genetic mutations despite the stability of adenovirus genomes. Genomic surveillance of HAdV related to possible outbreaks, shed light on prevalence, genetic divergence, and viral evolution of human adenoviruses. Continued surveillance will inform risk assessment and countermeasures.

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