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All issues > Volume 52(8); 2009

Review Article
Korean J Pediatr. 2009;52(8):862-868. Published online August 15, 2009.
Novel swine-origin H1N1 influenza
Jina Jn Lee1, Hoan Jong HJ Lee1
1Department of Pediatrics, Seoul National University Children`s Hospital, Seoul, Korea
Correspondence Hoan Jong HJ Lee ,Email: hoanlee@snu.ac.kr
Abstract
Since its identification in April 2009, a swine-origin H1N1 influenza A virus (S-OIV) which is a reassortment of gene segments from both North American triple-reassortant and Eurasian swine influenza has been widely spread among humans in unexpected rapidity. To date, each gene segment of the 2009 influenza A (H1N1) outbreak viruses have shown high (99.9%) neucleotide sequence identity. As of July 6, 94,512 people have been infected in 122 countries, of whom 429 have died with an overall case-fatality rate of <0.5%. Most confirmed cases of S-OIV infection have been characterized by self-limited, uncomplicated febrile respiratory illness and 38% of cases have also included vomiting or diarrhea. Standard plus droplet precautions should be adhered to at all times. Tests on S-OIV have indicated that current new H1N1 viruses are sensitive to neuraminidase inhibitors (oseltamivir). However, current less virulent S-OIV may evolve into a pathogenic strain or acquire antiviral resistance, potentially with more severe clinical consequences. Efforts to control these outbreaks would be based on our understanding of novel S-OIV and previous influenza pandemics.

Keywords :Novel swine-origin H1N1 influenza, S-OIV, Pandemic, Vaccine

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