Genotyping and screening of reassortant live-attenuated influenza B vaccine strain

Eun Young Lee, Kwang Hee Lee, Eun Ju Jung, Yo Han Jang, Sang Uk Seo, Hyun Ah Kim, Baik Lin Seong

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Live-attenuated influenza virus vaccines can be generated by reassortment of gene segments between an attenuated donor strain and a virulent wild-type virus. The annual production schedule for the seasonal influenza vaccine necessitates rapid and efficient genotyping of the reassorted progeny to identify the desired vaccine strains. This study describes a multiplex RT-PCR system capable of identifying each gene segment from the cold-adapted attenuated donor virus, B/Lee/40ca. The specificity of the amplification system was optimized by testing various wild-type influenza B viruses. The resulting RT-PCR method is sensitive and efficient enough for routine identification of reassortant clones to identify the desired gene constellation, consisting of six segments from the attenuated donor virus and the H and N genes from the wild-type virus. By providing a more rapid and efficient means of genotyping the candidate reassortant strains, this method could be implemented to expedite the generation of each component strain and allow more time to culture and process the final seasonal influenza vaccine.

Original languageEnglish
Pages (from-to)133-138
Number of pages6
JournalJournal of Virological Methods
Issue number2
Publication statusPublished - 2010 May

Bibliographical note

Funding Information:
This work was supported by a contract research grant from the Korea Food and Drug Administration (KFDA) ( 06092-KFDA346 ), a grant from the Ministry of Health, Welfare, and Family Affairs ( A085105 ) from the Korean Government, and from Biotrion Co., Seoul, Korea .

All Science Journal Classification (ASJC) codes

  • Virology


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