Influenza B Virus in Seals

Author:

Osterhaus A. D. M. E.12,Rimmelzwaan G. F.1,Martina B. E. E.2,Bestebroer T. M.1,Fouchier R. A. M.1

Affiliation:

1. National Influenza Center, Department of Virology, Erasmus University, Doctor Molewaterplein 50, 3015 GE Rotterdam, Netherlands.

2. Seal Rehabilitation and Research Center, Hoofdstraat 94a, 9968 AG Pieterburen, Netherlands.

Abstract

Influenza B virus is a human pathogen whose origin and possible reservoir in nature are not known. An influenza B virus was isolated from a naturally infected harbor seal ( Phoca vitulina ) and was found to be infectious to seal kidney cells in vitro. Sequence analyses and serology indicated that influenza virus B/Seal/Netherlands/1/99 is closely related to strains that circulated in humans 4 to 5 years earlier. Retrospective analyses of sera collected from 971 seals showed a prevalence of antibodies to influenza B virus in 2% of the animals after 1995 and in none before 1995. This animal reservoir, harboring influenza B viruses that have circulated in the past, may pose a direct threat to humans.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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