Triple Reassortant Swine Influenza A (H3N2) Virus in Waterfowl

EID Journal Home > Volume 16, Number 4–April 2010

Volume 16, Number 4–April 2010
Letter
Triple Reassortant Swine Influenza A (H3N2) Virus in Waterfowl
Muthannan A. Ramakrishnan, Ping Wang, Martha Abin, My Yang, Sagar M. Goyal, Marie R. Gramer, Patrick Redig, Monte W. Fuhrman, and Srinand Sreevatsan
Author affiliations: University of Minnesota, St. Paul, Minnesota, USA (M.A. Ramakrishnan, P. Wang, M. Abin, M. Yang, S.M. Goyal, M.R. Gramer, P. Redig, S. Sreevatsan); and Sioux Nation Agriculture Center of Sioux Falls, Sioux Falls, South Dakota, USA (M.W. Fuhrman)

Suggested citation for this article

To the Editor: In 1998, a new lineage of triple reassortant influenza A (H3N2) virus (TR-H3N2) with genes from humans (hemmaglutinin [HA], neuraminidase [NA], and polymerase basic 1 [PB1]), swine (matrix [M], nonstructural [NS], and nucleoprotein [NP]), and birds (polymerase acidic [PA] and PB2) emerged in the U.S. swine population. Subsequently, similar viruses were isolated from turkeys (1,2), minks, and humans in the United States and Canada (3,4). In 2007, our national influenza surveillance resulted in isolation of 4 swine-like TR-H3N2 viruses from migratory waterfowl (3 from mallards [Anas platyrrhynchos] and 1 from a northern pintail [Anas acuta] of 266 birds sampled) in north-central South Dakota. We report on the characterization of these TR-H3N2 viruses and hypothesize about their potential for interspecies transmission.

Suggested Citation for this Article
Ramakrishnan MA, Wang P, Abin M, Yang M, Goyal SM, Gramer MR, et al. Triple reassortant swine influenza A (H3N2) virus in waterfowl [letter]. Emerg Infect Dis [serial on the Internet]. 2010 Apr [date cited]. http://www.cdc.gov/EID/content/16/4/728.htm

DOI: 10.3201/eid1604.091583

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