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Volume 16, Number 10—October 2010

Dispatch

Pandemic (H1N1) 2009 Virus on Commercial Swine Farm, Thailand

Donruethai Sreta, Siriporn Tantawet, Suparlark N. Na Ayudhya, Aunyaratana Thontiravong, Manoosak Wongphatcharachai, Jiradej Lapkuntod, Napawan Bunpapong, Ranida Tuanudom, Sanipa Suradhat, Linda Vimolket, Yong Poovorawan, Roongroje Thanawongnuwech, Alongkorn Amonsin, and Pravina KitikoonComments to Author 
Author affiliations: Author affiliations: Chulalongkorn University, Bangkok, Thailand (D. Sreta, S.N. Na Ayudhya, A. Thontiravong, M. Wongphatcharachai, J. Lapkuntod, N. Bunpapong, R. Tuanudom, S. Suradhat, L. Vimolket, Y. Poovorawan, R. Thanawongnuwech, A. Amonsin, P. Kitikoon); Mahidol University, Nakhon Pathom, Thailand (S. Tantawet)

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Table 2

Gene origin and percent homology of SIV RNA segments compared with pandemic (H1N1) 2009 virus, Thailand*

Influenza (H1N1) virus PB2
(1–2229)† PA
(1–2153)† NA
(1–1347)† M
(1–982)† HA
(1–1698)† NS
(1–778)† NP
(1–1443)† PB1
(1–2153)†
Pandemic (H1N1) 2009‡
Avian TRIG
Eurasian swine
Classical swine
Human TRIG
SIV from Thailand§
Eurasian swine
Classical swine
Eurasian swine
RA4
Avian TRIG
Eurasian swine
Classical swine
Human TRIG
RA9
Avian TRIG
Eurasian swine
Classical swine
Human TRIG
RA20¶
Eurasian swine
Classical swine
Eurasian swine
83.1%
85.1%
89.5%
94.2%
86.4%
90.8%
82.4%
85.1%
RA29
Avian TRIG
Eurasian swine
Classical swine
Human TRIG
RA114
Avian TRIG
Eurasian swine
Classical swine
Human TRIG
RA204¶
Eurasian swine
Classical swine
Eurasian swine
83.2%
85.2%
89.5%
94.2%
86.8%
90.8%
82.3%
85.1%
RA15
Avian TRIG
Eurasian swine
Classical swine
Human TRIG
RA75 Avian TRIG Eurasian swine Classical swine Human TRIG

*All swine influenza virus (SIV) isolates except RA20 and RA204 have >99% homology with corresponding genes of A/Nonthaburi/102/2009. PB, polymerase B; PA, polymerase A; NA, neuraminidase; M, matrix; HA, hemagglutinin; NS, nonstructural; NP, nucleoprotein; TRIG, triple reassorted internal gene.
†Nucleotide positions compared.
‡A/Nonthaburi/102/2009 (H1N1) virus.
§A/sw/Ratchaburi/NIAH1481/2000 (H1N1) virus.
¶Percent homology of compared sequences with those of corresponding genes of A/Nonthaburi/102/2009.

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