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 Kitikoon
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.
