Volume 17, Number 10—October 2011
Dispatch
Seroconversion to Pandemic (H1N1) 2009 Virus and Cross-Reactive Immunity to Other Swine Influenza Viruses
Ranawaka A.P.M. Perera, Steven Riley, Siu K. Ma, Hua-Chen Zhu, Yi Guan, and Joseph S.M. Peiris
Table
Seroprevalence and GMT for swine influenza viruses of H1 subtype in prepandemic and postpandemic serum specimens from 28 persons who seroconverted for pandemic (H1N1) 2009, Hong Kong*
| Virus | Virus abbreviation | Virus lineage (abbreviation) | No. (%) seroconverters† |
GMT |
|||
|---|---|---|---|---|---|---|---|
| Prepandemic | Postpandemic | Prepandemic | Postpandemic | ||||
| A/California/4/2009 (H1N1) | Cal4 | Pandemic (Pdm) | 0 | 28 (100) | 10.77 | 107.7 | |
| A/Swine/HK/4167/1999 (H1N1) | Sw4167 | Classical swine (CS) | 6 (21) | 26 (93) | 17.24 | 121.9 | |
| A/Swine/HK/1304/2003 (H1N?) | Sw1304 | Classical swine reassortant (CSr) | 7 (25) | 24 (86) | 16.41 | 105 | |
| A/Swine/HK/1110/2006 (H1N2) | Sw1110 | Triple reassortant (TRIG) | 2 (7) | 21 (75) | 13.13 | 44.16 | |
| A/Swine/HK/NS29/2009 (H1N1) | SwNS29 | Eurasian avian-like (EA) | 2 (7) | 13 (46) | 12.50 | 30.46 | |
| A/Swine/HK/1559/2008 (H1N1) | Sw1559 | Eurasian avian-like reassortant (EAr) | 2 (7) | 16 (57) | 12.81 | 41.00 | |
| A/Swine/G/112/2007 (H1N1) | Sw112 | Eurasian avian-like (EA) | 0 (0) | 3 (11) | 10.25 | 13.13 | |
| A/Swine/HK/201/2010 (H1N1) | Sw201 | TRIG reassortant (TRIGr) | 3 (11) | 21 (75) | 12.2 | 48.76 | |
| A/HK/400599/2008 (H1N1) | 400599 | Seasonal influenza | 12 (43) | 12 (43) | 38.07 | 40.00 | |
*GMT, geometric mean titer.
†Seroconverters were persons with antibody titer >40.
