Volume 17, Number 6—June 2011
Letter
Swine Influenza Virus A (H3N2) Infection in Human, Kansas, USA, 2009
Table
Hemagglutination inhibition assay titers for 3 influenza strains from swine exhibited at county fair, by date of blood draw, Kansas, 2009*
Swine ID no. | August 7 titers |
August 31 titers |
||||
---|---|---|---|---|---|---|
Subtype H1N1† | Subtype H3N2‡ | “County fair,” subtype H3N2§ | Subtype H3N2‡ | “County fair,” subtype H3N2§ | ||
1 | <10 | 20 | 320 | ¶ | ¶ | |
2 | <10 | 10 | 160 | ¶ | ¶ | |
3 | <10 | 40 | 640 | ¶ | ¶ | |
4 | <10 | 40 | 640 | ¶ | ¶ | |
5 | <10 | 80 | 640 | ¶ | ¶ | |
6 | <10 | 40 | 640 | ¶ | ¶ | |
7 | <10 | 320 | 640 | ¶ | ¶ | |
8 | 10 | 10 | 160 | ¶ | ¶ | |
9 | <10 | 80 | 640 | ¶ | ¶ | |
10 | <10 | 40 | 320 | <10 | 80 | |
11 | <10 | 80 | 320 | 10 | 320 | |
12 | <10 | 20 | 160 | 20 | 80 | |
13 | 10 | <10 | 40 | ¶ | ¶ |
*HI, hemagglutination inhibition; ID, identification.
†Strain A/Swine/Iowa/79 (H1N1).
‡Strain A/Swine/Texas/98 (H3N2).
§Strain A/Kansas/13/2009 (H3N2).
¶Ten of the original 13 swine were slaughtered before convalescent-phase serum could be collected.