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. 2013 Feb 28;8(2):e57576. doi: 10.1371/journal.pone.0057576

Table 2. Swine and human influenza viruses: HI antigenic characterization of H1 strains.

HI titer of serum against:
Virus origin Virus strain A/Sw/It/114347–1/06 (H1N2)* A/Sw/It/125746/05 (H1N1)* A/Brisbane/59/07 (H1N1)* A/California/7/09 (H1N1)**
Swine A/Sw/It/114347-1/06, H1N2 80 <10 <10 <10
Swine A/Sw/It/125746/05, H1N1 <10 1280 10 80
A/Sw/It/66732/2/06, H1N1 <10 1280 <10 320
A/Sw/It/87491/06, H1N1 <10 1280 <10 160
A/Sw/It/45894/2/07, H1N1 <10 640 <10 160
A/Sw/It/68030/07, H1N1 <10 640 <10 160
A/Sw/It/232868/07, H1N1 <10 1280 <10 320
A/Sw/It/207871/08, H1N1 <10 640 <10 160
A/Sw/It/44795/08, H1N1 <10 640 <10 160
Human A/Brisbane/59/07, H1N1 10 20 1280 <10
A/California/7/09, H1N1 <10 160 <10 1280

HI, Haemagglutination inhibition.

*

Chicken hyperimmune antiserum.

**

Ferret post-infection antiserum.

Virus strains used to test swine workers’ and controls’ sera are underlined.

SIVs strains isolated from pigs, in the farms under study.