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. 2010 Sep;91(Pt 9):2314–2321. doi: 10.1099/vir.0.021402-0

Table 3.

Combinations of internal gene segments of viruses isolated from the lungs of co-infected pigs

Virus subtype Combination of viral internal gene segments
TRIG cassette* Modified TRIG cassette† Other combination
rH1N1 (39) 10 8 21
H1N2 (10) 4 4 2
H3N1 (11) 6 1 4
H3N2 (11) 10 0 1

*TRIG cassette: six internal genes (PB1, PB2, PA, NP, M and NS) derived from the H3N2 Tx/98 virus in this study.

†Modified TRIG cassette: five internal genes (PB1, PB2, PA, NP and NS) derived from the H3N2 Tx/98 virus and the M gene from the IA/30 virus in this study.