TABLE 1

Number and percentage of outbreaks by genotype and by year

Genotype (year)No. (%) of outbreaksTotal no. (%) of outbreaks
2013–20142014–20152015–2016
GI.12 (0.2)4 (0.4)1 (0.1)7 (0.3)
GI.213 (1.2)43 (4.7)8 (1.1)64 (2.4)
GI.3181 (16.7)36 (4.0)24 (3.3)241 (8.9)
GI.43 (0.3)1 (0.1)2 (0.3)6 (0.2)
GI.54 (0.4)17 (1.9)51 (7.1)72 (2.7)
GI.620 (1.9)5 (0.6)3 (0.4)28 (1.0)
GI.74 (0.4)1 (0.1)0 (0.0)5 (0.2)
GI.92 (0.2)0 (0.0)2 (0.3)4 (0.2)
GII.15 (0.5)5 (0.6)29 (4.0)39 (1.4)
GII.221 (1.9)12 (1.3)90 (12.5)123 (4.5)
GII.342 (3.9)6 (0.7)50 (6.9)98 (3.6)
GII.4 Den Haag (2006)1 (0.1)1 (0.1)0 (0.0)2 (0.1)
GII.4 New Orleans (2009)2 (0.2)0 (0.0)0 (0.0)2 (0.1)
GII.4 Sydney (2012)595 (54.9)641 (70.4)338 (46.8)1,574 (58.0)
GII.515 (1.4)0 (0.0)0 (0.0)15 (0.6)
GII.642 (3.9)94 (10.3)11 (1.5)147 (5.4)
GII.744 (4.1)10 (1.1)4 (0.6)58 (2.1)
GII.81 (0.1)3 (0.3)0 (0.0)4 (0.2)
GII.100 (0.0)1 (0.1)3 (0.4)4 (0.2)
GII.121 (0.1)0 (0.0)0 (0.0)1 (0.0)
GII.1358 (5.4)0 (0.0)13 (1.8)71 (2.6)
GII.1410 (0.9)1 (0.1)3 (0.4)14 (0.5)
GII.151 (0.1)0 (0.0)0 (0.0)1 (0.0)
GII.173 (0.3)19 (2.1)75 (10.4)97 (3.6)
GII.251 (0.1)0 (0.0)0 (0.0)1 (0.0)
GIV0 (0.0)0 (0.0)1 (0.1)1 (0.0)
Mixed12 (1.1)10 (1.1)14 (1.9)36 (1.3)
Total1,083 (100.0)910 (100.0)722 (100.0)2,715 (100.0)