Research Article
Molecular Epidemiology of Human Norovirus in Korea in 2013
Table 2
Norovirus antigen positivity and GII.4 strain frequencies by month.
| | Date | Number (No.) of specimens tested | Number (%) of norovirus antigen-positive specimens | Number of genotyped specimens | Number (%) of GII.4 strains of genotyped specimens | Number (%) of GII.4 Sydney 2012 strains of genotyped specimens |
| | Jan. 2013 | 225 | 53 (23.6%) | 33 | 25 (75.8%) | 22 (66.7%) | | Feb. | 300 | 38 (12.7%) | 28 | 19 (67.9%) | 14 (50.0%) | | Mar. | 252 | 27 (10.7%) | 17 | 8 (47.1%) | 7 (41.2%) | | Apr. | 256 | 16 (6.3%) | 10 | 3 (30.0%) | 3 (30.0%) | | May | 247 | 11 (4.5%) | 2 | 1 (50.0%) | 1 (50.0%) | | Jun. | 218 | 6 (2.8%) | 1 | 0 (0%) | 0 (0%) | | Jul. | 237 | 5 (2.1%) | 2 | 0 (0%) | 0 (0%) | | Aug. | 225 | 4 (1.8%) | 1 | 1 (100%) | 1 (100%) | | Sep. | 260 | 11 (4.2%) | 8 | 8 (100%) | 7 (87.8%) | | Oct. | 138 | 8 (5.8%) | 5 | 3 (60.0%) | 3 (60.0%) | | Nov. | 284 | 62 (21.8%) | 49 | 47 (95.9%) | 47 (95.9%) | | Dec. | 338 | 108 (32.0%) | 74 | 62 (83.4%) | 59 (79.7%) | | Total | 2,980 | 349 (11.7%) | 230 | 177 (77.0%) | 164 (71.3%) |
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