Table 1. Swab samples collected in this study.
Area | Hospital/Clinic (Code) | No. of samples | “I” or “II” | Sample collection period | Remarks |
Osaka | Osaka Prefectural Institute of Public Health (OS) | 46 | “I” | May 16, 2009–May 20, 2009 | |
Osaka | National Hospital Organization Osaka National Hospital (OM) | 16 | “II” | Nov. 09, 2009–Dec 22, 2009 | *1 |
Osaka | Osaka City General Hospital (OC) | 21 | “II” | Nov. 01, 2009–Dec. 01, 2009 | |
Osaka | Higashiosaka City General Hospital (HOH) | 24 | “II” | Oct. 27, 2009–Nov. 06, 2009 | |
Osaka | Toyonaka Municipal Hospital (TY) | 18 | “II” | Dec. 02, 2009–Jan. 04, 2010 | |
Tokyo | National Center for Global Health and Medicine (KK) | 38 | “II” | Oct. 20, 2009–Jan. 06, 2010 | *2,*3 |
Chiba | Isumi Medical Center (IS) | 20 | “II” | Oct. 19, 2009–Nov. 24, 2009 | |
Chiba | Chiba Prefectural Togane Hospital (TO) | 11 | “II” | Oct. 14, 2009–Nov. 17, 2009 | |
Chiba | Takahashi Clinic (TA) | 4 | “II” | Oct. 20, 2009–Oct. 30, 2009 | |
Chiba | Sakuma Clinic (SA) | 2 | “II” | Oct. 20, 2009–Oct. 30, 2009 | |
Chiba | Okazaki Clinic (OK) | 2 | “II” | Oct. 20, 2009–Oct. 27, 2009 | |
Chiba | Matsuo Clinic (MA) | 16 | “II” | Oct. 13, 2009–Nov. 20, 2009 | |
Chiba | Ito Clinic (IT) | 3 | “II” | Oct. 13, 2009–Nov. 20, 2009 | |
Chiba | Furukawa Clinic (HU) | 2 | “II” | Oct. 22, 2009–Oct. 30, 2009 | |
Chiba | Hokushindo Sato Clinic (HO) | 18 | “II” | Oct. 20, 2009–Oct. 30, 2009 | |
Chiba | Hyuga Clinic (HI) | 7 | “II” | Oct. 13, 2009–Nov. 20, 2009 | |
Chiba | Haniya Clinic (HN) | 4 | “II” | Oct. 20, 2009–Oct. 30, 2009 | |
Chiba | Amano Clinic (AM) | 1 | “II” | Oct. 27, 2009 | |
Total | 253 |
“I”, samples collected during May 16, 2009–May 20, 2009.
“II”, samples collected during October 13, 2009–January 06, 2010.
*1, N295S and A156T mutations in NA.
*2, H275Y mutation in NA (oseltamivir-resistance, severe case).
*3, D185N mutation in NA (fatal case).