国立感染症研究所

 In Japan, prefectural and municipal public health institutes (PHIs) report isolation/detection of infectious agents from specimens collected by sentinel clinics and hospitals under the National Epidemiological Surveillance of Infectious Diseases, other medical institutions and health centers (Reference figure).
Figure 1. Weekly reports of influenza virus isolation/detection, week 36/2012-week 3/2013
Figure 2. Isolation/detection of influenza virus by prefecture, week 36/2012-week 3/2013
Figure 3. Weekly isolation/detection of influenza virus by prefecture, weeks 50/2012-2/2013

  From the beginning of 2012/13 season (from week 36/September of 2012 to week 35/August of 2013), isolations/detections of influenza virus AH3 was dominantly reported and the report increased from week 47 (November 19-25) (Fig. 1). 

  In the 2012/13 season, from week 36 (September 3-9, 2012) to week 3 (January 14-20, 2013), isolations/detections of AH1pdm09 from 25 cases in 12 prefectures, AH3 from 515 cases in 40 prefectures, B/Victoria lineage from 21 cases in 4 prefectures, B/Yamagata lineage from 16 cases in 6 prefectures and B/lineage not determined from 9 cases in 7 prefectures were reported (Fig. 2). 

From week 50 (December 10-16) of 2012 to week 2 (January 7-13) of 2013  (as of January 17, 2013)

  During five weeks from week 50 of 2012 to week 2 of 2013, isolations/detections of AH1pdm09 from 10 cases in 4 prefectures, AH3 from 266 cases in 31 prefectures, B/Victoria lineage from 8 cases in 3 prefectures, B/Yamagata lineage from 6 cases in 4 prefectures and B/lineage not determined from 4 cases in 3 prefectures were reported (Fig. 3).

 

[Reference figure] Weekly cases of influenza and isolation/detection of influenza viruses from week 36 of 2008 to week 41 of 2011

Isolation/detection of influenza virus in Japan, from week 36 (September 5-11) of 2011 to week 25 (June 18-24) of 2011 (as of July 19, 2012)
Isolation/detection of influenza virus in Japan, from week 36 (September 6-12) of 2010 to week 19 (May 9-15) of 2011 (as of September 6, 2011)
Isolation/detection of influenza virus in Japan, from week 19 (May 4-10) of 2009 to week 19 (May 10-16) of 2010 (as of May 13, 2010)
Infectious Agents Surveillance Report, Infectious Disease Surveillance Center, 
National Institute of Infectious Diseases
 

Copyright 1998 National Institute of Infectious Diseases, Japan

Top Desktop version