国立感染症研究所

Isolation/detection of measles virus in Japan, 2013 (as of August 1, 2013)

In Japan, Infectious Disease Surveillance Center (IDSC) of National Institute of Infectious Diseases (NIID) is notified the results of isolation/detection of infectious agents from prefectural and municipal public health institutes (PHIs).  Their information are based on the laboratory identification done by PHIs for the specimens collected at sentinel clinics/hospitals under the National Epidemiological Surveillance of Infectious Diseases (NESID), occasionally at non-sentinel sites and at health centers.
Figure 1. Monthly reports of measles virus isolation/detection, 2010-2013
Figure 2. Isolation/detection of measles virus by prefecture, 2009-2013
Figure 3. Monthly isolation/detection of measles virus by prefecture, 2012&2013
Figure 4. Monthly isolation/detection of measles virus genotype D8 by prefecture, 2012&2013
Figure 5. Age distribution of measles virus isolation/detection, 2012&2013
Figure 6. Isolation/detection of measles virus by genotype and prefecture, 2012&2013

From January to July 2013, the information of measles virus isolated/detected from 31 cases in 12 of 47 prefectures (Saitama, Chiba, Tokyo, Shizuoka, Aichi, Mie, Osaka, Hyogo, Wakayama, Okayama, Hiroshima and Fukuoka) was reported. 

[Genotype B3] One case in May.
  In Fukuoka, one case in May, developed measles 7 days after returning from Thailand.

[Genotype D8] 8 cases; 3 cases in March, 4 in April and one in May.
  In Osaka, 2 case in March, one detected from 7 days after returning from Singapore/Thailand and the other  detected from 6 days after returning from Thailand/China, two sporadic cases (travel history unknown) in March/April, and 3 famirial and sporadic cases in April/May.

[Genotype D9] 4 cases; 2 cases in March, one in April and one in May.
  In Mie, one domestic sporadic case in March.
  In Aichi, 2 domestic sporadic cases in March/April.
  In Osaka, one domestic sporadic case in May.*New

[Genotype H1] 5 cases; one case in February, 2 in March, and 2 in June.
  In Aichi, 2 case detected from one day and 5 days after returning from China in February/March.
  In Osaka, one case from measles patient developed in China in March, one case detected from 5 days after returning from China and one domestic sporadic case in June.

[Genotype A (vaccine type)] 11 cases; 2 case in January, 2 in February, 2 in March, 4 in April, and one in July.
  In Hyogo, a measles-suspected case in January (from the specimen taken 10 days after MR vaccination)
  In Chiba, a measles-suspected case in January (11 days after MR vaccination).
  In Saitama, a exanthem case in February (12 days after MR vaccination).
  In Wakayama, a measles-suspected case in February (5 days after measles vaccination).
  In Chiba, an acute encephalitis/encephalopathy case (vaccination history unknown) and a measles-suspected case in March (9 days after MR vaccination).
  In Hiroshima, a rubella-suspected case in April (13 days after MR vaccination).
  In Okayama, a measles-suspected case in April (10 days after MR vaccination).
  In Osaka, a measles-suspected case in April (20 days after measles vaccination).
  In Saitama, a measles-suspected case in April (10 days after MR vaccination).
  In Shizuoka, a measles-suspected case in July (11 days after MR vaccination).

 [Genotype not typed] 2 cases; 2 cases in March.
  In Tokyo, 2 detected from exanthem patients, both has MR vaccination history (10 days and 16 days before specimen collection).

 

Infectious Agents Surveillance Report, Infectious Disease Surveillance Center,
National Institute of Infectious Diseases

Copyright 1998 National Institute of Infectious Diseases, Japan

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