Flash Report of measles virus in Japan

      *** Please visit to the new site at http://www.nih.go.jp/niid/en/iasr-measles-e.html
              from April 2012. ***

Isolation/detection of measles virus in Japan, 2012 as of April 10, 2012
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.
Figure 1. Monthly reports of measles virus isolation/detection, 2008-2012
Figure 2. Isolation/detection of measles virus by prefecture, 2009-2012
Figure 3. Monthly isolation/detection of measles virus by prefecture, 2012
Figure 4. Monthly isolation/detection of measles virus genotype D8 by prefecture, 2012

  From January to March 2012, PHIs in Tokyo Metropolitan and 9 prefectures (Ibaraki, Tochigi,
   Chiba, Toyama, Yamanashi, Gifu, Aichi and Okayama) reported 44 measles virus isolation/detection.
*Measles viruses were detected from each age group between 0-4 years and 40-44 years.
  Both children and adults should pay attention to measles.

[Genotype D4] 4 cases; 3 cases in February and one case in March.
   In Tokyo, one case developed measles 12 days after visiting Viet Nam (3 days before
   returning home) and one domestic sporadic case in February.
   In Chiba, one domestic sporadic case in February.
   In Toyama, one case in March developed measles after returning from Pakistan.
[Genotype D8] 27 cases; 14 cases in January and 13 cases in February.
   In Chiba, 3 cases in January; one domestic case who developed measles after contact with
   a family member who developed measles in December 2011 and 2 domestic sporadic cases.
   In Tokyo, one case in January developed measles 3 days before returning from Thailand.
   In Aichi, 15 domestic sporadic cases; 5 cases in January and 10 cases in February.
   In Gifu, 3 cases in January; one domestic sporadic case and 2 family members.
   In Yamanashi, one domestic sporadic case in February.
   In Chiba, 3 cases in February; one domestic sporadic case and a family member in February
   and another domestic sporadic case. 
[Genotype D9] 8 cases; 2 cases in January, 5 cases in February and one case in March.
   In Okayama, 2 family members developed measles 10 and 18 days after returning from
   Philippines in January and 3 secondary/tertiary contact cases in February.
   In Tokyo, one domestic sporadic case in February.
   In Chiba, one domestic sporadic case in February.
   In Tochigi, one domestic case of a familial outbreak in March.
[Genotype A (vaccine type)] 5 cases; one case in February and 4 case in March.
   In Ibaraki, a measles-suspected case in February [from the specimen taken 16 days after
   MR vaccination. Rubella virus genogroup 1a (vaccine type) was simultaneously detected].
   In Chiba, a measles-suspected case in March [from the specimen taken 13 days after
   MR vaccination.
   In Yamanashi, a measles-suspected case in March [from the specimen taken 20 days after
   MR vaccination.
   In Mie, 2 measles-suspected cases in March [both from the specimen taken 12 days after
   MR vaccination.

  Isolation/detection of measles virus in Japan, 2009-2011 (February 15, 2012)
  Isolation/detection of measles virus in Japan, 2006-2008 (February 2, 2011)
Infectious Agents Surveillance Report, Infectious Disease Surveillance Center,
National Institute of Infectious Diseases

The topic of IASR
 Measles in Japan, 2011
 Measles in Japan, 2010
 Measles in Japan, 2009
 Measles in Japan, 2008
 Measles, Japan, 2006-2007
 Measles and rubella in Japan, as of March 2006
 Measles, Japan, 2001-2003
 Measles, Japan, 1999-2001
 The present status of measles in Japan as of 1998

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