Infectious Disease Sureillance Center

IDWRNovel Influenza A(H1N1) (11 May 2009)

Situation Update of identified cases and responses in Japan-3

May 11, 2009

According to the announcement from Minister of Health, Labour and Welfare on 11th May, all four laboratory confirmed cases are in recovery phase. All those under 10-days medical surveillance, 32 of high school group members, 14 passengers and 2 crews, are in good health until today (Day 4). Follow up of the remaining passengers of NW 25 is almost completed. Regional governments are overseeing health conditions of 164 passengers contacted, and three none Japanese nationals remained for search. The Ministry also extended contact tracing to 10 passengers of close contact to the first case identified in China. Health monitoring request of shall be limited to close contact only.

As of 11th May 2009, medical condition of four confirmed cases are reported as follows; teacher of the high school received medication and fever dropped to 37℃ with mild cough, one male student identified with fever on arrival also received medication and fever dropped to 36.4℃, the symptom of the second student (cough with sputa) is also resolving. The fourth case identified on 10th May, reported of high fever during medical surveillance, also received medication and fever dropped to 36.7℃ with slight redness of throat. No death or critically ill case or confirmed case outside this high school group has reported until today.

Report from the National surveillance

As of 11th May, 1:00 UTC/GMT, the national case-based early reporting surveillance received 15 suspected influenza A (H1N1) cases. Results of laboratory diagnostic test at either Regional Public Health Laboratories or the National Institute of Infectious Diseases (NIID) were all negative, excluding the last two cases waiting for the confirmations. Those identified at the port of entry by Quarantine Stations are not included in this system, because the cases prior to the immigration clearance are reported separately through the quarantine system under Japanese regulations.

Revision of surveillance on suspected cases is requested in preparation for the future to generate useful and collated information for timely public health response.

(2009/5/13 IDSC)

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