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Epidemiology & Infection Epidemiology & Infection

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Testing a symptom-based surveillance system at high-profile gatherings as a preparatory measure for bioterrorism

Published online by Cambridge University Press:  10 January 2003

K. OSAKA ,
H. TAKAHASHI  and
T. OHYAMA
K. OSAKA
Affiliation:
Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan Department of Population and International Health, Harvard School of Public Health, 665 Huntington Avenue, Boston, MA 02115-6021, USA
H. TAKAHASHI
Affiliation:
Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan
T. OHYAMA
Affiliation:
Infectious Disease Surveillance Center, National Institute of Infectious Diseases, Tokyo, Japan
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Abstract

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We tested symptom-based surveillance during the G8 conference in 2000 as a means of detecting outbreaks, including bio-terrorism attacks, promptly. Five categories of symptoms (skin and haemorrhagic, respiratory, gastrointestinal, neurological and unexplained) were adopted for the case definition of the surveillance. The surveillance began 1 week before the conference, and continued until 1 week after the conference ended. We could not detect any outbreaks during this surveillance. Compared to the existing diagnosis-based surveillance system, symptom-based surveillance has the advantages of timeliness and simplicity. However, poor specificity and difficulties in determining epidemic threshold were important limitations of this system. To increase the specificity of surveillance, it is essential to incorporate rapid laboratory diagnoses into the system.

Type
Research Article
Information
Epidemiology & Infection , Volume 129 , Issue 3 , December 2002 , pp. 429 - 434
Copyright
2002 Cambridge University Press
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