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This document, released February 18, 2019, focuses on several key areas related to syndrome definition creation, including the basics behind a syndrome definition, steps to build a syndrome, evaluation of a new (or old) definition, and dissemination.

Starting in November of 2016, the ISDS... Read more

Content type: References

In June 2009, the CDC defined a confirmed case of H1N1 as a person with an ILI and laboratory confirmed novel influenza A H1N1 virus infection. ILI is defined by the CDC as fever and cough and/or sore throat, in the absence of a known cause other than influenza. ILI cases are usually reported... Read more

Content type: Abstract

Emerging event detection is the process of automatically identifying novel and emerging ideas from text with minimal human intervention. With the rise of social networks like Twitter, topic detection has begun leveraging measures of user influence to identify emerging events. Twitter's highly... Read more

Content type: Abstract

The Centers for Disease Control and Prevention case definition of influenza-like illness (ILI) as fever with cough and/or sore throat casts a wide net resulting in lower sensitivity which can have major implications on public health surveillance and response.



... Read more

Content type: Abstract

Tracking emergency department (ED) asthma visits is an important part of asthma surveillance, as ED visits can be preventable and may represent a failure of asthma control efforts. When using limited clinical ED datasets for secondary purposes such as public health surveillance, it is important... Read more

Content type: Abstract

The objective of this report is to describe the variation of symptoms being detected as respiratory or influenza-like illness (ILI) syndrome using nurse advice call center (NACC) data and emergency department (ED) chief complaint data compared to laboratory data from one hospital.

Content type: Abstract

To determine sensitivity and specificity of syndromic surveillance of influenza based on data from SOS Medecins, a healthcare network of emergency general practitioners (GP) in Bordeaux, France.

Content type: Abstract

The Veterans Health Administration (VHA) operates over 880 outpatient clinics across the nation. The Johns Hopkins Applied Physics Laboratory’s Electronic Surveillance System for the Early Notification of Community-Based Epidemics (ESSENCE) utilizes VHA ICD9 coded outpatient visit data for the... Read more

Content type: Abstract


The mission of the Syndrome Definition Committee (SDC) is to create, evaluate, and refine syndrome definitions, link users with similar syndrome definition needs, and create documentation along the way. We seek to be a resource for collaboration and best practices in the syndrome... Read more

Content type: Meeting Recordings & Notes

The CDC recently developed sub-syndromes for classifying disease to enhance syndromic surveillance of natural outbreaks and bioterrorism. They have developed ICD9 classifiers for six GI Illness subsyndromes: Abdominal Pain, Nausea and Vomiting, Diarrhea, Anorexia, Intestinal infections, and Food... Read more

Content type: Abstract


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