Case Definitions:
Influenza-Like Illness (ILI)
(Seasonal
and H1N1 Novel Influenza)
Updated 9/23/09
On this page:
Definition: ILI
H1N1 Confirmed Case Definition
H1N1 Probable Case Definition
H1N1 Suspect Case Definition
Definition: Influenza-Like Illness (ILI)
- Documented fever >37.8°C (>100°F) AND cough and/or sore throat in the absence of another cause
H1N1 Confirmed Case Definition:
- A confirmed case is defined as a person with influenza-like illness (ILI) and laboratory-confirmed novel influenza A (H1N1) infection by one or more of the following tests:
- Real-time RT-PCR
- Viral culture
H1N1 Probable Case Definition:
- A probable case is defined as
a person who meets the suspect case definition and who is positive for influenza A, but negative for H1 and H3 by influenza RT-PCR.
H1N1 Suspect Case Definition:
| 
