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Disease Name: Influenza (Flu)


Quick Links

Please review the Idaho Reportable Disease Rules (IDAPA 16.02.10) for the most up-to-date information.

Influenza (Flu): http://www.cdc.gov/flu/


Overview / Case Definition

The flu is a contagious respiratory illness caused by influenza viruses that infect the nose, throat, and lungs. It can cause mild to severe illness and at times can lead to death. The best way to prevent the flu is by getting a flu vaccine each year.

Evidence of a positive influenza test by at least one of the following methods:


Restrictions

None


Reporting

Optional to the State Epidemiologist 

Outbreaks in Institutional settings are encouraged to assist in containment efforts to your local health department.

Reportable by Healthcare and Labs:

Reportable by Food Service Facility:

Suspect Reportable:

Reporting Timeframe: Optional to the State Epidemiologist Outbreaks in Institutional settings are encouraged to assist in containment efforts to your local health department.



Diagnosis / Testing

Influenza Virus Testing Methods

Method

Types Detected

Acceptable Specimens

Test Time

CLIA Waived

Viral tissue cell culture (conventional; yields live virus)

 

A and B

 

NP swab, throat swab, NP or bronchial wash, nasal or endotracheal aspirate, sputum

 

3-10 days

 

No

 

Rapid cell culture (shell vials; cell mixtures; yields live virus)

 

A and B

 

As above

 

1-3 days

 

No

 

Immunofluorescence, Direct (DFA) or Indirect (IFA) Florescent Antibody Staining [antigen detection]

 

A and B

 

NP swab or wash, bronchial wash, nasal or endotracheal aspirate

 

1-4 hours

 

No

 

RT-PCR (singleplex and multiplex; real-time and other RNA-based) and other molecular assays [influenza viral RNA or nucleic acid detection]

 

A and B

 

NP swab, throat swab, NP or bronchial wash, nasal or endotracheal aspirate, sputum

 

Varies (Generally 60 minutes - 8 hours)

 

No

 

Rapid Molecular Assay [influenza viral RNA or nucleic acid detection]

 

A and B

 

NP swab, nasal aspirate, wash, swab

 

<30 minutes

 

Yes/No

 

Rapid Influenza Diagnostic Tests (antigen detection)

 

A and B

 

NP swab, (throat swab), nasal wash, nasal aspirate

 

<30 minutes

 

Yes/No

 


Treatment

CDC Guidance on Influenza Antiviral Chemoprophylaxis of Persons Exposed to Birds with Avian Influenza:
http://www.cdc.gov/flu/avianflu/guidance-exposed-persons.htm

Avian Influenza - Information for Health Professionals and Laboratorians: http://www.cdc.gov/flu/avianflu/healthprofessionals.htm


Additional Information

Influenza (Flu): http://www.cdc.gov/flu/


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