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Reporting

Data and Statistics

Influenza A Variant Viruses (H3N2v, H1N1v)


Influenza viruses that normally circulate in pigs are called "variant" viruses when they are found in people. In 2011, a small number of humans was found to be infected with an influenza A H3N2v virus in the United States. Since 2011, sporadic cases cases of H3N2v and H1N1v have been reported anually in the United States. A majority of these cases has occured during summer months, associated with contact with swine at fair environments.

 

For 2016, New Jersey identified one person sick with influenza A H1N1 variant virus (H1N1v) in January. This person did not work with swine as part of their occupation, but had visited a swine barn shortly before their illness.

 

No cases of varient influenza have ever been identified in North Dakota. On July 31, 2014 it was reported that three pigs at the 2014 North Dakota State Fair had been removed for illness and had tested positive for an H3N2 virus. The North Dakota Department of Agriculture put out the following news release: Precautions advised regarding influenza (link). No cases of human infection related to contact with these animals or their environs at the State Fair have been discovered. The North Dakota Department of Health asks that anyone who becomes sick with influenza-like illness (fever, sore throat, coughing, etc.) after coming in contact with swine or swine environments, such as pig barns, should mention the exposure to their doctor if they seek medical treatment.

 

Medical providers should contact the North Dakota Department of Health, Division of Disease Control when patients are being evaluated for variant influenza. Possible variant influenza is considered novel influenza, and is immediately notifiable via telephone. In addition, providers should be aware commercial influnza test kits, including commercial molecular methodologies used at large hospitals, are not reliable at detecting variant influenza. A laboratory negative for seasonal influenza SHOULD NOT be used to rule out novel influenza.


 

On this page:
redbullet Prevention Information
redbullet Guidance Documents
redbullet Information for Specific Groups
redbullet H3N2v News
 
Prevention Information
This section provides information and links to resources that can be used to help prevent the spread of H3N2v influenza.
 
Reduce and prevent the spread of influenza between people by practicing the following:

Cover your nose and mouth when coughing or sneezing

Wash your hands

Do not touch your eyes, nose or mouth

Stay home if you are sick

 
Reduce and prevent the spread of influenza between people and pigs by practicing the following:

Don't eat, drink, or put items in your mouth in areas with pigs

Don't take toys, pacifiers, cups, baby bottles, strollers, or similar items into areas with pigs

Wash your hands before and after contact with pigs

Avoid close contact with pigs that appear ill

Avoid contact with pigs if you are sick with influenza or influenza-like illness

 
CDC Recommendations for People at High Risk:

If you are at high risk of serious flu complications and are going to a fair where pigs will be present, avoid pigs and swine barns at the fair this year. This includes children younger than 5 years, people 65 years and older, pregnant women, and people with certain long-term health conditions (such as asthma, diabetes, heart disease, weakened immune systems, and neurological or neurodevelopmental conditions).

 
» Prevention Information for the Public (CDC link)
 
Guidance Documents
The links below provide background information, guidance documents, and other resources for healthcare professionals, schools and other partners to use regarding H3N2v influenza.
 
» Healthcare Providers (CDC link)
» Public Health and Laboratories (CDC link)
» School Guidance (CDC link)
» Fair Guidance (CDC link)
 
Information for Specific Groups
The information provided in the links below can help prevent illnesses associated with animals in public settings.
 
» Information for Fair Participants (CDC link)
» Information for Fair Managers and Exhibitors (CDC link)
» Information for People Raise Pigs (CDC link)
 
H3N2v News
 
» CDC News and Highlights for H3N2v (CDC link)
 
 





North Dakota Data:

There have been no variant human influenza infections reported in North Dakota.