USA, CDC - Reported Human Infections with SOIV since 2005 (Dec. 24 2010): limited person-to-person is likely to have occurred

[Giuseppe]

USA, CDC - Seasonal Influenza (Flu) - Reported Human Infections with SOIV since 2005 (Dec. 17 2010)


[Source: US Centers for Disease Control and Prevention, full text: <cite cite="http://www.cdc.gov/flu/swineflu/soiv_cases.htm">CDC - Seasonal Influenza (Flu) - Reported Human Infections with SOIV since 2005</cite>. Edited.]

Reported Human Infections with Swine Origin Influenza Viruses (SOIV) in the United States since 2005


As of December 17, 2010, 19 cases of human infection with swine origin influenza viruses (SOIV) have been reported in the United States.

These are viruses that normally infect pigs.

Like human influenza viruses, there are different subtypes and strains of swine origin influenza viruses.

The main swine viruses circulating in U.S. pigs in recent years are swine triple reassortant (tr) H1N1 influenza virus, trH3N2 virus and trH1N2 virus.

Of the 19 human cases reported since 2005, 12 have been trH1N1 viruses, six have been trH3N2 viruses and one has been a trH1N2 virus.

All 19 persons infected with swine viruses recovered from their illness.

Twelve cases occurred in children (persons younger than 19) and 7 cases occurred in adults.

In 15 cases, exposure to swine has been identified.

No person-to-person transmission of these viruses has been documented in the investigation of these cases to date.


Related Links & Past Reports

• December 17, 2010 "Have You Heard"
• November 12, 2010 "Have You Heard"
• Information about 11 cases occurring between 2005 and 2009 can be found in the New England Journal of Medicine article entitled "Triple-Reassortant Swine Influenza A (H1) in Humans in the United States, 2005?2009" available at (LINK) (The article is a PDF.)

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[Giuseppe]

Re: USA, CDC - Seasonal Influenza (Flu) - Reported Human Infections with SOIV since 2005 (Dec. 17 2010)

US CDC - Reported Human Infections with SOIV since 2005 (Dec. 17 2010, edited)


[Source: US Centers for Disease Control and Prevention, full page: <cite cite="http://www.cdc.gov/flu/swineflu/soiv_cases.htm">CDC - Seasonal Influenza (Flu) - Reported Human Infections with SOIV since 2005</cite>. Edited.]

Reported Human Infections with Swine Origin Influenza Viruses (SOIV) in the United States since 2005

As of December 17, 2010, 19 cases of human infection with swine origin influenza viruses (SOIV) have been reported in the United States.

These are viruses that normally infect pigs.

Like human influenza viruses, there are different subtypes and strains of swine origin influenza viruses.

The main swine viruses circulating in U.S. pigs in recent years are swine triple reassortant (tr) H1N1 influenza virus, trH3N2 virus and trH1N2 virus.

Of the 19 human cases reported since 2005, 12 have been trH1N1 viruses, six have been trH3N2 viruses and one has been a trH1N2 virus.

All 19 persons infected with swine viruses recovered from their illness.

Twelve cases occurred in children (persons younger than 19) and 7 cases occurred in adults.

In 15 cases, exposure to swine has been identified.

Although no person-to-person transmission of swine influenza viruses has been laboratory confirmed in the investigation of these cases to date, some cases reported only exposure to ill persons and no exposure to live pigs.

Thus, limited person-to-person is likely to have occurred.

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[sharon sanders]

Re: USA, CDC - Reported Human Infections with SOIV since 2005 (Dec. 24 2010): limited person-to-person is likely to have occurred

I consider this a very serious event.

We now have 3 novel strains in humans. How far wide spread is novel H3N2? Who knows? But if we have found this in the US then what are the probabilities that it is elsewhere in the world? Very high.

So what is someone to do about this?

We have an initial set of recommendations:

1) This holiday season re-connect with family and friends.

2) Wash hands frequently. Bacterial infections complicate influenza illness

3) Do not kiss on the cheek as a form of greeting.

4) Contact your health practitioner to improve your general state of health. Stop smoking.

5) Stay aware of the general influenza situation in your area and the world. Use AT LEAST 2 SOURCES of information about influenza.

6) Elevated risk groups for Novel Influenza:pregnant women, people with chronic disease, anyone with respiratory illness, young adults & children need to be evaluated for their influenza risk status.

[Giuseppe]

Re: USA, CDC - Reported Human Infections with SOIV since 2005 (Dec. 24 2010): limited person-to-person is likely to have occurred

It is worth to note that with this limited human-to-human transmission of the novel A(H3N2) influenza virus of swine origin (trH3N2), the pathogen matches the requirements for a WHO increase in Pandemic Alert Phase level to three (in a scale from 0 to 6).

We are in Pandemic Alert Phase Level 3 already for A(H5N1) avian influenza virus and for the A(H7N7) avian influenza virus.

A WHO update on current trH3N2 risk assessment in anticipated.

Among the other things to do during phase 3, the selection for the vaccine seed and the subsequent manufacturing of a pilot lot of vaccines for safety and animal studies.

[sharon sanders]

Re: USA, CDC - Reported Human Infections with SOIV since 2005 (Dec. 24 2010): limited person-to-person is likely to have occurred

Thank you Ironorehopper for working on this.

[fredvries]

Re: USA, CDC - Reported Human Infections with SOIV since 2005 (Dec. 24 2010): limited person-to-person is likely to have occurred

I agree that this is potentially serious but we have to remember that the CDC reported that there were 'only' - excusez le mot - 19 human cases since 2005.