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Avian Flu Outbreaks in North America

Updated: Thursday, May 25, 2017 3:41 AM EDT
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Avian Flu Outbreaks in North America

Recent North American Outbreaks of Avian Influenza with Transmission to Humans

H7N3 in Canada – 2004

On February 19, 2004 , the Canadian Food Inspection Agency announced an outbreak of avian influenza A (H7N3) in poultry in the Fraser Valley region of British Columbia . Culling operations and other measures were performed in an effort to control the spread of the virus. Health Canada reported two cases of laboratory-confirmed influenza A (H7): one in a person involved in culling operations on March 13-14, and the other in a poultry worker who had close contact with poultry on March 22-23. Both patients developed conjunctivitis (eye infection) and other flu-like symptoms. Their illnesses resolved after treatment with the antiviral medication oseltamivir.

Although these are the only laboratory-confirmed cases of avian influenza A (H7) in humans during this outbreak in Canada , approximately 10 other poultry workers exhibited conjunctival and/or upper respiratory symptoms after having contact with poultry. Use of personal protective equipment is mandatory for all persons involved in culling activities, and compliance with prescribed safety measures is monitored. Epidemiologic, laboratory, and clinical evaluation is ongoing, as is surveillance for signs of avian influenza in exposed persons. There is currently no evidence of person-to-person transmission of avian influenza from this outbreak.

H7N2 in New York – 2003

In November 2003, a patient with serious underlying medical conditions was admitted to a hospital in New York with respiratory symptoms. One of the initial laboratory tests identified an influenza A virus that was thought to be H1N1. The patient recovered and went home after a few weeks. Subsequent confirmatory tests conducted in March showed that the patient had been infected with an H7N2 avian influenza A virus.

Recent Outbreaks among Poultry in the United States with No Transmission to Humans

H5N2 in Texas – 2004

In February 2004, an outbreak of highly pathogenic avian influenza (HPAI) A (H5N2) was detected and reported in a flock of 7,000 chickens in south-central Texas . This was the first outbreak of HPAI in the United States in 20 years.

H7N2 in Delaware, New Jersey, and Maryland – 2004

In February 2004, an outbreak of low pathogenic avian influena (LPAI) A (H7N2) was reported on 2 chicken farms in Delaware and in four live bird markets in New Jersey supplied by the farms. In March 2004, surveillance samples from a flock of chickens in Maryland tested positive for LPAI H7N2. It is likely that this was the same strain.

This article is based on information gathered at the CDC (Center For Disease Control).

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23 May 2017 at 11:00pm
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23 May 2017 at 11:00pm
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23 May 2017 at 1:49pm
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23 May 2017 at 1:49pm
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23 May 2017 at 6:11am
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22 May 2017 at 9:03am
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22 May 2017 at 9:03am
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21 May 2017 at 3:35am
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21 May 2017 at 3:35am
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20 May 2017 at 11:23am
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20 May 2017 at 11:23am
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19 May 2017 at 12:28pm
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17 May 2017 at 11:18am
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17 May 2017 at 11:18am
Bird flu Poultry restrictions lifted in Nottinghamshire - Newark Advertiser
16 May 2017 at 2:00am
Bird flu Poultry restrictions lifted in Nottinghamshire - Newark Advertiser
16 May 2017 at 2:00am
Bird flu restrictions lifted in north and west Cumbria - News & Star
14 May 2017 at 4:20pm
Bird flu restrictions lifted in north and west Cumbria - News & Star
14 May 2017 at 4:20pm
Report: US unready for bird flu - Arkansas Online
14 May 2017 at 12:17am
Report: US unready for bird flu - Arkansas Online
14 May 2017 at 12:17am
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12 May 2017 at 6:22am
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12 May 2017 at 6:22am
US falling short on bird flu preparation, report finds - CNN
12 May 2017 at 5:15am
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12 May 2017 at 5:15am
China H7N9 bird flu death toll fell to 24 in April: health authority - Reuters
11 May 2017 at 8:22pm
China H7N9 bird flu death toll fell to 24 in April: health authority - Reuters
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Two bird flu cases confirmed in the UK - Irish Independent
8 May 2017 at 6:42am
Two bird flu cases confirmed in the UK - Irish Independent
8 May 2017 at 6:42am
Chickens culled as bird flu found at second Lancashire farm - BBC News
7 May 2017 at 4:20am
Chickens culled as bird flu found at second Lancashire farm - BBC News
7 May 2017 at 4:20am