Influenza A virus subtype H7N3 (A/H7N3) is a subtype of the species

Influenza A virus ''Influenza A virus'' (''IAV'') causes influenza in birds and some mammals, and is the only species of the genus ''Alphainfluenzavirus'' of the virus family ''Orthomyxoviridae''. Strain (biology)#Microbiology or virology, Strains of all subtypes ...

(sometimes called

bird flu "Bird Flu" is an urumee melam-dance song by recording artist M.I.A. on her second studio album '' Kala'' (2007). It was released as a digital download in 2006 through XL Recordings under exclusive license to Interscope Records in the US. Cr ...

virus). In

North America North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...

, the presence of H7N3 was confirmed at several poultry farms in

British Columbia British Columbia (commonly abbreviated as BC) is the westernmost province of Canada, situated between the Pacific Ocean and the Rocky Mountains. It has a diverse geography, with rugged landscapes that include rocky coastlines, sandy beaches, ...

in February 2004; flocks were culled to halt the spread of the virus. Two humans, both poultry workers, were infected and had symptoms including

conjunctivitis Conjunctivitis, also known as pink eye, is inflammation of the conjunctiva, outermost layer of the white part of the eye and the inner surface of the eyelid. It makes the eye appear pink or reddish. Pain, burning, scratchiness, or itchiness may ...

and mild

influenza Influenza, commonly known as "the flu", is an infectious disease caused by influenza viruses. Symptoms range from mild to severe and often include fever, runny nose, sore throat, muscle pain, headache, coughing, and fatigue. These symptoms ...

-like illness. Both fully recovered and were treated with

oseltamivir Oseltamivir, sold under the brand name Tamiflu, is an antiviral medication used to treat and prevent influenza A and influenza B, viruses that cause the flu. Many medical organizations recommend it in people who have complications or are at hig ...

. In 1963, H7N3 was first found in Britain, in turkeys. For the first time since 1979, H7N3 was found in the UK in April 2006. It infected birds and one poultry worker (whose only symptom was conjunctivitis) in a

Norfolk, England Norfolk () is a ceremonial and non-metropolitan county in East Anglia in England. It borders Lincolnshire to the north-west, Cambridgeshire to the west and south-west, and Suffolk to the south. Its northern and eastern boundaries are the North ...

Witford Lodge Farm. Oseltamivir was used for prevention and 35,000 chickens were culled. In 2005, H7N3 was detected in migratory bird droppings in Taiwan. On September 27, 2007, another outbreak of H7N3 was detected in a poultry operation in Saskatchewan, Canada. The Canadian Food Inspection Agency has announced the euthanization of the flock and the disinfection of all building, materials, and equipment in contact with the birds or their droppings. In June, 2012, an outbreak was found on about 10 farms in

Jalisco Jalisco (, , ; Nahuatl: Xalixco), officially the Free and Sovereign State of Jalisco ( es, Estado Libre y Soberano de Jalisco ; Nahuatl: Tlahtohcayotl Xalixco), is one of the 31 states which, along with Mexico City, comprise the 32 Federal En ...

, Mexico. Of the over 6 million birds checked, 1.7 million were found to be sick. The area primarily produces layers and supplies eggs. The virus is not transmitted from hens to their eggs.

Sources

External links

Influenza Research Database
Database of influenza sequences and related information. {{Taxonbar, from=Q6030296

H7N3 Influenza A virus subtype H7N3 (A/H7N3) is a subtype of the species Influenza A virus (sometimes called bird flu virus). In North America, the presence of H7N3 was confirmed at several poultry farms in British Columbia in February 2004; flocks ...

Sources

Further reading

External links