Influenza A virus subtype H5N3

Influenza A virus subtype H5N3 is a subtype of the Influenza A virus that primarily affects birds, but can occasionally infect humans and other animals. It is a subtype of the species Influenza A virus of the genus Influenzavirus A in the family Orthomyxoviridae.

History

The H5N3 subtype was first identified in Scotland in 1963, during an outbreak of avian influenza in turkeys. Since then, it has been detected in various bird species worldwide, including ducks, geese, and chickens.

Structure and Classification

Like all Influenza A viruses, H5N3 is an Orthomyxovirus and has a segmented genome composed of eight single-stranded negative-sense RNA segments. The H5N3 subtype is classified based on the antigenic properties of its two surface glycoproteins, Hemagglutinin (H) and Neuraminidase (N).

Pathogenesis and Transmission

H5N3 is highly pathogenic in birds, causing severe disease and high mortality rates. Transmission occurs primarily through direct contact with infected birds or their secretions, but can also occur through contact with contaminated environments.

Prevention and Control

Prevention and control of H5N3 outbreaks in poultry involve biosecurity measures, surveillance, and vaccination. In humans, antiviral drugs such as Oseltamivir can be used for treatment and prophylaxis.

See Also

• Influenza A virus subtype H5N1
• Influenza A virus subtype H5N2
• Influenza A virus subtype H5N8
• Influenza A virus subtype H7N9

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