Influenza A virus subtype H7N1

Influenza A virus subtype H7N1 is a subtype of the Influenza A virus that can cause illness in humans and many other animal species. A bird-adapted strain of H7N1 is considered endemic in domestic poultry. The dominant strain of H7N1 is found in birds, with a small percentage found in humans.

Overview

The Influenza A virus is a major pathogen in birds, humans, and other animals. The virus is classified into subtypes based on two surface proteins: Hemagglutinin (H) and Neuraminidase (N). The H7N1 subtype is one of many possible combinations of these two proteins.

Infection in Birds

H7N1 is highly pathogenic in birds. The virus was first identified in Italy in 1999, where it caused a significant outbreak in poultry. The virus is spread through direct contact with infected birds, and indirectly from the environment. Infected birds shed the virus in their saliva, nasal secretions, and feces.

Infection in Humans

Human infections with H7N1 are rare, but have been reported. Symptoms are similar to other types of flu and include fever, cough, sore throat, and muscle aches. In severe cases, infection can lead to pneumonia and other complications.

Prevention and Control

Vaccination is the most effective way to prevent infection. However, because the virus can mutate rapidly, vaccines must be updated regularly. Control measures in poultry include culling infected flocks, disinfecting premises, and implementing biosecurity measures.

See Also

• Influenza A virus subtype H7N9
• Influenza A virus subtype H7N3
• Influenza A virus subtype H7N7

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