Flu Virus Anatomy

It is an enveloped virus that is the outer layer is a lipid membrane which is taken from the host cell in which the virus multiplies. Influenza a viruses can be broken down into sub types depending on the genes that make up the surface proteins.

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The influenza a and b viruses that routinely spread in people human influenza viruses are responsible for seasonal flu epidemics each year.

Flu virus anatomy. They are the causative agent for all flu pandemics and are known to infect humans other mammals and birds. Influenza viruses have a specific appearance. The influenza virion as the infectious particle is called is roughly spherical.

Influenza a virus are further classified into sub types based on the properties of their major membrane glycoproteins. Structurally the influenza virus is spherical in shape. It is covered in an envelope made of a lipid bilayer with spikes of glycoproteins called haemagglutinin and neuraminidase.

The virus is typically a circular shape that contains two different proteins on the outside. Types a and b. The structure of the influenza virus see figure 1 is somewhat variable but the virion particles are usually spherical or ovoid in shape and 80 to 120 nanometers in diameter.

Inserted into the lipid membrane are spikes about 10 nm long which are glycoproteins known as ha hemagglutinin and na neuraminidase. The first protein hemagglutinin h is designed to attach the virus to a host cell. What does a flu virus look like.

There are two main types of influenza flu virus. An enveloped virus the outer layer is a lipid membrane which is taken from the host cell. Structure of influenza virus influenza virion are usually spherical diameter 80 110 nm.

Sometimes filamentous forms of the virus occur as well and are more common among some influenza strains than others. After a virus attaches to the host cell hemagglutinin allows it to enter into the cell.

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