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Different types of Influenza Virus

June 22, 2013

OMICS Publishing Group is an open access publishing group from where we can acquire the scientific information which is with free of cost. OMICS also conducts scientific conferences across the world. There are three different kinds of influenza virus – A, B, and C. Type A viruses contaminates people and different kinds of animals, including birds, pigs, and horses. Type B influenza is normally found only in humans, and type C is mostly seen in people, but has also been found in pigs and dogs sometimes. Influenza epidemics are due to type A viruses, and therefore these are the most terrifying kind of influenza virus; neither types B or C have triggered pandemics.

Type A influenza is further categorized into subtypes based on which versions of two different necessary proteins are existing on the outer lining area of the virus. These necessary proteins are known as hemagglutinin (HA) and neuraminidase (NA). There are 16 different versions of HA and 9 different editions of NA. The influenza A subtypes are further categorized into strains, and the names of the virus strains consist of the position where the strain was first discovered and the year of development.

About Influenza Virus:

Influenza_virusInfluenza virus has a rounded form and has a part of spikes on the outside. There are two different types of spikes, each created of different proteins – one is the hemagglutinin (HA) proteins and the other is the neuraminidase (NA) proteins. The HA proteins allows the virus to adhere to a cell, so that it can enter into a host cell and begin the disease procedure (all malware need to get into tissues to help them create more copies of themselves).

How Influenza Virus Change:

Influenza virus is one of the most adjustable viruses known. There are two methods that influenza virus changes – these are known as drift and shift. Drifting, or antigenic drift, is a constant, ongoing change that happens when the malware makes small “mistakes” when copying its genetic information. This can result in a minor distinction in the HA or NA necessary protein. Although the changes may be little, they may be important enough so that the individual immune mechanisms will no more identify and protect against the changed necessary protein.

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