What does orthomyxoviridae look like?
What does orthomyxoviridae look like?
Orthomyxoviridae form enveloped, spherical or pleomorphic virions with 80–120 nm in diameter. Their linear, negative-sense RNA genome has a total length of 10–15 kb and is divided into eight (IAV, IBV) and seven (ICV, IDV) segments, respectively.
What disease is caused by orthomyxoviridae?
The orthomyxoviruses (influenza viruses) constitute the genus Orthomyxovirus, which consists of three types (species): A, B, and C. These viruses cause influenza, an acute respiratory disease with prominent systemic symptoms.
What is meant by Orthomyxovirus?
Definition of orthomyxovirus : any of a family (Orthomyxoviridae) of single-stranded RNA viruses that have a spherical or filamentous virion with numerous surface projections of glycoprotein and include the causative agents of influenza.
What is influenza’s scientific name?
Influenza viruses comprise four species. Each of the four species is the sole member of its own genus, and the four influenza genera comprise four of the seven genera in the family Orthomyxoviridae. They are: Influenza A virus (IAV), genus Alphainfluenzavirus. Influenza B virus (IBV), genus Betainfluenzavirus.
What are the characteristics of Orthomyxovirus?
orthomyxovirus, any virus belonging to the family Orthomyxoviridae. Orthomyxoviruses have enveloped virions (virus particles) that measure between 80 and 120 nm (1 nm = 10−9 metre) in diameter. The nucleocapsid, which consists of a protein shell, or capsid, and contains the viral nucleic acids, has helical symmetry.
Is Spanish flu the same as H1N1?
The 1918 Spanish flu was the first of three flu pandemics caused by H1N1 influenza A virus; the most recent one was the 2009 swine flu pandemic.
Which is the most important American bunyavirus?
La Crosse Virus The most serious disease of bunyavirus origin in the United States is La Crosse encephalitis.
How is orthomyxoviridae transmitted?
Typically, influenza is transmitted from infected mammals through the air by coughs or sneezes, creating aerosols containing the virus, and from infected birds through their droppings. Influenza can also be transmitted by saliva, nasal secretions, feces and blood.
What are the symptoms of multiple sclerosis ( MS )?
Multiple sclerosis. Multiple sclerosis. In multiple sclerosis, the protective coating on nerve fibers (myelin) is damaged and may eventually be destroyed. Depending on where the nerve damage occurs, MS can affect vision, sensation, coordination, movement, and bladder and bowel control. Multiple sclerosis (MS) is a potentially disabling disease
What are the members of the family Orthomyxoviridae?
This chapter focuses on Orthomyxoviridae family whose member genera include Influenzavirus A, Influenzavirus B, Influenzavirus C, Thogotovirus, and Isavirus.
How long does it take for MS symptoms to develop?
At least 50% of those with relapsing-remitting MS eventually develop a steady progression of symptoms, with or without periods of remission, within 10 to 20 years from disease onset. This is known as secondary-progressive MS.