What are HN viruses?
Overview. The H1N1 flu, commonly known as swine flu, is primarily caused by the H1N1 strain of the flu (influenza) virus. H1N1 is a type of influenza A virus, and H1N1 is one of several flu virus strains that can cause the seasonal flu. Symptoms of the H1N1 flu are the same as those of the seasonal flu.
What is HN influenza?
The influenza type A virus, known as H1N1 is a respiratory infection that was popularly named “swine flu.” The virus was first recognized in April 2009 and spread quickly to 74 countries worldwide. The World Health Organization (WHO) declared the virus a global pandemic.
What type of virus is H5N1?
H5N1 is a highly pathogenic avian (bird) flu virus that has caused serious outbreaks in domestic poultry in parts of Asia and the Middle East. Since its widespread re-emergence in 2003, rare, sporadic human infections with this virus have been reported in Asia, and later in Africa, Europe, and the Middle East.
What is H9 virus?
Avian Influenza A(H9) Viruses A(H9N2) virus has been detected in bird populations in Asia, Europe, the Middle East and Africa. Sporadic avian influenza A(H9N2) virus infections have been reported in people with mild upper respiratory tract illness, although some infections have resulted in death.
Is the Spanish flu the same as H1N1?
The Spanish flu was the name given to a form of influenza (flu) caused by an H1N1 virus that started in some type of bird (avian origin). The Spanish flu was a pandemic — a new influenza A virus that spread easily and infected people throughout the world.
Are there different types of H1N1 viruses?
That virus (often called “2009 H1N1”) has now replaced the H1N1 virus that was previously circulating in humans. Influenza B viruses are not divided into subtypes, but can be further broken down into lineages and strains. Currently circulating influenza B viruses belong to one of two lineages: B/Yamagata and B/Victoria.
What is the meaning of a virus classification?
Virus classification is the process of naming viruses and placing them into a taxonomic system similar to the classification systems used for cellular organisms . Viruses are classified by phenotypic characteristics, such as morphology, nucleic acid type, mode of replication, host organisms, and the type of disease they cause.
How are Aiai Viruses classified?
AI viruses are further classified by their pathogenicity, low or high, based upon the ability of a particular virus strain to cause disease in chickens. Highly pathogenic avian influenza viruses in poultry are usually H5 or H7 subtypes of Type A influenza, although low pathogenic forms of these H5 and H7 viruses also exist.
What is the classification of viruses with RNA genomes?
All viruses that have an RNA genome, and that encode an RNA-dependent RNA polymerase (RdRp), are members of the kingdom Orthornavirae, within the realm Riboviria. Group III: viruses possess double-stranded RNA genomes, e.g. rotavirus.