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Class: XI Subject: Biology Topic: Biological classification
Class: XI Subject: Biology Topic: Biological classification

... Ans: Classes of fungi ...
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Virus - Heroku

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... E a g 1 e’s medium 5, containing pancreatin 6 at a dilu­ tion of 1: 60 7. The plaques were revealed by staining with neutral red after a plaque development time of 6 days. Heat treated virus was also titered using the facilitation pro ced u re3; kaolin was added to the ino­ culum at a final concentr ...
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... this virus (Edling 2011). High densities of infected mice, which may be present during an outbreak in a breeding colony, may lead to aerosol transmission of the virus to humans. Syrian hamsters (Mesocricetus auratus) also carry LCMV, and in rare instances, rats, guinea pigs, or other rodents may bec ...
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... This enzymes system becomes active when the released phage particles infects the new host cell. However, the tail-fibres attached on the surface of the host cell bend to bring the end-plate in contact with the cell wall surface. Now, the protein sheath of the tail longitudinally contracts pushing th ...
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Influenza A virus



Influenza A virus causes influenza in birds and some mammals, and is the only species of influenza virus A. Influenza virus A is a genus of the Orthomyxoviridae family of viruses. Strains of all subtypes of influenza A virus have been isolated from wild birds, although disease is uncommon. Some isolates of influenza A virus cause severe disease both in domestic poultry and, rarely, in humans. Occasionally, viruses are transmitted from wild aquatic birds to domestic poultry, and this may cause an outbreak or give rise to human influenza pandemics.Influenza A viruses are negative-sense, single-stranded, segmented RNA viruses.The several subtypes are labeled according to an H number (for the type of hemagglutinin) and an N number (for the type of neuraminidase). There are 18 different known H antigens (H1 to H18) and 11 different known N antigens (N1 to N11). H17 was isolated from fruit bats in 2012. H18N11 was discovered in a Peruvian bat in 2013.Each virus subtype has mutated into a variety of strains with differing pathogenic profiles; some are pathogenic to one species but not others, some are pathogenic to multiple species.A filtered and purified influenza A vaccine for humans has been developed, and many countries have stockpiled it to allow a quick administration to the population in the event of an avian influenza pandemic. Avian influenza is sometimes called avian flu, and colloquially, bird flu. In 2011, researchers reported the discovery of an antibody effective against all types of the influenza A virus.
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