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Influenza A virus structure. The influenzavirus virion is pleomorphic; the viral envelope can occur in spherical and filamentous forms. In general, the virus's morphology is ellipsoidal with particles 100–120 nm in diameter, or filamentous with particles 80–100 nm in diameter and up to 20 μm long. [5]
Cat flu is the common name for a feline upper respiratory disease, which can be caused by one or more possible pathogens: Feline herpes virus, causing feline viral rhinotracheitis (cat common cold; this is the disease most associated with the "cat flu" misnomer), Feline calicivirus, Bordetella bronchiseptica (cat kennel cough), or
3D model of the flu virion. (M2 labeled in white.) The Matrix-2 (M2) protein is a proton-selective viroporin, integral in the viral envelope of the influenza A virus. The channel itself is a homotetramer (consists of four identical M2 units), where the units are helices stabilized by two disulfide bonds, and is activated by low pH.
Feline viral rhinotracheitis (FVR) is an upper respiratory or pulmonary infection of cats caused by Feline herpesvirus, also called Feline herpesvirus 1 (FeHV-1), of the family Herpesviridae. It is also commonly referred to as feline influenza , feline coryza , and feline pneumonia but, as these terms describe other very distinct collections of ...
Cap snatching is best described in influenza viruses, especially influenza A. In Orthomyxoviridae , the viral family of influenza, the RdRp is divided into three subunits: PA, PB1 and PB2. PB1 first binds the 5’ end of the viral RNA (vRNA), activating PB2 and causing the 3’ end of the vRNA to form a double-stranded zone with the 5’ end.
Cell structure of a gram positive bacterium. In comparison to eukaryotes, the intracellular features of the bacterial cell are extremely simple. Bacteria do not contain organelles in the same sense as eukaryotes. Instead, the chromosome and perhaps ribosomes are the only easily observable intracellular structures found in all bacteria. There do ...
The pathophysiology of influenza is significantly influenced by which receptors influenza viruses bind to during entry into cells. Mammalian influenza viruses preferentially bind to sialic acids connected to the rest of the oligosaccharide by an α-2,6 link, most commonly found in various respiratory cells, [1] [19] [3] such as respiratory and ...
Cats with avian influenza exhibit symptoms that can result in death. The avian influenza viruses cats may get include H5N1 or H7N2, [ 1 ] notable pathogenic subtypes of the virus. In order to get the virus, a cat would need to be in contact with infected waterfowl, poultry, or uncooked poultry. [ 2 ]