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Viruses are a major driving force in evolution; the arms race between viruses and their host, or the Red Queen hypothesis, causes strong evolutionary pressures in both the host and viruses. [1] The host evolves to evade and destroy viruses, while the virus evolves mechanisms to continue infecting the host. Evolution is also influenced by viral ...
In 1948, in Kansas, US, 7% of the wheat crop was destroyed by wheat streak mosaic virus. The virus was spread by mites called Aceria tulipae. [39] In 1970, the Russian plant virologist Joseph Atabekov discovered that many plant viruses only infect a single species of host plant. [37]
Astroviruses (Astroviridae) are a type of virus that was first discovered in 1975 using electron microscopes following an outbreak of diarrhea in humans. [1] In addition to humans, astroviruses have now been isolated from numerous mammalian animal species (and are classified as genus Mamastrovirus) and from avian species such as ducks, chickens, and turkey poults (classified as genus ...
A satellite virus important to human health that demonstrates the need for co-infection to replicate and infect within a host is the virus that causes hepatitis D. Hepatitis D or delta virus (HDV) was discovered in 1977 by Mario Rizzetto [ 10 ] and is differentiated from hepatitis A, B, and C because it requires viral particles from hepatitis B ...
Mimivirus, short for "mimicking microbe", is so called to reflect its large size and apparent Gram-staining properties. [5] Mimivirus has a large and complex genome compared with most other viruses. Until 2013, when a larger virus Pandoravirus was described, it had the largest capsid diameter of all known viruses. [6]
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The existence of the eerily-nicknamed viruses has been known to researchers for decades, but this is the first time traces of the viruses have been discovered in the US. Vampire viruses prey on ...
A variant of the rustrela virus-- related to the wider-known rubella virus which causes a skin rash in humans -- called RusV was discovered in a female mountain lion in Douglas County, Colorado ...