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Orthopoxvirus is a genus of viruses in the family Poxviridae and subfamily Chordopoxvirinae.Vertebrates, including mammals and humans, and arthropods serve as natural hosts. . There are 12 species in this gen
Like other members of the Paramyxoviridae family, it produces enveloped virions, and is a negative-sense single-stranded RNA virus. The virus is particularly fragile and is quickly inactivated by heat, desiccation, and sunlight. [14] Measles virus evolved from the then-widespread rinderpest virus most probably between the 11th and 12th ...
Canine distemper virus is closely related to measles virus and is the most important viral disease of dogs. The disease (which was first described in 1760, by Edward Jenner, the pioneer of smallpox vaccination, is highly contagious, but is well controlled by vaccination. In the 1990s, thousands of African lions died from the infection, which ...
The virus often infects many tissues, if not the whole plant, where it can continue to replicate. There are a variety of methods the virus can use to spread throughout the organism but the most common route use the vascular system, otherwise known as the xylem and phloem, and the plasmodesmata, which interconnect adjacent cells.
The virus is transmitted by vector, mechanical inoculation, grafting, or seeds, and it is transmitted in a non-persistent manner. The vectors may be arthropods , specifically insects of the order Hemiptera , family Aphididae (colloquially one would say cucumovirus is transmitted by aphids).
There is tenuous evidence that a virus common to peppers, the Pepper Mild Mottle Virus (PMMoV) may have moved on to infect humans. [9] This is a rare and unlikely event as, to enter a cell and replicate, a virus must "bind to a receptor on its surface, and a plant virus would be highly unlikely to recognize a receptor on a human cell.
Brome mosaic virus (BMV) is a small (28 nm, 86S), positive-stranded, icosahedral RNA plant virus belonging to the genus Bromovirus, family Bromoviridae, in the Alphavirus-like superfamily. BMV was first isolated in 1942 from bromegrass ( Bromus inermis ), [ 2 ] had its genomic organization determined by the 1970s, and was completely sequenced ...
The virus is highly contagious and is spread by coughing and sneezing via close personal contact or direct contact with secretions. [52] Measles is the most contagious virus known. [ 20 ] It remains infective for up to two hours in that airspace or nearby surfaces.