Severe acute respiratory syndrome (SARS) was caused by a newly emerged coronavirus, now known as SARS coronavirus (SARS-CoV). (1, 2). In spite of the . PDF | Severe acute respiratory syndrome (SARS) emerged in to in southern China. The origin of its etiological agent, the SARS. Severe acute respiratory syndrome (SARS) emerged in to in southern China. The origin of its etiological agent, the SARS coronavirus (SARS-CoV).
|Published (Last):||15 February 2018|
|PDF File Size:||19.63 Mb|
|ePub File Size:||2.79 Mb|
|Price:||Free* [*Free Regsitration Required]|
Coronavirus link A decade after the SARS pandemic, scientists have found the strongest evidence to date it originated in bats. A team of mostly Chinese researchers report today in the journal Nature they have isolated two new viruses that are closely related to the SARS virus.
Finding the natural “reservoir” of the SARS virus – a coronavirus – is an important part of being prepared for the future, says Crameri. SARS first broke out in “wet markets” in China, which involved the sale of live animals – often from the wild.
Bats are natural reservoirs of SARS-like coronaviruses. – Semantic Scholar
While civet cats were first reseroirs to be the reservoir, researchers soon discovered that these animals were only infected around markets. He was involved in a number of studies that found genetic evidence that cave-dwelling microbats, sold as a food source coronaviduses wet markets, were harbouring SARS-like coronaviruses. But the viruses differed from SARS, particularly in the region of the virus that binds to a host protein called ACE2, facilitating infection, says Crameri.
Since these SARS-like viruses do not bind to ACE2, this made researchers wonder whether SARS really came from bats, or whether it needed an intermediate host to convert the virus coronavirues a form that could infect humans. If and colleagues showed that cells from humans, mice and bats, which did not express ACE2, were not infected by the new viruses but once the cells were modified to express ACE2, the viruses did infect them. The researchers also found that the new viruses also had exactly the same proteins used by the SARS virus to bind to ACE2 in host cells.
They sars-lioe need any intermediate hosts,” says Crameri. He says this is also the first time researchers have been able to isolate a live coronavirus from bats.
Prior to this, only fragments of coronavirus DNA had been found in bats. Crameri says the MERS virus, which also appears sarss-like come from a microbat, binds to human cells via a different receptor and is less infectious than SARS, but kills a higher percentage of those it infects.
Bats are an ancient animal that diverged from other mammals 80 million years ago and Crameri says this could explain why they carry a high number of pathogens that they themselves are unaffected by. Humans are mainly exposed to viruses from bats via the animals’ faeces, says Crameri, adding resrevoirs stress in the animals appears to increase this shedding.
Bats are natural reservoirs of SARS-like coronaviruses.
Now that animals, including bats, and humans live closer together as our population expands globally, the opportunity for direct transmission of these dangerous viruses becomes reeservoirs and more of an issue. By clicking ‘Send to a friend’ you agree ABC Online is not responsible for the content contained in your email message. Skip to navigation Skip to content. This site is being redeveloped. For all the latest ABC Science content click here.
Bats May Be Animal Reservoir For SARS Virus
Site Navigation Video Audio Photos. Email the editor Share this article Email a friend.
Latest News Ancient whales were fearsome predators with razor-sharp teeth, fossil analysis shows Focus on the beauty of the human body Australian trapdoor spider may coronvairuses a seafaring castaway from Africa Molecule discovery on Titan an intriguing clue in hunt for life Ancient DNA shows Canaanites survived Biblical ‘slaughter’ Latest news web feed.