Four relatives of the bat species thought to be the original source of the novel coronavirus have been found in Africa.
The previously undiscovered animals are considered to be ‘sister’ species to the horseshoe bat, which is widely believed to be the origin of the SARS-CoV-2 virus which has caused the COVID-19 pandemic.
Bats act as reservoirs to coronaviruses and are immune to them but have the ability to spread them.
Researchers say that studying the four new species and the viruses they harbour could help scientists and medics to prepare for any future outbreaks.
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Researchers found the leaf-nosed bat (pictured) consists of eight 8 distinct lineages; 3 of these (including this bat) appear to be new to science
The previously undiscovered bat species are closely related to the horseshoe bat (pictured). This winged mammal is thought to be a reservoir for the SARS-CoV-2 virus which causes COVID-19
In the case of COVID-19, the novel coronavirus jumped from a horseshoe bat in Wuhan and infected an intermediary species, believed to be a pangolin or stray dog.
It is then thought to have passed on to humans, which are considered to be the last species in the chain of transmission, known as the terminal host.
The four ‘sister’ species are called leaf-nosed bats and were identified by scientists using genetic analysis.
The specimens were all in a museum but had been collected originally in Africa.
The new bats belong to a group known scientifically as the Hipposideridae, and are also found throughout Asia and Australasia.
They get their name from from bizarre flaps of skin on their faces that help them catch insects and act as radar dishes for their echolocation calls.
Lead author Dr Bruce Patterson, curator of mammals at the Field Museum, Chicago, said: ‘With COVID-19, we have a virus that is running amok in the human population.
‘It originated in a horseshoe bat in China. There are 25 or 30 species of horseshoe bats in China, and no one can determine which one was involved. We owe it to ourselves to learn more about them and their relatives.’
Scientists that identified the four species of bat do say they are confident none of the new species carry any diseases problematic to human health.
Researchers from the Chicago Field Museum partnered with colleagues at Kenya’s Maasai Mara University and the National Museums of Kenya.
In a study, published today in a special pandemic issue of the journal Zookeys, they say the leaf-nosed bats were hiding in plain sight.
They are similar, and yet distinct, from pre-existing species which have already been identified. This, the researchers say, is a good indicator of their close relationship to other bat species.
Discovery of the bats is so recent they are yet to be given specific names and are only being referred to by the generic term ‘leaf-nosed’, which is the umbrella term for the family the animals they belong to.
Their discovery is particularly important in the light of the COVID-19 crisis, report the international team.
But while bats are thought to be the origin of the COVID-19 pandemic, researchers are urging the public to think rationally and not condemn bats as inherently dirty or infected animals.
Explained Dr Patterson: ‘All organisms have viruses. The roses in your garden have viruses.
‘We worry about viruses when it comes to flu and pandemics, but viruses are part of nature and have been as far back as we go. And many viruses are harmless.’
Bats contract many infections without suffering serious adverse side effects because they have exceptionally fast metabolisms and robust DNA, which is able to repair any damage.
Humans do not have these capabilities.
Pictures emerged on Twitter earler this year showing soup cooked with a bat. Bats are used in traditional Chinese medicine to ‘treat’ a series of illness, including coughing, malaria and gonorrhea. Bats have been confirmed as the most likely source of the infection
Pictured, another of the new bat species. Discovery of the bats is so recently they have yet to be given specific names and are only being referred to by the generic term leaf-nosed which refers to the corresponding umbrella term for the family the animals belong to
Members of a third new bat species. A colony of what is apparently a new species of Hipposideros is pictured at an abandoned gold mine in Western Kenya
Large colonies huddle together and this allows the virus to spread throughout the group. Meanwhile, their ability to fly allows them to carry it over a large geographic range.
Despite this, bats are reclusive creatures and actively avoid interactions with humans.
Dr Terry Demos, a post-doctoral researcher and lead author of the study, also believes studying the new bat species and the virus held within cold help prevent future outbreaks akin to the current COVID-19 disease.
He said: ‘Unless you try to seek out bats, either to harass them or kill them, it’s very, very unlikely that they’ll infect you.
‘Leaf-nosed bats carry coronaviruses – not the strain that’s affecting humans right now.
‘But this is certainly not the last time a virus will be transmitted from a wild mammal to humans.
‘If we have better knowledge of what these bats are, we’ll be better prepared if that