Track viruses, not animal carriers, to prevent future pandemics

accreditation

Trying to identify animals that are most likely to transmit viruses to humans may not help prevent future pandemics, researchers say.

Instead, the focus should be on specific types of viruses and how they spread, they suggest.

The current coronavirus pandemic is believed to have originated in bats, and most emerging infectious diseases are zoonotic, meaning that they're spread from animals to humans, according to researchers from the University of Glasgow in Scotland.

This pandemic shows the serious health and economic threat that zoonotic viruses pose, so it's crucial to learn more about them.

Nothing special about bats

This study found little variation in the proportion of zoonotic viruses in 11 major orders of birds and mammals, and that animal orders with more species hosted more viruses overall and more zoonotic viruses.

The findings challenge the belief that certain animal reservoirs, such as bats, pose a heightened risk of spreading viruses to humans, according to the study published in the Proceedings of the National Academy of Sciences.

Instead, the characteristic traits of the viruses, rather than their animal hosts, will be the more useful predictors of zoonotic transmission, the researchers said.

"The recognition that several high-profile viruses originated from bats triggered tremendous interest in whether there was something special about their ecology or immune systems, which makes their viruses disproportionately likely to infect humans," said Daniel Streicker, a senior research fellow at the University of Glasgow's Institute of Biodiversity, Animal Health and Comparative Medicine.

"Our finding that the number of zoonoses that have emerged from bats is about what would be expected for any mammalian group of their size casts doubt on the idea that traits of bats produce viruses with a heightened propensity to infect humans," Streicker said in a university news release.

"To know if there is anything special about bats, we now need to understand whether the bat viruses that do jump to humans cause more severe disease or spread better among humans than viruses from other animals, which is currently uncertain," he said.

READ | New coronavirus wasn't made in a lab, genomic study shows

READ | Scientists discover 'spike' protein on the new coronavirus - what does this mean?

READ | The coronavirus could be two viruses merged into one

Image credit: CDC, Unsplash
We live in a world where facts and fiction get blurred
In times of uncertainty you need journalism you can trust. For 14 free days, you can have access to a world of in-depth analyses, investigative journalism, top opinions and a range of features. Journalism strengthens democracy. Invest in the future today. Thereafter you will be billed R75 per month. You can cancel anytime and if you cancel within 14 days you won't be billed. 
Subscribe to News24
Voting Booth
Eskom has considered continuous load shedding at Stage 2, instead of introducing it when the power system faces a crunch. What are your thoughts?
Please select an option Oops! Something went wrong, please try again later.
Results
I'm all for it - we're going to have power cuts regardless, so we might as well have some stability to better plan our lives
45% - 4550 votes
No thanks! I prefer having periods of no load shedding and we cannot normalise this crisis
55% - 5553 votes
Vote
Rand - Dollar
18.07
-0.6%
Rand - Pound
19.51
-0.6%
Rand - Euro
17.41
-0.3%
Rand - Aus dollar
11.73
-0.2%
Rand - Yen
0.13
-0.3%
Gold
1,640.01
-0.2%
Silver
18.70
-0.9%
Palladium
2,050.50
-1.1%
Platinum
855.30
-0.4%
Brent Crude
86.15
-5.0%
Top 40
56,562
-1.0%
All Share
62,824
-0.9%
Resource 10
55,128
-2.1%
Industrial 25
78,631
+0.3%
Financial 15
13,876
-1.9%
All JSE data delayed by at least 15 minutes Iress logo
Editorial feedback and complaints

Contact the public editor with feedback for our journalists, complaints, queries or suggestions about articles on News24.

LEARN MORE