Human activity to blame for virus spread — study

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Human activity to blame for virus spread — study

(AFP) — Diseases such as the COVID-19 pandemic sweeping the globe could become more common as human activity destroys habitats and forces disease-carrying wild animals into ever-closer proximity with us, a major study showed on Wednesday.

Illegal poaching, mechanised farming and increasingly urbanised lifestyles have all led to mass biodiversity loss in recent decades, devastating populations of wild animals and increasing the abundance of domesticated livestock.

Around 70 per cent of human pathogens are zoonotic, meaning they at some point make the leap from animals to humans as with COVID-19.

US-based researchers looked at more than 140 viruses known to have been transmitted from animals to humans, and cross-referenced them with the IUCN’s Red List of endangered species.

They found that domesticated animals, primates, bats and rats carried the most zoonotic viruses — around 75 per cent.

But they also concluded that the risk of spillover from animal to human populations was highest when a species is threatened by over-consumption and habitat loss.

“Our data highlight how exploitation of wildlife and destruction of natural habitat in particular, underlie disease spillover events, putting us at risk for emerging infectious diseases,” said Christine Johnson, from the University of California’s School of Veterinary Medicine, lead author of the research.

(AFP) — Diseases such as the COVID-19 pandemic sweeping the globe could become more common as human activity destroys habitats and forces disease-carrying wild animals into ever-closer proximity with us, a major study showed on Wednesday.

Illegal poaching, mechanised farming and increasingly urbanised lifestyles have all led to mass biodiversity loss in recent decades, devastating populations of wild animals and increasing the abundance of domesticated livestock.

Around 70 per cent of human pathogens are zoonotic, meaning they at some point make the leap from animals to humans as with COVID-19.

US-based researchers looked at more than 140 viruses known to have been transmitted from animals to humans, and cross-referenced them with the IUCN’s Red List of endangered species.

They found that domesticated animals, primates, bats and rats carried the most zoonotic viruses — around 75 per cent.

But they also concluded that the risk of spillover from animal to human populations was highest when a species is threatened by over-consumption and habitat loss.

“Our data highlight how exploitation of wildlife and destruction of natural habitat in particular, underlie disease spillover events, putting us at risk for emerging infectious diseases,” said Christine Johnson, from the University of California’s School of Veterinary Medicine, lead author of the research.

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