Sub-Saharan Africa and South East Asia are most at risk from bat viruses jumping to humans and causing new diseases that could lead to deadly outbreaks, scientists warned on Tuesday. Approximately 60 to 75 per cent of emerging infectious diseases are so-called “zoonotic events” – where animal diseases jump into people – and bats in particular are known to carry many zoonotic viruses. The tiny animals are the suspected origin of rabies, Ebola, SARS (Severe Acute Respiratory Syndrome) and possibly Middle East Respiratory Syndrome (MERS), and could cause other as yet unknown epidemics in future.
By combining the separate maps, we’ve created the first global picture of the overall risks of bat viruses infecting humans in different regions.
Kate Jones, UCL’s chair of ecology and biodiversity
Scientists at University College London (UCL), the Zoological Society of London and Edinburgh University aimed to map out the highest-risk areas, using a variety of factors including large numbers of bat viruses found locally, increasing population pressure, and hunting bats for bushmeat. The research, using data published between 1900 and 2013, found that overall West Africa – the epicentre of the recent Ebola outbreak - is at highest risk for zoonotic bat viruses. The wider sub-Saharan Africa region, as well as South East Asia, were also found to be hotspots.
People in these areas may also hunt bats for bushmeat, unaware of the risks of transmissible diseases which can occur through touching body fluids and raw meat of bats.
Liam Brierley, a PhD student at Edinburgh University