Disease hotspots mapped

A letter in Nature this week looks at “Global trends in emerging infectious diseases.” ¹ It includes some interesting maps, including these:

They show the global distribution of relative risk of an emerging infectious disease (EID) event caused by: (a) zoonotic pathogens from wildlife, (b) zoonotic pathogens from non-wildlife, (c) drug-resistant pathogens and (d) vector-borne pathogens. That’s based on climate, human population density and growth, and wildlife host species richness. Note in particular the map in the top right-hand corner: basically risk of zoonotic pathogens jumping to humans from livestock. Compare this livestock density ²:

Not a great match with density of domesticated animals. Maybe the correlation would be better with livestock diversity?

1. Kate E. Jones, Nikkita G. Patel, Marc A. Levy, Adam Storeygard, Deborah Balk, John L. Gittleman & Peter Daszak. Nature 451, 990-993 (21 February 2008); doi:10.1038/nature06536.
2. FAO has more data on this.