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A comparison of bats and rodents as reservoirs of zoonotic viruses: are bats special?

Proceedings of the Royal Society B

By:
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Abstract

Bats are the natural reservoirs of a number of high-impact viral zoonoses. We present a quantitative analysis to address the hypothesis that bats are unique in their propensity to host zoonotic viruses based on a comparison with rodents, another important host order. We found that bats indeed host more zoonotic viruses per species than rodents, and we identified life-history and ecological factors that promote zoonotic viral richness. More zoonotic viruses are hosted by species whose distributions overlap with a greater number of other species in the same taxonomic order (sympatry). Specifically in bats, there was evidence for increased zoonotic viral richness in species with smaller litters (one young), greater longevity and more litters per year. Furthermore, our results point to a new hypothesis to explain in part why bats host more zoonotic viruses per species: the stronger effect of sympatry in bats and more viruses shared between bat species suggests that interspecific transmission is more prevalent among bats than among rodents. Although bats host more zoonotic viruses per species, the total number of zoonotic viruses identified in bats (61) was lower than in rodents (68), a result of there being approximately twice the number of rodent species as bat species. Therefore, rodents should still be a serious concern as reservoirs of emerging viruses. These findings shed light on disease emergence and perpetuation mechanisms and may help lead to a predictive framework for identifying future emerging infectious virus reservoirs.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
A comparison of bats and rodents as reservoirs of zoonotic viruses: are bats special?
Series title:
Proceedings of the Royal Society B
Volume
280
Issue:
1756
Year Published:
2013
Language:
English
Publisher:
Royal Society Publishing
Publisher location:
London, U.K.
Contributing office(s):
Fort Collins Science Center
Description:
20122753; 1484
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
1471
Last page:
2954