Increasing incidence of infectious diseases could select for smaller sized vertabrates

[Emily]

(That should be 'vertebrates' in the title.)

http://rspb.royalsocietypublishing.org/content/early/2010/07/27/rspb.2010.0960.abstract

Pathogen-induced rapid evolution in a vertebrate life-history trait
Published online before print July 28, 2010, doi: 10.1098/rspb.2010.0960 Proc. R. Soc. B

Anthropogenic factors, including climate warming, are increasing the incidence and prevalence of infectious diseases worldwide. Infectious diseases caused by pathogenic parasites can have severe impacts on host survival, thereby altering the selection regime and inducing evolutionary responses in their hosts.....