Diseases wiping out hosts - impact on...

Diseases wiping out hosts - impact on disease biodiversity - literature?

Posted in the Epidemiology Forum

Sam

Tadworth, UK

#1 Sep 18, 2012
Hi all,

Question - for diseases that massively reduce host numbers, such as multiple tree/crop fungi and bubonic plague, does this have a known, repeatable effect on disase biodiversity? I can see arguments for it going either way:

Reducing - drop in host population leads to stochastic genotype loss

Increasing - more succesful disease genotypes tend to wipe themselves out or at least reduce host density and so their own reproductive success (negative frequency dependent selection on common/succesful genotypes, promoting co-existance of numerous genotypes). Also reuction of host population creates fragmented metapopulation structure, slows compertition between disease genotypes

Is there a common answer or any good review papers? Thanks,

Sam

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