Parasites And Their Virulence

Parasites and their Virulence ABSTRACT Why do some parasites thwarting the host they depend upon while others coexist with their host? cardinal prime factors determine parasitic virulence: the manner in which the parasite is transmitted, and the evolutionary history of the parasite and its host. Parasites which have annex a new host species pitch to be frequently virulent than parasites which have coevolved with their hosts. Parasites which are transmitted horizontally fly the coop to be more virulent than those transmitted vertically.

It has been assumed th at parasite-host interactions of necessity evolve toward lower virulence. This is contradicted by studies in which virulence is documentation or increases over time. A model which encompasses the variability of parasite-host interactions by synthesizing spatial (transmission) and temporal (evolutionary) factors is examined. Lenski and May (1994) and Antia et al. (1993) predict the modulation o...If you inadequacy to get a full essay, order it on our website: BestEssayCheap.com

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