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Life Sciences
Research on life sciences described by scientists at Emory University
August 27th, 2008
According to a study from the United States, "Why do parasites harm their hosts' Conventional wisdom holds that because parasites. depend on their hosts for survival and transmission, they should evolve to become benign, yet many parasites cause harm. Theory predicts that parasites could evolve virulence (i.e., parasite-induced reductions in host fitness) by balancing the transmission benefits of parasite replication with the costs of host death." "This idea has led researchers to predict how human interventions-such as vaccines-may alter virulence evolution, yet empirical support is critically lacking.. We studied a protozoan parasite of monarch butterflies and found...
Source: Vaccine Weekly (2008-08-27)
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