TB & Outbreaks Week
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Life Sciences
New life sciences study findings have been reported by scientists at University of Texas
August 12th, 2008
"The intrinsic plasticity of RNA viruses can facilitate host range changes that lead to epidemics. However, evolutionary processes promoting cross-species transfers are poorly defined, especially for arthropod-borne viruses (arboviruses)," scientists in the United States report. "In theory, cross species transfers by arboviruses may be constrained by their alternating infection of disparate hosts, where optimal replication in one host involves a fitness tradeoff for the other. Accordingly, freeing arboviruses from alternate replication via specialization in a single host should accelerate adaptation. This hypothesis has been tested by using cell culture model systems...
Source: TB & Outbreaks Week (2008-08-12)
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