Evolution
These viruses appear to have evolved ~120 years ago with a rapid increase in their population size within the last 40–60 years. They appear to have evolved initially in wild boars and subsequently spread to domestic pigs. The rate of evolution has been estimated to be 3.86 x 10−4 - 8.23 x 10−4 subsitutions per site per year. This rate is similar to other single stranded DNA viruses.
Read more about this topic: Porcine Parvovirus
Famous quotes containing the word evolution:
“Like Freud, Jung believes that the human mind contains archaic remnants, residues of the long history and evolution of mankind. In the unconscious, primordial “universally human images” lie dormant. Those primordial images are the most ancient, universal and “deep” thoughts of mankind. Since they embody feelings as much as thought, they are properly “thought feelings.” Where Freud postulates a mass psyche, Jung postulates a collective psyche.”
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