Science & Technology: Zoonoses: From Paleolithic Times to the Swine Flu
Posted 01 October 2009 | By
In the past few years, emergent disease outbreaks have increased and nearly all have involved zoonotic or species-jumping infectious agents. These zoonoses are caused either by apparently new agents or by previously known agents appearing in places or in species in which the disease was previously unknown. As an example, closely related strains of some viruses may mutate into "new viruses" that cause human disease, as evidenced by the newly reported swine flu pandemic.