The Swine Health Information Center reports the evolution of the African Swine Fever virus, as it moves through Asia, is complicating the diagnosis of the infection. The Swine Health Information Center’s continues to track the global movement of African Swine Fever.
SHIC Executive Director Dr. Paul Sundberg confirms scientists have seen some evolution in the virus, due in part to the use of unapproved gene deleted vaccines in Asia.
Clip-Dr. Paul Sundberg-Swine Health Information Center:
Those unapproved vaccines may cause an infection, may cause a low-level infection and sometimes when there are reports of different viral strains that are out there, it's rather difficult to separate the natural evolution of the virus itself, with the viral strains that may be used in unapproved vaccines.