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Prion interference with multiple prion isolates Schutt CR; Bartz JCPrion 2008[Apr]; 2 (2): 61-3Co-inoculation of prion strains into the same host can result in interference, where replication of one strain hinders the ability of another strain to cause disease. The drowsy (DY) strain of hamster-adapted transmissible mink encephalopathy (TME) extends the incubation period or completely blocks the hyper (HY) strain of TME following intracerebral, intraperitoneal or sciatic nerve routes of inoculation. However, it is not known if the interfering effect of the DY TME agent is exclusive to the HY TME agent by these experimental routes of infection. To address this issue, we show that the DY TME agent can block hamster-adapted chronic wasting disease (HaCWD) and the 263K scrapie agent from causing disease following sciatic nerve inoculation. Additionally, per os inoculation of DY TME agent slightly extends the incubation period of per os superinfected HY TME agent. These studies suggest that prion strain interference can occur by a natural route of infection and may be a more generalized phenomenon of prion strains.|Animals[MESH]|Cricetinae[MESH]|Humans[MESH]|PrPSc Proteins/*metabolism/toxicity[MESH]|Sciatic Nerve/metabolism/pathology[MESH]|Scrapie/chemically induced/*metabolism[MESH]|Sheep[MESH]|Wasting Disease, Chronic/chemically induced/*metabolism[MESH] |
