Assertion: bse | /r/CreatedBy | single major strain
Facets:
value: with the ability
type: OTHER
Source sentences:
text: Although multiple agent strains have been identified in sheep scrapie (1,2) and human CJD (3,4), early evidence showed that BSE was caused by a single major strain (5,6) with the ability to efficiently cross the species barriers and showing stable features even when transmitted to other species.