Assertion: c. diphtheriae's potential | /r/CapableOf | observe in vivo
Facets:
value: rarely
type: DEGREE
Source sentences:
text: Although the potential of phage conversion to transform NTTBs into toxigenic strains is considered low and rarely observed in vivo, circulation of NTTBs may act as a repository for tox gene sequences and therefore pose a risk for disease.