Analysis with anti- BCG and anti- Ravenel sera, absorption tests with anti-η antibody, and the failure to detect any factor that affected η antigenic activity in BCG or strain H37Ra confirmed the absence of η precipitinogen in BCG and Ravenel. No η-positive strains were found among 7 strains of , 19 representative strains of 15 mycobacterial species other than and , or 13 niacin-negative strains of mycobacteria isolated from patients. However, η activity was detected in all 9 laboratory strains of tested, including virulent and avirulent strains, and in 29 of 30 niacin-positive strains isolated from patients, including 15 strains with single or multiple resistance to seven drugs.


Article metrics loading...

Loading full text...

Full text loading...


Most cited this month Most Cited RSS feed

This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error