NOTES ON TUBERCULIN FOR NURSES
VARIETIES OF TUBERCULIN—THEORIES OF TUBERCULIN REACTION—TUBERCULIN TESTS.
By THEODORE B. SACHS, M. D.
VARIETIES OF TUBERCULIN AND METHODS OF PREPARATION
Old Tuberculin—T. Announced by Koch in 1890.
Tubercle Bacilli of human origin.
Grown on beef broth containing 5% glycerine, 1% peptone, sodium chloride; growths 6 to 8 weeks.
Sterilized by steam one-half hour.
Evaporated (at a temp. not higher than 70° C.) to 1⁄10 its volume.