title: VACCINATION WITH FREEZE-DRIED BCG.
abstract: Sixty first-year medical students, negative to 1:2000 and 1:100 dilutions of old tuberculin (OT), were vaccinated with freezedried BCG vaccine. At six months, 98.3% were found to be positive reactors as ascertained by the intracutaneous (Mantoux) method, using 1:2000 and 1:100 dilutions of OT, and 73.7% as ascertained by the Heaf test, using a tuberculin PPD solution containing 100,000 T.U. per ml.
mesh_terms: D001500:BCG Vaccine; D002170:Canada; D005612:Freeze Drying; D006801:Humans; D007201:Indicator Dilution Techniques; D007271:Injections, Intradermal; D009163:Mycobacterium bovis; D013337:Students, Medical; D014373:Tuberculin; D014374:Tuberculin Test; D014611:Vaccination
chemical_list: D001500:BCG Vaccine; D014373:Tuberculin
keywords: BCG VACCINATION; CANADA; FREEZE DRYING; TUBERCULIN TEST