Show difference in bacilli it was stated in a paper read before the national association for the study and prevention ot of tuberculosis that human tubercle bacilli possibly vary in virulence in different patients ten bacilli have been found sufficient to infect a guinea pig in some instances and in others have been sound found necessary immunity in animals may bo be obtained by the tha injection ot of increasing numbers ot of tubercle bacilli fill beginning with one or two and cautiously cautiously increasing the number from a culture the minimum fatal dose of w which is about or by the injection of say loo or bacilli ot of a virulent culture to cause a local leslo lesion which can be cut out preliminary precautions having been taken to prevent the spread of 0 infection |