Abstract
Summary
A method of utilizing suspensions of sensitized collodion pellets for the study of antibody-formation in animals during experimental studies with the tubercle bacillus is described. Suspensions of pellets sensitized with old tuberculin uniformly demonstrate the presence of antibodies against tuberculin in the blood serum of animals which have received injections of tubercle bacilli. The test clearly distinguishes sera of normal animals from those obtained from animals infected with tubercle bacilli. This method demonstrates the presence of antibodies against tuberculin in many of the animals tested at a time when the complement-fixing antibodies are not demonstrable, and at a time when many of the animals fail to exhibit skin-sensitivity to tuberculin.
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