The isolated lung strip and single open tracheal ring: a convenient combination for characterizing Schultz Dale anaphylactic contractions in the peripheral and central airways of the guinea-pig.

1. The use of the isolated lung strip and single open tracheal ring for studying Schultz Dale anaphylactic contractions in both the peripheral and central airways is described. 2. This method is particularly relevant to studies of anaphylaxis because many preparations may be obtained from a single sensitized animal. 3. Isolated preparations from control guinea-pigs did not respond to ovalbumin, whereas the lung strip and trachea taken from guinea-pigs sensitized to ovalbumin, contracted markedly to that antigen. 4. The peripheral and central airways from sensitized animals responded in the same way to antigen challenge.