[Induction of an allergic response of the delayed type against Salmonella abortus-ovis]

Studied were several of the conditions of inducing an allergy reaction of a delayed type in guinea pigs experimentally infected with Salmonella abortusovis as well as the correlation between the production of agglutinins and precipitins and the allergic reaction of a delayed type. It was found that a live culture of Salmonella abortusovis produced strongest allergic effects when injected into the pads. The injection (in the pads) of a killed culture, using no adjuvant, and the oral administration of a live culture did not sensibilize the animals. No correlation was established between the agglutinin and precipitin production and the allergic reaction of a delayed type.