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Cell-mediated Immunity and Delayed-type Hypersensitivity in Pseudomonas Aeruginosa-infected Mice

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Date 1982 Jan 1
PMID 7078523
Citations 2
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Abstract

In mice repeated systemic injections of Pseudomonas aeruginosa viable cells were able to induce a specific delayed-type hypersensitivity, which was evaluated as increase both in footpad swelling and in the weight of popliteal lymph nodes, after a challenge in the footpad. Unfractionated spleen cells or T lymphocyte-enriched spleen cells from sensitized donors were able to specifically transfer the delayed-type hypersensitivity to syngeneic recipients but failed to protect them against a lethal challenge with P. aeruginosa. In contrast, serum or B lymphocyte and macrophage-enriched spleen cells from the same donors were capable of transferring protective immunity but failed to induce any delayed-type hypersensitivity reaction in the recipients. These results clearly show that in systemic P. aeruginosa infections a dissociation between delayed-type hypersensitivity and acquired cellular resistance occurs.

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