Decreased delayed-type hypersensitivity and increased protection to Listeria monocytogenes seen in mice infected with mucoid and nonmucoid Pseudomonas aeruginosa.

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RESUMO

Infection of mice with Pseudomonas aeruginosa, washed and unwashed, mucoid and nonmucoid, altered subsequent immunity to Listeria monocytogenes. Mice were protected against lethal doses of L. monocytogenes yet exhibited decreased delayed-type hypersensitivity footpad swelling to sublethal doses. The mucoid coating of mucoid P. aeruginosa, an important pathogen in chronic bronchopulmonary disorders, imparted no additional immunomodulating capabilities to P. aeruginosa.

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