Explain the nature of this immunologic discrepancy

Mycobacterium tuberculosis and Listeria monocytogenes are both facultative intracellular parasites i Show more Mycobacterium tuberculosis and Listeria monocytogenes are both facultative intracellular parasites in humans. These pathogens have the ability to grow and multiply inside phagocytes. Artificial passive immunity against these infections can be achieved only by transferring E rosette forming leukocytes along with their corresponding adherent cells from an immune individual. E-rosette forming cells alone are incapable of effecting this transfer. Transferring E rosette forming leukocytes along with their corresponding adherent cells from a tuberculin skin positive individual will confer passive immunity to an individual undergoing a mixed lung infection caused by Mycobacterium tuberculosis and Listeria monocytogenes. However such transfer will not confer immunity to an individual who is infected only with Listeria monocytogenes. Explain the nature of this immunologic discrepancy. Show less

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