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  • Title: Rodent malaria: BCG-induced protection and immunosuppression.
    Author: Smrkovski LL, Strickland GT.
    Journal: J Immunol; 1978 Oct; 121(4):1257-61. PubMed ID: 100553.
    Abstract:
    One dose of 10(7) viable units of Mycobacterium bovis, strain BCG, protected a significant number of Swiss mice from a primary challenge with 10(4) thoracic sporozoites of Plasmodium berghei. Immunization with irradiated sporozoites induced greater protection than that observed in BCG-treated with BCG and surviving a primary sporozoite challenge were not protected from rechallenge, whereas mice immunized with irradiated sporozoites and surviving initial challenge of sporozoites were solidly immune to further challenge. Immunizing mice with BCG and irradiated sporozoites simultaneously resulted in a synergistic effect of increased protection against a primary challenge of sporozoites only if the two immunogens were administered on the same day and if the mice were challenged 1 to 3 days later. Mice given BCG and irradiated sporozoites and surviving a primary challenge of sporozoites were unable to survive rechallenge. BCG given to mice previously immunized with irradiated sporozoites suppressed their protective immunity against sporozoite challenge.
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