@article {bh87, title = {Guinea pigs sublethally infected with aerosolized Legionella pneumophila develop humoral and cell-mediated immune responses and are protected against lethal aerosol challenge. A model for studying host defense against lung infections caused by intracellul}, journal = {The Journal of Experimental Medicine}, volume = {165}, year = {1987}, pages = {3}, author = {Breiman, R F and Horwitz, M A} }