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Increased elastase activity in respiratory fluids following pulmonary F. tularensis challenge. Bronchoalveolar lavage fluid from mice (5-day post challenge, n = 5/group) from each group, i.e., Mock (PBS-treated) control, F. tularensis LVS, and F. tularensis (type A) SCHU S4 infected animals was prepared and assayed for elastase activity in triplicate as described under Section “Materials and Methods” ** = p < 0.05.
