Cells in BAL fluid after instillation of different doses of biopesticide. Mean number of cells in bronchoalveolar lavage (BAL) fluid from mice (n = 5 per group) 24 hours after intratracheal instillation of Vectobac® biopesticide. Sterile water served as vehicle and was used for dilutions. For each mouse, 200 cells were counted and differentiated. Values are means with SEM.