Peripheral blood leukopenia induced by CP.

Mice were injected subcutaneously with CP 2 (A) or 5 (B) times and were bled at various time points after the first CP at intervals indicated on the graphs. Differential numbers of monocytes, neutrophils, and lymphocytes were determined on blood smears as described in “Materials and methods.” Results are expressed as mean from 2 mice (A) or as mean ± SEM from 2 to 7 mice per time point (B).