Figure 1.

Oral tolerance blocks granulocyte accumulation in the peritoneal cavity. Flow cytometry of peritoneal lavage fluid collected 24 hr after i.p. challenge. Shown are representative dot plot distribution of lymphocytes (R1), monocytes (R2) and granulocytes (R3) by size (forward light scatter) versus granularity (side angle scatter) of one mice of each group: (a)s.c. immunized and saline (im sal) i.p. injected mice; (b) s.c. immunized (im) and OVA i.p. challenged mice; (c) previously tolerized (tol) to OVA, s.c. immunized and OVA i.p. challenged.