No significant effects on peritoneal and blood cell populations of Bacto-Tryptone IP and slight (0.2 to 0.3 mL) bleeding. Blood reticulocyte change refers to reticulocyte percentages in venous blood 2 hours after and just before the IP Bacto-Tryptone injection. Median values with their 95% confidence intervals and the number of mice examined (top columns) are given.