FIG 6.
Stool DNA was probed for murine β-actin to measure the amount of host-shed cells in the feces. C57BL/6 mice, nourished or malnourished, were challenged with 2 × 107 unexcysted oocysts per mouse and then euthanized 20 h later. (A) Stools were collected and DNA extracted for measurement of murine β-actin. The fold change of the DNA level relative to nourished infected group is shown as the mean ± SEM (n = 3). (B) Numbers of C. parvum organisms in stool were normalized against the DNA level of murine β-actin.