FIG. 1.

Spiking experiments performed on serial dilutions of purified C. parvum oocysts in PBS (white bars) and stools, either undiluted (black bars) or diluted at 1/10 in PBS (gray bars). Cryptosporidium DNA was detected by Cryptodiag using the Cryptosporidum sp. probe (R² = 0.94 for dilution in PBS; R² = 0.91 for dilution in stools; R² = 0.96 for 1/10 dilution in diluted stool). Shown are the means of two OD values. The error bars indicate standard deviations.