Complex sentence: The fecal sample can be obtained either by wiping soiled toilet tissue on the film or, more frequently in medical settings, it's obtained either with a gloved finger (with a digital rectal exam) or with a wooden stick dipped into stool.
Split into simpler sentences: The fecal sample can be obtained either by wiping soiled toilet tissue on the film. In medical settings, it's obtained either with a gloved finger (with a digital rectal exam) or with a wooden stick dipped into stool.