The phrase "direct smear" refers to a medical test where a sample (such as blood or body fluid) is spread thinly on a slide to be examined under a microscope. Full definition
Properly collecting fecal material for fecal flotation and fecal direct smears, creating appropriate slides and accurately reading and interpreting slides (humanesocietymiami.org)
The oocysts can be identified through either a fecal float or a direct smear. (dogcare.dailypuppy.com)
Properly collecting fecal material for flotation and direct smears, creating appropriate slides and accurately reading and interpreting slides (humanesocietymiami.org)