The phrase "fecal smear" refers to a diagnostic test where a small sample of poop is examined to detect any signs of illness or infections in the digestive system. Full definition
Microscopic examination of a direct fecal smear or of a sample that has been stained with iodine can reveal the presence of giardia. (dogcare.dailypuppy.com)
In almost can case of soft stools or diarrhea it is a good idea to examine a stool sample to make sure that there are no signs of intestinal parasites and to consider checking fecal smears for signs of bacteria associated with intestinal problems. (vetinfo.com)
Fecal samples may be examined for the presence of fungi and gastrointestinal parasites by procedures called fecal floatation, direct fecal smear, fungal culture and / or bacterial culture. (petwave.com)