Name: Parasite, Extended Microscopic Exam, Fecal
Test Name: Parasite, Extended Microscopic Exam, Fecal
Health Link Test Code: XOP
LIS Test Code: PARE
CPT Code(s): 87177, 87209
Days Performed: Mon-Fri, dayshift - day varies.
In-Lab Turnaround Time: 1 - 5 days.
Stat In-Lab Turnaround Time: Not available stat.
See instructions included in Para-Pak® Ova & Parasite (O & P) kit (pink and gray caps) for stool specimens. If patient has had barium or bismuth enemas, wait 2 weeks before collecting specimen. If the patient has received bismuth mineral oil, antibiotics, antimalarial agents or nonabsorbable antidiarrheal preparations, also wait 2 weeks before collecting specimen.
If sending fresh stool in a sterile container send minimum of 12 mL of stool.
If sending Para-Pak® Ova & Parasite (O & P) kit fill to red fill line indicated on vial (~5-6 mL of stool).
Unpreserved: 1 hour
Transport specimen to the laboratory.
Specimens on patients hospitalized more than 3 days are not acceptable. See "Additional Information" below.
LIMIT: One specimen every 48 hours.
Interpretation Type: Expected Results
Critical Calls: yes
Requests for parasite exam will be honored if the patient is characterized by one of the following. Please include this information when ordering the test.
- recently traveled outside of the United States to an endemic area
- recently immigrated from a country where intestinal parasites are endemic
- recent ingestion of raw seafood
- eosinophilia, OR
- test has been ordered or approved by an Infectious Disease physician, Gastroenterologist, or Director of Microbiology.
If the above criteria are NOT met, a Giardia/Cryptosporidium Antigen Test will be performed instead.
Specimens will be retained for 2 weeks from the collection date. If further testing is requested, please contact the Director of Microbiology by calling the UWHC Microbiology Lab at (608) 263-8710.
Examination for Cryptospordium, Cyclospora, Isospora, Microsporidia and pinworm must be ordered separately and clearly indicated on request form.
For most gastrointestinal parasites, a single stool sample has a sensitivity of over 90%. If symptoms persist, examination of additional stool specimens may be warranted.
Because these agents do not cause hospital acquired infections, specimens on patients who have been hospitalized greater than 3 days will require approval of the Director of Microbiology or Pathology Resident.