UCSF Navigation Bar

UCSF Departments of Pathology & Laboratory Medicine Home Page

Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

Internal Resources

Click here for more information about laboratory operations and procedures

If you have additional questions regarding this test, please call: 415-353-1667

Search Our Test Menu

Ova and Parasite Exam

Item Value
Approval req'd? Yes, contact Microbiology at x3-1268 for test requests on patients > 72 hours after admission.
Available Stat? No
Test code P401
Test group Parasites
Performed by Microbiology
In House Availability Monday-Friday, day shift
Method Microscopy
Patient Preparation Patient should be off ALL antibiotics for ≥ 2 weeks before for an O&P examination to be valid.
Collection Instructions SAF tubes and instructions available from the 1st floor ACC draw station, 2330 Post St draw station, 5th floor lab at Parnassus and 2nd floor lab at MtZ.

Patient should be off ALL antibiotics for ≥ 2 weeks before for an O&P examination.

Collect 3 samples (no more than one per 48 hours) to improve the chance of a positive result.
Container type
Inpatients Clean container
ED/Outpatients SAF collection vial


SAF tubes and instructions available from the 1st floor ACC draw station, 2330 Post St draw station, 5th floor lab at Parnassus and 2nd floor lab at MtZ.
Amount to Collect See preferred volume
Sample type Stool ("O&P")
Preferred volume 10 mL stool
Note: for SAF vial fill to red line on container label
Min. Volume 5 mL stool
Note: for SAF vial fill to red line on container label
UCSF Rejection Criteria Unpreserved stool received > 1 hour after collection. Stool in a preservative other than SAF. More than one sample received within 24 hours. Stool not mixed well in SAF, or if preservative has been poured out. SAF container filled past the red line on the container label
Processing notes Transfer unpreserved stool to SAF preservative upon receipt in lab.
Normal range Negative
Synonyms Ova & Parasites; O&P; scolex; Protozoan concentration; Coccidia
Stability Unpreserved 1 hour, preserved 2 weeks
Turn around times 1-3 days
Additional information Includes concentration and iron-hematoxylin smear, and Kinyoun stain of unconcentrated sample for Cyclospora and Cryptosporidia.

Also see entries for Giardia lamblia Antigen, Cryptosporidium and Cyclospora, and Microsporidia.
CPT coding 87177, 88313, 87206
LOINC code 10704-5
Last Updated 6/19/2013 2:43:10 PM
Entry Number 719
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center