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Test Code OP Direct Ova and Parasite Direct Exam

Biohazard Infectious

Clinical System Name

Ova + Parasite Direct Exam Wet Mount


Direct OP

Ova & Parasite direct exam





Shistosoma haematobium



Samples are examined directly for presence/ID of Parasites. Microscopic exam (wet mount) is performed for ova and parasites such as Shistosoma haematobium from urine. Macroscopic exam is performed for larger parasites, including worms, ticks and other arthropods. 


For Ova and Parasite exam (Helminths) on  actual stool samples see OP Worm.

Sample Requirements

Specimen: Urine for S. haematobium should be collected midday (noon to 3 pm) for peak shedding of eggs. Submit at least 10 ml of urine. Other macroscopic parasites (worms, ticks, etc) should be kept moist with a few drops of saline.

Container: Sterile Container

Preferred Vol: NA

Minimum Vol: NA

Processing Instructions

CPA: Send sample to Microbiology for processing. 


Off-site collection:  Off-site Children's Lab locations should send sample to SCH Main Campus for testing. Sample should be kept at room temperature prior to and during courier transport. 


Other off-site locations, keep sample at room temperature prior to and during transport. 


Temp Time
Room temp 1 hour
Refrigerated N
Frozen N


If the sample is a worm or other parasite and only macroscopic examination is required, sample is stable up to 24 hours from collection. 



Procedure Performed Turn Around Time (TAT)
Direct OP Exam 24/7 24 hours


Performing Laboratory

Seattle Children's Laboratory



Microbiology Laboratory

CPT Codes



This test is not limited to the CPT codes listed.  Others may be added as more testing is necessary and depending on the pathogens isolated.

Reporting Information

Final Report: 24 hours


Notifiable Result

See Link below for Notifiable Conditions for WA state labs:


See Link below for PDF of phone numbers for Local Health jurisdictions (by County) in WA State: