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Lab Test Dictionary

Ova and Parasites, Stool, Concentrate and Permanent Smear (681)


Microscopic Examination of Concentrate; Permanent Stained Smear


O and P with Permanent Stain; Cryptosporidium;

Specimen Type

See Collection Instructions

Performing Lab

Quest Diagnostics San Juan Capistrano

Epic ID


Lab Test Days


Standard TAT

5-7 Days

Collection Information

Specimen Required

5-10 g fresh stool preserved in 10% formalin and Polyvinyl Alcohol transport or single Total-Fix transport vial or Para-Pak SVT transport vial.

Container Type

See Below

Collection Instructions

Interfering substances: Bismuth, barium (wait 7-10 days), antimicrobial agents (wait 2 weeks), gallbladder dye (wait 3 weeks after procedure). Place fresh stool in 10% formalin transport vial, as well as a PVA transport medium or single Total-Fix® vial, within 30 minutes of collection. Add stool to bring the liquid level to the fill to here line on the vial. Mix well. Send specimen(s) at room temperature in the same shipping container. If parasite infestation is strongly suspected, collect at least 3 stool specimens every other day, since a single specimen can be negative. 10-25 mL unpreserved urine in a sterile screw-cap container or 2-10 mL sputum (unpreserved) in a sterile screw-cap container or formalin vial or bronchoalveolar lavage (BAL) in a sterile screw-cap container with 10% formalin is also acceptable. Urine may be submitted unpreserved for exam for Schistosoma. Collect at mid-day. Peak egg secretion occurs between noon and 3 p.m. Do not submit first morning specimen. In patients with hematuria, eggs may be found trapped in blood and mucous in the terminal portion (last-voided portion) of the urine specimen. Sputum: The specimen should be a deep expectorated sputum, preferably collected in the early morning. A 24-hour sputum collection is also acceptable. Submit in a sterile screw-cap container, unpreserved or in 10% formalin to increase stability.

Processing Information - Lab Use Only

Transport Temperature


Specimen Stability

Room Temp: 6 Months for Preserved Stool or Sputum/BAL (Unacceptable for Unpreserved Stool, Urine or Sputum/BAL); Refrigerated: 6 Months for Preserved Stool (48 Hours for Unpreserved Urine or Sputum/BAL) (Unacceptable for Preserved Sputum/BAL); Frozen: Una

Rejection Criteria

Unpreserved stool; Specimen containing barium; Stool preserved in medium other than parasitology fixative; Received frozen; Stool submitted in expired transport vial; Preservied urine; Unpreserved sputum and urine received room temp or frozen; Liver abscess or aspirate; ECOFIX transport vial; White and Orange Stool Preservative Containers

Included Tests

Ova and Parasite Concetrate Result, Trichrome Result.


Giardia is strongly suspected, please see Giardia Antigen, EIA, Stool, test code 8625.

CPT Codes

87177, 87209