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Test Code M606 Parasites, Screen for Giardia lamblia and Cryptosporidium species

Performing Laboratory

Barnes-Jewish Hospital Laboratory

Methodology

Immunoassay for Giardia lamblia and Cryptosporidium species only.

This test is more sensitive than the microscopic exam for these 2 parasites. If a complete microscopic exam is needed for those patients in whom the likelihood of a parasitic infection other than Giardia lamblia or Cryptosporidium species is higher, please write Complete Microscopic Ova and Parasite Exam on request form (see #M602 Parasites, Complete Microscopic Examination, Stool).

Specimen Requirements


Acceptable Specimens:Stool in Parasitology Transport Kit (1 vial 10% formalin, 1 vial polyvinyl alcohol fixative). Stool should be added to each vial to bring liquid level up to “Fill to Here” line; approximately 5 mL of stool for each vial.

 

Collection Procedure:

Using a Parasitology Transport Kit, collect stool as described in instructions provided with each kit. (Swab or specimen contaminated with urine or water is not acceptable.)

Note: 1. Do not collect stool if the patient has been:
A. On the following drugs or using these preparations for the preceding 7 to 10 days: aluminum-containing compounds, barium, bismuth, clindamycin, iron salts, kaolin drugs, magnesium, metronidazole, tetracycline, or trimethoprim/sulfisoxazole.
B. Using these preparations for the preceding 2 days: oil laxatives or enemas.
2. Collect 3 specimens over a 3 to 9 day period for outpatients (do not collect more than 1 per day) or 1 specimen per day for the first 3 days after admission for hospitalized patients. (Specimen collected more than 3 days after a patient is admitted is not acceptable, without consultation. Contact the lab medicine resident: 747-1320 (#3). Virtually all parasite infections are acquired outside the hospital. Pool multiple specimens on same day and submit as 1.

Day(s) Test Set Up

Monday through Friday

Turnaround Time:
STAT: not available
Routine: results available within 24 hours for specimens received Monday through Thursday and on Monday for specimens received Friday through Sunday.

Reference Values

Negative

Literature Reference:

Garcia Lynne S. Diagnostic medical parasitology. 5th ed. Washington, DC: ASM Press; 2007;761-81.

Test Classification and CPT Coding

87899 x 2

Additional Information

For BJH Laboratory Use Only
Minimum Volume:

Stool should be added to each vial to bring liquid level up to “Fill to Here” line; approximately 5 mL of stool for each vial.
Laboratory Processing Instructions:
Test performed in BJH Microbiology.

Specimen Transport Temperature

Ambient