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Test Code EIA Stl Protozoa Stool Giardia, Crypto + E Histo EIA

Important Note

This orderable is only available to providers through appropriate PowerPlans.

Biohazard Infectious

Clinical System Name

Stool Giardia, Crypto + E histo EIA



Stool Protozoa


Entamoeba histolytica


Stool EIA



The Triage Parasite Panel EIA is a qualitative enzyme immunoassay that provides rapid, simultaneous detection of the three clinically significant protozoan parasites, Giardia lamblia (duodenalis), Cryptosporidium parvum, and Entamoeba histolytica/dispar.


The Triage Parasite Panel EIA is indicated for initial stool testing for these protozoa, and for treatment follow-up. If provider is concerned about detection of additional pathogens, the Rapid Infectious Diarrhea PCR Pnl should be ordered (through PowerPlans).

Sample Requirements

Specimen: Fresh or freshly frozen, unfixed stool specimens. 


Container: Clean, leak-proof container.


Preferred Volume: 1 gram or ml


Minimum Volume: 0.5 gram or ml


Note: Rectal swabs and/or rectal swabs collected with the ESwab system are not acceptable for this test. 

Note: Fixed stool specimens collected in e.g. “Alpha TEC ETM” C&S”  or “Para-Pak C&S” are not acceptable for this test.

Processing Instructions

CPA: Send stool to Microbiology ASAP. If sample is shared and only one tube, syringe, or other container is received, affix shared sample label and sent entire sample pus requisition to Microbiology. Please call Microbiology with sample related questions.


Off-Site Locations: This testing is only performed at SCH Microbiology. For satellite locations, the sample should be refrigerated prior to and during transport to the SCH Micro lab.


Specimen Temp Time
Fresh Stool Room Temp 2 hours
  Refrigerated ≤24 hours
  Frozen 4 days


Note: Testing of stool samples that have been stored at room temperature >2 hours may result in reduced sensitivity for the detection of C. parvum antigen.


Procedure Performed Turn Around Time (TAT)
EIA for Protozoa Batched several times/day 24 hours


Performing Laboratory

Seattle Children's Lab




EIA (enzyme immunoassay)

CPT Code




Reference Range


Notifiable Conditions

Giardia lamblia and Cryptosporidium are both notifiable conditions for Washington State Laboratories:


See Link below for Notifiable Conditions for WA State:


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