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# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
WBC-Stool
Test Code: STWBC
Synonyms/Keywords
​Fecal Leukocytes, Fecal PMN, Fecal Neutrophils
Test Components
​Gram stain of feces for the presence of PMN leukocytes associated with infectious diarrhea. This test has relatively low sensitivity and specificity for the presence of invasive enteric bacterial pathogens.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​No Feces​ Para-Pak C&S transport medium or other Cary-Blair based medium ​Fresh feces unpreserved ​1 gram (filled and emulsified to line on Para-Pak container 1 gram feces, one swab or Para-Pak C&S filled to line
​ESwab, or other Amies medium based swab ​1 ESwab, or 1 swab ​1 ESwab, or 1 swab
Collection Processing Instructions

Specimens should be delivered to the microbiology laboratory as soon as possible. Culture of specimens older than 24 hours may lead to a reduction in recovery of microorganisms.

Swabs:

  • ESwab: collect one swab for Gram stain, aerobic and anaerobic cultures, and an additional swab for each additional culture type or stain (e.g. fungus or mycobacteria).
  • Other Amies medium swab types: collect one swab for every culture and stain to be ordered.

See ESwab collection video for more information

For more information on Specimen Collection Media/Swab, see Specimen Transport Pictorial.
Specimen Stability Information
Specimen Type Temperature Time
Sterile container​, swab Room Temperature​ <= 4 hours
Refrigerate > 4 hours
​All other specimen types ​Room temperature
Rejection Criteria
Specimens received in formalin
Improper transport or storage​
​Specimens older than 4 days
​Leaking specimens
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Diagnostic Treatment Center ​Monday through Sunday ​Less than 2 hours ​Microscopy
​Eau Claire ​Monday through Sunday ​Less than 2 hours ​Microscopy
​Flambeau Hospital ​Monday through Sunday ​Less than 2 hours ​Microscopy
Lakeview Medical Center​ ​​Monday through Sunday ​​Less than 2 hours ​​Microscopy
Marshfield​ Monday through Sunday​ 1 day​ Microscopy, Gram Stain​
​Minocqua ​​Monday through Sunday ​​Less than 2 hours ​​Microscopy
Test Information
‘ESwab’ is a trademark of Copan Diagnostics.
Reference Range Information
Performing Location Reference Range
All Performing Sites No neutrophils (WBC) observed​
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​89055 ​Leukocyte assessment, fecal
Synonyms/Keywords
​Fecal Leukocytes, Fecal PMN, Fecal Neutrophils
Test Components
​Gram stain of feces for the presence of PMN leukocytes associated with infectious diarrhea. This test has relatively low sensitivity and specificity for the presence of invasive enteric bacterial pathogens.
Ordering Applications
Ordering Application Description
​Centricity

​a. Stain WBC Stool/leuk

b. Stool WBC Stain

c. WBC-Leukocytes

​Cerner White Blood Cell, Stool​
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Fasting Required Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)
Pediatric Minimum Volume
(no repeat)
​No Feces​ Para-Pak C&S transport medium or other Cary-Blair based medium ​Fresh feces unpreserved ​1 gram (filled and emulsified to line on Para-Pak container 1 gram feces, one swab or Para-Pak C&S filled to line
​ESwab, or other Amies medium based swab ​1 ESwab, or 1 swab ​1 ESwab, or 1 swab
Collection Processing Instructions

Specimens should be delivered to the microbiology laboratory as soon as possible. Culture of specimens older than 24 hours may lead to a reduction in recovery of microorganisms.

Swabs:

  • ESwab: collect one swab for Gram stain, aerobic and anaerobic cultures, and an additional swab for each additional culture type or stain (e.g. fungus or mycobacteria).
  • Other Amies medium swab types: collect one swab for every culture and stain to be ordered.

See ESwab collection video for more information

For more information on Specimen Collection Media/Swab, see Specimen Transport Pictorial.
Specimen Stability Information
Specimen Type Temperature Time
Sterile container​, swab Room Temperature​ <= 4 hours
Refrigerate > 4 hours
​All other specimen types ​Room temperature
Rejection Criteria
Specimens received in formalin
Improper transport or storage​
​Specimens older than 4 days
​Leaking specimens
Test Information
‘ESwab’ is a trademark of Copan Diagnostics.
Reference Range Information
Performing Location Reference Range
All Performing Sites No neutrophils (WBC) observed​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Diagnostic Treatment Center ​Monday through Sunday ​Less than 2 hours ​Microscopy
​Eau Claire ​Monday through Sunday ​Less than 2 hours ​Microscopy
​Flambeau Hospital ​Monday through Sunday ​Less than 2 hours ​Microscopy
Lakeview Medical Center​ ​​Monday through Sunday ​​Less than 2 hours ​​Microscopy
Marshfield​ Monday through Sunday​ 1 day​ Microscopy, Gram Stain​
​Minocqua ​​Monday through Sunday ​​Less than 2 hours ​​Microscopy
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
​89055 ​Leukocyte assessment, fecal
For most current information refer to the Marshfield Laboratory online reference manual.