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23239 Alpha-1-Antitrypsin, Feces (A1AF)

Alpha-1-Antitrypsin, Feces (A1AF)
Test Code: AATFSO
Synonyms/Keywords
​Ref Lab Code: 182, a-1-Antitrypsin, Feces, Alpha 1 Antitrypsin, Alpha-1-Antitrypsin, Feces Only, Antitrypsin, Feces
Useful For
Diagnosing protein-losing enteropathies, especially when used in conjunction with serum alpha-1-antitrypsin (A1A) levels as a part of A1A clearance studies (see #8835 "Alpha-1-Antitrypsin Clearance, Feces and Serum"; preferred test).​
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
Fecal​ ​Stool container ​ ​5g ​Homogenized Stool: 1 mL ​
Collection Processing Instructions
1. Collect a random stool specimen.
2. See Stool Collection Information Sheet in Special Instructions.
Specimen Stability Information
Specimen Type Temperature Time
​Fecal ​Frozen (preferred) ​14 days
​ ​Ambient ​14 days
​ ​Refrigerated ​14 days
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Medical Laboratory Monday through Saturday​ ​1 day
Nephelometry​
Reference Lab
Mayo Clinic Laboratories
Test Information
​
Alpha-1-antitrypsin (A1A) is resistant to degradation by digestive enzymes and is, therefore, used as an endogenous marker for the presence of blood proteins in the intestinal tract. A1A clearance is reliable for measuring protein loss distal to the pylorus.
 
Gastrointestinal protein enteropathy has been associated with regional enteritis, sprue, Whipple's intestinal lipodystrophy, gastric carcinoma, allergic gastroenteropathy, intestinal lymphangiectasia, constrictive pericarditis, congenital hypogammaglobulinemia, and iron deficiency anemia associated with intolerance to cow's milk.
Reference Range Information
Performing Location Reference Range
​Mayo Medical Laboratories ​<=54 mg/dL
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
​82103 ​ ​ ​ ​
Synonyms/Keywords
​Ref Lab Code: 182, a-1-Antitrypsin, Feces, Alpha 1 Antitrypsin, Alpha-1-Antitrypsin, Feces Only, Antitrypsin, Feces
Ordering Applications
Ordering Application Description
​Centricity ​Alpha-1-Antitrypsin, Feces (A1AF)
Cerner​ Alpha-1-Antitrypsin, Stool (A1AF)​
If the ordering application you are looking for is not listed, contact your local laboratory for assistance.
Specimen Requirements
Specimen Type Preferred Container/Tube Acceptable Container/Tube Specimen Volume Specimen Minimum Volume
(allows for 1 repeat)		 Pediatric Minimum Volume
(no repeat)
Fecal​ ​Stool container ​ ​5g ​Homogenized Stool: 1 mL ​
Collection Processing
1. Collect a random stool specimen.
2. See Stool Collection Information Sheet in Special Instructions.
Specimen Stability Information
Specimen Type Temperature Time
​Fecal ​Frozen (preferred) ​14 days
​ ​Ambient ​14 days
​ ​Refrigerated ​14 days
Useful For
Diagnosing protein-losing enteropathies, especially when used in conjunction with serum alpha-1-antitrypsin (A1A) levels as a part of A1A clearance studies (see #8835 "Alpha-1-Antitrypsin Clearance, Feces and Serum"; preferred test).​
Reference Range Information
Performing Location Reference Range
​Mayo Medical Laboratories ​<=54 mg/dL
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
​Mayo Medical Laboratory Monday through Saturday​ ​1 day
Nephelometry​
Reference Lab
Mayo Clinic Laboratories
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)		 Quantity Description Comments
​82103 ​ ​ ​ ​
For most current information refer to the Marshfield Laboratory online reference manual.