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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
Culture, Group A Strep Only
Test Code: GAS
Synonyms/Keywords
​GAS
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

 

Throat,
Perianal,
Rectal,
Vaginal​

 

ESwab
Other Amies medium based swab ​1 swab ​1 swab ​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 (including Gram) to be ordered.
 
 
For recovery of pathogens other than Group A Strep, use 'Culture, Aerobic with Sensitivities (AERS).
Specimen Stability Information
Specimen Type Temperature Time
​Swabs ​ Room Temp​ <= 4 hours​
​Refrigerate ​> 4 hours
Rejection Criteria
Dry swab
Specimens other than throat, perianal, rectal, vaginal​
​Leaking specimens
​Specimens older than 4 days
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center​ ​Monday through Sunday​ ​2 days ​Conventional culture, standard susceptibility testing, manual or automated identification methods.
​Marshfield Monday through Sunday​ 3 days​ Conventional culture, manual or automated identification methods, and nucleic acid sequence analysis as needed.
Test Information
‘ESwab’ is a trademark of Copan Diagnostics.
Reference Range Information
Performing Location Reference Range
All Performing Sites Negative for Group A Beta Hemolytic Strep​
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
87081​ Culture​
87077​ Aerobic isolate, definitive ID ​as needed
87147​ Immunologic method, per antiserum ​as needed
​87153 ​Identification by nucleic acid sequencing method ​as needed
Synonyms/Keywords
​GAS
Ordering Applications
Ordering Application Description
​Centricity ​Cult. Grp A Strep
​Cerner ​None
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

 

Throat,
Perianal,
Rectal,
Vaginal​

 

ESwab
Other Amies medium based swab ​1 swab ​1 swab ​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 (including Gram) to be ordered.
 
 
For recovery of pathogens other than Group A Strep, use 'Culture, Aerobic with Sensitivities (AERS).
Specimen Stability Information
Specimen Type Temperature Time
​Swabs ​ Room Temp​ <= 4 hours​
​Refrigerate ​> 4 hours
Rejection Criteria
Dry swab
Specimens other than throat, perianal, rectal, vaginal​
​Leaking specimens
​Specimens older than 4 days
Test Information
‘ESwab’ is a trademark of Copan Diagnostics.
Reference Range Information
Performing Location Reference Range
All Performing Sites Negative for Group A Beta Hemolytic Strep​
For more information visit:
Performing Laboratory Information
Performing Location Day(s) Test Performed Analytical Time Methodology/Instrumentation
Diagnostic Treatment Center​ ​Monday through Sunday​ ​2 days ​Conventional culture, standard susceptibility testing, manual or automated identification methods.
​Marshfield Monday through Sunday​ 3 days​ Conventional culture, manual or automated identification methods, and nucleic acid sequence analysis as needed.
For billing questions, see Contacts
Outreach CPTs
CPT Modifier
(if needed)
Quantity Description Comments
87081​ Culture​
87077​ Aerobic isolate, definitive ID ​as needed
87147​ Immunologic method, per antiserum ​as needed
​87153 ​Identification by nucleic acid sequencing method ​as needed
For most current information refer to the Marshfield Laboratory online reference manual.