Diagnosis of perianal cellulitis
Screening patients and health care workers for Streptococcus pyogenes for the purpose of investigating possible nosocomial transmission
Test Id | Reporting Name | Available Separately | Always Performed |
---|---|---|---|
RMALD | Ident by MALDI-TOF mass spec | No, (Bill Only) | No |
GID | Bacteria Identification | No, (Bill Only) | No |
STRP | Identification Streptococcus | No, (Bill Only) | No |
ISAE | Aerobe Ident by Sequencing | No, (Bill Only) | No |
SIDC | Ident Serologic Agglut Method 4 | No, (Bill Only) | No |
When this test is ordered, the reflex tests may be performed at an additional charge.
Conventional Culture Technique
62989 - CGAS
Beta-Hemolytic Strep
Beta-Hemolytic Streptococcus
Group A Strep
Group A Streptococcus
Strep Group A
Streptococcus Group A
Streptococcus pyogenes
S. pyogenes
GAS
Beta Strep
Perianal cellulitis
SGA
When this test is ordered, the reflex tests may be performed at an additional charge.
Varies
Specimen source is required.
Submit only 1 of the following specimens:
Preferred:
Specimen Type: Rectal, perirectal, perianal, or anal
Supplies: Culturette (BBL Culture Swab) (T092)
Container/Tube: Culture transport swab (Dacron or rayon swab with aluminum or plastic shaft with either Stuart or Amies liquid medium)
Specimen Volume: Swab
Additional Information: Primarily to be collected from pediatric patients
Acceptable:
Specimen Type: Vaginal
Supplies: Culturette (BBL Culture Swab) (T092)
Container/Tube: Culture transport swab (Dacron or rayon swab with aluminum or plastic shaft with either Stuart or Amies liquid medium)
Specimen Volume: Swab
Additional Information: Submission of a vaginal source is limited to Infection Prevention and Control test orders
Specimen Type: Throat or pharynx
Supplies: Culturette (BBL Culture Swab) (T092)
Container/Tube: Culture transport swab (Dacron or rayon swab with aluminum or plastic shaft with either Stuart or Amies liquid medium)
Specimen Volume: Swab
Additional Information: Submission of throat or pharynx sources is limited to Infection Prevention and Control test orders
Specimen Type: Skin or wound
Supplies: Culturette (BBL Culture Swab) (T092)
Container/Tube: Culture transport swab (Dacron or rayon swab with aluminum or plastic shaft with either Stuart or Amies liquid medium)
Specimen Volume: Swab
Additional Information: Submission of skin or wound sources is limited to Infection Prevention and Control test orders
Dry swab | Reject |
Specimen Type | Temperature | Time | Special Container |
---|---|---|---|
Varies | Ambient (preferred) | 24 hours | |
Refrigerated | 24 hours |
Diagnosis of perianal cellulitis
Screening patients and health care workers for Streptococcus pyogenes for the purpose of investigating possible nosocomial transmission
When this test is ordered, the reflex tests may be performed at an additional charge.
Streptococcus pyogenes (group A streptococcus) is a common cause of pharyngitis and skin and soft tissue infection. In children, S pyogenes can cause perianal infection. The classic presentation is a well-demarcated rash around the anus with itching, rectal pain, and, occasionally, blood-streaked stools. Untreated, painful defecation, toilet avoidance, and constipation may persist for months, until effective treatment is administered. Anal fissures may ensue. A swab of the affected area may be submitted for S pyogenes culture to confirm the diagnosis.
Health care workers may transmit S pyogenes to their patients (eg, in the postsurgical setting) leading to outbreaks of invasive disease. Screening of health care workers or other patients for S pyogenes may be requested by Infection Prevention and Control as part of an investigation of a potential nosocomial case (or cases). Isolates may be typed to assess strain relatedness.
Negative
Positive cultures are reported out as Streptococcus pyogenes.
No significant cautionary statements
1. Spellerberg B, Brandt C, Sendi P: Streptococcus. In Manual of Clinical Microbiology. 12th edition. Edited by KC Carroll, MA Pfaller. Washington DC, ASM Press 2019, pp 399-417
2. Cohen R, Levy C, Bonacorsi S, et al: Diagnostic Accuracy of Clinical Symptoms and Rapid Diagnostic Test in Group A Streptococcal Perianal Infections in Children. Clin Infect Dis 2015 Jan 15;60:267-270
Specimens are cultured to a sheep blood agar plate and/or a Columbia colistin-nalidixic acid agar plate as appropriate based on the anatomic location. Cultures are incubated for 2 days. Streptococcus pyogenes or no growth of S pyogenes is reported.(Church DL: Group A Streptococcus: Culture and Nonculture Tests. In Clinical Microbiology Procedures Handbook. Edited by AL Leber. ASM Press 2016, section 3.11.8)
Monday through Sunday
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.
87081-Strep Grp A (S. pyogenes) culture
87077-Ident by MALDI-TOF mass spec (if appropriate)
87077-Bacteria identification (if appropriate)
87077-Identification Streptococcus (if appropriate)
87147 x 2-6-Serologic Agglut Method 4 Ident (if appropriate)
87153-Aerobe ident by sequencing (if appropriate)
Test Id | Test Order Name | Order LOINC Value |
---|---|---|
CGAS | Grp A Strep (S. pyogenes) Culture | 17656-0 |
Result Id | Test Result Name |
Result LOINC Value
Applies only to results expressed in units of measure originally reported by the performing laboratory. These values do not apply to results that are converted to other units of measure.
|
---|---|---|
CGAS | Grp A Strep (S. pyogenes) Culture | 17656-0 |