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HelpTest Code FBL Fungal Culture, Blood
Reporting Name
Fungal Culture, BloodUseful For
Diagnosis and treatment of the etiologic agents of fungemia
Reflex Tests
| Test ID | Reporting Name | Available Separately | Always Performed |
|---|---|---|---|
| D2F | D2 Fungal Sequencing Identification | No, (Bill Only) | No |
| FUNA | Fungal Ident Panel A | No, (Bill Only) | No |
| FUNB | Fungal Ident Panel B | No, (Bill Only) | No |
| RMALF | Id MALDI-TOF Mass Spec Fungi | No, (Bill Only) | No |
| RMALY | Id MALDI-TOF Mass Spec Yeast | No, (Bill Only) | No |
| ITSF | ITS Fungal Sequencing | No, (Bill Only) | No |
Testing Algorithm
When this test is ordered, reflex testing may be performed at an additional charge.
Method Name
Conventional Broth Culture/Macroscopic/Microscopic/D2 and Internal Transcribed Spacer (ITS) rDNA Gene Sequencing/Matrix-Assisted Laser Desorption/Ionization-Time of Flight Mass Spectrometry (MALDI-TOF MS)
Dimorphic Pathogen Identification Confirmation: D2 and ITS rDNA Gene Sequencing/MALDI-TOF MS
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Specimen Type
Whole bloodSpecimen Required
Container/Tube:
Preferred: Green top (sodium or lithium heparin)
Acceptable: SPS (sodium polyanethol sulfonate)
Specimen Volume: 5 mL
Pediatric Volume: 3 mL
Collection Instructions:
1. Send whole blood specimen in original tube. Do not aliquot.
2. SPS tubes are acceptable but not preferred.
Note: SPS tubes must be clearly labeled as SPS. If label is obscured, sample may be cancelled, as ACD (yellow top) is not an acceptable tube type.
Specimen Minimum Volume
Adults: 1 mL; Pediatrics: 1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Whole blood | Ambient (preferred) | 7 days |
| Refrigerated | 7 days |
Reject Due To
| Blood culture bottles (eg, BACTEC MycoF Lytic) | Reject |
| Isolator | Reject |
| Clotted | Reject |
Reference Values
Negative
If positive, notification is made as soon as the positive culture is detected or identified.
Day(s) Performed
Monday through Sunday
CPT Code Information
87103-Blood
87106-Id MALDI-TOF Mass Spec Yeast (if appropriate)
87107-Id MALDI-TOF Mass Spec Fungi (if appropriate)
87107-Fungal identification panel A (if appropriate)
87107-Fungal identification panel B (if appropriate)
87153-D2 fungal sequencing identification (if appropriate)
87153- ITS Fungal Sequencing (if appropriate)
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| FBL | Fungal Culture, Blood | 601-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| FBL | Fungal Culture, Blood | In Process |
Clinical Information
Due to the high mortality rate from fungemia, the expeditious detection and identification of fungi from the patient's blood can have great diagnostic prognostic importance. Risk factors for fungemia include, but not limited to, extremes of age, immunosuppression, and those individuals with burns or indwelling intravascular devices.
Interpretation
Positive cultures of yeast and filamentous fungi are reported with the organism identification.
Positive cultures are usually an indication of infection and are reported as soon as detected. Correlation of culture results and the clinical situation is required for optimal patient management. A final negative report is issued after 42 days of incubation.
Cautions
No significant cautionary statements
Method Description
Blood is inoculated into a MycoF Lytic culture bottle (Becton Dickinson) bottle and continuously monitored on a blood culture instrument.
Identification of fungi is based on colonial and microscopic morphology, matrix-assisted laser desorption ionization time-of-flight mass spectrometry and/or D2 and internal transcribed spacer (ITS) rDNA gene sequencing, as applicable.(B; Dhiman N, Hall L, Wohlfiel SL, Buckwalter SP, Wengenack NL. Performance and cost analysis of matrix-assisted laser desorption ionization time of flight mass spectrometry for routine identification of yeast. J Clin Microbiol. 2011:49[4];1614-1616; Hall L, Wohlfiel SL, Roberts GD. Experience with the MicroSeq D2 large-subunit ribosomal DNA sequencing kit for identification of filamentous fungi encountered in the clinical laboratory. J Clin Microbiol. 2004;42[2]:622-626; Theel ES, Schmidt BH, Hall L, et al. Formic acid-based direct, on-plate testing of yeast and Corynebacterium species by Bruker Biotyper matrix-assisted laser desorption ionization-time of flight mass spectrometry. J Clin Microbiol. 2012;50[9]:3093-3095; Theel ES, Hall L, Mandrekar J, Wengenack NL. Dermatophyte identification using matrix-assisted laser desorption ionization-time of flight mass spectrometry. J Clin Microbiol. 2011;49[12]:4067-4071; General approaches for direct and indirect detection and identification of fungi. In: Carroll KC, Pfaller MA, Pritt BS, et al. Manual of Clinical Microbiology. 13th ed. ASM Press; 2023)