Fusobacterium Selective Agar – FSA

Fusobacterium Selective Agar – FSA

Fusobacterium Selective Agar (FSA) is an enriched selective medium for the isolation and presumptive identification of Fusobacterium species.

FSA Agar Plate

F. necrophorum (ATCC 25286) Growing On FSA Agar Plate

4 plates per package

Catalog #
AS-6427 FSA mono plate 4 plates

Non-stock item: 25 pack minimum order, allow 2-4 weeks for delivery.

FSA Product InsertFSA SDS

Product Description & Summary

FSA agar is an enriched selective media used for the isolation of Fusobacterium species. The nutritive base consists of casein, soy peptone, meat peptone, yeast extract, and dextrose. Dithiothreitol facilitates the lowering of the redox potential of the medium. The selective agents include josamycin, vancomycin, and neomycin at concentrations that inhibit most facultative and obligate anaerobes. This medium is prepared, dispensed, and packaged under oxygen-free conditions to prevent the formation of oxidized products prior to use.

Interpretation of Results & Limitations

If used properly, FSA agar supports the growth of most Fusobacterium species found in clinical specimens while inhibiting most facultative and obligate anaerobes.

FSA agar will not provide complete information for identification of bacterial isolates. Additional test procedures and media are required for complete identification. Some organisms that would normally grow on FSA medium may be inhibited. It is recommended that a non-selective medium, such as Brucella Blood Agar (BRU, catalog #: AS-111) also be inoculated from the same clinical specimen to assure recovery of all species present. Consult reference materials for additional information.

Quality Control

The following organisms are routinely used for quality control performance testing at Anaerobe Systems.

Organism Tested ATCC # Results Time
Fusobacterium nucleatum 25586 Growth 24 – 48 hrs
Fusobacterium necrophorum 25286 Growth 24 – 48 hrs
Staphylococcus aureus 25923 No Growth
Prevotella melaninogenica 25845 No Growth
Bacteroides fragilis 25285 No Growth
Peptostreptococcus anaerobius 27337 No Growth
Clostridium perfringens 13124 No Growth
Clostridium difficile or

Propionibacterium acnes



No Growth


Product Storage & Shelf Life

Storage: Upon receipt, store at room temperature in original package until used. Avoid overheating or freezing. Do not use media if there are signs of deterioration (shrinking, cracking, or discoloration due to oxidation of media) or contamination. The expiration date applies to the product in its original packaging and stored as directed. Do not use product past the expiration date shown on the label.

Shelf Life: 90 days from date of manufacture.