The strongest purchasing decision connects the catalogue item to the method, documentation, storage capacity, and expected workload. This guide uses the manufacturer IFU for catalogue 88008 as its technical anchor and translates it into practical review questions for professional laboratories.
Start with the product’s documented role
Aesculin Bile Test is used to differentiate Enterococci and Lancefield group D streptococci (Streptococcus bovis group) from other streptococci based on the ability of microorganisms to hydrolyze aesculin. KIT CONTENT • 30 Tubes of Aesculin Bile Test
Review Liofilchem Aesculin Bile Test 88008 at Kormay Biomedicals
Design the workflow before opening the pack
Define the sample type, inoculum or preparation step, incubation conditions, control organisms, reading window, confirmation pathway, and acceptance criteria in the SOP. Record the catalogue number, lot, expiry, analyst, equipment, and any deviation that could change interpretation.
Procedure points worth controlling
1. Take the number of Aesculin Bile Test tubes needed from the fridge and allow them to reach room temperature. 2. Add 0.3 mL of physiological solution to each tube. 3. Using a sterile loop, pick up one or more than one well isolated colony from a fresh culture plate (18-24 hours old) to inoculate the test tube. 4. Incubate at 35 ± 2°C for up to 24 hours. 5. Examine tubes after 4 hours incubation and at regular intervals for broth colour change. Note: Positive and negative controls should be run simultaneously with the organism to be tested (see
Read and document the result
A positive aesculin hydrolysis test is indicated by a colour change to dark brown. No colour change is considered as a negative reaction.
Quality control as a decision tool
organisms. REAGENTS • Each tube contains desiccated nutritive components, biochemical substrates (i.e. aesculin and iron salts) and selective agents (i.e. bile and sodium azide). SPECIMEN Collect specimens in sterile containers or with sterile swabs and transport to the laboratory. Process each specimen using procedures appropriate for that sample. This product is recommended for use only with pure cultures. Refer to specific guidelines for more detailed information.
Storage and handling
2-8°C in its original packaging. Keep away from sources of heat and avoid excessive changes of temperature. Use until the expiry date indicated on the label. Eliminate without using if there are signs of deterioration.
Know when the result needs confirmation
Due to nutritional variation, some strains may result in poor growth or fail to grow on this medium providing false negative results. H2S produced by various organisms during metabolism, may react with iron to produce a black complex which interferes with the
Safety and professional-use reminder
1) For in vitro diagnostic use (IVD). 2) For laboratory professional use only. 3) Operators must be trained and have certain experience. Please read the instructions carefully before using the product. Reliability of assay results cannot be guaranteed if there are any deviations from the instructions in this document. 4) Consult the Safety Data Sheet (SDS) for information regarding hazards and safe handling practices. 5) Do not use if the product or packaging appears to be damaged. 6) Follow standard
A practical pre-release checklist
- Current IFU revision and catalogue code verified
- Receipt, storage, lot, and expiry documented
- Controls and acceptance criteria defined before testing
- Reading time and observations recorded without forcing an ambiguous endpoint
- Confirmation and deviation actions linked to the laboratory SOP
Final perspective
Useful technical content should help a laboratory make a better-controlled decision, not replace the IFU or validated method. Confirm the current manufacturer documentation and local regulatory requirements before implementation.