Batch spore testing told this BC office on Friday about loads that left the chairs on Monday; a daily biological indicator answers that before the first patient sits down. Nothing was added to the bench except one tube and one log line per sterilizer. In our modelled example the extra work came to about two minutes per unit per day.
Quick facts
- A biological indicator is the only in-house check that uses live spores.
- A 24-hour self-contained tube is read at the time its own instructions state.
- One tube per sterilizer per working day is roughly 250 tubes a year.
- The log line that matters ties a result to a unit and a cycle.
- Tape and chemical indicators report process conditions, not a cadence.
Case review: autoclave biological spore testing british columbia in practice
The practice is a three-chair BC office with two benchtop steam sterilizers. Monitoring was a Friday batch job: one indicator per unit, one log line.
Then a weekly result came back showing growth. The honest answer to "which loads are affected?" was "everything since the last passing test" — a week of instruments already used. The re-test passed, but the log could not name the cycle that failed; that gap pushed the switch, and the handling steps sit in the dental compliance hub.
What the guidance asks for
how often to do spore test in dental office rcdso
In Ontario, the RCDSO requires a biological indicator for each sterilizer on every day it is used — daily monitoring, not weekly. The weekly baseline is the CDC / AAMI ST79 standard in most US states.
BC offices follow their own provincial college guidance and the sterilizer's instructions for use; the background on what a tube shows is in Biological Indicators: Spore Testing Protocols for Clinics.
Before and after: cadence, log fields and staff time
| What changed | Before: weekly batch | After: daily monitoring |
|---|---|---|
| Test cadence | One indicator per sterilizer weekly | One indicator per sterilizer each working day |
| Exposure window | Up to a week of loads unknown | At most one working day of loads |
| Log fields | Date, result, initials | Date, sterilizer ID, cycle, lot, incubator, read time, result |
| Staff time (modelled) | Ten minutes a week | Two minutes per unit per day |
The time figures are a modelled example, not a time study; your numbers depend on units run.
Log fields changed most: a weekly pass line names neither unit nor cycle, so it cannot support a root-cause conversation.
Building the daily routine
What changed when they monitored each day the sterilizer is used
One tube goes through the cycle with the load in the position the instructions describe; an unprocessed control from the same lot stays aside. Both are incubated and read at the stated time.
An incubator has to hold every tube plus the control. The CliniEco 24-Hour Biological Indicator Incubator is a 24-well dry block.
Stock planning follows the cadence: one tube per unit per working day is roughly 250 a year, so a 50-pack covers about ten weeks. To run the pattern first, the CliniEco 24h Biological Indicator — 5-Pack Trial ships with shipping included.
What they would do differently
Write the failure playbook before the first daily test, and label tubes while loading so every well traces back to a unit.
Review the log weekly, not at inspection time, so a drifting unit shows up before service is booked.
Ordering for a clinic, lab or care home? Wholesale and multi-site ordering covers case pricing and account setup, and the B2B wholesale collection lists the lines stocked for institutional buyers.
Related reading
Two follow-ups come up most often.
- Autoclave Spore Test FAQ — incubation and failed results.
- Spore test frequency after a major sterilizer repair — what changes after service.
- Rapid Readout Biological Indicator Readers: Every Major Brand Compared (2026 Canada Price Guide)
- BI vs Chemical Indicators: What's the Difference in Sterilization Monitoring?
- The Real Annual Cost of Biological Monitoring: Locked Ecosystems vs Open-System BIs in Canadian Dental Clinics
- sterilization compliance log sheet (free tool)
- printable autoclave sterilization log sheet (free)
Frequently Asked Questions
Does a daily biological indicator replace indicator tape and pouches?
No. Tape and chemical indicators show that process conditions were reached; the spore-based tube is the one you incubate and record.
What should a daily sterilization log record?
Date, sterilizer ID, cycle number, lot, incubator, read time, result and initials. Unit and cycle are the fields that make the record usable later.
What should happen when a daily indicator shows growth?
Quarantine loads processed since the last passing result, re-test the unit, check loading and gaskets, then document. If a repeat also shows growth, take the unit out of service. Our Autoclave Spore Test FAQ covers failed results.
Can one incubator serve two sterilizers?
Yes, if it holds every tube plus a control and the records stay separate for each unit. Label each tube at loading.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
0 commentaire