Spore Testing Gap and a Hepatitis C Exposure
A solo dental practice in Missouri has two autoclaves. The office policy says biological spore testing is done 'monthly,' but the log shows the last test was 11 weeks ago. The hygienist notices that the older autoclave's door gasket is cracked and that packs sometimes come out wet. She has been drying them with a paper towel and placing them in an open drawer with non-sterile supplies. She also uses a high-level disinfectant wipe on a metal mouth mirror between patients when the autoclave is full, because the mirror 'only touches saliva.' On Friday, a patient calls to report that she was diagnosed with acute hepatitis C. The patient had a prophylaxis two weeks earlier. The hygienist remembers a needlestick during that visit but did not report it. The dentist tells her not to worry because 'hep C is bloodborne and we wore gloves.'
1. Identify the infection-control breaches and the correct standard for each.
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- Spore testing: The log shows 11 weeks without biologic monitoring. The CDC standard and the board's infection-control expectations call for at least weekly spore testing of each autoclave, with documentation and maintenance when a test fails. Monthly is not enough.
- Autoclave maintenance: A cracked gasket and wet packs mean the sterilizer is not functioning properly. Wet packs are considered contaminated because moisture can wick organisms through packaging. Drying with a paper towel does not sterilize them.
- Storage: Sterile packs must be stored dry, closed, and separate from non-sterile supplies. An open drawer with non-sterile items defeats the package.
- Mouth mirror: A mirror is semicritical because it contacts oral mucosa. It must be sterilized or, if heat-sensitive, receive high-level disinfection; a disinfectant wipe between patients is not a substitute when the item is heat-stable.
- Needlestick: The hygienist failed to report a bloodborne exposure. The office must have an exposure control plan and post-exposure evaluation.
2. What should the hygienist do now about the needlestick and the patient's hepatitis C diagnosis?
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She should report the needlestick immediately under the office exposure-control plan, seek confidential medical evaluation, and document the date, device, and circumstances. Hepatitis C is bloodborne; gloves reduce but do not eliminate needlestick risk. The office should review the sterilization and exposure logs for the period and determine whether other patients were placed at risk. The dentist should not dismiss the report. The hygienist should not identify the patient to coworkers. If the office will not act, she should contact the board and follow OSHA and medical guidance. She should also preserve the autoclave records and not rewrite the log.
3. What board rule or statutory basis could support discipline, and what sanction range is realistic?
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Missouri's dental practice act allows discipline for unprofessional conduct, incompetence, and failure to comply with infection-control standards. The board can also act on failure to maintain equipment or to protect patients. Realistic outcomes range from a reprimand and CE in infection control to probation with monitoring; suspension is possible if patients were actually exposed or the office concealed the breach. The board's complaint would likely go to the Administrative Hearing Commission for a hearing if contested, and the board would decide the sanction after findings. The hygienist's best defense is immediate correction, honest documentation, and evidence of remediation.