A
new article (by Tim Sandle) of interest:
Abstract: This paper
discusses the use in dental practices of quaternary ammonium compounds (QAC)
and alcohol-based disinfectants in relation to bactericidal efficacy against
mycobacteria. QAC disinfectants are commonly used in dental practices, although
there are concerns about their efficacy against tuberculosis-causing bacteria.
The paper discusses a recent study where two QAC products (ready-to-use and
saturated wipe liquor presentations) were tested, using a recognized suspension
test, at the manufacturer’s recommended concentration, under simulated ‘clean’
and ‘dirty’ conditions. The test data indicated that, after a 10-minute contact
time, suitable kill of the test organism was not
obtained. These findings raise questions about the suitability of QAC
disinfectants for dental practices.
CPD/Clinical
Relevance:
Tuberculosis, a disease caused by Mycobacterium tuberculosis, is increasingly becoming
a communicable disease of concern. It is important that dental practices ensure
that a suitable level of decontamination takes place between patients. QAC disinfectants
may not be suitable for this purpose and alternative biocides, like alcohol,
may need to be considered.
The
reference is:
Posted by Dr. Tim Sandle
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Pharmaceutical Microbiology