Tuesday, 6 December 2016

Quaternary Ammonium Compound Disinfectants against Mycobacteria


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 article can be accessed here: Dental Update

The reference is:

Sandle, T. (2016) Evaluation of Quaternary Ammonium Compound Disinfectants  against Mycobacteria in Dental Practices, Dental Update, 43, 723-726

Posted by Dr. Tim Sandle