Titre de l'article sujet de la Lecture critique Boyle MAa, Kearney ADa, Sawant Bb, Humphreys Ha,c. Assessing the impact of handwashing soaps on the population dynamics of carbapenemase-producing and non-carbapenemase-producing Enterobacterales. J Hosp Infect. 2020 Aug;105(4):678-681. a-Department of Clinical Microbiology, Royal College of Surgeons in Ireland –Education and Research Centre – Beaumont Hospital – Dublin – Irelandb-Department of Physiology and Medical Physics – Royal College of Surgeons in Ireland – Dublin – Irelandc-Department of Microbiology – Beaumont Hospital – Dublin – Ireland
Carbapenemase-producing bacteria have persistent environmental reservoirs in handwashing sinks. This study assessed the impact of handwashing soaps on the population dynamics of carbapenemase-producing Enterobacterales (CPE) and non-CPE. A number of isolates were grown in minimal media with or without two hand soaps marketed for use in health care. Soap A led to increased growth of all isolates except for Escherichia coli. Soap B did not lead to increased growth. The main difference between the formulations was that Soap B contained DMDM hydantoin, a preservative agent and sensitizer. These results show that environmental persistence of CPE may be sustained by common handwashing practices with soap, but further research is required.