The Journal of hospital infection · 2022
Vermamoeba vermiformis resides in water-based heater-cooler units and can enhance Mycobacterium chimaera survival after chlorine exposure.
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Sarink M J, van Cappellen W A, Tielens A G M, van Dijk A, Bogers A J J C, de Steenwinkel J E M, Vos M C, Severin J A, van Hellemond J J
Аннотация
BACKGROUND: Mycobacterium chimaera colonizes water-based heater-cooler units (HCUs), from which it can spread to patients during surgery. Vermamoeba vermiformis is a free-living waterborne amoeba, which was consistently present within HCUs.
AIM: To determine whether these amoebae can be involved in the persistent presence of M. chimaera.
METHODS: An in-vitro disinfection model.
FINDINGS: Increased survival of M. chimaera was observed after chlorine exposure in the presence of V. vermiformis. Confocal microscopy demonstrated the intracellular presence of M. chimaera in V. vermiformis.
CONCLUSION: In this way, V. vermiformis can contribute to the persistent presence of M. chimaera in HCUs. Cleaning and disinfection protocols should take this phenomenon into account.
AIM: To determine whether these amoebae can be involved in the persistent presence of M. chimaera.
METHODS: An in-vitro disinfection model.
FINDINGS: Increased survival of M. chimaera was observed after chlorine exposure in the presence of V. vermiformis. Confocal microscopy demonstrated the intracellular presence of M. chimaera in V. vermiformis.
CONCLUSION: In this way, V. vermiformis can contribute to the persistent presence of M. chimaera in HCUs. Cleaning and disinfection protocols should take this phenomenon into account.