Table 2.

An inventory list of all water containing medical equipment and their corresponding search strings

Water containing medical equipment	Key words	Number of hits on PubMed
Heater-cooler unit	(Heater-cooler OR heater-cooler units OR heater-cooler devices) AND (mycobacterium OR chimaera) Previous search string was not combined with the key words for the heater-cooler unit	72
Fluid warmer	Fluid warmer OR blood warmer OR warming device AND hypothermia	0
Blanketrol	Hypothermia AND Blanket OR blanketrol OR roll OR heat roll	0
Reverse Osmosis/hemodialysis	Reverse osmosis OR hemodialysis OR hemodialysis OR dialysis water OR dialysis OR dialysate OR dialysis fluid	24
Scalp cooling	Chemotherapy OR chemo AND scalp cooling OR cold caps OR cold membrane	0
Incubators	NICU OR neonate OR neonatal unit OR incubator	56
Nebulizers	Nebulizers and vaporizers OR nebulizer*	1
Water traps	Water trap OR ventilator trap OR ventilation circuit OR ventilator OR condensate OR humidifier trap	13
Dental units	Dental unit OR dental stand-alone OR dental water OR dental unit waterline	45
Thermic stimulator	Neuro sensory OR sensory analyser OR sensory analyser or thermic stimulator	0
Water baths	Water baths OR water-baths OR thawing baths AND transfusion OR cryoprecipitate OR thawing OR frozen	1

The number of hits per medical device is not representative of the actual number of outbreaks related to that particular device