Table 1 Search strategy

#1

Pseudomonas aerugnosa [tw] or Pseudomonas [tw] or P. aeruginosa [tw] or Pseudomonadaceae [tw] or Gram-negative bacteria [tw] or gram negative [tw] or bacteria [tw] or Pseudomonas aerugnosa [mesh] or Pseudomonas [mesh]

#2

Intensive care unit [tw] or intensive care units [tw] or ICU [tw] or ICUs [tw] or intensive care [tw] or intensive care units [mesh] or respiratory care units [mesh]

#3

Carriage [tw] or colonization [tw] or colonisation [tw] or acquisition factors [tw] or infection [tw] or contamination [tw] or infected patients [tw] or asymptomatic Infections [mesh] or infections [mesh]

#4

Water [tw] or water tap [tw] or tap [tw] or bed [tw] or gloves [tw] or hands [tw] or environmental [tw] or environment [tw] or exogenous factors [tw] or Sink [tw] or care material [tw] or drains [tw] or surfaces water [mesh] or beds [mesh] or protective gloves [mesh] or environment [mesh]

#5

#3 or #4

#6

#1 and #2 and #5

#7

Date: from inception to December 31st, 2020

#8

No language restriction

#9

#6 and #7 and #8