Extensive environmental contamination with carbapenem-resistant Acinetobacter baumannii

Posted

7th September 2018

Research

study from Singapore has highlighted extensive environmental contamination with carbapenem-resistant Acinetobacter baumannii in the ICU. This reinforces the need for enhanced environmental measures to reduce the transmission of carbapenem-resistant Acinetobacter baumannii in the ICU setting.

Carbapenem-resistant Acinetobacter baumannii is in many ways a scary organism: it’s highly resistant to antibiotics with few therapeutic options left in some cases, seems to spread readily in ICUs and burns units, and has an extraordinary ability to survive in the dry environment. One study reported that A. baumannii can survive for more than a year on dry surfaces – and that’s without a water or nutrient source!

During an outbreak of carbapenem-resistant Acinetobacter baumannii in an ICU in Singapore, the team performed a point prevalence survey of patient colonisation / infection and environmental contamination with carbapenem-resistant Acinetobacter baumannii. Environmental contamination was identified in 28% (5/18) of the rooms on the ICU. Whole genome sequencing found that environmental isolates were closely related to the patient in the room, but differed between rooms. This suggests that the environmental isolates originated from the patient in the room.

These findings reinforce the need for enhanced disinfection when dealing with carbapenem-resistant Acinetobacter baumannii, especially at the time of patient discharge. This will reduce the risk that contaminated surfaces become a reservoir for room-to-room transmission of carbapenem-resistant Acinetobacter baumannii.

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