ArticleAntimicrobial resistance and infection control2025
Susceptibility of Acinetobacter baumannii isolates from different sources to biocides: a matter of biofilm.
Article in Antimicrobial resistance and infection control, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Acinetobacter baumannii is an opportunistic pathogen causing severe infections in patients residing in intensive care units. The ability of A. baumannii to acquire carbapenem-resistance makes these infections difficult to treat and poses a serious risk for global health. In fact, carbapenem-resistant A. baumannii isolates belonging to eleven international clones (IC1-11), especially IC2, have disseminated globally, generating outbreaks and epidemics. Persistence of A. baumannii in nosocomial settings is favored by its ability to produce biofilm and resist to biocides. However, investigations analyzing the efficacy of biocides by determining the minimum bactericidal concentration (MBC) on field A. baumannii isolates are rare. We determined the MBC of five commonly used biocides (hydrogen peroxide, ethanol, sodium hypochlorite, chlorhexidine digluconate, and benzalkonium chloride) adapting the EN1040 and EN1276 standard methods on 64 A. baumannii isolates collected from human hospital settings and diseased animals (multidrug resistant) and from food (multidrug susceptible). The 64 isolates belonged to diverse sequence types, some of them being part of ICs (IC2, IC7, IC9 and IC11). Efficacy of biocides was evaluated in presence of an interfering substance (bovine serum albumin, BSA) to simulate dirtiness, but also on in vitro formed biofilms. MBC
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