Naslov
Metal-loaded zeolite remediation of soils contaminated with pandrug-resistant Acinetobacter baumannii

Autori
Hrenović, Jasna ; Dekić, Svjetlana ; Dikić, Jelena ; Kazazić, Snježana ; Durn, Goran ; Rajić, Nevenka

Izvornik
Arhiv za higijenu rada i toksikologiju (0004-1254) 71 (2020), 2; 146-151

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
copper ; environment ; natural zeolite ; pathogens ; public health ; silver

Sažetak
Due to the development of resistance to antimicrobial agents, bacterium Acinetobacter baumannii is nowadays a leading cause of nosocomial outbreaks. Clinically relevant A. baumannii outside hospital settings including natural soils affected by human waste represents a public-health risk for humans and animals. The aim of this study was to investigate the potential of metal-loaded zeolites to eliminate viable A. baumannii from artificially contaminated natural soils. A. baumannii isolate was subjected to the activity of natural zeolitised tuff (NZ) and Cu-modified (CuNZ) or Ag-modified zeolite (AgNZ) in wet, slightly acidic terra rossa and slightly alkaline red palaeosol. A. baumannii survived in terra rossa and red palaeosol supplemented with 1 wt% of NZ for seven days and four months, respectively. The addition of 1 wt% of CuNZ to terra rossa and red palaeosol shortened the survival of A. baumannii to three and 14 days, respectively. The addition of 0.1 wt% of AgNZ to both soils resulted in complete removal of viable A. baumannii within 1 h of contact, while the total native heterotrophic bacterial counts remained high. Since AgNZ is prepared with a simple modification of cost-effective and environmentally friendly natural zeolite, it is a promising material for the remediation of soils contaminated with pandrug-resistant A. baumannii.

Izvorni jezik
Engleski

Znanstvena područja
Geologija, Kemija, Biologija

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