Background: Many studies consider the contamination of dental unit waterlines (DUWLs), but few of them have studied the possible presence of antibiotic resistant in the DUWLs.
Aims: Investigation of the presence of and spp. strains in DUWLs and evaluation of their resistance to six antibiotics (ceftazidime, netilmicin, piperacillin/tazobactam, meropenem, levofloxacin, colistin sulfate) at a public dental clinic in Milan, Italy.
Results: Dental units were contaminated by with loads of 2-1,000 CFU/L and were mainly located on the mezzanine floor, with a range of 46-54%, while spp. were primarily found on the first and second floors, ranging from 50 to 91%. was antibiotic resistant in 30% of the strains tested, and spp. in 31.8% . Cold water from controls was also contaminated by these microorganisms.
Conclusion: Monitoring antibiotic resistance in the water and adopting disinfection procedures on DUs are suggested within the Water Safety Plan.
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| http://dx.doi.org/10.1080/20002297.2022.2107316 | DOI Listing |
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