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:  Acinetobacter baumannii  strains are important agents causing serious nosocomial infections including soft-tissue and skin infections in patients with burn wounds which have become resistant to several classes of antibiotics. Antimicrobial photodynamic therapy (aPDT) as an alternative antimicrobial procedure is suggested for the treatment of these kinds of infections. The aim of the current study is to evaluate the antibacterial and anti-biofilm efficiency of aPDT by the utilization of an improved form of indocyanine green (ICG) which is encapsulated in chitosan nanoparticles (NCs@ICG).  Methods : NCs@ICG were synthesized and confirmed by the scanning electron microscope (SEM). aPDT was performed using NCs@ICG with an 810 nm wavelength of the diode laser at the fluency of 31.2 J/cm 2  on 50  A. baumannii  strains isolated from burn wounds. The antibacterial and antibiofilm potential of NCs@ICG-aPDT was determined via the colony forming unit (CFU)/mL and crystal violet assays, respectively. In addition, microbial biofilm degradation was evaluated by the SEM.  Results : According to the results, NCs@ICG-aPDT showed a significant reduction of 93.2% on the CFU/ mL of planktonic  A. baumannii  strains compared to the control group (untreated group;  P    0.05). Based on the results of SEM images, NCs@ICG-aPDT disrupted the biofilm structure of  A. baumannii  strains more than other groups.  Conclusion : NCs@ICG-aPDT demonstrates a promising treatment candidate for exploitation in wound infections against both planktonic and biofilm forms of  A. baumannii  strains

journal of lasers in medical sciences

Photoelimination Potential of Chitosan NanoparticlesIndocyanine Green Complex Against the Biological Activities of <i>Acinetobacter baumannii</i> Strains: A Preliminary In Vitro Study in Burn Wound Infections

Photoelimination Potential of Chitosan NanoparticlesIndocyanine Green Complex Against the Biological Activities of Acinetobacter baumannii Strains: A Preliminary In Vitro Study in Burn Wound Infections