Evaluation of the Significance of Constant Laser Therapy, 532 nm, in Various Exposure Times on the Healing Process of Wounds Infected byAcinetobacter baumannii

Abstract

Many considerable investigations focused on the stimulation of therapeutic manners of infected injuries in mice. The exaggerated pathogens that induced wounds were gram-positive like staphylococcal and gram-negative, for example, Pseudomonas aeuroginosa and Acinetobacter baumannii. Acinetobacter can generate a scale range of an infection that may be received in a hospital or any wellness concern facility. In order to know the significance of laser 532 nm with a constant irradiance at various exposure times on the healing process of wounds infected by Acinetobacter baumannii, this study was performed on the BALB/C mice. An elliptical full-thickness skin injury was made on the backside of 45 adult female (BALB/C) mice. Injuries were affected via Acinetobacter baumannii and were randomly assigned into 3 groups. Semiconductor diode continuous wave laser, λ = 532 nm, with output power 40 mW was used. The power density was 5.71 mW/cm2, while the fluencies were 1.7 J/cm2 and 5.14 J/cm2. Fifteen mice were classified according to the times of irradiation. The first group was infected and presented as control, without irradiation. The second group was infected and irradiated for 5 minutes. The third group, likewise, was infected but irradiated for 15 minutes. All groups were subdivided according to the following period, 3, 5, and 10 days, after irradiation and the animals were killed after the treatment. Wound healing was made by measuring the rate of wound closure and histopathological evaluation. The study determined that 532 nm laser therapy had an obvious and positive influence on the healing of infected wounds with fluence (5.14 J/cm2).

The Effects of Multiple Power Densities of Carbon Dioxide Laser on Photothermal Damage in Rat Skin Tissue

“…The water in the skin evaporated as a result of the laser irradiation, carbonizing the skin. This resulted from the laser's stimulation and disintegration as it reached the skin [15,16].…”

Cancer Treatment Based on the Selective Accumulation of a Photosensitiser and Laser Light Irradiation: A Review

“…These are significant defining factors for chemotherapeutics or radiotherapeutics. 5,6 The cell destruction is the consequence of the photochemical irritation of the photosensitizers that produce reactive oxygen species (ROS) particularly in the reduction of oxygen by the electron transfer system of mitochondria that has a damaging influence on cell organelles and molecules required for normal cell functioning. The normal cells remain unaffected due to sub cellular localization of *Correspondence: AL-Timimi Zahra, Laser Physics-College of Science for Women, Babylon University, Ira, email: dr. altimimizahra@gmail.com ORCID: 0000-0002-3209-553X Bangladesh Med Res Counc Bull 2020; 46:150-153 photosensitisers selectively in tumour cells.…”

“…The normal cells remain unaffected due to sub cellular localization of *Correspondence: AL-Timimi Zahra, Laser Physics-College of Science for Women, Babylon University, Ira, email: dr. altimimizahra@gmail.com ORCID: 0000-0002-3209-553X Bangladesh Med Res Counc Bull 2020; 46:150-153 photosensitisers selectively in tumour cells. 7,8 Apoptosis, necrosis and autophagy are a biological mechanism which have all been identified as Programmed Cell Death (PCD) mechanisms during PDT 9,10 . .…”