Search

Background: Acinetobacter baumannii (A. baumannii) is an opportunistic pathogen with high antibiotic resistance and biofilm production capability in the patients with burn wound. The present study aimed to determine the antibiotic resistance pattern and frequency of the multidrug-resistant (MDR) strains, and evaluate biofilm formation potential in the burn wound infection isolates. Methods: Biochemical and molecular tests were used for identification of the 117 strains collected from Isfahan City, Iran, during one-year period. Antibacterial susceptibility test was performed using disk diffusion and interpreted in accordance with the standards of Clinical and Laboratory Standards Institute (CLSI). Biofilm formation was evaluated using microtiter plate assay. Findings: Of 117 clinical strains of A. baumannii, 114 (97.49%) were MDR. Strains showed maximum resistant to ceftazidime (99.14%) followed by ciprofloxacin (94.01%). 81.19% of isolates were able to form biofilm, 1.7% of strains were strong-biofilm producers, and 18.80% of them were notable biofilm producers. In this assessment, 42.73% and 36.75% were considered as moderate and weak biofilm-forming isolates, respectively. Conclusion: The high prevalence of A. baumannii in patients with burn wound, and the significant relationship between biofilm formation and resistance among the burn isolates indicate that antibiotic resistance is increasing rapidly, and soon many usable antibiotics will become ineffective medicines for treating patients. This needs an emergency actions and alternative ways to control these problems.

Background: The skin is always damaged by burns, physical damages, and diseases such as diabetes mellitus. Infection and acute inflammation of wounds caused by burns and diabetes ulcers lead to extensive damage and death. Therefore, it is necessary the design polymeric dressings containing drugs with controlling ability to release the drugs in wound site. Methods: Wound dressing of poly(glycerol sebacate) (PGS)/ polyhydroxybutyrate (PHB) was fabricated by coaxial electrospinning process. These fibers were characterized by scanning electron microscope (SEM) images. The anti-bacterial activity, cell viability (MTT) and cell adhesion were investigated. Findings: The results of SEM showed that the wound fibers were uniform, and with a diameter of 575 ± 40.6 nm. The drugs loaded were separately in the core and shell of fibers. The samples containing drugs showed good bactericidal activity against both of Gram-positive and Gram-negative bacteria. Result of MTT did not show viability, attachment, and growth of cells in wound dressing with drugs. Conclusion: It can be concluded that this wound dressing with the release of two drugs simultaneously is an ideal wound dressing to control the infection, and heal the wound.

Background: Pseudomonas aeruginosa is one of the most important factors for nosocomial infections with percentage of resistance to the drug, particularly in the burn wounds. One of the mechanisms of resistance in these bacteria is chromosomal mutation in the quinolone-resistance-determining region (QRDR) of chromosome gene. The aim of this study was to evaluate gyrA and parC gene mutation in Pseudomonas aeruginosa isolates from burn wound infections resistant to ciprofloxacin. Methods: 50 clinical Pseudomonas aeruginosa isolates were identified from patients admitted to burn hospital. Minimum inhibitory concentrations (MICs) of ciprofloxacin were evaluated by E-test method and polymerase chain reaction-sequencing (PCR-sequencing) method was carried out to assess the gyrA and parC mutations in ciprofloxacin-resistant isolates. Findings: From 50 isolates, 62% were resistant to ciprofloxacin. Mutations were detected in all (100%) and 41 isolates (82%) in gyrA and parC genes, respectively. The most frequent mutations were observed in gyrA gene conversion (T83I) and parC (S87L). No mutation was found in sensitive isolates. Conclusion: Results indicate that mutations in the quinolone-resistance-determining-region are the major mechanisms for ciprofloxacin resistance in clinical isolates of Pseudomonas aeruginosa. Considering the prevalence of these genes, these mutations play a major role in the development of resistance.

Background: The primary goal of wound management is to achieve a functional closure with minimal scarring. One of the ways of wound management is to prescribe prophylactic antibiotics. This study compared single-dose intravenous (IV) prophylactic antibiotic with the common five-day treatment in simple traumatic and contaminated wounds. Methods: All patients with simple traumatic and contaminated wounds that were sutured and determined to have indications for prophylactic antibiotic therapy by a physician at emergency wards of Shohadaye Haftom-e-Tir and Rasoul-Akram Hospitals during working shifts of researchers were divided into two groups. The first group received a single-dose of IV cefazolin and the second group was treated with oral cephalexin for five days. Infection symptoms such as erythema, pus secretion and swelling were described to the patients. Patients were suggested to inform the researchers whenever they saw the symptoms before the exact date of suture removal. Findings: In this research, 150 patients were studied in two groups of 75. The first group received a single-dose IV antibiotic while the second received five days of antibiotic. Infection was observed in 6 (8%) and 7 (9.33%) patients in the first and second group, respectively. However, the two groups were not significantly different in terms of infection rate. Conclusion: The period of prophylactic antibiotic therapy does not seem to make significant differences in treatment of wounds. Therefore, based on the findings of previous studies, as well as ours, it can be concluded that using a single-dose IV prophylactic antibiotic might be preferable because it is more acceptable by patients and has fewer side effects.

Background: The primary goal of wound management is to achieve a functional closure with minimal scarring. One of the ways of wound management is to prescribe prophylactic antibiotics. This study compared single-dose intravenous (IV) prophylactic antibiotic with the common five-day treatment in simple traumatic and contaminated wounds. Methods: All patients with simple traumatic and contaminated wounds that were sutured and determined to have indications for prophylactic antibiotic therapy by a physician at emergency wards of Shohadaye Haftom-e-Tir and Rasoul-Akram Hospitals during working shifts of researchers were divided into two groups. The first group received a single-dose of IV cefazolin and the second group was treated with oral cephalexin for five days. Infection symptoms such as erythema, pus secretion and swelling were described to the patients. Patients were suggested to inform the researchers whenever they saw the symptoms before the exact date of suture removal. Findings: In this research, 150 patients were studied in two groups of 75. The first group received a single-dose IV antibiotic while the second received five days of antibiotic. Infection was observed in 6 (8%) and 7 (9.33%) patients in the first and second group, respectively. However, the two groups were not significantly different in terms of infection rate. Conclusion: The period of prophylactic antibiotic therapy does not seem to make significant differences in treatment of wounds. Therefore, based on the findings of previous studies, as well as ours, it can be concluded that using a single-dose IV prophylactic antibiotic might be preferable because it is more acceptable by patients and has fewer side effects. [ABSTRACT FROM AUTHOR]