Antimicrobial Efficacy and Synergy of Metal Ions against Enterococcus faecium, Klebsiella pneumoniae and Acinetobacter baumannii in Planktonic and Biofilm Phenotypes

The effects of metal ion solutions (silver, copper, platinum, gold and palladium) were determined individually and in combination against Enterococcus faecium, Acinetobacter baumannii and Klebsiella pneumoniae. Platinum, gold and palladium showed the greatest antimicrobial efficacy in zone of inhibition (ZoI) assays. When tested in combinations using ZoI assays, gold/platinum, gold/palladium and platinum/palladium were indicative of synergy. Microbial inhibitory concentration demonstrated platinum and gold against Enterococcus faecium, platinum against Klebsiella pneumoniae and platinum and silver against Acinetobacter baumannii were optimal. Minimal bactericidal concentrations determined the greatest bactericidal activity was again platinum gold and palladium against all three bacteria. Fractional Inhibitory Concentration (FIC) studies demonstrated that the silver/platinum combination against Enterococcus faecium, and silver/copper combination against Acinetobacter baumannii demonstrated antimicrobial synergy. Following crystal violet biofilm assays for single metal ion solutions, antimicrobial efficacies were demonstrated for all the metals against all the bacteria Synergistic assays against biofilms demonstrated gold/palladium, gold/platinumand platinum/palladium resulted in the greatest antimicrobial efficacy. Overall, platinum, palladium and gold metal ion solutions in individual use or combination demonstrated the greatest antimicrobial efficacies against planktonic or biofilm bacteria. This work demonstrates the potential for using a range of metal ions, as biocidal formulations against both planktonic or biofilm bacteria

Gold and gold-palladium coated polypropylene grafts in a S-epidermidis wound infection model

WOS: 000235771200010PubMed: 16139304Background. The use of non-absorbable mesh grafts in both abdominal wall defects and inguinal hernias are impossible in the presence of contamination. This study was conducted for evaluation of the efficiencies of polypropylene mesh grafts coated with gold and palladium-gold. Materials and methods. Ten piece of 1 x 2 cm. of polypropylene mesh grafts were used in each group of naive, gold-coated, and palladium-gold-coated. The grafts were incubated in physiological saline buffered and 0.5 McFarland slime positive Staphylococcus epidermidis for 24 h. At intervals of 6,12,24,48, 72 h grafts were washed with saline and vortexed for 2 min in 2 ml of physiological saline. There were 100 mu l of samples of vortexed material incubated in blood agar and 24 h later, colony numbers were assessed. In the second part of study, the grafts were implanted below the musculoaponeurotic layer at inguinal. region of rats following the same procedure of incubation and washing. On the 8th day, the rats were examined for infection rate and their wound cultures were obtained. Results. The least amount of bacterial growth was detected in the samples obtained from gold-palladium coated grafts; whereas the highest rate of growth was found in samples of naive grafts. The superficial surgical site infection rate was 0% in gold-palladium coated, 30% in gold-coated and 100% in naive polypropylene group. The bacterial growth rate from wound cultures confirmed the superficial surgical site infection rates in all groups. Conclusion. Prosthetic graft infection with S. epidermidis can be prevented by coating the graft with gold-palladium or gold. (c) 2006 Elsevier Inc. All rights reserved

Case report: Intramesocolic malposition of the gallbladder

[No abstract available

Investigation (in vivo and in vitro) of booster dose requiremet for long-term protection against hepatitis B virus infection

KISA, Ucler/0000-0002-8131-6810WOS: 000175704700804

Investigation of OH-proline contents of hernia sacs in children and comparison with adults

WOS: 000231963500005PubMed: 16163591Purpose: One of the factors suggested to be causative in hernia formation is defective collagen metabolism. In this study, we investigated whether there is any relationship between the collagen contents of indirect hernial sacs and certain demographic and anatomic parameters. Methods: Hernial sac hydroxyproline levels were measured in 100 pediatric and 23 adult indirect inguinal hernia cases as indicators of collagen concentrations. Hydroxyproline levels were compared between boys and girls, right and left sided hernias, unilateral and bilateral cases, children and adults. Whether there was any relationship between patient age and hydroxyproline level was also investigated. Results: No difference was found between males and females (p > 0.05), right and left sided hernias (p > 0.05) or unilateral and bilateral cases (p > 0.05). Hydroxyproline levels of adults were found to be significantly higher than those of children (p = 0.000). There was also a positive correlation between age and hydroxyproline levels of boys (r = 0.285, p = 0.023). Conclusion: Although a relationship between direct inguinal hernia and collagen structure has been shown by some investigators, we were unable to point to any significant findings which would indicate such a relationship in indirect inguinal hernia cases. Further studies on hydroxyproline levels in peritoneal samples will be necessary to understand the role of peritoneal hydroxyproline levels in hernia formation

The Effects of Thymoquinone (Kalonji) on Abdominal Adhesion in Experimental Abdominal Adhesive Model

The aim of this study was to investigate the effects of thymoquinone on abdominal adhesion development in an experimental abdominal adhesion model. Forty-five female Wistar albino rats weighing 260–280 g were used in the study. The rats were randomized into 3 even groups. Control, serum physiological (SP), and thymoquinone (TQ) groups were formed. In the experimental abdominal adhesion model, caecum serosa was brushed until the petechial hemorrhages were seen. No additional procedures were performed in the control group except surgery protocol. SP was injected over the caecum in the SP group. In the thymoquinone group, the abdomen was closed after the application of prepared thymoquinone solution on the caecum surface. On the 21st day, tissue samples from sacrificed rats were examined macroscopically and microscopically, and statistically evaluated. There was a statistically significant difference between the control group and the thymoquinone group in the microscopic evaluation (p = 0.006). However, there was no statistically significant difference between SP group and control group, and between thymoquinone group and SP group. Macroscopic evaluation revealed a statistically significant difference between the thymoquinone group and the control group, and between the thymoquinone group and the SP group (p = 0.009, p = 0.027, respectively). In the microscopic and macroscopic evaluation, it was observed that thymoquinone had a decreasing effect on postoperative adhesions. We think that this effect of thymoquinone is due to its anti-inflammatory and antioxidant properties. However, the available data are not sufficient for this effect to be used in medical treatment. Further studies are needed in the future. © 2019, Association of Surgeons of India

Reinforcement of the suture line with an ePTFE graft attached with histoacryl glue in duodenal trauma

PubMed: 16630421Background: Most duodenal injuries are managed with primary repair, but the degree of duodenal-wall injury may threaten the integrity of the primary repair. Therefore, we evaluated whether the primary repair site could be reinforced with histoacryl glue (HAG) or HAG with an expanded polytetrafluoroethylene (ePTFE) mesh. Methods: Grade 3 duodenal injury in the second portion of the rat duodenum was chosen as a standard trauma model. Thirty-three male rats were divided into sham (n = 3), 2-layer primary repair (n = 10), 1-layer primary repair plus HAG application (n = 10) and ePTFE attached with HAG over the 1-layer primary repair site (n = 10) groups. Ten-day survival, adhesion grades and histological assessment were taken as outcome measures. Results: A significant survival advantage was identified in the group that had an ePTFE graft attached with HAG over a 1-layer repair when compared with the group that had a 2-layer primary repair. Adhesion grades were found to be particularly increased in the group that had an ePTFE graft attached with HAG over the primary repair site, moderately increased in the primary repair plus HAG application group and lower in the 2-layer primary repair group. ePTFE graft application was found to be beneficial to coverage of the HAG-dependent empty spaces in the serosal layer. Conclusions: A primary repair site after duodenal trauma or a difficult duodenal stump can be reinforced with the application of HAG or ePTFE graft implantation with HAG. © 2006 CMA Media Inc