Antiseptic Research Articles

Dairy farm waste: a potential reservoir of diverse antibiotic resistance and virulence genes in aminoglycoside- and beta-lactam-resistant Escherichia coli in Gansu Province, China

Aminoglycosides (AGs) and beta-lactams are the most commonly used antimicrobials in animal settings, particularly on dairy farms. Dairy farm waste is an important reservoir of antibiotic resistance genes (ARGs) and virulence genes (VGs) in environmental Escherichia coli, which is an important indicator of environmental contamination and foodborne pathogen that potentially threaten human and animal health. In the present study, we aimed to characterize the ARGs and VGs in AG- and beta-lactam-resistant E. coli from dairy farm waste in Gansu Province, China. The dairy farm waste consisted of fecal (n=265) and sewage (n=54) samples processed using standard microbiological techniques and the Clinical & Laboratory Standards Institute guidelines. The total DNA of AG- and beta-lactam-resistant E. coli was extracted, and whole-genome sequencing (WGS) was performed using the Illumina NovaSeq platform and analyzed using various bioinformatics tools. In this study, among 84.3% (269/319) of the E. coli strains, 23.8% (64/269) were identified as AG- and beta-lactam-resistant E. coli. WGS analysis revealed a large pool of ARGs belonging to multiple classes such as AGs, beta-lactams, aminocoumarins, fluoroquinolones, macrolides, phenicol, tetracyclines, phosphonic acid, disinfecting and antiseptic agents, elfamycin, rifamycin, and multidrug resistance genes. Furthermore, virulome analysis of 64 E. coli strains revealed clinically important virulence factors associated with adherence, biofilm, invasion, auto-transportation, siderophores, secretion systems, toxins, anti-phagocytosis, quorum sensing, regulation, metabolism, and motility. We identified dairy farm feces and sewage waste as important reservoirs of antimicrobial resistance and virulence determinants in E. coli in Gansu, China, which can threaten human and animal health through ecological exposure and ingestion of contaminated food and water. We recommend continuous large-scale surveillance in dairy farm settings to formulate protective guidelines for public health safety.

Pre-procedural Topical Antisepsis in the Neonate: A Systematic Review Evaluating Risk Factors for Skin Injury.

Pre-procedural antisepsis is a critical component of hospital-acquired infection prevention in the neonatal intensive care unit (NICU). However, broadly utilized topical antiseptic agents pose an elevated risk of disruption to neonatal skin integrity, and evidence-based guidelines are lacking. This systematic review of the literature sought to assess and characterize the predisposing risk factors for and types of neonatal skin injury from topical antiseptic agents. A systematic search of Medline Ovid, Embase, Web of Science, CINAHL, and Cochrane Library was conducted, including academic literature providing data on neonatal skin injuries related to topical antisepsis in the NICU. A total of 19 articles (99 patients) met the inclusion criteria. Of the available data, most reported skin injuries were described in extremely preterm (98.1%) and very low birth weight (98.4%) infants. The majority of reported adverse cutaneous events were attributed to chlorhexidine preparations (74.8%), followed by octenidine (18.2%), povidone-iodine (6.1%), and isopropyl alcohol (2.0%). Erythema (40.1%), skin breakdown (23.4%), and chemical burns (17.5%) were the skin reactions reported most frequently, followed by skin irritation (8.3%), and skin necrosis (2.8%). Our findings indicate that both extremely preterm and very low birth weight infants are particularly susceptible to skin toxicities from pre-procedural antiseptic preparations. These data underscore the need for future research to support the development of guidelines which minimize iatrogenic cutaneous injuries in the neonatal population, specifically for the care of infants under 2 months of age, for whom current recommendations are lacking due to a paucity of data.

Intraoperative wound irrigation to prevent surgical site infection: A systematic review and meta-analysis.

The potential benefit of intraoperative wound irrigation (IOWI) in preventing surgical site infection (SSI) remains unclear. The use of antimicrobial agents (AMA) or antiseptic agents (ASA) is controversial worldwide. We performed a systematic review and meta-analysis of randomized clinical trials comparing AMA or ASA with saline solution in patients who underwent abdominal surgery. Sub-analyses were performed on the type of surgery, type of intervention agent, and wound classification. Nineteen studies comprising 4915 patients undergoing abdominal surgery were included. SSI was observed in 207 out of 2504 patients in the intervention group (8.26 %) and 344 out of 2411 patients in the control group (14.27%). Overall, intraoperative wound irrigation (IOWI) with AMA or ASA was associated with a lower SSI (Odds ratio (OR) 0.62; 95% CI 0.47, 0.82; p<0.01; I2=50%). Sub-analyses have shown a tendency for decreased SSI in patients from emergency surgery (OR 0.46; 95% CI 0.30, 0.70; p<0.01; I2=23%), patients with contaminated wound (OR 0.48; 95% CI 0.31, 0.74; p<0.01; I2=24%), and either the use of AMA or ASA (OR 0.53 vs. 0.65). The overall use of AMA or ASA before skin closure was associated with decreased SSI. Lower rates of SSI were observed in the subgroup analysis. Furthermore, we must consider the critical heterogeneity of the studies.

Chemical composition and antimicrobial activity of essential oil of Inula crithmoides L. growing in Egypt

The study aimed to determine the chemical composition and antimicrobial properties of the essential oil of Inula crithmoides L. growing in Egypt. The essential oil was obtained from the flowers of Inula crithmoides L. with a yield of 0.18% v/w through hydro distillation. Gas chromatography-mass spectroscopy analysis was used to identify the chemical composition of the essential oil. The antimicrobial activity of the essential oil was tested against selected species of Gram-positive, Gram-negative bacteria, and Candida species using the disc diffusion method, and MICs were determined using the broth micro-dilution method. Twenty-two compounds were identified in the essential oil of Inula crithmoides, with the major components being thymol acetate (32.4%), p-cymene (15.3%), and thymol (14.3%). The essential oil exhibited significant antimicrobial activities against Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis, Escherichia coli, and Pseudomonas aeruginosa, with an MIC of 25 µg/mL for E. coli and 50 µg/mL for other sensitive bacteria. The oil exhibited significant antifungal activity against all the tested Candida species with MIC 50 µg/mL. This study is the first to explore the chemical composition and antimicrobial activity of the essential oil of Inula crithmoides growing in Egypt, demonstrating its potential as a natural antiseptic agent.

3D-printed implants loaded with acriflavine for glioblastoma treatment

Drug delivery routes play an essential role in determining the efficacy and safety of medications. This study focused on the development and optimization of 3D-printed reservoir type implants as a combinational therapy drug delivery system for Glioblastoma Multiforme (GBM) post-surgery, possessing also antibacterial properties. In this study, we used a multimodal agent, Acriflavine (ACF) as an alternative drug to treat GBM. To date, ACF is used only as an antiseptic agent, although it has been shown to possess strong anticancer activities. ACF and a low molecular weight PCL were loaded into 3D-printed reservoir-type implants for sustained drug delivery. The study demonstrated that ACF implants exhibited sustained drug release kinetics, with faster release during the initial 30 days, followed by a gradual decrease over 90 days. This controlled release profile enhances the effectiveness of ACF delivery to tumour targets while minimizing side effects associated with systemic administration. In vitro experiments confirmed the inhibitory activity of ACF against GBM cells compared to non-tumour cells. The study also highlighted the bacteriostatic effects of ACF, making the implants potentially useful for post-surgery infection management, particularly against S. aureus, a common bacterial infection associated with brain surgery. The long-term drug-release capabilities of the implants make them attractive candidates for both tumour inhibition and antibacterial treatment. The study suggests that the developed ACF delivery systems have the potential for future clinical studies. Their ability to provide increased drug efficacy without systemic toxicity makes them promising candidates for cancer therapy and post-surgery infection management.

One-pot enantioselective synthesis of chiral phenyllactic acids by combining stereocomplementary d- and l-lactate dehydrogenases with multi-enzyme expression fine-tuning

Chiral phenyllactic acid (PLA) is a new type of antiseptic agent and a valuable precursor for active ingredients in pharmaceuticals and agrochemicals. In this study, we designed a multi-enzyme cascade that combined stereocomplementary d- and l-lactate dehydrogenases with threonine aldolase, phenylserine dehydratase, and formate dehydrogenase for the one-pot conversion of achiral glycine and benzaldehyde to synthesize d-PLA and l-PLA. To overcome the imbalance of multi-enzymes in a single cell, two enzyme modules, overexpressing four enzymes, were assembled in Escherichia coli cells to construct whole-cell catalysis systems (WCCSs). Furthermore, by optimizing reaction conditions and components, recombinant E. coli (WCCS 26) was able to produce 100 mM d-PLA with >99 % ee using a fed-batch strategy, while E. coli (WCCS 60) produced 47.2 mM l-PLA with >99 % ee. This study presents a sustainable and efficient method for synthesizing chiral PLAs from food-grade achiral starting materials.

The Essential Oil of Rocket Seeds Maintains Its Antibacterial Effects After Encapsulation in Nanoliposomes

IntroductionIt has been demonstrated that the essential oil (EO) of Eruca sativa seeds could be potentially used as an antiseptic agent. However, the application of EOs is restricted because of their chemical instability and volatility. Encapsulation in liposomes is an efficient technique for the protection of the oils. MethodsThe EO of the seeds was obtained using the hydro-distillation method. Liposomal formulation of the oil was prepared using thin layer method. ResultsGC/MS analysis indicated that erucin (1-isothiocyanato-4-methylsulfanylbutane) was the main compound of the oil, accounting for 88.86%. The prepared oil-loaded liposomes had more negative zeta potential (−17.13 mV) compared with the empty liposomes (−9.26 mV), indicating the higher stability of the liposomal oil. SEM imaging confirmed that the encapsulation of the oil does not cause any distortion in the structure of the liposomes, in comparison to the oil-free liposomes. The seed oil showed antimicrobial activities at 20 μg/ml (against Staphylococcus aureus, Enterobacter aerogenes, and Escherichia coli) and 80 μg/ml (against Enterococcus faecalis, Pseudomonas aeruginosa, and Klebsiella pneumonia), while the minimum inhibitory concentration values of the liposomal EO were 160 μg/ml against E faecalis, 80 μg/ml against P aeruginosa and K pneumonia, and 20 μg/ml against S aureus, E aerogenes, and E coli. ConclusionsAntibacterial experiments revealed that the EO of Eruca sativa seeds maintained its antibacterial effect after loading into the liposomes. Moreover, encapsulation in liposomes could improve the sustainability of the oil and increased the bioavailability of its active chemical compounds.

Surfactant-Free Synthesis of Melon Seed-Like CeO2 and Ho@CeO2 Nanostructures with Enriched Oxygen Vacancies: Characterization and Their Enhanced Antibacterial Properties.

To overcome the poor antibacterial performance of cerium oxide (CeO2) nanoparticles at low concentrations, melon seed-shaped CeO2 (MS-CeO2) and holmium (Ho)-doped CeO2 (Ho@MS-CeO2) nanoparticles were synthesized using a simple precipitation method without the addition of any surfactants. The surface morphology, phase structure, crystallinity, Ce3+ and Ce4+ valence, lattice defects, and reactive oxygen species (ROS) production of both synthesized nanostructures were examined using different techniques, i.e., scanning electron microscopy (SEM), energydispersive X-ray (EDX), resolution transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FT-IR), X-ray diffractometry (XRD), X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR), Raman spectroscopy, ultraviolet (UV) spectra, fluorescence spectra, and zeta potential (ζ). The results show that under certain stirring and aging temperatures, CeO2 and Ho-doped CeO2 nanoparticles with a melon seed-like morphology can be prepared in a short period. Both nanoparticles were tested as antiseptic agents against G+ and G - bacteria (E. coli and S. aureus), and the results confirmed that the Ho@MS-CeO2 nanostructures exhibited remarkable antimicrobial activity at a low concentration (0.5 mg/L) compared with the control group, which is attributed to the reversible conversion of Ce3+ and Ce4+ in the ceria crystal lattice, enriched oxygen vacancy, ROS species production, and positive surface charge.

Efficacy and Safety of Preoperative Prophylaxis in Cataract Surgery with Combined Topical Antiseptics: A Microbiological Study.

To evaluate the antimicrobial efficacy of an ophthalmic formulation containing hexamidine diisethionate (HD) 0.05%, polyhexamethylene biguanide (PHMB) 0.0001%, and edetate disodium (EDTA) 0.01% (Keratosept®, Bruschettini, Genova, Italy) on the microbial flora of a healthy ocular surface. Patients were enrolled consecutively. Each patient applied two drops of Keratosept® in the eye scheduled for cataract surgery (study eye) three times daily in the 2 days prior to surgery and one time in the morning of surgery. The contralateral eyes were considered as control (control eye). Bilateral conjunctival swabs were collected before the first administration (T0) and the morning of surgery (T1). The swabs were processed within 3 h from sampling for the automated detection of the presence of replicating microorganisms (colony-forming units, CFU/mL) and the provision of real-time growth curves. Conjunctival swabs of 32 patients (n = 128) were examined. Six patients were excluded from the efficacy analysis because of microbial load < 50 CFU/mL at T0 in the study eye. No difference between study and control eyes was observed at T0 (p = 0.40). Compared with T0, 20 (76.9%) study eyes and 10 (38.5%) control eyes showed a ≥ 1 log reduction of the microbial load at T1, with a significant difference between groups (p = 0.005). Keratosept® showed good tolerability, and no adverse events or eye discomfort were recorded. This study showed that the low-dose combination of antiseptic agents in the Keratosept® ophthalmic solution effectively reduces the bacterial load of healthy flora on the ocular surface.

Essential Oils of Laurus nobilis L.: From Chemical Analysis to In Silico Investigation of Anti-Inflammatory Activity by Soluble Epoxide Hydrolase (sEH) Inhibition.

Laurus nobilis L. is commonly used in folk medicine in the form of infusion or decoction to treat gastrointestinal diseases and flatulence as a carminative, antiseptic, and anti-inflammatory agent. In this study, the essential oil (EO) composition of wild-grown L. nobilis L. leaves collected from seven different altitudinal locations in the Molise region and adjacent regions (Abruzzo and Campania) was investigated. EOs from the leaves were obtained by hydrodistillation and analyzed by GC-FID and GC/MS, and 78 compounds were identified. The major oil components were 1,8-cineol (43.52-31.31%), methyl-eugenol (14.96-4.07%), α-terpinyl acetate (13.00-8.51%), linalool (11.72-1.08%), sabinene (10.57-4.85%), α-pinene (7.41-3.61%), eugenol (4.12-1.97%), and terpinen-4-ol (2.33-1.25%). Chemometric techniques have been applied to compare the chemical composition. To shed light on the nutraceutical properties of the main hydrophobic secondary metabolites (≥1.0%) of laurel EOs, we assessed the in vitro antioxidant activities based on 2,2-diphenyl-1-picrylhydrazyl (DPPH•) radical scavenging activity and the reducing antioxidant power by using a ferric reducing power (FRAP) assay. Furthermore, we highlighted the anti-inflammatory effects of seven EOs able to interfere with the enzyme soluble epoxide hydrolase (sEH), a key enzyme in the arachidonic acid cascade, in concentrations ranging from 16.5 ± 4.3 to 8062.3 ± 580.9 mg/mL. Thanks to in silico studies, we investigated and rationalized the observed anti-inflammatory properties, ascribing the inhibitory activity toward the disclosed target to the most abundant volatile phytochemicals (≥1.0%) of seven EOs.

A new cytotoxic saponin from the ethyl acetate extract of Myrsine semiserrata wall

AbstractMyrsine semiserrata Wall. (Primulaceae) is an evergreen shrub found in some Asian regions including Northern Vietnam, Southern China, India, Nepal, and Myanmar. Its bark and leaves are utilized in leather tanning while the fruit serves as a commonly used antiseptic agent. Phytochemical study on the ethyl acetate extract from the aerial parts of this plant led to the isolation of a new saponin 3‐O‐α‐L‐arabinopyranosyl juglangenin A (1) and four known triterpenes, lupeol acetate (2), taraxerone (3), cucurbitacin D (4), and cucurbitacin H (5). Their structures were proven by analyzing 1D, 2D NMR, and HR‐ESI‐MS spectroscopic techniques. All isolated compounds were tested for their cytotoxicity on human cancer cell lines: HepG2, KB, MCF7, and A549. Compounds 4 and 5 exhibited potent activity against HepG2 and KB cell lines with IC50 values ranging from 1.06 to 5.99 µm. Saponin substance 1 demonstrated action against all cancer cell lines with IC50 values of 74.26, 42.83, 40.65, and 70.82 µm, respectively.

Povidone-iodine in vitro antiseptic efficacy as a function of exposure duration, concentration, preparation, and length of storage.

Although 5% povidone-iodine (PVP-I) is frequently used as an ocular antiseptic agent, there is a lack of consensus regarding the effects of PVP-I concentration, storage after opening, and compounded preparation on PVP-I antisepsis. We performed a series of in-vitro experiments to determine the impact of these factors on PVP-I's inhibition of common causes of post-procedural eye infection. Inhibition of microorganism growth was measured in-vitro as a function of active PVP-I exposure time. In control experiments, PVP-I was inactivated before microorganism exposure. Tested PVP-I solutions varied in concentration (0.6%, 5%, or 10%), length of storage after opening (0, 7, or 30days), and preparation (commercial vs.compounded from stock PI solution). Tested pathogens included S. epidermidis, S. viridans, P. aeruginosa, methicillin-resistant S. aureus, methicillin-sensitive S. aureus, and C. albicans. PVP-I solutions inhibited all bacterial growth by 3min and fungal growth by 15s. Compared to 5% PVP-I, the 0.6% PVP-I was less effective in inhibiting S. viridans growth (200 ± 0 colonies vs. 7 ± 8 at 30s, P = 0.0004; 183 ± 21 vs. 0 ± 0 at 1min, P = 0.018), but more effective in inhibiting P. aeruginosa (30 ± 20 vs. 200 ± 0 at 15s, P = 0.019). Compared to commercial and newly-opened PVP-I solutions, compounded preparations and solutions stored for 7 or 30days after bottle opening either preserved or improved antiseptic efficacy against tested microorganisms. Concentration of PVP-I solution affects antiseptic efficacy within 1min of exposure, but all solutions performed equivalently at 3min. In contrast to results of prior studies investigating dilute PVP-I, the 0.6% PVP-I did not demonstrate a uniformly equivalent or superior anti-septic effect. Compounded preparation and storage length after bottle opening did not decrease PVP-I antiseptic activity.

The influence of the pectin structure on the properties of hydrogel dressings doped with octenidine-containing antiseptic

This article presents a method for producing hydrogel dressings using high methylated pectin from apples or citrus, doped with the antiseptic agent, octenidine dihydrochloride. Octenidine was incorporated in-situ during the polymer crosslinking. The pectins were characterized by their varying molecular weight characteristics, monosaccharide composition, and degree of esterification (DE). The study assessed the feasibility of producing biologically active hydrogels with pectin and delved into how the polymer's characteristics affect the properties of the resulting dressings. The structure evaluation of hydrogel materials showed interactions between individual components of the system and their dependence on the type of used pectin. Both the antimicrobial properties and cytotoxicity of the dressings were evaluated. The results suggest that the primary determinants of the functional attributes of the hydrogels are the molecular weight characteristics and the DE of the pectin. As these values rise, there is an increase in polymer-polymer interactions, overshadowing polymer-additive interactions. This intensification strengthens the mechanical and thermal stability of the hydrogels and enhances the release of active components into the surrounding environment. Biological evaluations demonstrated the ability of octenidine to be released from the dressings and effectively inhibit the growth of microbial pathogens.

Amnion as an Innovative Antiseptic Carrier: A Comparison of the Efficacy of Allogeneic and Xenogeneic Transplantations in the Context of Burn Therapy.

Background and Objectives: The amniotic membrane is widely used in the treatment of chronic wounds, in toxic epidermal necrolysis (TEN), and in the treatment of burns. In our clinical practice, we use amniotic dressings on shallow skin wounds caused by burns. Counteracting infections is an important aspect of working with burn wounds. Therefore, the main goals of this work are to demonstrate the usefulness of amniotic membrane soaked in antiseptics for the prevention of wound infections and to compare the antibacterial efficacy of selected variants of allogeneic and xenogeneic amniotic membrane grafts soaked in specific antiseptic agents. Materials and Methods: The studied material consisted of human and pig placenta. The human and animal amnions were divided in two parts. The first part consisted of amniotic discs placed on rigid mesh discs and preparing the fresh amnion. The second part of the amnion was frozen at a temperature of -80 °C for 24 h. Then, it was radio-sterilized with a dose of 35 kGy. The amniotic discs were placed on rigid mesh to prepare the radiation-sterilized amnion. The amniotic discs were placed in a 12-well plate and immersed in 3 mL of the appropriate antiseptic solutions: Prontosan, Braunol, Borasol, Microdacyn, Octenilin, Sutrisept, and NaCl as a control. The amniotic discs were incubated in antiseptics for 3 h. The microbiological tests were conducted by placing the antiseptic-infused amniotic discs on microbiological media inoculated with hospital strains. Results: The largest average zone of growth inhibition was observed in dressings soaked with Sutrisept, Braunol, and Prontosan. The greatest inhibition of bacterial growth was achieved for radiation-sterilized porcine amnion impregnated with Braunol and Sutrisept, as well as for radiation-sterilized human amnion impregnated with Braunol. Conclusions: Human and porcine amniotic membrane is effective in carrying antiseptics. Radiation-sterilized amnion seems to inhibit the growth of microorganisms better than fresh amnion.

Supra- and Subgingival Microbiome in Gingivitis and Impact of Biofilm Control: A Comprehensive Review.

This comprehensive review aimed (1) to characterize the sub- and supragingival microbiome in patients with biofilm-induced gingivitis (including experimental gingivitis), (2) to assess its stability and evolution over time, and (3) to assess the impact of biofilm control measures on this stability. An electronic search of the MEDLINE®/PubMed® database until December 2023 was conducted. NCBI Taxonomy, eHOMD 16S rRNA Reference Sequence, and Tree Version 15.23 databases were used to standardize taxonomic nomenclature. Out of 89 papers initially retrieved, 14 studies were finally included: 11 using experimental gingivitis as a model and three randomized clinical trials evaluating the impact of biofilm control measures. Among them, five characterized the subgingival microbiome, nine the supragingival microbiome, and one both the sub- and supragingival microbiome. In addition, five studies evaluated the effect of toothpaste, and four studies evaluated the effect of mouth rinses. The diversity and structure of the microbiome differed significantly between patients with periodontal health and those with biofilm-induced gingivitis (including experimental gingivitis). Those differences were not reversed through conventional oral hygiene measures. Specific antiseptic agents, especially if delivered as mouth rinses, may have an impact on the supra- and subgingival microbiome in gingivitis.

A Review on Traditional Uses, Phytochemistry and Pharmacological Activities of Calendula officinalis Linn

Calendula officinalis Linn, known as pot marigold, is a plant that belongs to the Asteraceae family. Various online bibliographic databases namely, Google scholar, PubMed, SciFinder, and Web of Science were used for integrating information. Calendula officinalis is extensively used in Homoeopathic, Unani, and Ayurvedic system of medication as diaphoretic, analgesic, antiseptic, and anti-inflammatory agents and used to treat gynaecological issues, gastro-intestinal disorders, inflammations of oral and pharyangeal mucosa, eye problems, skin injuries and certain burns, poor eyesight, and menstrual irregularities. Several studies have shown that Calendula officinalis is a major source of diverse classes of bioactive compounds namely terpenoids, flavonoids, coumarines, quinones, and carotenoids. Various in vivo and in vitro assessment of Calendula officinalis's pharmacological activity suggest that the plant has antidiabetic, anti-inflammatory, anti-tumor, anticancer, and gastroprotective activity. This review compiles the information about pharmacological activities, traditional medicinal uses, and phytochemicals present in Calendula officinalis.

Prevention of oral cross-infection by using povidone-iodine compared with other antiseptic agents for orally transmitted diseases: A Review

Prevention of oral cross-infection by using povidone-iodine compared with other antiseptic agents for orally transmitted diseases: A Review

Analysis of major antiseptic agents using an experimental spectrophotometric device operating in the wavelength range 200–1100 nm

Analysis of major antiseptic agents using an experimental spectrophotometric device operating in the wavelength range 200–1100 nm

Efficacy of Chlorhexidine Impregnated Wipes for the Local Dysbiosis in Atopic Dogs: A Multicentric Prospective Study.

(1) Background: Dysbiosis is frequently observed in Canine Atopic Dermatitis (CAD). Antimicrobial treatment may be necessary to treat flare ups and the use of topical treatments is beneficial to prevent the development of bacterial resistance. Wipes are an easy way to apply antiseptic agents on the skin. The aim of this study was to evaluate the benefits of 3% chlorhexidine impregnated wipes (Pyoskin® wipes, MP Labo, France) on local areas of dysbiosis in dogs with CAD. (2) Methods: A total of 20 dogs suffering from CAD presented with localised areas of dysbiosis were included in this study. Affected areas were cleansed with the daily application of chlorhexidine wipes once a day for 14 days. Follow-up visits were scheduled after one and two weeks. Clinical signs (lesions and pruritus), dysbiosis scored by cytological counts (cocci and Malassezia) and investigator and owner global appreciation were evaluated. (3) Results: A statistically significant decrease in clinical scores and cytological counts were observed as soon as D7 and until D14. Both owner and investigator appreciation were considered high (4) Conclusions: The use of chlorhexidine impregnated wipes is a useful and easy way to manage localised dysbiosis in atopic dogs and allows limiting of systemic medication to prevent bacterial resistance.

Comparing the in vitro efficacy of chlorhexidine and povidone-iodine in the prevention of post-surgical endophthalmitis

BackgroundIntravitreal injections are a common ophthalmologic procedure. While infections following these injections are rare, they can lead to endophthalmitis, with potentially serious consequences. Various methods have been proposed to prevent endophthalmitis, including the use of antisepsis and antibiotics in patient preparation.PurposeTo evaluate the antiseptic efficacy of aqueous chlorhexidine (CHX) and povidone-iodine (PI) when used alone and in combination with lidocaine gel (LG) in vitro.MethodsTwo independent experimental trials were conducted. The first trial determined the minimum inhibitory concentrations (MICs) and the minimum bactericidal concentrations (MBCs) of CHX and PI against six bacterial strains. The second trial evaluated the bactericidal efficacy of the antiseptic agents (CHX 0.1% and PI 5%) and their combination with LG against the same bacterial strains.ResultsCHX was more effective than PI in reducing the number of colonies forming units (cfus) of the tested bacteria. The order in which the antiseptic and LG were administered affected their effectiveness, with CHX administered before LG resulting in greater reduction of bacterial growth.ConclusionsCHX 0.1% is more effective than PI 5% as an antiseptic agent. Application of CHX and PI prior to the use of lidocaine gel results in a more effective reduction of microorganisms.