Cultures Of Candida Albicans Research Articles

Encapsulation of curcumin in polymeric nanoparticles for antimicrobial Photodynamic Therapy.

Curcumin (CUR) has been used as photosensitizer in antimicrobial Photodynamic Therapy (aPDT). However its poor water solubility, instability, and scarce bioavalibility hinder its in vivo application. The aim of this study was to synthesize curcumin in polymeric nanoparticles (NP) and to evaluate their antimicrobial photodynamic effect and cytoxicity. CUR in anionic and cationic NP was synthesized using polylactic acid and dextran sulfate by the nanoprecipitation method. For cationic NP, cetyltrimethylammonium bromide was added. CUR-NP were characterized by physicochemical properties, photodegradation, encapsulation efficiency and release of curcumin from nanoparticles. CUR-NP was compared with free CUR in 10% dimethyl sulfoxide (DMSO) as a photosensitizer for aPDT against planktonic and biofilms (mono-, dual- and triple-species) cultures of Streptococcus mutans, Candida albicans and Methicillin-Resistant Staphylococcus aureus. The cytotoxicity effect of formulations was evaluated on keratinocytes. Data were analysed by parametric (ANOVA) and non-parametric (Kruskal-Wallis) tests (α = 0.05). CUR-NP showed alteration in the physicochemical properties along time, photodegradation similar to free curcumin, encapsulation efficiency up to 67%, and 96% of release after 48h. After aPDT planktonic cultures showed reductions from 0.78 log10 to complete eradication, while biofilms showed no antimicrobial effect or reductions up to 4.44 log10. Anionic CUR-NP showed reduced photoinactivation of biofilms. Cationic CUR-NP showed microbicidal effect even in absence of light. Anionic formulations showed no cytotoxic effect compared with free CUR and cationic CUR-NP and NP. The synthesized formulations improved the water solubility of CUR, showed higher antimicrobial photodynamic effect for planktonic cultures than for biofilms, and the encapsulation of CUR in anionic NP reduced the cytotoxicity of 10% DMSO used for free CUR.

Regulatory Profile Changes of Lymphocytes and Peripheral Blood Monocytes in Children with Candidiasis Associated with Chronic Somatic Diseases

In this paper, we report results of the study of immune parameters with the assessment of regulatory and effector subpopulations of lymphocytes and monocytes with candidiasis in children with chronic somatic diseases (secondary pyelonephritis and obstructive diseases of the upper gastrointestinal tract). Candidiasis was diagnosed by the rising level of circulating Candida albicans mannan antigen and culture mycological research. It was found that the persistence of fungi is associated with differentiated regulatory changes in the structure of subpopulations of lymphocytes and monocytes with preferential increase of immunosuppressive cells (CD4+CD25+hi, CD3+CD16/56+, CD3−CD8+, CD3+4−8−) amid reduction of effector subpopulations of lymphocytes and antigen presenting cells associated with Th1 immune response profile.

Microemulsion Based Bioadhesive Gel of Itraconazole Using Tamarind Gum: In-vitro and Ex-vivo Evaluation

The current study was aimed to formulate and evaluate bioadhesive gel containing microemulsion (ME) of itraconazole (ITZ) and an attempt was made to investigate suitability of tamarind gum (TG) as a gelling agent. The solubility of ITZ in oils, surfactants and co-surfactant was evaluated for the selection of appropriate component. The ratio of surfactant and co-surfactant was optimized by constructing pseudoternary phase diagram. Ternary phase diagram was constructed using isopropyl myristate (IPM) and oleic acid (OA) as oil phase, tween 80 as surfactant and isopropyl alcohol (IPA) as cosurfactant in order to obtain ME region. The optimized ME of ITZ was characterized by its qualitative and quantitative tests and incorporated into polymeric gels of carbopol (CBP), xanthan gum (XG) and TG. The ME based ITZ gels were evaluated for pH, drug content, viscosity, ex-vivo bioadhesion, spreadability and in vitro drug release. Furthermore, antifungal activity of the gels was performed by agar cup diffusion technique using cultures of Candida albicans. ITZ showed maximum solubility in mixture of IPM and OA (1:1). Stable ME was obtained when IPM and OA was taken in the ratio of 1:1 as oil phase, Tween 80 as surfactant and isopropyl alcohol (IPA) as cosurfactant at the weight ratio of 10:45:45. The optimized ME based gels showed pH in the range of 6.11 to 6.48, spreadability in the range of 4.1 to 7.1gm.cm/sec and ex vivo bioadhesion in the range of 65 to 84gm. The viscosity study indicated pseudoplastic behaviour of all ME based gel formulations. Amongst the studied ME gels, TG containing gels exhibited fast and complete drug release at the end of 24h. Formulation F7 containing TG showed wide zone of inhibition and found to be stable for three months. These results indicate that the TG containing ME gel may be a used as vehicle for topical delivery of drugs.

IDENTIFIKASI SENYAWA METABOLIT SEKUNDER DAN UJI AKTIVITAS EKSTRAK ETANOL HERBA MENIRAN (Phyllanthus niruri L.) TERHADAP CANDIDA ALBICANS MENGGUNAKAN METODE DIFUSI CAKRAM

The aim of this research is to know the ability of meniran ethanol extract (Phyllanthus niruri L.) in inhibiting the growth of Candida albicans. The research design is an experimental study. The extract used was herbal meniran extract made by maceration using 70% ethanol solvent, the content of ethanol extract of meniran tested against Candida albicans using disc diffusion method were 5%, 10%, 20%, 30% and 40%. Activity test conducted on Sabaraound Dextrose agar media that has been smeared with Candida albicans culture which has been standardized with Mc Farland standard. The pre-tested disc paper is first dipped into the extract with various concentrations. Incubated at 30 ° C for 24 hours and the inhibit zone formed was measured. The result showed that herbal ethanol extract of meniran resulted in drag zone diameter at Candida albicans ie 8,5 mm; 10.3 mm; 12.6 mm; 14.1 mm and 14.3 mm, for negative control 0 mm and positive control 20.1 mm. Data obtained from the results of the study were analyzed using one way anova method showed p - value <0,05, it was concluded that there was significant difference between negative control, 5%, 10%, 20%, 30%, 40% and positive control.

Relative susceptibility of airway organisms to antimicrobial effects of nitric oxide.

Nitric oxide (NO) is released in the airway as a critical component of innate immune defense against invading pathogenic organisms. It is well documented that bacteriostatic and bactericidal effects of NO are concentration-dependent. However, few data exist comparing relative susceptibility of common pathogens to NO at physiologic concentrations. In this study we evaluated the effects of NO on 4 common airway bacteria and 1 fungus, and examined the potential implications of discrepancies in sensitivity. Staphylococcus epidermis, Staphylococcus aureus, Klebsiella pneumoniae, Pseudomonas aeruginosa, and Candida albicans cultures were adjusted to a uniform optical density (OD) and grown in log phase at 37°C with varying concentrations of NO formed by DETA NONOate. Both OD readings and colony forming units (CFUs) were measured at varying time-points to evaluate for inhibitory effects of NO. P aeruginosa and C albicans were significantly more sensitive to NO at physiologic concentrations typical of the human airway. S aureus was attenuated by NO to a lesser degree, and K pneumoniae and S epidermis were more resistant to NO at all concentrations tested. Air surface liquid from cultured human sinonasal epithelial cells had an additive effect in bacterial killing of P aeruginosa, but not in S aureus. Common airway pathogens have varying levels of susceptibility to NO at physiologic concentrations of innate immune defense. Relative sensitivity of P aeruginosa and relative resistance of S epidermis may help explain the composition of the healthy microbiome, as well as opportunistic infection in the absence of induced NO release.

Sapodilla (Manilkara zapota) Broth as an Alternative Media for Candida albicans

Objective: To determine whether sapodilla can be used to grow Candida albicans . Among all the high galactose and arabinose content fruits, the sapodilla was chosen because it is available year round and can get easily in market. Other than that, it also contains vitamins, calcium and phosphorus which are very useful for fungi growth. Methods: This study used an experimental study as a method of research. The researcher culture Candida albicans on the experimental sapodilla media and identifies the morphology of the fungi by using Gram staining method. The experiment will be replicated two times to get accurate result. The procedure of this experiment constitute of sapodilla media preparation, sapodilla media observation, organism preparation, planting and incubation, observation of fungal colonies and identification of the fungi. Results: In 0%, there was no fungal growth at all. In 5%, there was mild density of fungal colonies. In 10%, there was moderate density of fungal colonies and in 15% the fungal grew with very dense colonies. Conclusions: Sapodilla ( Manilkara zapota ) broth can be used as an alternative media for Candida albicans . Keywords: Alternative media, Candida albicans, Sapodilla broth DOI: 10.15850/ijihs.v5n1.965

The epidemiological microbiological characteristics of cultures of Candida albicans circulating in hospital for HIV-infected patients.

The study was organized relating to 70 cultures of Candida albicans isolates from 19 patients (n=45) and from objects of hospital environment (n=25) in July 2013 and October2014 in specialized department for HIV-infected patients. The genetypical characteristic was given related to candida on the basis of polymerase chain reaction of intronic area of gene 25s pRNA and also their biological characteristics taking into account genotype. The rate of prevalence of Candida genotypes A, B, С and В made up to 58.6%, 10%, 18.6% and 12,8% correspondingly. It was established significant predominance of C.albicans genotype A in various commensal (pharynx) and transitory (skin) loci. In most cases, they were a cause of candidiasis, including invasive candidiasis. Besides, epresentatives of this group more frequently (85%) contaminated objects of hospital environment (p=0.0013). The cultures of C.albicans genotype В (Candida dubliniensis) were small in numbers and were isolated only from ecological biotypes of patients without clinic of candidiasis, were not detected in environment, were least active with exo-enzymes (phospholipase and protease) and were sensitive to tested anti-mycotic. In various biotops of single patients as a rule the only one strain persisted. In a number of cases genotypically different cultures were isolated. The residence of patient in hospital enhanced joining of C.albicans of other genotypes and in two cases were established a total change of cultures. Thus, in hospital environment of specialized hospitals can develop and long-time circulate hospital strains of C.albicans with high enzyme activity. The source are HIV-infected patients themselves that increases risk of of development of candidiasis.

Virus-like particles in Candida albicans culture from patients with vaginal candidosis

The viruses of pathogenic fungi and yeasts is an interesting subject for study, in this field of activity being scarce literature resources, and especially for the viruses parasiting the species of Candida. The present communication is based on our finding in laboratory during our hospital investigations on Candida infections. Practically we detected in electron microscope some virus-like particles which will be further subject of investigation.

MODIFIKASI PRINSIP PEMERIKSAAN β-D-GLUCAN UNTUK MENDETEKSI CANDIDA ALBICANS DALAM SERUM

Candida albicans β-D-glucans examination has been used for invasive fungal detection in human blood and was approved by the Food and Drug Administration. However, the method is rarely used in Indonesia and also because the cost is hardly affordable. A modification of the method using enzymatic reaction is hoped will provide a simple and affordable measurement in human blood serum. β-D-glucans as heterogeneous molecules constitute the major carbohydrates fractions of cell wall and readily detected in supernatants of Candida albicans cultures are hydrolyzed by β glucanase to form D-glucose. This additional glucose is measured using Megazyme GOPOD-Format Procedure® at 510 nm. Candida albicans were identified and cultured was derived from a patient of Dr. Moewardi General Hospital, Surakarta in July, 2012. The results show that β-D-glucans from Candida albicans is measureable to the amount of μg/100 μL serum using this modification principle

Frequency of Candidiasis and Colonization of Candida albicans in Relation to Oral Contraceptive Pills.

BackgroundCandidiasis, the infection caused by Candida albicans, is one of the most common infections of the oral cavity in humans. Candidiasis causes irritation and is known for its carcinogenic effects. Thus, it is important to recognize the predisposing factors for this opportunistic infection. Several previous studies have demonstrated an increased frequency of vaginal candidiasis in relation to oral contraceptive consumption.ObjectivesOnly a few studies on the relation between oral contraceptives and oral candidiasis have been previously conducted. This study aims to evaluate the possible relation between oral contraceptive pills and oral candidiasis.MethodsThis analytic, case-control study included 40 non-pregnant women divided into two groups: 20 who used oral contraceptive pills and 20 who did not. The groups were matched according to age, oral health, and past and present medical history. Samples were collected from the tongue’s dorsum using a cotton swab and inoculated on CHROMagar culture plates. The frequency of positive cultures and the number of Candida colonies were compared between the two groups using independent t-tests and Mann-Whitney statistical tests with SPSS18 software.ResultsThe frequency of positive cultures of Candida albicans was higher (P value = 0.03) for the case group. Also, the number of C. albicans and C. krusei was significantly higher for the case group compared to the control group (P value = 0.04, P value = 0.03).ConclusionsThe results of the present study demonstrate that oral contraceptives containing estradiol can lead to Candida colonization in the oral cavity. It is recommended that further studies comparing the influence of oral contraceptives on Candida’s adherence to the epithelium is highly recommended.

Sonochemical fabrication of edible fragrant antimicrobial nano coating on textiles and polypropylene cups

We report on a simple and effective ultrasound-assisted deposition of vanillin nanoparticles (∼50nm in size), raspberry ketone (RK) nanoparticles (∼40nm in size) and camphor nanoparticles (width ∼30nm, length ∼40nm in size) on textiles and on polypropylene surfaces. The excellent antibacterial and antifungal activity of the fragrant coatings on cotton bandages, and polypropylene surface against Escherichia coli (E. coli), Salmonella paratyphi A (S. paratyphi A) and the yeast Candida albicans (C. albicans) cultures was demonstrated. It is worth pointing out that these fragrant materials are edible, making them very useful for packaging. The mechanism of the edible fragrant coating formation and adhesion to the textile was discussed, and finally an up-scaling of the sonochemical process for textile coating was carried out.

The production and analysis of carotenoid preparations from some strains of xylotrophic Basidiomycetes

The aim of the study was selection of optimal conditions for obtaining carotenoid drugs of mycelium origin from the basidiomycete strains Laetiporus sulphureus Ls-08, Fomes fomentarius Ff-1201 and Fistulina hepatica Fh-18 and the study of antibacterial and total antioxidant activity of these compounds. The strains were surface grown on a glucose-peptone medium modified for each producer. The homogenized pigments of the mycelium strains were extracted with ethanol and the solvent was separated under vacuum at 60 ºC. The absorption spectra of the carotenoid drugs were recorded for alcoholic solutions at 350–500 nm. The antibacterial activity of the carotenoids was determined by the agar diffusion method, and the total antioxidant activity was determined by the DPPH-method. It was found that the optimum temperature for carotenoid extraction is 60 °C. The absorption spectra of carotenoid drugs showed three peaks in 420, 450 and 470 nm. These results respond to the β-carotene absorption spectra. The highest antioxidant activity was noted for carotenoid drugs from F. hepatica Fh-18 and L. sulphureus Ls-08 strains obtained at an extraction temperature of 40 and 60 °C respectively. The antibacterial activity of carotenoid drugs against the test cultures was not species dependent. Carotenoid drugs with a 20% concentrate obtained from the L. sulphureus Ls-08 strain had the highest antibacterial activity against the test cultures Staphylococcus aureus and Escherichia coli. Carotenoids from the mycelium of F. hepatica Fh-18 had the highest antibacterial activity against the test culture Candida albicans. Extraction temperature of 60 °C is optimal for mycelial yield of carotenoids from the studied strains. All preparations of carotenoids exhibited antibacterial activity against the test microorganism cultures. The carotenoid drugs obtained at 40 and 60 °C from the strains F. hepatica Fh-18 and L. sulphureus Ls-08 respectively showed the highest antioxidant activity.

Hyperbranched polyester poly(3-diethylaminepropionate)s and their copper(II) complexes: Synthesis, characterization and biological investigation

New polydentate ligands based on hyperbranched second and third generation polyesters containing terminal (3-diethylamino)propionate fragments and their polynuclear copper(II) complexes were synthesized and characterized by spectroscopic methods. The acid-base properties spectroscopy determined that the functionalization degree of the diethylamine-modified hyperbranched polyesters (LI, LII) increases from the second (56%) to third (81%) generation. The polynuclear complexes Cu(II)–LI and Cu(II)–LII were observed. A coordination site of the complexes contains paramagnetic fragment CuN2O2Solv2 where Solv is H2O or DMSO. The hyperbranched poly(ester amine) of the third generation have strong antifungal activity against Aspergillus fumigatus culture, and its metal complex is active against Candida albicans culture.

Effect of 5-aminolevulinic acid photodynamic therapy on Candida albicans biofilms: An in vitro study

BackgroundIn this study, the photoinactivation of 5-aminolevulinic acid (ALA) has been investigated on Candida albicans biofilms in vitro. MethodsAfter culture and proliferation of Candida albicans biofilms in vitro, the metabolic activity was confirmed using XTT reduction assay. Then, the suitable incubation time and concentration of ALA were determined by measuring PpIX accumulation quantities. Photosensitivity of the biofilms treated with ALA solution was studied in optical doses of 50, 100, 200 and 300J/cm2 while light irradiation was applied by a red light semiconductor. Finally, rapid immunofluorescence staining method using the LIVE/DEAD FungaLight Yeast Viability Kit and XTT assay were conducted to visualize and quantify the antifungal effect of ALA-PDT on Candida albicans biofilms. ResultsA 5h incubation time and 15mM ALA concentration were determined for this study. Photoinactivation of ALA-PDT on Candida albicans biofilms showed a significant increase of protoporphyrin IX (PpIX) in the biofilms. The metabolic activity of Candida albicans biofilms tread with ALA-PDT confirmed the inhibition efficacy compared with control groups. Upon radiation at 300J/cm2, cells in Candida albicans biofilms were 74.45% inhibited. ConclusionsPpIX can be absorbed in biofilm-grown Candida albicans in vitro and under appropriate parameters, photochemistry can be triggered by light in combination with ALA and inhibits Candida albicans biofilms effectively.

What is the most effective treatment for a patient with symptoms of chronic mucocutaneous candidiasis (CMC)?

Evidence-Based Answer For patients with CMC, 6-month therapy with a systemic azole may be effective (SOR: B, single RCT). Daily oral fluconazole has been recommended as first-line treatment (SOR: C, expert opinion). Should resistance develop, treatment should be individualized based on Candida albicans culture susceptibility and clinical response; options include posaconazole, echinocandins, and amphotericin B, with the need for maintenance antifungal therapy likely (SOR: C, case reports and expert opinion).

Inkjet deposition of itraconazole onto poly(glycolic acid) microneedle arrays.

Poly(glycolic acid) microneedle arrays were fabricated using a drawing lithography process; these arrays were modified with a drug release agent and an antifungal agent by piezoelectric inkjet printing. Coatings containing poly(methyl vinyl ether-co-maleic anhydride), a water-soluble drug release layer, and itraconazole (an antifungal agent), were applied to the microneedles by piezoelectric inkjet printing. Microscopic evaluation of the microneedles indicated that the modified microneedles contained the piezoelectric inkjet printing-deposited agents and that the surface coatings were released in porcine skin. Energy dispersive x-ray spectrometry aided in confirmation that the piezoelectric inkjet printing-deposited agents were successfully applied to the desired target areas of the microneedle surface. Fourier transform infrared spectroscopy was used to confirm the presence of the component materials in the piezoelectric inkjet printing-deposited material. Itraconazole-modified microneedle arrays incubated with agar plates containing Candida albicans cultures showed zones of growth inhibition.

Protocol for Determination of the Persister Subpopulation in Candida Albicans Biofilms.

In contrast to planktonic cultures of the human fungal pathogen Candida albicans, C. albicans biofilms can contain a persister subpopulation that is tolerant to high concentrations of currently used antifungals. In this chapter, the method to determine the persister fraction in a C. albicans biofilm treated with an antifungal compound is described. To this end, a mature biofilm is developed and subsequently treated with a concentration series of the antifungal compound of interest. Upon incubation, the fraction of surviving biofilm cells is determined by plating and plotted versus the used concentrations of the antifungal compound. If a persister subpopulation in the biofilm is present, the dose-dependent killing of the biofilm cells results in a biphasic killing pattern.

Effect of essential oils prepared from Thai culinary herbs on sessile Candida albicans cultures.

Although medicinal herbs with fungicidal effects have been ubiquitously employed in traditional medicine, such effects of culinary herbs and spices still have to be elucidated. Therefore, it is noteworthy to determine the antifungal efficacy of some edible herbs used in Thai cuisine against sessile Candida albicans cultures, and to inquire if they can be further utilized as naturally-derived antifungals. Fourteen essential oils extracted from Thai culinary herbs and spices were tested for their antifungal activity against C. albicans using the agar disk diffusion method followed by broth micro-dilution method for the determination of minimum inhibitory concentration (MIC) and minimum fungicidal concentration. The oils with potent antifungal effects against planktonic fungi were then assessed for their effect against sessile fungus (adherent organisms and established biofilm culture). MIC of the oils against sessile C. albicans was evaluated by 2,3-bis-(2-methoxy-4-nitro-5-sulfophenyl)-2H-tetrazolium-5-carboxanilide reduction assay. All selected culinary herbs and spices, except galangal, garlic, and turmeric, exhibited inhibitory effects on planktonic yeast cells. Cinnamon bark and sweet basil leaf essential oils exhibited potent fungicidal effect on planktonic and sessile fungus. Sessile MICs were 8-16 times higher than planktonic MICs. Consequently, both cinnamon bark and sweet basil leaf herbal oils seem to be highly effective anti-Candida choices. (J Oral Sci 58, 365-371, 2016).

The in vivo effect of Methyl Chavicol, on the Candida albicans Germ Tube Induction

Yeast (Candida albicans) is the term for the fungus that exists as a single celled organism rather than as hyphae. In the present study Methyl chavicol a major constituent of Holy Basil (Ocimum sanctum) essential oil has been evaluated against the induction of germ tubes in Candida albicans. Ocimum Sanctum leaves and seeds were used for extraction of basil oil through stream distillation process. Candida cells were also grown in yeast extract, peptone and dextrose (1:2:2) medium. Primary culture (0.5%) of Candida albicans was mixed with 25ml of Lee’s modified media which was grown for 72 h at 25oC and was centrifuged at 5000 rpm for 5 min. The cells obtained in the form of pellet were washed with distilled water and then reinoculated into fresh 50ml LMM and the test compound was added. pH of the solution was adjusted to 6.5 at 37oC by adding 0.1 N NaOH solution. Then slides were prepared after every 90 min interval for 24 h and observed under inverted microscope. After 90 min in all the three sets, germ tube induction begins but the length of the germ tube greatly differs. In the control the maximum length observed is 38.3 μm but in MC1 and MC2 it is 9.4μm and 5.7μm, respectively. This clearly shows the inhibitory effects of methyl chavicol on germ tube induction. Similar results of decreasing length of germ tubes in MC2 at different time periods, proved that MC2 i.e. 70μg/mL methyl chavicol is a potent inhibitor of germ tubes induction.

Effect of tyrosol on adhesion of Candida albicans and Candida glabrata to acrylic surfaces.

The prevention of adhesion of Candida cells to acrylic surfaces can be regarded as an alternative to prevent denture stomatitis. The use of quorum sensing molecules, such as tyrosol, could potentially interfere with the adhesion process. Therefore, the aim of this study was to assess the effect of tyrosol on adhesion of single and mixed cultures of Candida albicans and Candida glabrata to acrylic resin surfaces. Tyrosol was diluted in each yeast inoculum (10(7) cells/ml in artificial saliva) at 25, 50, 100, and 200 mM. Then, each dilution was added to wells of 24-well plates containing the acrylic specimens, and the plates were incubated at 37°C for 2 h. After, the effect of tyrosol was determined by total biomass quantification, metabolic activity of the cells and colony-forming unit counting. Chlorhexidine gluconate (CHG) was used as a positive control. Data were analyzed using analysis of variance (ANOVA) and the Holm-Sidak post hoc test (α = 0.05). The results of total biomass quantification and metabolic activity revealed that the tyrosol promoted significant reductions (ranging from 22.32 to 86.16%) on single C. albicans and mixed cultures. Moreover, tyrosol at 200 mM and CHG significantly reduced (p < 0.05) the number of adhered cells to the acrylic surface for single and mixed cultures of both species, with reductions ranging from 1.74 to 3.64-log10. In conclusion, tyrosol has an inhibitory effect on Candida adhesion to acrylic resin, and further investigations are warranted to clarify its potential against Candida infections.