scholarly journals Silver diamine fluoride (SDF) used in childhood caries management has potent antifungal activity against oral Candida species

2020 ◽  
Author(s):  
Kausar Sadia Fakhruddin ◽  
Lakshman Samaranayake ◽  
Hiroshi Egusa ◽  
Hien Chi Ngo ◽  
Venkatachalam Thenmozhi ◽  
...  
Keyword(s):  
Candida Species ◽  
Fungal Species ◽  
Silver Diamine Fluoride ◽  
Low Concentrations ◽  
Caries Management ◽  
Bacteria And Fungi ◽  
Oral Candida ◽  
Time Kill ◽  
First Time ◽  
Childhood Caries

Abstract Background: The microbiome of Severe-Early Childhood Caries (S-ECC), is characterized by an ecosystem comprising bacterial and fungal species, with a predominance of Candida species. Hence, an anti-cariogen effective against both bacteria and fungi would be valuable in the management of S-ECC. Methods : Here we evaluate the antifungal effect of silver diamine fluoride (SDF) against 35-clinical yeast isolates (Ten-each of C. albicans , C. krusei, C. tropicalis and five C. glabrata strains) from dentinal caries-lesions from S-ECC. Results: Disc-diffusion and time-kill assays as well as MIC 50 and MIC 90 evaluations against therapeutic concentrations confirmed the broad-spectrum anti-candidal potency of SDF. Ultrastructural images revealed morphologic aberrations of yeast-cell walls on exposure to SDF. All C. krusei and C. glabrata isolates were significantly more sensitive to SDF, relative to the standard antifungal fluconazole. Further, SDF appears to effectively abrogate filamentation of C . albicans even at very low concentrations. Conclusions: Our data, for the first time, elucidate the antifungal potency of SDF, in addition to its known antibacterial activity, in the management of S-ECC.

scholarly journals Silver diamine fluoride (SDF) used in childhood caries management has potent antifungal activity against oral Candida species

2020 ◽  
Author(s):  
Kausar Sadia Fakhruddin ◽  
Hiroshi Egusa ◽  
Hien Chi Ngo ◽  
Chamila Panduwawala ◽  
Siripen Pesee ◽  
...  
Keyword(s):  
Candida Species ◽  
Fungal Species ◽  
Silver Diamine Fluoride ◽  
Low Concentrations ◽  
Caries Management ◽  
Bacteria And Fungi ◽  
Oral Candida ◽  
Time Kill ◽  
First Time ◽  
Childhood Caries

Abstract Background: The microbiome of Severe-Early Childhood Caries (S-ECC), is characterized by an ecosystem comprising bacterial and fungal species, with a predominance of Candida species. Hence, an anti-cariogen effective against both bacteria and fungi would be valuable in the management of S-ECC. Here we evaluate the antifungal effect of silver diamine fluoride (SDF) against 35-clinical yeast isolates (Ten-each of C. albicans , C. krusei, C. tropicalis and five C. glabrata strains) from dentinal caries-lesions from S-ECC. Results: Disc-diffusion and time-kill assays as well as MIC 50 and MIC 90 evaluations against therapeutic concentrations confirmed the broad-spectrum anti-candidal potency of SDF. Ultrastructural images revealed morphologic aberrations of yeast-cell walls on exposure to SDF. All C. krusei and C. glabrata isolates were significantly more sensitive to SDF, relative to the standard antifungal fluconazole. Further, SDF appears to effectively abrogate filamentation of C. albicans even at very low concentrations. Conclusions: Our data, for the first time, elucidate the anti-candidal potency of SDF, in addition to its known antibacterial activity, in the management of S-ECC.

scholarly journals Silver diamine fluoride (SDF) used in childhood caries management has potent antifungal activity against oral Candida species

2019 ◽  
Author(s):  
Kausar Sadia Fakhruddin ◽  
Lakshman Samaranayake ◽  
Hiroshi Egusa ◽  
Hien Chi Ngo ◽  
Venkatachalam Thenmozhi ◽  
...  
Keyword(s):  
Candida Species ◽  
Fungal Species ◽  
Silver Diamine Fluoride ◽  
Caries Management ◽  
Bacteria And Fungi ◽  
Oral Candida ◽  
Time Kill ◽  
First Time ◽  
Caries Lesions ◽  
Childhood Caries

Abstract Background The microbiome of Severe-Early Childhood Caries (S-ECC), is characterized by an ecosystem comprising bacterial and fungal species, with a predominance of Candida species. Hence, an anti-cariogen effective against both bacteria and fungi would be valuable in the management of S-ECC.Methods Here we evaluate the antifungal effect of silver diamine fluoride (SDF) against 35-clinical yeast isolates (Ten-each of C. albicans , C. krusei, C. tropicalis and five C. glabrata strains) from dentinal caries-lesions from S-ECC.Results Disc-diffusion and time-kill assays as well as MIC 50 and MIC 90 evaluations against therapeutic concentrations confirmed the broad-spectrum anti-candidal potency of SDF. Ultrastructural images revealed morphologic aberrations of yeast-cell walls on exposure to SDF. All C. krusei and C. glabrata isolates were significantly more sensitive to SDF, relative to the standard antifungal fluconazole.Conclusions Our data, for the first time, elucidate the antifungal potency of SDF, in addition to its known antibacterial activity, in the management of S-ECC.

scholarly journals Silver diamine fluoride (SDF) used in childhood caries management has potent antifungal activity against oral Candida species

2020 ◽  
Vol 20 (1) ◽  
Author(s):  
Kausar Sadia Fakhruddin ◽  
Hiroshi Egusa ◽  
Hien Chi Ngo ◽  
Chamila Panduwawala ◽  
Siripen Pesee ◽  
...  
Keyword(s):  
Antifungal Activity ◽  
Candida Species ◽  
Silver Diamine Fluoride ◽  
Caries Management ◽  
Oral Candida ◽  
Childhood Caries

Parents’ Views on Silver Diamine Fluoride to Manage Early Childhood Caries

2020 ◽  
pp. 238008442093069
Author(s):  
G. Kyoon-Achan ◽  
R.J. Schroth ◽  
H. Martin ◽  
M. Bertone ◽  
B.A. Mittermuller ◽  
...  
Keyword(s):  
Early Childhood ◽  
Informed Consent ◽  
Qualitative Study ◽  
Early Childhood Caries ◽  
Study Data ◽  
Silver Diamine Fluoride ◽  
Anterior Teeth ◽  
Caries Management ◽  
Caries Lesions ◽  
Childhood Caries

Background: The use of silver diamine fluoride (SDF) as a nonsurgical caries management product is growing. Evidence suggests that SDF is very successful in arresting caries. However, a common concern with SDF treatment is the unaesthetic black staining. The purpose of this qualitative study was to determine parents’ views following their children’s treatment with SDF to manage severe early childhood caries (ECC). Method: Parents were interviewed as part of a mixed-method study of SDF to arrest severe ECC. Children with caries lesions in primary teeth were treated with 2 applications of 38% SDF, followed by fluoride varnish. Semistructured in-person and phone interviews were conducted with 19 parents of children in the study. Data were transcribed verbatim and manually coded and uploaded to NVivo 12 for further coding analysis. Results: None of the parents had previously heard about SDF, and they learned about it from the study dentist. Although parents trusted the dentist’s information on SDF, they welcomed additional evidence, especially relating to product safety and effectiveness. Some parents were minimally concerned with the black staining caused by SDF treatment. It was more important that SDF arrested caries progression, minimized pain and sensitivity, and prevented dental infection. However, some parents expressed concerns related to the unaesthetic black staining. Interestingly, many parents indicated that their children were not overly concerned with the black staining. A majority of parents said that they would recommend the treatment to others. Conclusion: This is the first qualitative study involving parents of children who were treated with SDF. Most parents were accepting of SDF as a nonsurgical treatment to arrest caries and minimize dentinal sensitivity secondary to caries, although some expressed concern about the black staining in anterior teeth. It is important to adequately inform parents of the negative aesthetic consequences and obtain informed consent before treatment. Knowledge Transfer Statement: This qualitative study revealed that many parents of children with severe ECC are accepting of SDF as a nonrestorative caries management option, despite the black staining of caries lesions. Dental professionals need to be aware of these parental concerns and obtain written informed consent prior to treatment. Parents also requested more information and resources on SDF on its benefits, effectiveness, and any associated risks.

scholarly journals Ozonized Gel Against Four Candida Species: A Pilot Study and Clinical Perspectives

Materials ◽  
2020 ◽  
Vol 13 (7) ◽  
pp. 1731 ◽  
Author(s):  
Vincenzina Monzillo ◽  
Fabiola Lallitto ◽  
Alba Russo ◽  
Claudio Poggio ◽  
Andrea Scribante ◽  
...  
Keyword(s):  
Candida Species ◽  
Inhibition Zone ◽  
Antifungal Drugs ◽  
Diffusion Method ◽  
Beneficial Effects ◽  
Growth Inhibition Zone ◽  
Wide Range ◽  
Fungicide Activity ◽  
Bacteria And Fungi ◽  
Oral Candida

Ozone therapy can display a wide range of clinical beneficial effects, including antimicrobial, immune-stimulant, analgesic, anti-hypoxic actions. However, there is still a paucity of data regarding the ozone fungicide activity. Oral Candida is the most common fungal infection in the mouth among denture wearers and people with weakened immune systems. In the case of generalized candidiasis or immunocompromised patients, systemic therapy is needed, while localized infections are treated with topic medications. However, many Candida strains are resistant to antifungal drugs. The aim of this preliminary analysis is to evaluate the antimycotic efficacy of a new ozonided oil (GeliO3), as a possible terapeutic alternative in local treatments of these infections, compared to chlorhexidine digluconate (Plak gel®). Chlorhexidine is a chemical synthesis disinfectant with a broad-spectrum antiseptic action, active against bacteria and fungi. Antimycotic activity was tested against the following four Candida species: C. albicans, C. parapsilosis, C. glabrata, C. tropicalis, through an agar diffusion method. No significant differences were found between the growth inhibition zone diameters of the ozonized gel and chlorhexidine. The results indicated that the ozonized gel may help to combat Candida infections. Moreover, useful applications could be used to counteract Candida colonization of endosseous implants.

scholarly journals In Vitro Synergistic Interactions of Isavuconazole and Echinocandins against Candida auris

Antibiotics ◽  
2021 ◽  
Vol 10 (4) ◽  
pp. 355
Author(s):  
Unai Caballero ◽  
Sarah Kim ◽  
Elena Eraso ◽  
Guillermo Quindós ◽  
Valvanera Vozmediano ◽  
...  
Keyword(s):  
Interaction Model ◽  
Antifungal Drugs ◽  
Health Concern ◽  
Candida Auris ◽  
Fungistatic Activity ◽  
Drug Concentrations ◽  
Low Concentrations ◽  
Wide Range ◽  
Time Kill

Candida auris is an emergent fungal pathogen that causes severe infectious outbreaks globally. The public health concern when dealing with this pathogen is mainly due to reduced susceptibility to current antifungal drugs. A valuable alternative to overcome this problem is to investigate the efficacy of combination therapy. The aim of this study was to determine the in vitro interactions of isavuconazole with echinocandins against C. auris. Interactions were determined using a checkerboard method, and absorbance data were analyzed with different approaches: the fractional inhibitory concentration index (FICI), Greco universal response surface approach, and Bliss interaction model. All models were in accordance and showed that combinations of isavuconazole with echinocandins resulted in an overall synergistic interaction. A wide range of concentrations within the therapeutic range were selected to perform time-kill curves. These confirmed that isavuconazole–echinocandin combinations were more effective than monotherapy regimens. Synergism and fungistatic activity were achieved with combinations that included isavuconazole in low concentrations (≥0.125 mg/L) and ≥1 mg/L of echinocandin. Time-kill curves revealed that once synergy was achieved, combinations of higher drug concentrations did not improve the antifungal activity. This work launches promising results regarding the combination of isavuconazole with echinocandins for the treatment of C. auris infections.

scholarly journals New Bis-Alkenoic Acid Derivatives from a Marine-Derived Fungus Fusarium solani H915

Marine Drugs ◽  
2018 ◽  
Vol 16 (12) ◽  
pp. 483 ◽  
Author(s):  
Shun-Zhi Liu ◽  
Xia Yan ◽  
Xi-Xiang Tang ◽  
Jin-Guo Lin ◽  
Ying-Kun Qiu
Keyword(s):  
Fusarium Solani ◽  
Zebrafish Embryo ◽  
Pathogenic Fungi ◽  
Fungal Species ◽  
Ionization Mass ◽  
Alkenoic Acid ◽  
Low Concentrations ◽  
Significant Toxicity ◽  
New Compounds ◽  
Acid Esters

Fusarium solani H915 is a fungus derived from mangrove sediments. From its ethyl acetate extract, a new alkenoic acid, fusaridioic acid A (1), three new bis-alkenoic acid esters, namely, fusariumester A1 (2), A2 (3) and B (4), together with three known compounds (5–7), were isolated. The structures of the new compounds were comprehensively characterized by high resolution electrospray ionization-mass spectrometry (HR-ESI-MS), 1D and 2D nuclear magnetic resonance (NMR). Additionally, the antifungal activities against tea pathogenic fungi Pestalotiopsis theae and Colletotrichum gloeosporioides were studied. The new compound, 4, containing a β-lactone ring, exhibited moderate inhibitory activity against P. theae, with an MIC of 50 μg/disc. Hymeglusin (6), a typical β-lactone antibiotic and a terpenoid alkaloid, equisetin (7), exhibited potent inhibitory activities against both fungal species. The isolated compounds were evaluated for their effects on zebrafish embryo development. Equisetin clearly imparted toxic effect on zebrafish even at low concentrations. However, none of the alkenoic acid derivatives exhibited significant toxicity to zebrafish eggs, embryos, or larvae. Thus, the β-lactone containing alkenoic acid derivatives from F. solani H915 are low in toxicity and are potent antifungal agents against tea pathogenic fungi.

scholarly journals Measuring Thiols in Single Cultivar South African Red Wines Using 4,4-Dithiodipyridine (DTDP) Derivatization and Ultraperformance Convergence Chromatography-Tandem Mass Spectrometry

Foods ◽  
2018 ◽  
Vol 7 (9) ◽  
pp. 138 ◽  
Author(s):  
Mpho Mafata ◽  
Maria Stander ◽  
Baptiste Thomachot ◽  
Astrid Buica
Keyword(s):  
South African ◽  
Red Wine ◽  
High Sensitivity ◽  
White Wine ◽  
Wine Aroma ◽  
Low Concentrations ◽  
Varietal Thiols ◽  
Cultivar Differentiation ◽  
First Time ◽  
Ionization Methods

Wine varietal thiols are important contributors to wine aroma. The chemical nature of thiols makes them difficult to measure due to low concentrations, high sensitivity to oxidation, and low ionization. Methods for the measurement of thiols usually consist of multiple steps of sample preparation followed by instrumental measurement. Studies have collected large datasets of thiols in white wine but not in red wine, due to the lack of availability of suitable methods. In this study, for the first time, convergence chromatography was used to measure thiols in red wine at ultratrace levels with improved sensitivity compared to previous methods. Performance parameters (selectivity, linearity, limits of detection, precision, accuracy) were tested to demonstrate the suitability of the method for the proposed application. Red wine thiols were measured in South African Pinotage, Shiraz, and Cabernet Sauvignon wines (n = 16 each). Cultivar differentiation using the thiol profile was demonstrated.

scholarly journals Applications of Silver Diamine Fluoride in Dentistry

2021 ◽  
pp. 163-170
Author(s):  
Sayali Deshpande ◽  
Amit Reche ◽  
Priyanka Paul Madhu ◽  
Kumar Gaurav Chhabra ◽  
Sunaina Mutyalwar
Keyword(s):  
United States ◽  
Early Childhood ◽  
Early Childhood Caries ◽  
Dental Treatment ◽  
Silver Ions ◽  
The United States ◽  
Control Agent ◽  
Silver Diamine Fluoride ◽  
Patient Cooperation ◽  
Childhood Caries

Various studies published in the literature around the world indicate a significant prevalence of early childhood caries (ECC). Treatment of early childhood caries (ECC) using silver diamine fluoride (SDF) has become a viable alternative, particularly for young and anxious children, because traditional restorative treatments is unlikely to combat this prevalent condition. Arrested caries is identified by the hardening of teeth and it changes its color from dark brown to black. More restorative treatments can be performed if necessary. Traditional ECC restorative treatments are not always inexpensive or feasible, as they involve patient cooperation to achieve a satisfactory result. Japan was the first country to promote silver diamine fluoride in 1960. SDF has been used to prevent the spread of caries in various Asian nations, including Japan and China. It was enacted as a fluoride to treat sensitive teeth in the United States by Food and Drug Administration ( FDA). For young children or individuals with specific needs, it is painless and simple to use .The fluoride in SDF stimulates remineralization while the silver ions act as an antimicrobial agent when applied to carious lesions and stop cariogenic biofilms from growing. SDF also prevents future degradation of the dentin's collagen. With a 38 percent use rate, SDF has been utilized in a number of nations. According to a review, SDF is a harmless, economical caries control agent with a wide utilisation in dentistry, and it may meet the WHO Millennium Development Goal (MDG) as well as the United States Institute of Medicine's criteria. The applications of SDF in dental treatment are discussed in this article.

scholarly journals Didymocyrtis epiphyscia, Lichenochora weillii, and Lichenoconium xanthoriae newly recorded from Turkey

Mycotaxon ◽  
2021 ◽  
Vol 136 (2) ◽  
pp. 523-528
Author(s):  
Mustafa Kocakaya
Keyword(s):  
Fungal Species ◽  
First Time

Three lichenicolous fungal species, Didymocyrtis epiphyscia, Lichenochora weillii, and Lichenoconium xanthoriae, are reported for the first time from Turkey. Comments on the taxonomy, ecology, and hosts and photographic illustrations are provided for each species.

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