scholarly journals Prevalence and Antifungal Susceptibility Pattern of Candida Isolates from Women with Recurrent Vulvovaginal Candidiasis in Ghana - A Review of Laboratory Reports.

2020 ◽  
Author(s):  
George Antepim Pesewu ◽  
Patrick Kwame Feglo ◽  
Richard Kwaku Boateng ◽  
Samuel Adetona Fayemiwo
Keyword(s):  
Antifungal Susceptibility ◽  
Rflp Analysis ◽  
Vulvovaginal Candidiasis ◽  
Diffusion Method ◽  
Childbearing Age ◽  
Candida Spp ◽  
Disk Diffusion Method ◽  
Recurrent Vulvovaginal Candidiasis ◽  
Pcr Rflp ◽  
Common Infection

Abstract Vulvovaginal candidiasis (VVC) is a common infection among women of childbearing age, and few of these women experience recurrent vulvovaginal candidiasis (RVVC). The study was aimed at determining the virulent factors, and antifungal susceptibility of the Candida species isolated from women with RVVC attending the Nkawie Government Hospital, Ashanti-Region, Ghana. Over a 6–month period (October 2016 to March 2017), a total of 288 women with RVVC were evaluated. Isolation of the yeast was performed after the inoculation of the vaginal specimens onto Sabouraud Dextrose Agar (SDA), and incubated for 24-48 hours at 37oC. The isolates were identified by standardized conventional methods. The enzymatic activities of esterase, phospholipase, haemolysis and biofilm production were evaluated for the identification of the yeast isolates. Susceptibility to antifungal agents was determined by using the Kirby-Bauer disk diffusion method. Azole resistant isolates were further tested for ERG11 gene which encodes the enzyme (cytochrome P450 lanosterol 14-α-demethylase) by the polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) analysis. Vaginal swabs cultures of 200 women (64.4) from 288 samples yielded Candida species. Candida albicans was the commonest isolated specie (33.0%), followed by Candida glabrata (29.5 %), Candida tropicalis (23.0%), and Candida krusei (15.5%). Hemolysin production, phospholipase enzyme activity, and biofilms formation were found in 84.5%, 83%, 77.5%.of the isolates respectively. Most phospholipase producing Candida isolates also formed biofilms. All Candida spp isolated were susceptible to itraconazole while majority of them were resistant to voriconazole. ERG11 genes were detected in 11.1% of Azole resistant Candida species. There is a significant increase in the rate of antifungal resistance among the Candida isolates to fluconazole and voriconazole. There is need for continuous surveillance as well as antifungal susceptibility testing on the Candida spp to guide therapy. A larger epidemiological study is also advocated to determining the degree of spread of ERG11 genes.

scholarly journals Antifungal Susceptibility and Biofilm Production of Candida spp. Isolated from Clinical Samples

2018 ◽  
Vol 2018 ◽  
pp. 1-5 ◽  
Author(s):  
Munmun B. Marak ◽  
Biranthabail Dhanashree
Keyword(s):  
Antifungal Susceptibility ◽  
Clinical Information ◽  
Antibiotic Use ◽  
Microtiter Plate ◽  
Vaginal Swab ◽  
Diffusion Method ◽  
Clinical Samples ◽  
Candida Spp ◽  
Disk Diffusion Method ◽  
Biofilm Production

Objective. The study aims to speciate clinical Candida isolates and detect their biofilm-forming ability and antifungal resistance. Methods. All the Candida spp. isolated from different clinical samples like pus, urine, blood, and body fluid were included in the study. Biofilm production was tested by the microtiter plate method. Antifungal susceptibility was studied by the disk diffusion method. Patient’s demographic details such as age, sex, and clinical information were collected. Presence of other risk factors such as diabetes mellitus, history of antibiotic use, and any urinary tract instrumentations was also recorded. Results. Among 90 Candida species isolated, most predominant species was found to be C. albicans (45.5%) followed by C. tropicalis (28.88%), C. krusei (20%), C. glabrata (3.33%), and C. parapsilosis (2.22%). Candida spp. were isolated from urine (43%), BAL/sputum (18.88%), high vaginal swab (8.88%), suction tips (7.77%), blood and wound swabs (6.66%), pus (3.33%), bile aspirate (2.22%), and deep tissue (1.11%). A larger number of females were affected than males, and the age group of 51 to 60 years was more susceptible to candidiasis. A higher number of C. albicans isolates produced biofilm followed by C. parapsilosis, C. tropicalis, and C. krusei. However, C. glabrata showed no biofilm production in our study. All Candida isolates were 100% sensitive to amphotericin B. Voriconazole was the next effective drug with 81.11% susceptibility. 24.44% of strains were resistant to fluconazole. Conclusion. Speciation of Candida isolates, detection of ability to form the biofilm, and monitoring of antifungal susceptibility testing are necessary for appropriate treatment.

scholarly journals Antifungal Resistant in Non-Albicans Candida Species are Emerging as a Threat to Antenatal Women with Vulvovaginal Candidiasis

2019 ◽  
Vol 12 (3) ◽  
pp. 1369-1378
Author(s):  
Kanishka Hrishi Das ◽  
V. Mangayarkarasi ◽  
Maitrayee Sen
Keyword(s):  
Candida Species ◽  
Antifungal Susceptibility ◽  
Economic Cost ◽  
Vulvovaginal Candidiasis ◽  
Diffusion Method ◽  
Resistance Pattern ◽  
Disk Diffusion Method ◽  
Vaginal Swabs ◽  
Empirical Antifungal Therapy ◽  
Considerable Morbidity

Vulvovaginal candidiasis (VVC) is caused by Candida species. It has been associated with impact on economic cost. Currently, Non-albicans Candida species are more resistant to azoles and get converted from harmless to pathogenic state due to several virulence factors. Monitoring of the antifungal susceptibility pattern is important to know the resistant pattern of Candida species. Thus the objective of this research was to the identification of Candida in species level and to evaluate the antifungal resistance pattern in Candida species isolated from the vaginal discharge of antenatal women with vulvovaginal candidiasis. This prospective study was done in SRM MCH & RC, Chennai, India, from March 2017 and December 2018. An aggregate of 342 vaginal swabs were gathered from antenatal women of symptomatic and asymptomatic VVC. Antifungal susceptibility test was done by the disk diffusion method as per the CLSI guidelines. A total of 112 Candida species were isolated from 342 high vaginal swabs. Out of 112 Candida isolates, 65 (58%) were Non-albicans Candida (NAC) and 47 (42%) were C. albicans. In this study, 103/112(91.6%) of Candida isolates had the highest sensitivity to voriconazole and 26/112(23.2%) of Candida isolates had the highest resistance to miconazole. NAC species are emerging as potential threats to cause infection and posing a therapeutic challenge. Early empirical antifungal therapy and further research to improve diagnostic, prevention and therapeutic strategies are necessary to reduce the considerable morbidity and mortality.

scholarly journals Antifungal susceptibility of clinically significant candida species by disk diffusion method

2021 ◽  
Vol 7 (2) ◽  
pp. 77-80
Author(s):  
Ajitha Reddy Edula
Keyword(s):  
Antifungal Agents ◽  
Susceptibility Testing ◽  
Antifungal Susceptibility ◽  
Antifungal Susceptibility Testing ◽  
Susceptibility Test ◽  
Disk Diffusion ◽  
Diffusion Method ◽  
Candida Spp ◽  
Disk Diffusion Method ◽  
Antifungal Susceptibility Test

Antifungal susceptibility of candida. To perform antifungal susceptibility testing on candida isolates by disk diffusion method & study its susceptibility pattern. The present study was conducted in the department of Microbiology in a tertiary care hospital in Hyderabad from January 2013 to June 2014, with prior approval of the Institutional Ethics Committee. The present study was designed to perform antifungal susceptibility test on Candida isolates by Disk Diffusion Method and study its susceptibility pattern. 102 Candida isolates were subjected to Antifungal susceptibility testing by Disk diffusion method using Mueller-Hinton Agar + 2% Glucose and 0.5 μg/mL Methylene Blue Dye (GMB) Mediumas per CLSI guidelines. : Antifungal susceptibility test shows that C. albicans is more susceptible to all the antifungal agents tested. Resistance to azole group of drugs was more pronounced in non-albicans candida spp. Voriconazole seemed to be superior to Fluconazole with a better susceptibility in the Fluconazole resistant strains also.Findings of the antifungal susceptibility test suggest that Candida spp., differ in their susceptibility to antifungal agents. Antifungal susceptibility testing of Candida isolates will be helpful in guiding physicians to select the appropriate antifungal drug so that therapeutic failures can be avoided thus decreasing patient morbidity and mortality.

scholarly journals Speciation Of Candida Isolated From Cases Of Vaginal Candidiasis

2021 ◽  
Vol 2 (1) ◽  
pp. 5-13
Author(s):  
Ankita Guragain ◽  
Ramesh Bichchha
Keyword(s):  
Candida Species ◽  
Reproductive Tract ◽  
Antifungal Susceptibility ◽  
Microscopic Analysis ◽  
Female Reproductive Tract ◽  
Vaginal Candidiasis ◽  
Diffusion Method ◽  
Candida Spp ◽  
Disk Diffusion Method ◽  
Vaginal Swabs

Background: Vulvovaginal Candidiasis (VVC) is an exceedingly common mucosal infection of the lower female reproductive tract. Mostly, it is caused by Candida albicans. Yet, non-albicans Candida species are also on the rise. Also, increasing resistance to commonly prescribed antifungal agents is of serious concern. Methodology: High vaginal swabs were collected from clinically suspected cases of VVC from patients attending outpatient department of Obstetrics and Gynecology of NMCTH. The swabs were subjected to microscopic analysis and culture. Germ tube test, CHROMagar, chlyamydospore formation test and sugar assimilation test were applied for identification of the isolated Candida spp. Antifungal susceptibility testing of the isolates to fluconazole was done by disk-diffusion method. Results: The rate of culture positive cases of VVC was 46.3%. Most number of cases belonged to the age group of 18-27 years (43.6%). Adhibasi-janajati and married women were most commonly affected (55.9% and 62.3% respectively). Abnormal vaginal discharge with burning and itching were the most common symptoms. C. albicans accounted for the majority of the isolated Candida spp. (57.8%), followed by C. glabrata (26.5%) and C. tropicalis (9.8%), C. krusei (3.0%), C. parapsilosis (2.0%) and C. keyfr (0.9%). A total of 34.3% of isolated Candida spp. were resistant to fluconazole. Conclusion: Both C. albicans and non-albicans Candida species were responsible for acute cases of VVC and RVVC. A majority of nonalbicans Candida species were found to be resistant suggesting rise in their prevalence and resistance to fluconazole.

Value of antifungal susceptibility testing in recurrent vulvovaginal Candidiasis by Non -Albicans Candida

2021 ◽  
Vol 30 (1) ◽  
pp. 161-167
Author(s):  
Ghada A. Mokhtar ◽  
Mohamed Sh. Ramadan ◽  
Shymaa Yahia
Keyword(s):  
Amphotericin B ◽  
Candida Species ◽  
Antifungal Susceptibility ◽  
High Sensitivity ◽  
Common Species ◽  
Vulvovaginal Candidiasis ◽  
Recurrent Vulvovaginal Candidiasis ◽  
Sensitivity Pattern ◽  
Vaginal Swabs ◽  
Vitek 2

Background: Vulvovaginal candidiasis (VVC) is regarded as a prevalent vaginal infection and mainly results from Candida albicans. Nevertheless, there has recently been a prominent shift in candidiasis etiology regarding non-albicans Candida (NAC) species with achieving importance. For women with more than three episodes annually are described as recurrent vulvovaginal candidiasis (RVVC). Objectives: To isolate, speciate, and determine the value of antifungal sensitivity pattern of candida species isolated from patients developed (RVVC). Methodology: High vaginal swabs (HVS) were taken from patients with RVVC and cultured on ordinary mycological media. Any significant candida growth was identified and speciated by VITEK 2 system. Their antifungal sensitivity was done by disc diffusion approach governed by CLSI guidelines. Results: A total of 110 Candida species from 250 high vaginal swabs were isolated. Among all candida species isolated from patients with RVCC, C.albicanis accounts for 44% while NAC accounts for 56% with C.glabrata most common species isolated. Voriconazole, amphotericin B, and nystatin showed high sensitivity rates (92 %, 89%, and 84% respectively) on all candida species (C.albicans and NAC) isolated from patients with RVVC. Conclusion: In RVCC there is increase in NAC (56%) with C.glabrata most common species isolated. Voriconazole, Nystatin, and amphotericin B have the best antifungal activity against all spp.

scholarly journals Evaluation of antifungal activity of Terminalia subspathulata bark and fruit extracts against azole-resistant Candida isolates

2021 ◽  
Vol 3 (12) ◽  
Author(s):  
Hassan Yahaya ◽  
Sharif Alhassan Abdullahi ◽  
Yahaya Yakubu
Keyword(s):  
Antifungal Susceptibility ◽  
Diffusion Method ◽  
Bark Extract ◽  
Zone Of Inhibition ◽  
Fruit Extract ◽  
Alternative Source ◽  
Disk Diffusion Method ◽  
Severe Problem ◽  
Fruit Extracts ◽  
Methanolic Extracts

Background: Emerging resistant Candida species become a severe problem for public health. The study aims to examine the efficacy of Terminalia subspathulata bark and fruit extracts as an alternative source of antifungals for resistant strains of Candida species. Methodology: Candida albicans was isolated between 4–5th interdigital foot space and C. parapsilosis were isolated from the left-hand third finger of male patients. Morphological and molecular methods identified the isolates. Antifungal susceptibility testing (AFST) was determined using azole derivatives, amphotericin B (AmpB) and echinocandins based on E-test and broth microdilution (BMD) methods. The AFST activity of the 10 μL methanolic extracts with concentrations between 1.25–10 mg/mL was assessed by disk diffusion method according to CLSI guidelines. Results: The AFST results showed total resistance to all azoles (FLU, MIC ≥ 256 μg/ml and VOR, ITR and POS each with MIC ≥ 32 μg/ml). The BMD method agreed with E-test MICs. The T. subspathulata bark extract tested indicated activity on the C. albicans lawn with the zone of inhibition between 9–13 mm. The fruit extract indicated zone between 8–10 mm. Candida parapsilosis indicated susceptibility to bark extract with the zone of inhibition between 10–15 mm, while the fruit extract showed zone between 8–13 mm. Conclusion: Despite azole resistance, the extracts showed good activity against the isolates. Findings showed alternatives to AmpB and echinocandins because of toxicity and parenteral administration, respectively. Based on our findings, our study first reports the medicinal value of T. subspathulata.

scholarly journals Accuracy in clinical examinations for the diagnosis of vulvovaginitis by CANDIDA SPP. and IN VITRO susceptibility to the main antifungals

2020 ◽  
Vol 49 (3) ◽  
Author(s):  
Andressa Santana Santos ◽  
Ana Laura Sene Amancio Zara ◽  
Fábio Silvestre Ataídes ◽  
Elisangela Gomes da Silva ◽  
Vivianny Aparecida Queiroz Freitas ◽  
...  
Keyword(s):  
Amphotericin B ◽  
Clinical Diagnosis ◽  
High Resistance ◽  
Antifungal Susceptibility ◽  
Vulvovaginal Candidiasis ◽  
Vaginal Mucosa ◽  
Candida Spp ◽  
In Vitro Susceptibility ◽  
Gynecology And Obstetrics

Vulvovaginal candidiasis (VVC) is a common infection. This work aims to determine the positive predictive value (PPV) of the clinical diagnosis of VVC and to characterize Candida species isolated from the vaginal mucosa. This cross-sectional study was conducted from February 2016 to February 2017 at the Gynecology and Obstetrics Outpatient Clinic of the Hospital das Clínicas, in Goiânia, Goiás State, Brazil. The study included samples of vaginal secretion from 55 women who complained of vaginal discharge and itching as their main symptoms. The PPV of the clinical diagnosis of VVC was estimated in comparison to the laboratory culture method. The phenotypic methods and molecular tests were performed to identify Candida spp. In vitro susceptibility of Candida spp. isolates to fluconazole, itraconazole, clotrimazole, nystatin, and amphotericin B was determined using the broth microdilution assay. Yeast growth using the enzymes protease, phospholipase, and hemolysin was carried out in media containing respectively bovine albumin, egg yolk, and sheep erythrocytes. A PPV of 61.8% (34/55) was determined. Among the 55 vulvovaginal samples collected, we identified 36 isolates in whichC. albicans was the most common species. High resistance to fluconazole and low minimal inhibitory concentration (MIC) values for clotrimazole, nystatin and amphotericin B were observed. All isolates were proteinase and hemolysin producers, while seven strains were phospholipase negative. The clinical diagnosis of VVC presented a moderate PPV, which meant that cultures had to be conducted in the laboratory to confirm infection. The high resistance to fluconazole and itraconazole indicated the importance of the in vitro susceptibility test.KEY WORDS: Vulvovaginal candidiasis; antifungal susceptibility; enzymatic activity

scholarly journals Antifungal Susceptibility of Malassezia pachydermatis Isolates from Dogs

2019 ◽  
Vol 63 (2) ◽  
pp. 15-20
Author(s):  
Z. Sihelská ◽  
E. Čonková ◽  
P. Váczi ◽  
M. Harčárová
Keyword(s):  
Antifungal Agents ◽  
Antifungal Susceptibility ◽  
Diffusion Method ◽  
Opportunistic Pathogens ◽  
Ear Canal ◽  
Disk Diffusion Method ◽  
Malassezia Pachydermatis ◽  
Resistant Strains ◽  
Standard Disk

Abstract The genus Malassezia belongs to Basidiomycota and includes 16 species, from which M. pachydermatis is the most common in dogs. M. pachydermatis is a member of the normal mycobiota of the skin and mucosal sites of dogs. Under certain conditions, these yeasts can be opportunistic pathogens and involved skin and ear canal infections of these animals. Topical and oral antifungal agents are used for the therapy of Malassezia dermatitis and otitis. With the expanding use of antifungal agents, resistant strains of Malassezia are increasingly detected. In this study, the susceptibility of 40 M. pachydermatis isolates to fluconazole, itraconazole, ketoconazole, clotrimazole and nystatin were evaluated in vitro based on the modified standard disk diffusion method M44-2A.

QSAR Study of Some 1,3-Oxazolylphosphonium Derivatives as New Potent Anti-Candida Agents and Their Toxicity Evaluation

2019 ◽  
Vol 16 (2) ◽  
pp. 204-209
Author(s):  
Maria M. Trush ◽  
Vasyl Kovalishyn ◽  
Alla D. Ocheretniuk ◽  
Oleksandr L. Kobzar ◽  
Maryna V. Kachaeva ◽  
...  
Keyword(s):  
Fungal Infections ◽  
Electric Organ ◽  
Biological Marker ◽  
Diffusion Method ◽  
Phosphonium Salts ◽  
Candida Spp ◽  
Qsar Study ◽  
Disk Diffusion Method ◽  
Qsar Models

Background: The incidence of invasive fungal infections caused by Candida spp. has increased continuously in recent decades, especially in populations of immunocompromised patients or individuals hospitalized with serious underlying diseases. Therefore, the goal of our study was the search for new potent Candida albicans inhibitors via the development of QSAR models that could speed up this search process. A number of the most promising 1,3-oxazol-4-yltriphenylphosphonium derivatives with predicted activities were synthesized and experimentally tested. Furthermore, the toxicity of the studied compounds was determined in vitro using acetylcholinesterase enzyme as a biological marker. Methods: The classification QSAR models were created using Random Forests (WEKA-RF), k-Nearest Neighbors and Associative Neural Networks methods and different combinations of descriptors on the Online Chemical Modeling Environment (OCHEM) platform. Аntifungal properties of the investigated compounds were performed using standard disk diffusion method. The enzyme inhibitory action of the compounds was determined by modified Ellman's method using acetylcholinesterase from the electric organ of Electrophorus electricus. Results: Three classification QSAR models were developed by the WEKA-RF, k-NN and ASNN methods using the ALogPS, E-State indices and Dragon v.7 descriptors. The predictive ability of the models was tested through cross-validation, giving a balanced accuracy BA = 80-91%. All compounds demonstrated good antifungal properties against Candida spp. and slight inhibition of the acetylcholinesterase activity. Conclusion: The high percentage of coincidence between the QSAR predictions and the experimental results confirmed the high predictive power of the developed QSAR models that can be applied as tools for finding new potential inhibitors against Candida spp. Furthermore, 1,3-oxazol-4- yl(triphenyl)phosphonium salts could be considered as promising candidates for the treatment of candidiasis and the disinfection of medical equipment.

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