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Candida tropicalis

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https://www.readbyqxmd.com/read/28223971/response-surface-methodology-for-optimizing-the-production-of-biosurfactant-by-candida-tropicalis-on-industrial-waste-substrates
#1
Darne G Almeida, Rita de Cássia F Soares da Silva, Juliana M Luna, Raquel D Rufino, Valdemir A Santos, Leonie A Sarubbo
Biosurfactant production optimization by Candida tropicalis UCP0996 was studied combining central composite rotational design (CCRD) and response surface methodology (RSM). The factors selected for optimization of the culture conditions were sugarcane molasses, corn steep liquor, waste frying oil concentrations and inoculum size. The response variables were surface tension and biosurfactant yield. All factors studied were important within the ranges investigated. The two empirical forecast models developed through RSM were found to be adequate for describing biosurfactant production with regard to surface tension (R(2) = 0...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28217981/composition-antifungal-and-antiproliferative-activities-of-the-hydrodistilled-oils-from-leaves-and-flower-heads-of-pterocephalus-nestorianus-nab
#2
Fuad O Abdullah, Faiq H S Hussain, Barbara Mannucci, Rosamaria Lappano, Solveig Tosi, Marcello Maggiolini, Giovanni Vidari
This paper reports the first study of the chemical composition, and antifungal and antiproliferative properties of the volatile extracts obtained by hydrodistillation of the flower heads and leaves of the traditional Kurdish medicinal plant P. nestorianus Nab., collected in the wild. A total of fifty-five constituents, 43 of the flower heads' oil (PFO) and 46 of the leaves' oil (PLO), respectively, were identified by GC/MS, constituting 99.68% and 99.04% of the two oils, respectively. The oils were obtained in 0...
February 19, 2017: Chemistry & Biodiversity
https://www.readbyqxmd.com/read/28213809/the-correlation-between-biofilm-production-and-catheter-related-blood-stream-infections-sustained-by-candida-a-case-control-study
#3
Grazia Brunetti, Valeria Visconti, Maria Cristina Ghezzi, Alessandra Giordano, Giammarco Raponi
Biofilm forming capacity of yeasts colonizing the intravenous devices is considered a key factor involved in the pathogenesis of Candida catheter-related bloodstream infections (CCRBSI). The biofilm production of strains of Candida spp. isolated both from the CVC and from the blood of patients with CCRBSI was compared to that of strains isolated from patients not having CCRBSI. Results, expressed in terms of Biofilm Index (BI), revealed that biofilm-producing strains were isolated in the CCRBSI group with a frequency significantly higher than in the non-CCRBSI group (χ(2) = 4...
February 18, 2017: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/28211298/kinneretia-thg-sqi4-mediated-biosynthesis-of-silver-nanoparticles-and-its-antimicrobial-efficacy
#4
Hina Singh, Juan Du, Tae-Hoo Yi
Simple, facile, effective approach for the biosynthesis of silver nanoparticles using Kinneretia species and its antimicrobial activity against human pathogens has been demonstrated in this study. Kinneretia THG-SQI4 has been isolated from soil sample collected from Shangqui, China. The synthesized nanoparticles were characterized by ultraviolet-visible spectrophotometry (UV-vis), field emission transmission electron microscopy (FE-TEM), energy dispersive X-ray spectroscopy (EDX), elemental mapping, selected area diffraction pattern, and X-ray diffraction (XRD)...
May 2017: Artificial Cells, Nanomedicine, and Biotechnology
https://www.readbyqxmd.com/read/28203232/cationic-net-charge-and-counter-ion-type-as-antimicrobial-activity-determinant-factors-of-short-lipopeptides
#5
Katarzyna E Greber, Malgorzata Dawgul, Wojciech Kamysz, Wieslaw Sawicki
To get a better insight into the antimicrobial potency of short cationic lipopeptides, 35 new entities were synthesized using solid phase peptide strategy. All newly obtained lipopeptides were designed to be positively charged from +1 to +4. This was achieved by introducing basic amino acid - lysine - into the lipopeptide structure and had a hydrophobic fatty acid chain attached. Lipopeptides were subjected to microbiological tests using reference strains of Gram-negative bacteria: Escherichia coli, Klebsiella pneumoniae, Proteus vulgaris, Pseudomonas aeruginosa, Gram-positive bacteria: Staphylococcus aureus, Staphylococcus epidermidis, Bacillus subtilis, Enterococcus faecalis, and fungi: Candida albicans, Candida tropicalis, Aspergillus brasiliensis...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28198976/role-of-candida-species-from-hiv-infected-children-in-enamel-caries-lesions-an-in-vitro-study
#6
Senda Charone, Maristela Barbosa Portela, Karol de Oliveira Martins, Rosangela Maria Soares, Gloria Fernanda Castro
Objectives: This study analyzed the capacity of Candida spp. from dental biofilm of HIV infected (HIV+) children to demineralize primary molar enamel in vitro by Transversal Microhardness (TMH), Polarized Light Microscopy (PLM) and the quantity of calcium ions (Ca2+) released from the enamel. Material and Methods: Candida spp. samples were isolated from the supragingival biofilm of HIV+ children. A hundred and forty (140) enamel blocks were randomly assigned to six groups: biofilm formed by C...
January 2017: Journal of Applied Oral Science: Revista FOB
https://www.readbyqxmd.com/read/28186162/multilocus-sequence-analyses-reveal-extensive-diversity-and-multiple-origins-of-fluconazole-resistance-in-candida-tropicalis-from-tropical-china
#7
Jin-Yan Wu, Hong Guo, Hua-Min Wang, Guo-Hui Yi, Li-Min Zhou, Xiao-Wen He, Ying Zhang, Jianping Xu
Candida tropicalis is among the most prevalent human pathogenic yeast species, second only to C. albicans in certain geographic regions such as East Asia and Brazil. However, compared to C. albicans, relatively little is known about the patterns of genetic variation in C. tropicalis. This study analyzed the genetic diversity and relationships among isolates of C. tropicalis from the southern Chinese island of Hainan. A total of 116 isolates were obtained from seven geographic regions located across the Island...
February 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28165440/antimicrobial-efficacy-of-probiotic-containing-toothpastes-an-in-vitro-evaluation
#8
Ivana Parčina Amižić, Livia Cigić, Lidia Gavić, Marina Radić, Dolores Biočina Lukenda, Marija Tonkić, Ivana Goić Barišić
Aim To evaluate, in vitro antimicrobial ability of two probiotic toothpastes (one containing Lactobacillus paracasei, other containing Lactobacillus acidophilus) and one toothpaste without probiotic separately, and in a combination with two different mouthrinses (one containing essential oils and the other containing hexitidine). Methods Antimicrobial susceptibility was checked by using the ditch method and Clinical Laboratory Standard Institute (CLSI) guidelines. Two different toothpastes with probiotic, toothpaste without probiotic and two different mouthrinses were tested against the following selected microorganisms: Candida albicans, Candida tropicalis, Enterococcus faecalis, Streptococcus salivarius and Staphylococcus aureus...
February 1, 2017: Medicinski Glasnik
https://www.readbyqxmd.com/read/28159362/fungicidal-efficacy-of-various-honeys-against-fluconazole-resistant-candida-species-isolated-from-hiv-patients-with-candidiasis
#9
H Shokri, A Sharifzadeh
OBJECTIVE: Honey is well known to possess a broad spectrum of activity against medically important organisms. The purpose of this study was to assess the antifungal activity of different honeys against 40 fluconazole (FLU) resistant Candida species, including Candida albicans (C. albicans), Candida glabrata, Candida krusei and Candida tropicalis. MATERIALS AND METHODS: Three honey samples were collected from northern (Mazandaran, A), southern (Hormozgan, B) and central (Lorestan, C) regions of Iran...
January 31, 2017: Journal de Mycologie Médicale
https://www.readbyqxmd.com/read/28154488/antifungal-activity-of-lactic-acid-bacteria-strains-isolated-from-natural-honey-against-pathogenic-candida-species
#10
Bulgasem Y Bulgasem, Mohd Nizam Lani, Zaiton Hassan, Wan Mohtar Wan Yusoff, Sumaya G Fnaish
The role of lactic acid bacteria (LAB) in honey as antifungal activity has received little attention and their mechanism of inhibitory of fungi is not fully understood. In this study, LAB were isolated from honey samples from Malaysia, Libya, Saudi Arabia, and Yemen. Twenty-five isolates were confirmed LAB by catalase test and Gram staining, and were screened for antifungal activity. Four LAB showed inhibitory activity against Candida spp. using the dual agar overlay method. And they were identified as Lactobacillus plantarum HS isolated from Al-Seder honey, Lactobacillus curvatus HH isolated from Al-Hanon honey, Pediococcus acidilactici HC isolated from Tualang honey and Pediococcus pentosaceus HM isolated from Al-Maray honey by the 16S rDNA sequence...
December 2016: Mycobiology
https://www.readbyqxmd.com/read/28149166/phenolic-composition-and-medicinal-usage-of-psidium-guajava-linn-antifungal-activity-or-inhibition-of-virulence
#11
Maria F B Morais-Braga, Joara N P Carneiro, Antonio J T Machado, Débora L Sales, Antonia T L Dos Santos, Aline A Boligon, Margareth L Athayde, Irwin R A Menezes, Djair S L Souza, José G M Costa, Henrique D M Coutinho
Psidium guajava is a Myrtaceae plant whose medicinal properties are recognized in several locations. The use of teas and tinctures prepared from their leaves has been used to combat infections caused by fungi of the genus Candida. In this study, aqueous extracts of leaves and hydroethanolic were tested to verify the antifungal potential and its chemical composition has been investigated. The microbiological assays were performed by broth microdilution to determine the minimum inhibitory concentration (MIC) and from these the minimum fungicidal concentration was performed (MFC) by subculturing on solid media...
February 2017: Saudi Journal of Biological Sciences
https://www.readbyqxmd.com/read/28138369/distribution-and-drug-susceptibility-of-candida-spp-associated-with-female-genital-tract-infection-chongqing-china
#12
Xiaodong Luo, Xiaojing Dong, Zhi Pen
BACKGROUND: Vulvovaginal candidiasis is defined as vulvovaginitis associated with vaginal carriage of Candida spp. and is a common problem with a high rate of morbidity. OBJECTIVES: To investigate the distribution of Candida spp. and evaluate the corresponding antifungal susceptibility in women with genital tract infection in Chongqing, southwestern China. PATIENTS AND METHODS: Samples (n = 2.129) were obtained from female patients with symptoms of genital tract infection...
October 2016: Jundishapur Journal of Microbiology
https://www.readbyqxmd.com/read/28131069/oral-candidal-speciation-virulence-and-antifungal-susceptibility-in-type-2-diabetes-mellitus
#13
Pratik N Patel, Parul Sah, Chetana Chandrashekar, Sudha Vidyasagar, J Venkata Rao, Mradul Tiwari, Raghu Radhakrishnan
OBJECTIVES: To determine the oral candidal carriage (OCC), activity of virulent factors and fluconazole susceptibility in subjects with type 2 diabetes mellitus (T2DM) and investigate their association with HbA1c measurements. MATERIALS AND METHODS: A cross sectional study was conducted on 100 diabetics and 100 healthy volunteers. The virulence was assessed by measuring the phospholipase activity and proteolysis index. Fluconazole susceptibility was performed using the gradient diffusion method...
January 17, 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28124963/-evaluation-of-pna-fish-method-for-direct-identification-of-candida-species-in-blood-culture-samples-and-its-potential-impact-on-guidance-of-antifungal-therapy
#14
Özlem Doğan, Ahmet Çağkan İnkaya, Dolunay Gülmez, Ömrüm Uzun, Murat Akova, Sevtap Arıkan Akdağlı
Early antifungal therapy has a major influence on survival in candidemia. Rapid identification of the species has importance for the treatment, prediction of the species-specific primary resistance and variable antifungal susceptibility. Recently, molecular-based methods attempt to reduce the time between the positive signal of a blood culture and identification of the fungus. PNA-FISH (Peptide nucleic acid fluorescence in situ hybridization) assay distinguishes a number of frequently isolated Candida species in groups following the growth in blood culture...
October 2016: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/28124220/in-vitro-antifungal-susceptibility-of-oral-candida-isolates-from-patients-suffering-from-caries-and-chronic-periodontitis
#15
Janire De-la-Torre, María Esther Ortiz-Samperio, Cristina Marcos-Arias, Xabier Marichalar-Mendia, Elena Eraso, María Ángeles Echebarria-Goicouria, José Manuel Aguirre-Urizar, Guillermo Quindós
Caries and chronic periodontitis are common oral diseases where a higher Candida colonization is reported. Antifungal agents could be adjuvant drugs for the therapy of both clinical conditions. The aim of the current study has been to evaluate the in vitro activities of conventional and new antifungal drugs against oral Candida isolates from patients suffering from caries and/or chronic periodontitis. In vitro activities of amphotericin B, fluconazole, itraconazole, miconazole, nystatin, posaconazole and voriconazole against 126 oral Candida isolates (75 Candida albicans, 18 Candida parapsilosis, 11 Candida dubliniensis, six Candida guilliermondii, five Candida lipolytica, five Candida glabrata, four Candida tropicalis and two Candida krusei) from 61 patients were tested by the CLSI M27-A3 method...
January 25, 2017: Mycopathologia
https://www.readbyqxmd.com/read/28120548/ds6-anticandidal-antibiofilm-peptide-against-candida-tropicalis-and-exhibit-synergy-with-commercial-drug
#16
Kusum Singh, Shashank Shekhar, Yudhishthir Yadav, Immaculata Xess, Sharmistha Dey
Antifungal peptides have gained interest as therapeutic agents in recent years because of increased multidrug resistance against present antifungal drugs. This study designed, synthesized and characterized antifungal activity of a small peptide analogue, DS6. This peptide was designed using the template from the N-terminal part of the antifungal protein, Aspergillus giganteous. DS6 inhibited Candida tropicalis (ATCC 13803), as well as its clinical isolates. DS6 was found to be a fungicidal, killing the fungus very rapidly...
January 25, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28117709/microbiological-contamination-at-workplaces-in-a-combined-heat-and-power-chp-station-processing-plant-biomass
#17
Justyna Szulc, Anna Otlewska, Małgorzata Okrasa, Katarzyna Majchrzycka, Michael Sulyok, Beata Gutarowska
The aim of the study was to evaluate the microbial contamination at a plant biomass processing thermal power station (CHP). We found 2.42 × 10³ CFU/m³ of bacteria and 1.37 × 10⁴ CFU/m³ of fungi in the air; 2.30 × 10⁷ CFU/g of bacteria and 4.46 × 10⁵ CFU/g of fungi in the biomass; and 1.61 × 10² CFU/cm² bacteria and 2.39 × 10¹ CFU/cm² fungi in filtering facepiece respirators (FFRs). Using culture methods, we found 8 genera of mesophilic bacteria and 7 of fungi in the air; 10 genera each of bacteria and fungi in the biomass; and 2 and 5, respectively, on the FFRs...
January 21, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28115353/in-vitro-antifungal-susceptibility-testing-of-candida-isolates-with-the-eucast-methodology
#18
J Meletiadis, I Curfs-Breuker, J F Meis, J W Mouton
The in vitro susceptibility of 1119 molecularly identified clinical Candida isolates against 8 antifungal drugs was determined using the EUCAST microdilution method. A new simple, objective and mathematically solid method for ECOFF determination was developed by derivatizing the MIC distribution and determining a dECOFF as the highest MIC with the maximum second derivative giving similar results (95% agreement within 1 dilution) with the "eyeball" method. Overall, low non-wild type/resistant rates were found with the highest found for azoles with C...
January 23, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28109554/clinical-and-microbiological-characteristics-of-bloodstream-infections-among-patients-with-haematological-malignancies-with-and-without-neutropenia-at-a-medical-centre-in-northern-taiwan-2008-2013
#19
Chien-Yuan Chen, Feng-Ming Tien, Wang-Huei Sheng, Shang-Yi Huang, Ming Yao, Jih-Luh Tang, Woei Tsay, Hwei-Fang Tien, Po-Ren Hsueh
This study aimed to investigate the epidemiology and microbiology of bloodstream infections (BSIs) in patients with haematological malignancies. Clinical characteristics and microbiology of 2083 patients with haematological malignancy who were treated for BSI from 2008 to 2013 at a medical centre in Taiwan were retrospectively reviewed. Lymphoma (38.1%) was the most common, followed by acute myeloid leukaemia (30.9%). Of the 2090 non-duplicate BSI isolates, 1310 (62.7%) were recovered from patients with neutropenia...
January 3, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28100993/cdc-group-eo-4-and-candida-tropicalis-peritonitis-in-a-patient-on-peritoneal-dialysis-after-upper-endoscopy-colonoscopy-and-coil-embolization-of-the-gastroduodenal-artery
#20
Shameek Gayen, Yonah Ziemba, Shikha Jaiswal, Adam Frank, Yasmin Brahmbhatt
Peritoneal dialysis (PD) is an excellent form of renal replacement therapy for many patients with end-stage renal disease (ESRD). Over 10,000 patients receive PD in the United States [United States Renal Data System: 2015 USRDS Annual Data Report: Epidemiology of Kidney Disease in the United States, 2015]. PD has superior outcomes compared to hemodialysis in the first 2 years of ESRD [Sinnakirouchenan and Holley: Adv Chronic Kidney Dis 2011;18: 428-432]. However, peritonitis is a known complication and may result in significant morbidity and necessitate transition to hemodialysis, which increases medical costs [Holley and Piraino: Semin Dial 1990;3: 245-248]...
September 2016: Case Reports in Gastroenterology
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