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2.
Braz. J. Pharm. Sci. (Online) ; 58: e19248, 2022. tab, graf
Article in English | LILACS | ID: biblio-1384018

ABSTRACT

The first report about antimicrobial resistance was published in the 1940s. And today, the antimicrobial resistance has become a worldwide problem. Because of this problem, there is a need to develop new drugs. That's why we synthesized some novel thiazolidine-4-one derivatives and evaluated their antimicrobial activity. The final compounds were obtained by reacting 2-[(4,5-diphenylthiazol-2-yl)imino]thiazolidin-4-one with some aryl aldehydes. The synthesized compounds were investigated for their antimicrobial activity against four Candida species, five gram-negative and four gram-positive bacterial species. The lead compounds (4a- h) were obtained with a yield of at least 70%. All compounds showed antimicrobial activity. Compound 4f (MIC: 31.25 µg/ml) exhibited more efficacy than the other compounds against C. glabrata (ATCC 24433). Compound 4b (MIC: 62.5 µg/ml) was the most active compound against all bacterial species, particularly K. pneumoniae (NCTC 9633). Whereas, compound 4c (MIC: <31.25 µg/ml) was observed as the most active compound against E. coli (ATCC 25922). In general, all compounds (4a-4h) showed antimicrobial activity against all fungi and bacterial species. Compounds 4b (2,6-dichlorobenzylidene), 4c (2,6-dihydroxybenzylidene), 4f (1H-pyrrol-2- yl)methylene), 4g (4-triflouromethylbenzylidene) and 4h (2,3,4-trimethoxybenzylidene) were determined as the most active compounds


Subject(s)
Azoles , Thiazoles/analysis , Candida/classification , Thiazolidines/analysis , Reference Drugs , Research Report , Lead/agonists
3.
Braz. J. Pharm. Sci. (Online) ; 58: e18719, 2022. tab, graf
Article in English | LILACS | ID: biblio-1364412

ABSTRACT

Abstract The aim of present study was calculate the Minimum inhibitory concentrations (MICs) of silver nanoparticles and clotrimazole for Candida species and their interaction by the adaptation of standarized methods. The MICs values of clotrimazole were 9 E-04-3 E-03 ug/ml, 0.1-0.6 ug/ml, 3 E-03- 0.1 ug/ml and 3 E-03-0.3 ug/ml for Candida albicans susceptible to fluconazole, Candida albicans resistance to fluconazole, Candida krusei and Candida parapsilosis respectively. The MICs values of silver nanoparticles were 26.50- 53 ug/ml; 26.50-106 ug/ml; 106-212 ug/ ml and 26.50- 53 ug/ml for Candida albicans susceptible to fluconazole, Candida albicans resistance to fluconazole, Candida krusei and Candida parapsilosis respectively. Synergism between clotrimazole and silver nanoparticles was measured by checkerboard BMD (broth microdilution) test and shown only for C. albicans susceptible to fluconazole because the fractional inhibitory concentrations (FICs) values were 0.07 - 0.15 ug/ml. Indifference was shown for the other species tested because the FICs values were between 0.5 - 2- 3.06 ug/ml. The results suggest synergistic activity depending on the fungus species analysed, however we recommend the incorporation of others measurement methodologies to confirm our results. As for measurement methodologies of MICs of silver nanoparticles and clotrimazole international normative were respected to guarantee reproducible and comparable results.


Subject(s)
Candida/classification , Clotrimazole/analogs & derivatives , Nanoparticles/administration & dosage , Antifungal Agents/adverse effects , Microbial Sensitivity Tests/instrumentation , Fungi
4.
Article in Chinese | WPRIM | ID: wpr-927887

ABSTRACT

Candida vertebral osteomyelitis,a rare but challenging clinical disease without specific clinical manifestations,is prone to delay in diagnosis,with potential risks of serious complications.Therefore,early diagnosis is the key to improving the cure rate of this disease.A case of invasive candida lumbar osteomyelitis after gastrointestinal surgery is reported in this paper.We analyzed the clinical characteristics of the patient and reviewed the relevant literature,aiming to improve the early diagnosis and treatment of this disease.


Subject(s)
Candida , Candidiasis/drug therapy , Humans , Lumbar Vertebrae , Osteomyelitis/drug therapy
5.
Medicina (B.Aires) ; 81(5): 780-785, oct. 2021. graf
Article in Spanish | LILACS | ID: biblio-1351051

ABSTRACT

Resumen Se realizó un estudio retrospectivo de las infecciones fúngicas atendidas en un centro de quemados de alta complejidad situado en Buenos Aires, entre 2011 y 2014, mediante el análisis de las histo rias clínicas (n = 36). Las edades de los pacientes estuvieron entre 18 y 87 años, y 23 (63.9%) fueron mujeres. La extensión de la superficie corporal afectada más prevalente varió entre 30 y 50% (p = 0.03), y entre 71% y 100% en pacientes de menor edad, relacionándose con intentos de femicidio. En el 69.4% la profundidad de la quemadura fue grado 4, y en el 50% de los casos se observaron lesiones por inhalación, con una alta mortali dad (p = 0.04). El Candida score resultó de 3 en el 77.7% de los casos. Se usaron vías centrales y ventilación mecánica. Todos los pacientes recibieron tratamiento antibiótico y en 33 (91.7%) antifúngicos. La escisión qui rúrgica de la quemadura se practicó en 33 (91.7%) y los autoinjertos de piel en 29 (80.6%). La infección fúngica se desarrolló en una media de 21.4 días del ingreso en UCI. Se estudiaron 52 muestras de levaduras que se aislaron de urocultivo (42.3%), hemocultivo (26.9%), biopsia cutánea (9.6%), punta de catéter (15.4%) y aspirado traqueal (5.8%). Por cultivo microbiológico y métodos moleculares se identificaron a Candida albicans (53.8%), C. tropicalis (23.1%), C. parapsilosis sensu stricto (13.5%), C. krusei (5.8%), C. glabrata (1.9%) y C. dubliniensis (1.9%). Las infecciones fúngicas representan severas complicaciones en quemados con factores de riesgo.


Abstract A retrospective analysis of fungal infections was carried out in a health-care burn center between 2011 and 2014 using the patients' medical records (n = 36). Patients ranged from 18 to 87 years of age, with 23 (63.9%) being women. The most prevalent widespread total body surface area affected (TBSA) was 30-50% (p = 0.03), and 71-100% in younger patients, mainly associated with femicide. Fourth degree burns were revealed in 69.4% of the patients while in 50%, inhalation injuries were observed to represent a higher mortality rate (p = 0.04). The Candida score was 3 in 77.7% of cases respectively. Central venous catheter and mechanical ventilation were used. All patients received antibiotic treatment and 91.7% antifungal treatment. Surgical excision of the burn was performed in 33 (91.7%) patients, and skin autografting in 29 (80.6%). The median of the fungal infection devel oped was 21.4 days after admission to the ICU. The specimens analyzed involved 52 yeast samples isolated from different cultures: urine (42.3%), blood (26.9%), skin biopsy (9.6%), catheter tip (15.4%) and tracheal aspirate (5.8%). The use of microbiological culture and molecular methods allowed for the identification of Candida albicans (53.8%), C. tropicalis (23.1%), C. parapsilosis sensu stricto (13.5%), C. krusei (5.8%), C. glabrata (1.9%) and C. dubliniensis (1.9%). Fungal infections observed in skin burns lead to severe complications in at-risk patients.


Subject(s)
Humans , Female , Candida , Mycoses/drug therapy , Retrospective Studies , Risk Factors , Antifungal Agents
6.
Bol. latinoam. Caribe plantas med. aromát ; 20(5): 536-557, sept. 2021. tab, ilus
Article in English | LILACS | ID: biblio-1369226

ABSTRACT

This study determined phytochemical composition, antifungal activity and toxicity in vitro and in vivo of Syzygium cumini leaves extract (Sc). Thus, was characterized by gas chromatography coupled to mass spectrometry and submitted to determination of Minimum Inhibitory (MIC) and Fungicidal concentrations (MFC) on reference and clinical strains of Candida spp. and by growth kinetics assays. Toxicity was verified using in vitro assays of hemolysis, osmotic fragility, oxidant and antioxidant activity in human erythrocytes and by in vivo acute systemic toxicity in Galleria mellonella larvae. Fourteen different compounds were identified in Sc, which showed antifungal activity (MIC between 31.25-125µg/mL) with fungistatic effect on Candida. At antifungal concentrations, it demonstrated low cytotoxicity, antioxidant activity and neglible in vivotoxicity. Thus, Sc demonstrated a promising antifungal potential, with low toxicity, indicating that this extract can be a safe and effective alternative antifungal agent.


Este estudio determinó la composición fitoquímica, la actividad antifúngica y la toxicidad in vitro e in vivo del extracto de hojas de Syzygium cumini (Sc). Así, se caracterizó mediante cromatografía de gases acoplada a espectrometría de masas y se sometió a determinación de Concentraciones Mínimas Inhibitorias (CMI) y Fungicidas (MFC) sobre cepas de referencia y clínicas de Candida spp. y mediante ensayos de cinética de crecimiento. La toxicidad se verificó mediante ensayos in vitro de hemólisis, fragilidad osmótica, actividad oxidante y antioxidante en eritrocitos humanos y por toxicidad sistémica aguda in vivo en larvas de Galleria mellonella. Se identificaron catorce compuestos diferentes en Sc, que mostraron actividad antifúngica (CMI entre 31.25-125 µg/mL) con efecto fungistático sobre Candida. En concentraciones antifúngicas, demostró baja citotoxicidad, actividad antioxidante y toxicidad in vivo insignificante. Por lo tanto, Sc demostró un potencial antifúngico prometedor, con baja toxicidad, lo que indica que este extracto puede ser un agente antifúngico alternativo seguro y eficaz.


Subject(s)
Humans , Plant Extracts/pharmacology , Plant Extracts/chemistry , Syzygium/chemistry , Antifungal Agents/pharmacology , Antifungal Agents/chemistry , Candida/drug effects , Plant Extracts/toxicity , Microbial Sensitivity Tests , Toxicity Tests , Plant Leaves/chemistry , Phenolic Compounds/analysis , Gas Chromatography-Mass Spectrometry , Antifungal Agents/toxicity , Antioxidants
7.
Medicina (Ribeirão Preto) ; 54(1)jul, 2021. fig.
Article in Portuguese | LILACS | ID: biblio-1353671

ABSTRACT

RESUMO: Introdução: O gênero Candida possui alta taxa de incidência no ser humano, sendo a espécie Candida albicans a mais isolada em infecções invasivas e superficiais. Porém, tem sido relatado um aumento considerável de espécies de Candidanão-albicans em infecções fúngicas. Os óleos essenciais, por serem voláteis, podem agir como sinais de comunicação química e arma de defesa. Objetivo: Avaliar a eficácia, in vitro, dos óleos essenciais de Syzygium aromaticum e Eu-calyptus globulus na inibição do crescimento de espécies de Candida não-albicans. Métodos: Para avaliação da atividade antifúngica de S. aromaticum e de E. globulus e do efeito dos seus óleos essenciais sobre a micromorfologia das espécies Candida krusei, Candida parapsilosis e Candida glabrata, foram empregadas, nesta ordem, a técnica de difusão em ágar e de microcultivo para leveduras. Resultados: Na técnica de difusão, o óleo essencial de S. aromaticum apresentou for-mação de halo de inibição para Candida krusei, Candida parapsilosis e Candida glabrata. O óleo de E. globulus, por sua vez, não apresentou crescimento de halos de inibição em nenhuma das concentrações testadas frente às três espécies de Candida não-albicans. Todavia, com o microcultivo, ambos os óleos essenciais se provaram, in vitro, eficazes antimi-crobianos tendo apresentado estruturas indicativas de atividade antifúngica na maior concentração dos óleos e diferentes graus de destruição celular nas demais concentrações. Conclusão: Nas condições deste estudo, concluiu-se que os pro-dutos avaliados exerceram atividade antifúngica contra cepas de Candida não-albicans, destacando-se o óleo essencial de S. aromaticum que apresentou atividade antimicrobiana em ambas as metodologias. (AU)


ABSTRACT: Introduction: The genus Candida possesses a high incidence of infection in humans, with the Candida albicans species being the most isolated in invasive and superficial infections. However, a considerable increase in non-albicans Candidaspecies has been reported in fungal infections. Essential oils, for being volatile, can act as chemical communication sig-nals and defense mechanisms. Objective: Evaluate the effectiveness, in vitro, of the essential oils of Syzygium aromati-cum and Eucalyptus globulus in inhibiting the growth of non-albicans Candida species. Methods: To evaluate the antifun-gal activity of S. aromaticum and E. globulus and the effect of their essential oils on the micromorphology of the species Candida krusei, Candida parapsilosis and Candida glabrata, in this order, the agar diffusion technique and microculture for yeasts. Results: In the diffusion technique, the essential oil of S. aromaticum presented an inhibition halo for Candida krusei, Candida parapsilosis, and Candida glabrata. E. globulus oil, on the other hand, did not show inhibition halo growth in any of the concentrations tested against the three non-albicans Candida species. However, in the microculture, both essential oils have proven to be effective antimicrobials having shown structures indicative of antifungal activity in the highest concentration and different degrees of cell destruction in the other concentrations. Conclusion: In the conditions of this study, it was concluded that the products evaluated exerted antifungal activity against non-albicans Candidastrains, highlighting the essential oil of S. aromaticum that showed antimicrobial activity in both methodologies. (AU)


Subject(s)
Candida , Syzygium , Candida glabrata , Defense Mechanisms , Eucalyptus , Mycoses , Antifungal Agents
8.
Rev. bras. anal. clin ; 53(2): 117-126, 20210630. ilus, tab
Article in Spanish | LILACS | ID: biblio-1348662

ABSTRACT

El brote mundial del SARS-CoV-2, descrito a partir del 2019, provocó la pandemia de COVID-19, originando un riesgo para la salud de las personas, una amenaza a la vida y una emergencia de salud pública internacional, que hasta Julio del 2021 no se ha logrado controlar. La coinfección en estos pacientes, por virus, bacterias y hongos, aumenta la dificultad de diagnóstico, tratamiento y pronóstico de la enfermedad. Es importante profundizar los conocimientos sobre el virus SARS-CoV-2 y las coinfecciones que podrían presentarse, en particular, en pacientes con COVID-19 que presentan micosis. El objetivo de esta revisión bibliográfica es, determinar la importancia de las micosis, como enfermedad oportunista, en pacientes con COVID-19. Se realizó una revisión bibliográfica sistemática, en la base de datos "PubMed-NCBI". Se utilizaron las palabras claves: "COVID-19", "SARS-CoV-2", "Coronavirus", "COVID-19 and coinfection", "Mycosis", "Aspergillus spp.", "Candida spp.", "COVID-19 and Aspergillus spp.", "COVID-19 and Candida spp.". Del análisis de la bibliografía, se concluye la importancia de las micosis respiratorias, originadas por diversos hongos en pacientes con COVID-19. Hay poca información del manejo de estas, siendo necesario fortalecer la investigación de la coinfección, para así, mejorar los flujogramas de sospecha clínica, contribuyendo a diagnósticos, tratamientos precisos y fomentar la prevención frente a esta pandemia.


The global outbreak of SARS-CoV-2, described as of 2019 whose expansion caused the COVID-19 pandemic, has created a risk to people's health, presenting itself as a threat to life and an international public health emergency, which to the date cannot be controlled. Coinfection in these patients, by viruses, bacteria and fungi, increases the difficulty of diagnosis, treatment and prognosis of the disease. It's important to deepen the knowledge about the SARS-CoV-2 virus and the co-infections that could occur, in particular, in patients with COVID-19 who present with mycosis. The objective of this bibliographic review is to determine the importance of mycosis, as an opportunistic disease, in patients affected by SARS-CoV-2. A systematic bibliographic review was carried out in the "PubMed-NCBI" database, using the keywords and / or headings: "COVID-19", "SARS-CoV-2", "Coronavirus", "COVID-19 and coinfection" ,"Mycosis", "Aspergillus spp.", "Candida spp." COVID-19 and Aspergillus spp.", "COVID-19 and Candida spp.". From the analysis of the literature, one can conclude the importance of respiratory mycoses, caused by various fungal pathogens in patients with COVID-19. The disease was described in 2019 and there is few a information on cases and their management, making it necessary to strengthen the investigation of coinfection in these patients, in order to improve the flow charts of clinical suspicion, contributing to diagnoses, accurate treatments and promoting prevention against to this pandemic.


Subject(s)
Aspergillus , Candida , Coinfection , SARS-CoV-2 , Immune Tolerance
9.
Braz. j. infect. dis ; 25(1): 101041, jan., 2021. tab, graf
Article in English | LILACS | ID: biblio-1249290

ABSTRACT

ABSTRACT Objectives: Candida spp. has been reported as one of the common agents of nosocomial bloodstream infections and is associated with a high mortality. Therefore, this study evaluated the clinical findings, local epidemiology, and microbiological aspects of candidemia in eight tertiary medical centers in the state of Parana, South of Brazil. Methods: In this study, we reported 100 episodes of candidemia in patients admitted to eight different hospitals in five cities of the state of Parana, Brazil, using data collected locally (2016 and 2017) and tabulated online. Results: The incidence was found to be 2.7 / 1000 patients / day and 1.2 / 1000 admissions. C. albicans was responsible for 49% of all candidemia episodes. Cancer and surgery were the two most common underlying conditions associated with candidemia. The mortality rate within 30 days was 48%, and removal of the central venous catheter (p = 0.029) as well as empirical or prophylactic exposure to antifungals were both related to improved survival (p = 0.033). Conclusions: This study highlights the high burden and mortality rates of candidemia in hospitals from Parana as well as the need to enhance antifungal stewardship program in the enrolled medical centers.


Subject(s)
Humans , Cross Infection/drug therapy , Cross Infection/epidemiology , Incidence , Candidemia/drug therapy , Candidemia/epidemiology , Brazil/epidemiology , Candida , Antifungal Agents/therapeutic use
10.
Braz. j. med. biol. res ; 54(9): e10928, 2021. graf
Article in English | LILACS | ID: biblio-1278587

ABSTRACT

This study aimed to evaluate the frequency of cryptic Candida species from candidemia cases in 22 public hospitals in São Paulo State, Brazil, and their antifungal susceptibility profiles. During 2017 and 2018, 144 isolates were molecularly identified as 14 species; C. parapsilosis (32.6%), C. albicans (27.7%), C. tropicalis (14.6%), C. glabrata (9.7%), C. krusei (2.8%), C. orthopsilosis (2.8%), C. haemulonii var. vulnera (2.1%), C. haemulonii (1.4%), C. metapsilosis (1.4%), C. dubliniensis (1.4%), C. guilliermondii (1.4%), C. duobushaemulonii (0.7%), C. kefyr (0.7%), and C. pelliculosa (0.7%). Poor susceptibility to fluconazole was identified in 6.4% of C. parapsilosis isolates (0.12 to >64 µg/mL), 50% of C. guilliermondii (64 µg/mL), 66.6% of C. haemulonii var. vulnera (16-32 µg/mL), and C. duobushaemulonii strain (MIC 64 µg/mL). Our results corroborated the emergence of C. glabrata in Brazilian cases of candidemia as previously reported. Importantly, we observed a large proportion of non-wild type C. glabrata isolates to voriconazole (28.6%; <0.015 to 4 µg/mL) all of which were also resistant to fluconazole (28.6%). Of note, C. haemulonii, a multidrug resistant species, has emerged in the Southeast region of Brazil. Our findings suggested a possible epidemiologic change in the region with an increase in fluconazole-resistant species causing candidemia. We stress the relevance of routine accurate identification to properly manage therapy and monitor epidemiologic trends.


Subject(s)
Candida , Antifungal Agents/pharmacology , Brazil , Microbial Sensitivity Tests , Drug Resistance, Fungal , Hospitals
11.
Rev. méd. Minas Gerais ; 31: 31105, 2021.
Article in Portuguese | LILACS | ID: biblio-1291252

ABSTRACT

Introdução: A cesárea é realizada em condições maternas e/ou fetais que impeçam o nascimento via vaginal. Devido ao risco de complicações infecciosas, o procedimento é precedido de antibioticoprofilaxia, o que pode provocar a seleção de cepas multirresistentes e alterar a flora nativa do indivíduo. O colostro é um fator determinante para a colonização do trato digestivo por ser fonte probiótica, além de apresentar papel importante na modulação do sistema imunológico e desenvolvimento do neonato. Objetivo: Este estudo visa avaliar possíveis interferências da antibioticoprofilaxia realizada previamente à cesárea na flora materna. Métodos: Selecionou-se 140 lactantes após aplicação dos critérios de exclusão, divididas em grupos estudo (realizaram parto cesáreo com antibioticoprofilaxia) e controle (realizaram parto vaginal sem antibioticoprofilaxia) para coleta das amostras ­ colostro e esfregaço areolar ­ com intuito de realizar a análise microbiológica das mesmas no Laboratório de Microbiologia da Faculdade de Medicina de Barbacena. Resultados: 94 lactantes pertencem ao grupo estudo e 46 ao controle. O microrganismo mais prevalente em todas as amostras foi a Candida sp. Ao se discriminar os grupos, a mesma também apresentou maior prevalência, seguida de Enterococcus sp. Em relação à detecção de Staphylococcus aureus pelo esfregaço mamilar, ele foi encontrado em 24 amostras do grupo controle e em 34 do grupo estudo. Na análise comparativa da prevalência de microrganismos entre os grupos, não se observou diferença estatisticamente relevante. Conclusão: A antibioticoprofilaxia peri-operatória mostrou-se segura em não alterar a composição da flora materna. Entretanto, mais estudos sobre o tema devem ser realizados.


Introduction: The C-section is performed under maternal and / or fetal conditions that prevent vaginal birth. Because of the infectious complications, the procedure is preceded by antibiotic prophylaxis, which can cause the selection of multidrug-resistant strains and shift the individual's native flora. Colostrum is a determining factor for colonization of the digestive tract being a probiotic source, along with playing an important role in the modulation of the immune system and development of the newborn. Objective: This study aims to assess possible interferences of antibiotic prophylaxis performed prior to cesarean section on maternal flora. Methods: 140 lactating women were selected after applying the exclusion criteria, divided into study groups (94 lactating women who underwent cesarean delivery with antibiotic prophylaxis) and control groups (46 lactating women who underwent vaginal delivery without antibiotic prophylaxis) for sample collection - colostrum and areolar swab - therefore perform the microbiological analysis at the Laboratório de Microbiologia da Faculdade de Medicina de Barbacena. Results: The most prevalent microorganism in all samples was Candida sp. Discriminating the groups, it also had the highest prevalence, followed by Enterococcus sp. Regarding the detection of Staphylococcus aureus by the areolar swab, it was found in 24 samples from the control group and 34 from the study group. In the comparative analysis of prevalence of microorganisms, between the groups, there was no statistically significant difference. Conclusion: Perioperative antibiotic prophylaxis proved to be safe not changing the composition of the maternal flora. However, further studies on the subject should be carried out.


Subject(s)
Humans , Pregnancy , Microbiological Techniques , Colostrum , Infant , Staphylococcus aureus , Candida , Cesarean Section , Flora , Antibiotic Prophylaxis , Parturition , Postpartum Period , Enterobacteriaceae , Gastrointestinal Microbiome
12.
Rev. Asoc. Colomb. Cien. Biol. (En línea) ; 2(33): 75-82, 2021. graf, ilus, tab
Article in English | LILACS, COLNAL | ID: biblio-1379300

ABSTRACT

Introducción: Alternaria spp y Candida spp. son hongos patógenos de ambientes interiores como la casa, la oficina, el aula, etc., causan enfermedades como asma crónica e infecciones sistémicas en individuos inmunodeprimidos a través de la secreción de diversas sustancias tóxicas. Los ambientadores a base de productos químicos disponibles comercialmente que se utilizan para controlar la carga de hongos en el ambiente interior no son beneficiosos para la salud humana. Objetivo: proporcionar una alternativa viable en forma de enfoque basado en nanopartículas para el manejo de hongos transmitidos por el aire. Metodología: aislamiento, identificación microscópica y bioquímica de hongos de interior; Síntesis de nanopartículas de azufre (SNP) mediadas por Azadirachta indica, su detección y caracterización; y evaluación in vitro de SNP contra hongos aislados presentes en el ambiente interior. Resultado: Los hongos aislados se identificaron como especies de Alternaria spp y Candida spp. Los SNP mostraron máximos de absorbancia a 291 nm. El análisis NTA mostró un tamaño medio de 188,4 nm y un potencial zeta de -4,94 mV, lo que representa una síntesis de SNP estables. El patrón XRD confirmó la naturaleza cristalina cúbica centrada en la cara de los SNP. El espectro FTIR representó la presencia de compuestos polihidroxilo, nitrilo, ceto, aromáticos y carboxílicos que estabilizaron los SNP. Los ensayos antifúngicos demostraron la actividad significativa de los SNP formulados y del ambientador infundido con aceite de eucalipto. Conclusión: Los SNP mediados por A. indica se pueden aplicar en la formulación y fabricación de un ambientador ecológico para el manejo de hongos patógenos de interior como Alternaria spp y Candida spp.


Introduction: Alternaria spp. and Candida spp. are the main fungal pathogen of indoor environment like house, office, classroom, etc. These may cause various diseases and infections like systemic infections, or chronic asthma in immunocompromised individuals through secretion of various toxic substances. Chemical-based commercially available room fresheners used to control the fungal load of indoor environment are not beneficial to human health. Objective: was to provide viable alternative in the form of nanoparticle-based approach for the management of air-borne fungi. Methodology: The present study primarily focuses on the isolation, microscopic and biochemical identification of indoor fungi; Azadirachta indica-mediated sulphur nanoparticles (SNPs) synthesis, their detection and characterization; and in vitro assessment of SNPs against isolated fungi present in indoor environment. Result: The isolated fungi were identified as Alternaria spp and Candida spp. The SNPs showed absorbance maxima at 291 nm. NTA analysis showed average size of 188.4 nm, and zeta potential of -4.94 mV which represented synthesis of stable SNPs. XRD pattern confirmed the face centered cubic, crystalline nature of SNPs. FTIR spectrum depicted the presence of polyhydroxyl, nitrile, keto, aromatic and carboxylic compounds which stabilized the SNPs. The antifungal assays demonstrated the significant activity of the formulated SNPs and eucalyptus oil infused air freshener. Conclusion: It can be concluded that A. indica-mediated SNPs can be applied in the formulation and manufacture of an ecofriendly air freshener for the management of indoor fungal pathogens like Alternaria spp. and Candida spp.


Subject(s)
Nanoparticles , Antifungal Agents , Candida , Alternaria
13.
Article in English | WPRIM | ID: wpr-888786

ABSTRACT

Candida is an intractable life-threatening pathogen. Candida infection is extremely difficult to eradicate, and thus is the major cause of morbidity and mortality in immunocompromised individuals. Morevover, the rapid spread of drug-resistant fungi has led to significant decreases in the therapeutic effects of clinical drugs. New anti-Candida agents are urgently needed to solve the complicated medical problem. Natural products with intricate structures have attracted great attention of researchers who make every endeavor to discover leading compounds for antifungal agents. Their novel mechanisms and diverse modes of action expand the variety of fungistatic agents and reduce the emergence of drug resistance. In recent decades, considerable effort has been devoted to finding unique antifungal agents from nature and revealing their unusual mechanisms, which results in important progress on the development of new antifungals, such as the novel cell wall inhibitors YW3548 and SCY-078 which are being tested in clinical trials. This review will present a brief summary on the landscape of anti-Candida natural products within the last decade. We will also discuss in-depth the research progress on diverse natural fungistatic agents along with their novel mechanisms.


Subject(s)
Antifungal Agents/pharmacology , Biological Products/pharmacology , Candida/drug effects , Candidiasis/drug therapy , Humans , Microbial Sensitivity Tests
14.
Chinese Journal of Biotechnology ; (12): 2753-2764, 2021.
Article in Chinese | WPRIM | ID: wpr-887838

ABSTRACT

Biodiesel is an alternative fuel to addressing the energy shortage problem. Microbial lipids have attracted widespread attention as one of the potential feed-stocks for cost-effective and efficient biodiesel production. However, the large-scale production of microbial lipids is hampered by the complexity and the high cost of aseptic culturing approach. Metschnikowia pulcherrima is an oleaginous yeast with strong environmental adaptability. It is capable of utilizing a wide spectrum of substrates, and can be cultured under non-sterile conditions. Therefore, this yeast has great potential to replace the traditional oleaginous microorganisms, particularly in the area of recycling wastewater and solid waste for the production of biodiesel. Based on the analysis of lipid production and application conditions of M. pulcherrima, this review summarized the unique advantages of M. pulcherrima and the key factors affecting lipids production. We further discussed the feasibility of cultivating M. pulcherrima on various organic wastes under non-sterile conditions for lipids production. Moreover, we analyzed the challenges associated with M. pulcherrima's in the yield and mechanism for lipids production, and proposed perspectives for how to achieve efficient biodiesel production using this yeast.


Subject(s)
Biofuels , Candida , Lipids , Metschnikowia , Yeasts
15.
J. appl. oral sci ; 29: e20210024, 2021. tab, graf
Article in English | LILACS | ID: biblio-1340097

ABSTRACT

Abstract Understanding the behavior of Candida spp. when exposed to denture disinfectants is essential to optimize their effectiveness. Changes in the virulence factors may cause increased resistance of Candida spp. to disinfectant agents. Objective To evaluate the microbial load, cellular metabolism, hydrolytic enzyme production, hyphae formation, live cell and biofilm quantification of Candida albicans, Candida tropicalis and Candida glabrata after exposure to disinfectant solutions. Methodology Simple biofilms were grown on heat-polymerized acrylic resin specimens, and divided into groups according to solutions/strains: distilled water (control); 0.25% sodium hypochlorite (NaOCl 0.25% ); 10% Ricinus communis (RC 10%); and 0.5% Chloramine T (CT 0.5%). The virulence factors were evaluated using the CFU count (microbial load), XTT method (cell metabolism), epifluorescence microscopy (biofilm removal and live or dead cells adhered), protease and phospholipase production and hyphae formation. Data were analyzed (α=0.05) by one-way ANOVA/ Tukey post hoc test, Kruskal-Wallis test and Wilcoxon test. Results NaOCl 0.25% was the most effective solution. CT 0.5% reduced the number of CFUs more than RC 10% and the control. RC 10% was effective only against C. glabrata. RC 10% and CT 0.5% decreased the cellular metabolism of C. albicans and C. glabrata. Enzyme production was not affected. Hyphal growth in the RC 10% and CT 0.5% groups was similar to that of the control. CT 0.5% was better than RC 10% against C. albicans and C. tropicalis when measuring the total amount of biofilm and number of living cells. For C. glabrata, CT 0.5% was equal to RC 10% in the maintenance of living cells; RC 10% was superior for biofilm removal. Conclusions The CT 0.5% achieved better results than those of Ricinus communis at 10%, favoring the creation of specific products for dentures. Adjustments in the formulations of RC 10% are necessary due to efficacy against C. glabrata. The NaOCl 0.25% is the most effective and could be suitable for use as a positive control.


Subject(s)
Candida , Disinfectants , Acrylic Resins , Candida albicans , Biofilms , Virulence Factors
16.
Vive (El Alto) ; 3(9): 227-246, dic. 2020. ilus
Article in Spanish | LILACS | ID: biblio-1252340

ABSTRACT

INTRODUCCIÓN: las infecciones fúngicas ocasionadas por levaduras del género Cándida son extremadamente comunes en mujeres de edad reproductiva, y constituyen un motivo de atención medica de salud. OBJETIVO: evaluar la susceptibilidad de Cándidas spp, mediante el método colorimétrico (Integral Yeast System Plus). MÉTODO: fue de tipo descriptivo, transversal; se recopiló información mediante observación directa en campo y el análisis documental para obtener información bibliográfica de tipo secundaria. RESULTADOS: de los 72 casos encontrados de Cándida Albicans revela que son susceptibles a la anfotericina B (2ug/ml); de los 5 casos encontrados de Cándida Krusei revela que son sensibles a la Anfotericina B (2ug/ml); De 1 caso encontrado de Cándida Parapsilosis revela sensibilidad en la Nistatina (1.25ug/ml). En este estudio la prevalencia de la infección por Cándida fue del (44.98%). CONCLUSIONES: Cándida Albicans fue la especie más común aislada en las mujeres embarazadas representando un 72%, En la evaluación de la susceptibilidad a través del kit Integral System Yeast Plus se obtuvo que Cándida Albicans es susceptible a Anfotericina B, Flucitosina entre otros, en Cándida Glabrata se obtuvo que es sensible a la Nistatina, Anfotericina B, susceptible entre otros, en Cándida Krusei se obtuvo que es sensible a la Anfotericina B, Clotrimazol, Miconazol, susceptibles a la Nistatina, Voriconazol y resistente a la Flucitosina, Ketoconazol, Itraconazol y Fluconazol.


INTRODUCTION: fungal infections caused by yeast of the genus Candida are extremely common in women of reproductive age, and constitute a reason for medical health care. OBJECTIVE: to evaluate the susceptibility of Candida spp, using the colorimetric method (Integral Yeast System Plus). METHOD: it was descriptive, transversal; Information was collected through direct observation in the field and documentary analysis to obtain secondary bibliographic information. RESULTS: of the 72 cases found, Candida Albicans reveals that they are susceptible to amphotericin B (2ug / ml); of the 5 cases found, Candida Krusei reveals that they are sensitive to Amphotericin B (2ug / ml); Of 1 case found of Candida Parapsilosis reveals sensitivity in Nystatin (1.25ug / ml). In this study, the prevalence of Candida infection was (44.98%). CONCLUSIONS: Candida Albicans was the most common species isolated in pregnant women, representing 72%. In the evaluation of susceptibility through the Integral System Yeast Plus kit it was obtained that Candida Albicans is susceptible to Amphotericin B, Flucytosine among others, in Candida Glabrata was obtained that it is sensitive to Nystatin, Amphotericin B, susceptible among others, in Candida Krusei it was obtained that it is sensitive to Amphotericin B, Clotrimazole, Miconazole, susceptible to Nystatin, Voriconazole and resistant to Flucytosin, Ketoconazole, Itraconazole and Fluconazole.


INTRODUÇÃO: as infecções fúngicas causadas por leveduras do gênero Candida são extremamente comuns em mulheres em idade reprodutiva e constituem motivo de cuidados médicos. OBJETIVO: avaliar a suscetibilidade de Candida spp, por meio do método colorimétrico (Integral Yeast System Plus). MÉTODO: foi descritivo, transversal; as informações foram coletadas por meio de observação direta em campo e análise documental para obtenção de informações bibliográficas secundárias. RESULTADOS: Dos 72 casos encontrados, Cândida Albicans revelou ser suscetíveis à anfotericina B (2ug /ml); dos 5 casos encontrados, Candida Krusei revela que são sensíveis à Anfotericina B (2ug / ml); de 1 caso encontrado de Candida Parapsilosis revela sensibilidade na Nistatina (1,25ug / ml). Neste estudo, a prevalência de infecção por Candida foi (44,98%). CONCLUSÕES: Cândida Albicans foi a espécie mais comum isolada em gestantes, representando 72%. Na avaliação da susceptibilidade através do kit Integral System Yeast Plus foi obtido que Candida Albicans é suscetível à Anfotericina B, Flucitosina entre outras, em Cândida Glabrata foi obtido que é sensível a Nistatina, Anfotericina B, suscetível entre outras, em Candida Krusei foi obtido que é sensível a Anfotericina B, Clotrimazol, Miconazol, suscetível a Nistatina, Voriconazol e resistente a Flucitosina, Cetoconazol, Itraconazol e Fluconazol.


Subject(s)
Humans , Female , Pregnancy , Adult , Candida , Candida albicans , Amphotericin B , Colorimetry , Candida glabrata , Pregnant Women , Fluconazole , Prevalence , Clotrimazole , Itraconazole , Voriconazole , Flucytosine , Candida parapsilosis , Infections , Miconazole
17.
Infectio ; 24(4): 266-269, oct.-dic. 2020. tab, graf
Article in Spanish | LILACS, COLNAL | ID: biblio-1114881

ABSTRACT

Resumen Introducción: La endocarditis fúngica es una enfermedad infecciosa agresiva e infrecuente, considerada una emergencia en los servicios hospitalarios. Se ha evidenciado una incidencia de 0-12% del total de las admisiones pediátricas por endocarditis infecciosa. La mortalidad por Candida spp se encuentra alrededor del 50-80% en todos los casos. La Candida lusitaniae afecta principalmente a pacientes inmunocomprometidos, con uso de dispositivos intravasculares y el empleo de antibióticos de amplio espectro. Reporte de caso: Se presenta el caso de un lactante menor quien es diagnosticado con fungemia y endocarditis infecciosa por Candida lusitaniae en válvula nativa posterior a cirugía de corrección por transposición de grandes vasos. Discusión y Conclusiones: La endocarditis infecciosa por Candida lusitaniae es una entidad poco frecuente, con una prevalencia menor al 2% constituyéndose un escenario desafiante en la práctica clínica. Se describen las características de un lactante menor quien presentó endocarditis fúngica ya definidas en la literatura mundial. Es imprescindible la detección temprana y una intervención terapéutica vertiginosa; puesto que, la persistencia del inoculo, la resistencia antimicótica y el retraso en el diagnóstico conllevan a una condición amenazante para la vida del paciente.


Abstract Introduction: Fungal infective endocarditis is an aggressive and infrequent disease, considered an emergency in hospital services. Candida mortality is around 50-80% in all cases. The Candida lusitaniae mainly affects immunocompromised patients with chronic venous access and the use of broad-spectrum antibiotics. Case report: A minor infant is presented who is diagnosed with fungemia and infective endocarditis due to Candida lusitaniae in a native valve secondary to surgery by transposition of large vessels. Discussion and Conclusions: Candida lusitaniae infectious endocarditis is very rare, with a prevalence of less than 2% constituting a challenging scenario in clinical practice. The characteristics of fungemia and endocarditis already defined in the world literature are described. Early detection and a vertiginous therapeutic intervention are essential, since; latent infection, antifungal resistance and delay in diagnosis lead to a threatening condition for the patient's life.


Subject(s)
Humans , Infant , Candida , Endocarditis , Fungemia , Echinocandins , Infections/complications , Anti-Bacterial Agents
18.
Infectio ; 24(4): 224-228, oct.-dic. 2020. tab, graf
Article in Spanish | LILACS, COLNAL | ID: biblio-1114873

ABSTRACT

Resumen Objetivo: Comparar los resultados obtenidos de diferentes sistemas de identificación de C. auris. Métodos: Análisis descriptivo con datos recopilados durante 2016-19 mediante la vigilancia nacional. Se evaluaron los resultados generados por los sistemas MicroScan, Phoenix BD, VITEK 2 y MALDI-TOF MS de instituciones hospitalarias de 843 aislamientos clínicos sospechosos de C. auris remitidos al INS y se compararon con los resultados generados de confirmación a través de MALDI- TOF MS (Bruker Daltonics) o PCR. Resultados: De los 843 aislamientos clínicos remitidos al INS, el 81,7% fueron confirmados como C. auris mediante MALDI- TOF MS o PCR en el INS y el resto, 18,3%, fueron identificados como otras especies de Candida spp. Las identificaciones correctas enviadas por los laboratorios representaron el 42,4%. MicroScan identificó C. auris principalmente como C. haemulonii, C. guilliermondii, C. albicans y C. famata; Phoenix BD, VITEK 2 y MALDI-TOF MS identificó C. auris como C. haemulonii. Discusión: Estudios señalan que C. auris exhibe una estrecha relación filogenética con C. haemulonii. Las identificaciones discrepantes pueden darse debido a que las bases de datos de los sistemas de diagnóstico son limitadas para este patógeno. Las deficiencias de los sistemas comerciales para la identificación de C. auris deben ser complementados con otros sistemas como MALDI-TOF MS o pruebas moleculares.


Abstract Objective: To compare the identification results obtained by different identification systems of C. auris isolates. Methods: A descriptive study with data collected during the years 2016-19 through surveillance. The results generated by the MicroScan, Phoenix BD, VITEK 2 and MALDI-TOF MS systems of 843 clinical isolates of C. auris submitted to the INS were evaluated and compared with the results generated from confirmation through MALDI-TOF MS (Bruker Daltonics) or PCR. Results: Out of 843 clinical isolates submitted to the INS, 81.7% were confirmed as C. auris by MALDITOF MS or PCR in the INS and the rest, 18.3%, were identified as other species of Candida spp. The correct identifications sent by the laboratories was 42.4%. MicroScan identified C. auris as C. haemulonii, C. guilliermondii, C. albicans and C. famata; Phoenix BD, VITEK 2 and MALDI-TOF MS identified C. auris as C. haemulonii. Discussion: Studies indicate that C. auris exhibits a close phylogenetic relationship with C. haemulonii. In addition, discrepant identifications may occur because the databases of diagnostic systems are limited with reference to this pathogen. The deficiencies of commercial systems for the identification of C. auris must be complemented with other systems such as MALDI-TOF MS or molecular tests.


Subject(s)
Humans , Female , Candida , Surveillance in Disasters , Diagnosis , Laboratories , Polymerase Chain Reaction , Epidemiology, Descriptive , Colombia , Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization , Molecular Diagnostic Techniques , Alkalies
19.
Infectio ; 24(4): 217-223, oct.-dic. 2020. tab, graf
Article in Spanish | LILACS, COLNAL | ID: biblio-1114872

ABSTRACT

Resumen Candida spp. es un agente etiológico importante en infecciones del tracto urinario, principalmente en población con terapia antimicótica de amplio espectro y con catéteres urinarios. Candida albicans es la especie más frecuente, pero otras especies han surgido como patógenos emergentes. En este trabajo se recolectaron aislamientos de Candida spp. de urocultivos de pacientes que consultaron en Dinamica IPS entre enero 2016 y noviembre 2017. Para estimar la frecuencia de las especies y observar los patrones de sensibilidad, se realizó la identificación fenotípica y su perfil de sensibilidad con el sistema comercial Vitek 2® (BioMérieux, Inc.), adicionalmente se evaluaron mediante análisis de las secuencia y filogenética ITS1-5.8S-ITS2. En el estudio se incluyeron 78 aislamientos de Candida spp. Las frecuencias de especies de Candida identificadas empleando las herramientas moleculares fueron: C. albicans (38,5%), C. tropicalis (23,1%), C. glabrata (21,8%), C. parapsilosis (10,3%), C. metapsilosis y C. krusei (2,5%) y C. guillermondi (1,3%). La identificación por métodos moleculares y por el sistema Vitek 2 fue: C. albicans (93,3%), C. glabrata (94,1%), C. tropicalis (83,3%), C. parapsilosis (75%) C. guilliermondii y C. krusei (100%). La sensibilidad de todos los aislamientos al fluconazol fue 93,6%.


Abstract Candida spp is an important etiologic agent in urinary tract infections, mainly in patients in broad-spectrum antifungal therapy, with urinary catheters. Candida albicans is the most frequent specie; but other species have arised as emerging pathogens. In this study, isolates of Candida spp. of urine cultures from patients who consulted in Dinamica IPS between January 2016 and November 2017 were evaluated. To estimate the frequency of the species and to observe the sensitivity patterns, the phenotypic identification and its sensitivity profile was performed employed the Vitek 2® commercial system. (BioMérieux, Inc) In addition the isolates were evaluated by sequence analysis and phylogenetics ITS1-5.8S-ITS2. This study included 78 isolates of Candida spp. The frequencies of Candida species identified using the molecular tools were: C. albicans (38.5%), C. tropicalis (23.1%), C. glabrata (21.8%), C. parapsilosis (10.3%), C. guillermondi (1.3%) and C. metapsilosis and C. krusei (2.5%). The identification by molecular methods and by Vitek 2 system were: C. albicans (93.3%), for C. glabrata (94.1%), C. tropicalis (83.3%), C. parapsilosis (75%) and 100% for C. guilliermondii and C. krusei.. fluconazole sensitivity of all isolates was 93.6%


Subject(s)
Humans , Male , Female , Child , Adolescent , Adult , Middle Aged , Aged , Candida , Diagnostic Techniques, Urological , Candida parapsilosis , Laboratories , Urinary Tract , Urinary Tract Infections , Candida albicans , Fluconazole , Sequence Analysis , Urinary Catheters , Infections
20.
San Salvador; MINSAL; oxt. 23, 2020. 18 p. ilus.
Non-conventional in Spanish | LILACS, BISSAL | ID: biblio-1129230

ABSTRACT

Ante el riesgo potencial de casos por este hongo en pacientes que consultan en el Sistema Nacional Integrado de Salud, se elaboran los presentes lineamientos para el control y diagnóstico de infecciones por C. auris, contándose con la colaboración técnica de expertos internacionales del Centro para el Control y Prevención de Enfermedades de los Estados Unidos de América (CDC), de la Secretaría Ejecutiva del Consejo de Ministros de Salud de Centroamérica y República Dominicana (SE-COMISCA) y de un panel de expertos nacionales


Given the potential risk of cases due to this fungus in patients who consult in the National Integrated Health System, these guidelines are prepared for the control and diagnosis of C. auris infections, with the technical collaboration of international experts from the Center for the Disease Control and Prevention of the United States of America (CDC), the Executive Secretariat of the Council of Ministers of Health of Central America and the Dominican Republic (SE-COMISCA) and a panel of national experts


Subject(s)
Candida , Diagnosis , Fungi
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