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1.
Article in English | WPRIM | ID: wpr-921330

ABSTRACT

Objective@#This study aimed to evaluate the epidemiological, clinical and mycological characteristics of invasive candidiasis (IC) in China.@*Methods@#A ten-year retrospective study including 183 IC episodes was conducted in a tertiary hospital in Beijing, China.@*Results@#The overall incidence of IC from 2010-2019 was 0.261 episodes per 1,000 discharges. Candidemia (71.0%) was the major infective pattern; 70.3% of the patients tested positive for @*Conclusion@#The incidence of IC has declined in the recent five years.


Subject(s)
Adolescent , Adult , Aged , Aged, 80 and over , Antifungal Agents/pharmacology , Candidiasis, Invasive/microbiology , Child , Child, Preschool , China/epidemiology , Drug Resistance, Fungal , Female , Humans , Infant , Infant, Newborn , Male , Middle Aged , Retrospective Studies , Tertiary Care Centers/statistics & numerical data , Young Adult
2.
Braz. j. biol ; 78(4): 742-749, Nov. 2018. tab, graf
Article in English | LILACS | ID: biblio-951595

ABSTRACT

Abstract Although invasive infections and mortality caused by Candida species are increasing among compromised patients, resistance to common antifungal agents is also an increasing problem. We analyzed 60 yeasts isolated from patients with invasive candidiasis using a PCR/RFLP strategy based on the internal transcribed spacer (ITS2) region to identify different Candida pathogenic species. PCR analysis was performed from genomic DNA with a primer pair of the ITS2-5.8S rDNA region. PCR-positive samples were characterized by RFLP. Restriction resulted in 23 isolates identified as C. albicans using AlwI, 24 isolates as C. parapsilosis using RsaI, and 13 as C. tropicalis using XmaI. Then, a group of all isolates were evaluated for their susceptibility to a panel of previously described killer yeasts, resulting in 75% being susceptible to at least one killer yeast while the remaining were not inhibited by any strain. C. albicans was the most susceptible group while C. tropicalis had the fewest inhibitions. No species-specific pattern of inhibition was obtained with this panel of killer yeasts. Metschnikowia pulcherrima, Pichia kluyveri and Wickerhamomyces anomalus were the strains that inhibited the most isolates of Candida spp.


Resumo Embora as infecções invasivas e a mortalidade causada por espécies de Candida estejam aumentando entre pacientes comprometidos, a resistência a agentes antifúngicos comuns também é um problema crescente. Analisamos 60 leveduras isoladas de pacientes com candidíase invasiva utilizando como estratégia PCR/RFLP baseada na região espaçadora transcrita interna (ITS2) para identificar diferentes espécies patogênicas de Candida. A análise por PCR foi realizada a partir de ADN genómico com um par de iniciadores da região ITS2-5.8S rDNA. As amostras PCR-positivas foram caracterizadas por RFLP. A restrição resultou em 23 isolados identificados como C. albicans usando AlwI, 24 isolados como C. parapsilosis usando RsaI e 13 como C. tropicalis usando XmaI. Em seguida, avaliou-se o grupo de todos os isolados quanto à sua susceptibilidade a um painel de leveduras killer previamente descritas, resultando em 75% sendo suscetíveis a pelo menos uma levedura killer, enquanto que as restantes não foram inibidas por qualquer cepa. C. albicans foi o grupo mais suscetível enquanto C. tropicalis teve o menor número de inibições. Não se obteve um padrão de inibição específico da espécie com este painel de leveduras killer. Metschnikowia pulcherrima, Pichia kluyveri e Wickerhamomyces anomalus foram as cepas que inibiram a maioria dos isolados de Candida spp.


Subject(s)
Humans , Adult , Candida/drug effects , Candidiasis, Invasive/drug therapy , Antifungal Agents/pharmacology , Polymorphism, Restriction Fragment Length , Candida/genetics , Microbial Sensitivity Tests/methods , Polymerase Chain Reaction/methods , Candidiasis, Invasive/microbiology
3.
Mem. Inst. Oswaldo Cruz ; 111(7): 417-422, tab, graf
Article in English | LILACS | ID: lil-787553

ABSTRACT

Yeasts of the genus Candida have high genetic variability and are the most common opportunistic pathogenic fungi in humans. In this study, we evaluated the genetic diversity among 120 isolates of Candida spp. obtained from diabetic patients, kidney transplant recipients and patients without any immune deficiencies from Paraná state, Brazil. The analysis was performed using the ITS1-5.8S-ITS2 region and a partial sequence of 28S rDNA. In the phylogenetic analysis, we observed a consistent separation of the species C. albicans, C. dubliniensis, C. glabrata, C. tropicalis, C. parapsilosis, C. metapsilosis and C. orthopsilosis, however with low intraspecific variability. In the analysis of the C. albicans species, two clades were formed. Clade A included the largest number of isolates (91.2%) and the majority of isolates from GenBank (71.4%). The phylogenetic analysis showed low intraspecific genetic diversity, and the genetic polymorphisms between C. albicans isolates were similar to genetic divergence found in other studies performed with isolates from Brazil. This low genetic diversity of isolates can be explained by the geographic proximity of the patients evaluated. It was observed that yeast colonisation was highest in renal transplant recipients and diabetic patients and that C. albicans was the species most frequently isolated.


Subject(s)
Humans , Male , Female , Candida/genetics , Candidiasis, Invasive/genetics , Diabetes Mellitus/microbiology , Genetic Variation , Kidney Transplantation , Brazil/epidemiology , Candida/classification , Candida/isolation & purification , Candidiasis, Invasive/classification , Candidiasis, Invasive/epidemiology , Candidiasis, Invasive/microbiology , Case-Control Studies , Diabetes Complications , DNA, Fungal/analysis , DNA, Ribosomal/genetics , Microbial Sensitivity Tests
4.
Rev. chil. infectol ; 28(2): 118-122, abr. 2011. tab
Article in Spanish | LILACS | ID: lil-592093

ABSTRACT

Invasive candidiasis (IC) epidemiology has changed in critically ill patients and limited data are available in Chile. Objective: To describe the epidemiological and microbiological profile of IC in critically ill patients. Methods: Observational prospective study conducted from October 2001 to August 2003 in critically ill adults with suspected or confirmed IC. Results: 53 patients met criteria for IC, finding 18 (33.9 percent) candidemias, 22 (41.5 percent) disseminated IC, and 13 (24.5 percent) local IC. We identified 8 (44.4 percent) C. albicans and 10 (55.6 percent) non-albicans Candida in candidemias. C. tropicalis was the predominant non-albicans species (27.7 percent). An 88.8 percent of Candidas sp recovered in candidemias were fluconazole susceptible. Overall hospital mortality was 24.5 percent. Mortality in candidemia was significantly lower than in disseminated IC (16.6 vs 31.8 percent, p = 0.02). Conclusions: A higher proportion of non-albicans Candida was observed in candidemias from critically ill patients. However, most of these strains were fluconazole susceptible. A lower overall mortality was observed in candidemias.


La epidemiología de candidiasis invasora (CI) ha cambiado, lo cual no ha sido suficientemente estudiado en Chile. Objetivo: Describir el perfil epidemiológico y microbiológico de CI en pacientes críticos. Métodos: Estudio observacional prospectivo entre octubre 2001 y agosto 2003, en pacientes críticos adultos con sospecha o confimnación de CI. Resultados: 53 pacientes cumplieron criterios de CI. De ellos, 18 (33,9 por ciento) tuvieron candidemia, 22(41,5 por ciento) CI diseminada y 13(24,5 por ciento) CI local. Entre las candidemias, hubo 8 C. albicans (44,4 por ciento) y 10 Candida no albicans (55,6 por ciento), predominando C. tropicalis (27,7 por ciento). Un 88,8 por ciento de las candidemias fueron susceptibles a fluconazol. La mortalidad hospitalaria global fue 24,5 por ciento, significativamente menor en pacientes con candidemias vs CI diseminada (16,6 vs 31,8 por ciento, p = 0,02). Conclusiones: Se observó una mayor proporción de Candida no albicans en candidemias de pacientes críticos. Sin embargo, la mayoría de estas cepas fue susceptible a fluconazol. La mortalidad global fue menor en candidemias.


Subject(s)
Adolescent , Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Young Adult , Candidiasis, Invasive/mortality , Intensive Care Units/statistics & numerical data , Antifungal Agents/therapeutic use , Candidiasis, Invasive/drug therapy , Candidiasis, Invasive/microbiology , Hospital Mortality , Hospitals, University , Prospective Studies , Risk Factors
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