Uma análise epidemiológica das infecções urinárias por Candida spp. em unidade de terapia intensiva

Background and objectives: The finding of Candida species in urine is an usual finding and is called candiduria. There is an increase in the frequency of urinary tract infections (UTI) caused by Candida especially in critically ill patients. This study aimed to determine the epidemiological, clinical, and mycological characteristics of Candida urinary infections in intensive care unit (ICU) and antifungal susceptibilities. Methods: Urine cultures of 394 ICU patients with clinical suspicion of UTI were evaluated. After 24-48 hours of incubation, colonies appeared to grow as yeast, were morphologically examined by Gram staining. Candida strains that grew 104 ≥ CFU/mL in urine cultures were accepted as candiduria. The susceptibilities of the Candida strains to amphotericin B, itraconazole, fluconazole, voriconazole, flucytosine, and caspofungin were investigated with broth microdilution method. Results: The distribution of the isolated 100 urinary Candida strains were as, 54 Candida albicans, 34 C. glabrata, 7 C. tropicalis, 2 C. kefyr, 2 C. lusitaniae, and 1 as C. parapsilosis. Among 100 Candida species isolated in our study susceptibility rates of amphotericin B, flucytosine, caspofungin, fluconazole, itraconazole, and voriconazole were 100%, 100%, 91%, 23%, 13%, 25.8%, respectively. Conclusion: Accurate identification of Candida spp., as well as the investigating the antifungal susceptibility, will be beneficial in terms of the effectiveness of the treatment and the prevention of resistance development.El hallazgo de especies de Candida en la orina es un hallazgo habitual y se denomina candiduria. Hay un aumento en la frecuencia de infecciones del tracto urinario (ITU) causadas por Candida, especialmente en pacientes críticamente enfermos. Este estudio tuvo como objetivo determinar las características epidemiológicas, clínicas y micológicas de las infecciones urinarias por Candida en la unidad de cuidados intensivos (UCI) y la susceptibilidad antifúngica. Métodos: Se evaluaron urocultivos de 394 pacientes de UCI con sospecha clínica de ITU. Después de 24-48 horas de incubación, las colonias parecían crecer como levadura, se examinaron morfológicamente mediante tinción de Gram. Las cepas de Candida que crecieron 104 ≥ UFC / ml en urocultivos se aceptaron como candiduria. Las susceptibilidades de las cepas de Candida a la anfotericina B, itraconazol, fluconazol, voriconazol, flucitosina y caspofungina se investigaron con el método de microdilución en caldo. Resultados: La distribución de las cepas 100 urinarias aisladas de Candida fue de, 54 C. albicans, 34 C. glabrata, 7 C. tropicalis, 2 C. kefyr, 2 C. lusitaniae y 1 como C. parapsilosis. Entre las 100 especies de Candida aisladas en nuestro estudio, las tasas de susceptibilidad de anfotericina B, flucitosina, caspofungina, fluconazol, itraconazol y voriconazol fueron 100%, 100%, 91%, 23%, 13%, 25,8%, respectivamente. Conclusión: La identificación precisa de Candida spp., así como la investigación de la susceptibilidad antifúngica, será beneficiosa en términos de la eficacia del tratamiento y la prevención del desarrollo de resistencias.O achado de espécies de Candida na urina é um achado comum e é chamado de candidúria. Há um aumento na frequência de infecções do trato urinário (ITU) causadas por Candida, principalmente em pacientes críticos. Este estudo teve como objetivo determinar as características epidemiológicas, clínicas e micológicas das infecções urinárias por Candida em unidade de terapia intensiva (UTI) e a susceptibilidade aos antifúngicos. Métodos: Foram avaliadas culturas de urina de 394 pacientes de UTI com suspeita clínica de ITU. Após 24-48 horas de incubação, as colônias pareceram crescer como leveduras, foram morfologicamente examinadas por coloração de Gram. As cepas de Candida que cresceram ≥104 UFC/mL em culturas de urina foram aceitas como candidúria. As suscetibilidades das cepas de Candida à anfotericina B, itraconazol, fluconazol, voriconazol, flucitosina e caspofungina foram investigadas com o método de microdiluição em caldo. Resultados: A distribuição das cepas 100 isoladas de Candida urinária foi de 54 Candida albicans, 34 C. glabrata, 7 C. tropicalis, 2 C. kefyr, 2 C. lusitaniae e 1 como C. parapsilosis. Entre 100 espécies de Candida isoladas em nosso estudo, as taxas de susceptibilidade de anfotericina B, flucitosina, caspofungina, fluconazol, itraconazol e voriconazol foram de 100%, 100%, 91%, 23%, 13%, 25,8%, respectivamente. Conclusão: A identificação precisa de Candida spp., bem como a investigação da susceptibilidade aos antifúngicos, será benéfica em termos de eficácia do tratamento e prevenção do desenvolvimento de resistência

MBL2 and MIF gene polymorphisms in cardiovascular patients with atherosclerotic lesions undergoing heart valve replacement

The basic underlying factor for cardiovascular diseases is atherosclerosis, which is a multifactorial disease driven by environmental and genetic factors. We aimed to study the genetic polymorphism in mannose binding lectin-2 (MBL2) and macrophage migration inhibitory factor (MIF) in the arteries of patients with atherosclerotic lesions who underwent cardiac valve replacement for cardiac valve stenosis. Thirty-five patients (38.9 %) operated with coronary bypass surgery (coronary group, CG), 55 (61.1 %) patients operated with aortic or mitral valve replacement (valve group, VG) and 100 healthy controls were analyzed for codon 54 A/B polymorphism in the MBL2 gene and –173 G/C polymorphism in the MIF gene by using the method of polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP). The comparison of the healthy control group with CG and VG in terms of the MBL2 genotypes revealed significantly lower AA genotype and A allele ratios. The comparison of the healthy control group with CG and VG in terms of the MIF genotypes showed significantly lower GG genotype and G allele ratios. We suggest that the lower frequency of the GG genotype/G allele of the MIF gene and of the AA genotype/A allele of the MBL2 gene may be associated with the ethiopathogenesis of CG and VG patients

Frequency of azole resistance in clinical and environmental strains of Aspergillus fumigatus in Turkey: a multicentre study

Objectives Aspergillus fumigatus causes several diseases in humans and azole resistance in A. fumigatus strains is an important issue. The aim of this multicentre epidemiological study was to investigate the prevalence of azole resistance in clinical and environmental A. fumigatus isolates in Turkey. Methods Twenty-one centres participated in this study from 1 May 2018 to 1 October 2019. One participant from each centre was asked to collect environmental and clinical A. fumigatus isolates. Azole resistance was screened for using EUCAST agar screening methodology (EUCAST E.DEF 10.1) and was confirmed by the EUCAST E.DEF 9.3 reference microdilution method. Isolates with a phenotypic resistance pattern were sequenced for the cyp51A gene and microsatellite genotyping was used to determine the genetic relationships between the resistant strains. Results In total, resistance was found in 1.3% of the strains that were isolated from environmental samples and 3.3% of the strains that were isolated from clinical samples. Mutations in the cyp51A gene were detected in 9 (47.4%) of the 19 azole-resistant isolates, all of which were found to be TR34/L98H mutations. Microsatellite genotyping clearly differentiated the strains with the TR34/L98H mutation in the cyp51A gene from the strains with no mutation in this gene. Conclusions The rate of observed azole resistance of A. fumigatus isolates was low in this study, but the fact that more than half of the examined strains had the wild-type cyp51A gene supports the idea that other mechanisms of resistance are gradually increasing

Frequency of azole resistance in clinical and environmental strains of Aspergillus fumigatus in Turkey: a multicentre study.

Objectives Aspergillus fumigatus causes several diseases in humans and azole resistance in A. fumigatus strains is an important issue. The aim of this multicentre epidemiological study was to investigate the prevalence of azole resistance in clinical and environmental A. fumigatus isolates in Turkey. Methods Twenty-one centres participated in this study from 1 May 2018 to 1 October 2019. One participant from each centre was asked to collect environmental and clinical A. fumigatus isolates. Azole resistance was screened for using EUCAST agar screening methodology (EUCAST E.DEF 10.1) and was confirmed by the EUCAST E.DEF 9.3 reference microdilution method. Isolates with a phenotypic resistance pattern were sequenced for the cyp51A gene and microsatellite genotyping was used to determine the genetic relationships between the resistant strains. Results In total, resistance was found in 1.3% of the strains that were isolated from environmental samples and 3.3% of the strains that were isolated from clinical samples. Mutations in the cyp51A gene were detected in 9 (47.4%) of the 19 azole-resistant isolates, all of which were found to be TR34/L98H mutations. Microsatellite genotyping clearly differentiated the strains with the TR34/L98H mutation in the cyp51A gene from the strains with no mutation in this gene. Conclusions The rate of observed azole resistance of A. fumigatus isolates was low in this study, but the fact that more than half of the examined strains had the wild-type cyp51A gene supports the idea that other mechanisms of resistance are gradually increasing