Candida infections

念珠菌感染
  • 文章类型: Journal Article
    念珠菌感染的发病率在过去十年有所增加,对公众健康构成严重威胁。适当面对这一挑战需要关于物种和抗菌素耐药性发生率的准确流行病学数据,但许多国家缺乏适当的监测方案。这项研究旨在通过从Tetouan的四个诊所中鉴定和表型收集长达一年的临床分离株(n=93)来弥合摩洛哥的这一差距。我们将目前的物种鉴定标准与分子方法进行了比较,并评估了对氟康唑和anidulafungin的敏感性。我们的结果确定了目前使用的诊断方法的局限性,并显示白色念珠菌是最流行的物种,有60株(64.52%),其次是光滑梭菌,占14(15.05%),C.近apsilia与6(6.45%),和热带梭状芽胞杆菌4(4.30%)。此外,我们报告了摩洛哥首次鉴定的C.对氟康唑的敏感性结果表明,一些分离株正在接近白色念珠菌的MIC抗性断点(2),和C.glabrata(1)。我们的研究还确定了白色念珠菌中的抗anidulafungin菌株(1),C.热带(1),和C.krusei(2),由于对氟康唑的先天抗性,使后者的两种菌株具有多重耐药性。这些结果引起了人们对摩洛哥物种鉴定和抗真菌耐药性的关注,并强调迫切需要更准确的方法和预防策略来对抗该国的真菌感染。
    The incidence of Candida infections has increased in the last decade, posing a serious threat to public health. Appropriately facing this challenge requires precise epidemiological data on species and antimicrobial resistance incidence, but many countries lack appropriate surveillance programs. This study aims to bridge this gap for Morocco by identifying and phenotyping a year-long collection of clinical isolates (n = 93) from four clinics in Tetouan. We compared the current standard in species identification with molecular methods and assessed susceptibility to fluconazole and anidulafungin. Our results identified limitations in currently used diagnostics approaches, and revealed that C. albicans ranks as the most prevalent species with 60 strains (64.52%), followed by C. glabrata with 14 (15.05%), C. parapsilosis with 6 (6.45%), and C. tropicalis with 4 (4.30%). In addition, we report the first identification of C. metapsilosis in Morocco. Susceptibility results for fluconazole revealed that some isolates were approaching MICs resistance breakpoints in C. albicans (2), and C. glabrata (1). Our study also identified anidulafungin resistant strains in C. albicans (1), C. tropicalis (1), and C. krusei (2), rendering the two strains from the latter species multidrug-resistant due to their innate resistance to fluconazole. These results raise concerns about species identification and antifungal resistance in Morocco and highlight the urgent need for more accurate methods and preventive strategies to combat fungal infections in the country.
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  • 文章类型: Journal Article
    由于广泛化疗后免疫系统减弱,癌症患者中会出现念珠菌属的机会性真菌感染。抗真菌药物的预防已经发展出念珠菌属的抗性。抗真菌药。准确识别酵母菌和易感性模式是直接影响患者治疗的主要问题。
    在三年的时间里,目前的调查包括了325名疑似念珠菌感染的癌症患者。通过聚合酶链反应-限制性片段长度多态性(PCR-RFLP)对临床分离株进行分子鉴定。所有菌株,对两性霉素B的体外敏感性进行了检查,伊曲康唑,氟康唑,和anidulafungin根据CLSIM27文档。
    74例癌症患者有念珠菌感染(22.7%)。白色念珠菌是最常见的物种(83.8%)。抗真菌药敏结果表明,100%的念珠菌分离株对两性霉素B敏感;17.6%,9.4%,5.4%的临床分离株对阿尼达芬净耐药,氟康唑,和伊曲康唑,分别。
    本工作的结果表明,对棘白菌素的抗性有警告性增加。由于所有氟康唑耐药菌株均来自念珠菌菌血症,我们推荐两性霉素B作为这种潜在致死性感染的一线治疗药物.
    Opportunistic fungal infections by Candida species arise among cancer patients due to the weakened immune system following extensive chemotherapy. Prophylaxis with antifungal agents have developed the resistance of Candida spp. to antifungals. Accurate identification of yeasts and susceptibility patterns are main concerns that can directly effect on the treatment of patients.
    Over a period of three years, 325 cancer patients suspected to Candida infections were included in the current investigation. The clinical isolates were molecularly identified by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). All strains, were examined for in vitro susceptibility to the amphotericin B, itraconazole, fluconazole, and anidulafungin according to the CLSI M27 document.
    Seventy-four cancer patients had Candida infections (22.7%). Candida albicans was the most common species (83.8%). Antifungal susceptibility results indicated that 100% of the Candida isolates were sensitive to amphotericin B; however, 17.6%, 9.4%, and 5.4% of clinical isolates were resistant to anidulafungin, fluconazole, and itraconazole, respectively.
    The findings of the present work shows a warning increase in resistance to echinocandins. Since all fluconazole resistance isolates were obtained from candidemia, we recommend amphotericin B as the first line therapy for this potentially fatal infection.
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  • 文章类型: Journal Article
    念珠菌血流感染(BSI)仍然是危重病和免疫抑制癌症患者BSI的主要原因之一。鉴于不断变化的流行病学和不断上升的抗性物种,治疗持续时间和从静脉(IV)逐步治疗到口服抗真菌药物的适当时机对于最大限度地控制疾病和总生存期至关重要.
    我们进行了一项多中心回顾性研究,来自巴西四家不同医疗机构的119名非中性粒细胞减少症患者,黎巴嫩,西班牙和美国,评估成年患者静脉治疗的持续时间和逐步采用口服治疗的适当时间,14岁及以上,有记录在案的念珠菌病。使用统计程序R和SASv9.4进行分析。描述性统计以频率和表格的形式呈现,Fisher精确检验用于测试分类变量之间的关联:有机体,癌症,国家,抗真菌药物和治疗持续时间,和下台的时间。
    白色念珠菌占血流感染的45%,而非白色念珠菌占感染的55%。三种最常见的非白色念珠菌是:光滑念珠菌24%,近平滑念珠菌13%,热带念珠菌8%。大多数(57%)的患者被送进ICU,而52%有潜在的恶性肿瘤。多因素分析显示,入住ICU或需要化疗的潜在癌症与失败和死亡独立相关(p<0.001)。所有患者的平均总治疗持续时间为14天,有反应并存活的患者为16天。45名患者因念珠菌血症的临床和微生物学解决而被降级为氟康唑和/或伏立康唑。降压的平均(和中值)天为5天。与没有降级的患者(56%生存率)相比,降级的患者具有更有利的结果(78%生存率)(P=0.022)。然而,与接受>5天治疗(24%死亡率-p=0.75)的25例患者相比,20例患者在开始口服唑类药物之前接受了1~4天的首次IV治疗(20%死亡率),其结局与接受>5天治疗(24%死亡率-p=0.75)相当.
    我们的数据支持IDSA指南,即念珠菌菌血症的治疗总持续时间应在血培养阴性后至少14天。然而,在念珠菌菌血症的非中性粒细胞减少性癌症患者中,只要患者对血流感染有临床和微生物分析,就可以在早期(开始IV治疗后4天内)安全地逐步减少口服唑类药物治疗.
    UNASSIGNED: Candida bloodstream infection (BSI) remains one of the leading causes of BSI in critically ill and immunosuppressed cancer patients. In light of the changing epidemiology and rising resistant species, duration of treatment and appropriate timing of stepdown therapy from intravenous (IV) to oral antifungal agents are crucial for utmost disease control and overall survival.
    UNASSIGNED: We performed a multicenter retrospective study, with 119 non-neutropenic patients enrolled from four different medical institutions in Brazil, Lebanon, Spain and the United States, to assess the duration of IV therapy and appropriate time to step-down to oral therapy in adult patients, 14 years of age and older, with documented candidemia. The analysis was done using the statistical program R and SAS v9.4. Descriptive statistics are presented as frequencies and tables and the Fisher exact test was used to test the association between the categorical variables: organism, cancer, country, antifungal drug and duration of therapy, and time of step-down.
    UNASSIGNED: Candida albicans contributed to 45% of bloodstream infection versus 55% of infection caused by Candida non-albicans. The three most common Candida non-albicans are: Candida glabrata 24%, Candida parapsilosis 13% and Candida tropicalis 8%. Most (57%) of the patients were admitted to ICU, whereas 52% had underlying malignancy. Multivariate analysis showed that a stay at ICU or an underlying cancer requiring chemotherapy were independently associated with failure and death (p <0.001). The average total duration of therapy was 14 days in all patients and 16 days in those who responded and survived. Forty-five patients were stepped down to either fluconazole and/or voriconazole in association with clinical and microbiologic resolution of the candidemia. The average (and median) day of step-down was 5 days. Patients who had a stepdown had more favorable outcomes (78% survival) as compared to those with no stepdown (56% survival) (P = 0.022). However, the 20 patients who received 1-4 days of first IV treatment before a stepdown to oral azoles had a comparable outcome (20% mortality) to the 25 patients who received >5 days of treatment (24% mortality - p = 0.75).
    UNASSIGNED: Our data support the IDSA guidelines in that the total duration of treatment for candidemia should be at least 14 days after a negative blood culture. However, in non-neutropenic cancer patients with candidemia, a step-down to oral azole therapy can safely take place early (within 4 days of initiating IV therapy) as long as the patient had clinical and microbiologic resolution of the bloodstream infections.
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  • 文章类型: Journal Article
    OBJECTIVE: Human studies on the role of mannose-binding lectin (MBL) in patients with invasive candidiasis have yielded conflicting results. We investigated the influence of MBL and other lectin pathway proteins on Candida colonization and intra-abdominal candidiasis (IAC) in a cohort of high-risk patients.
    METHODS: Prospective observational cohort study of 89 high-risk intensive-care unit (ICU) patients. Levels of lectin pathway proteins at study entry and six MBL2 single-nucleotide polymorphisms were analyzed by sandwich-type immunoassays and genotyping, respectively, and correlated with development of heavy Candida colonization (corrected colonization index (CCI) ≥0.4) and occurrence of IAC during a 4-week period.
    RESULTS: Within 4 weeks after inclusion a CCI ≥0.4 and IAC was observed in 47% and 38% of patients respectively. Neither serum levels of MBL, ficolin-1, -2, -3, MASP-2 or collectin liver 1 nor MBL2 genotypes were associated with a CCI ≥0.4. Similarly, none of the analyzed proteins was found to be associated with IAC with the exception of lower MBL levels (HR 0.74, p = 0.02) at study entry. However, there was no association of MBL deficiency (<0.5 μg/ml), MBL2 haplo- or genotypes with IAC.
    CONCLUSIONS: Lectin pathway protein levels and MBL2 genotype investigated in this study were not associated with heavy Candida colonization or IAC in a cohort of high-risk ICU patients.
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