Department of Microbiology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, PROSICS Barcelona, Barcelona, Spain.
Department of Infectious Diseases-Drassanes, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, PROSICS Barcelona, Barcelona, Spain.
PLoS Negl Trop Dis. 2021 Nov 10;15(11):e0009884. doi: 10.1371/journal.pntd.0009884. eCollection 2021 Nov.
BACKGROUND: Leishmaniasis is a neglected disease caused by different species of the protozoa Leishmania spp. Cutaneous lesions are the most common clinical manifestation. This disease is prevalent in tropical and subtropical areas, including the Mediterranean basin. In Spain, Leishmania (L.) infantum is the only endemic species, but imported cases are often diagnosed. Different classical parasitological methods can be performed for cutaneous leishmaniasis (CL) diagnosis; but currently molecular techniques serve as a relevant tool for the detection and characterization of Leishmania parasites. We aimed to evaluate clinical and epidemiological characteristics of CL diagnosed patients by real-time PCR in a tertiary hospital over a six-year period. METHODOLOGY/PRINCIPAL FINDINGS: Clinical, epidemiological and microbiological data were retrospectively collected and analyzed. In our study, CL was confirmed in 59 (31.4%) out of 188 patients by real-time PCR, showing an increase over recent years: 11 cases of CL between 2014 and 2016 and 48 between 2017 and 2019. Real-time PCR was performed on skin swabs and/or biopsies samples, with a positivity of 38.5% and 26.5%, respectively. Results were 100% concordant when biopsy and skin swab were performed simultaneously. L. (L.) infantum was the most frequent species detected (50%), followed by L. (L.) major (45%) and Viannia subgenus (5%), which were detected only in imported cases. L. (L.) major was almost entirely detected in travelers/migrants from Morocco. Multiple and atypical skin lesions were more common in imported cases than in autochthonous cases (44.4% vs. 21.8%). CONCLUSIONS/SIGNIFICANCE: An increase in both autochthonous and imported CL cases has been observed in past years in our hospital. Molecular techniques assist in improving CL diagnosis and characterization of the Leishmania species, mainly in imported cases.
背景:利什曼病是一种由不同种利什曼原虫引起的被忽视的疾病。皮肤损伤是最常见的临床表现。这种疾病流行于热带和亚热带地区,包括地中海盆地。在西班牙,利什曼原虫(L.)婴儿是唯一的地方性物种,但经常诊断出输入性病例。不同的经典寄生虫学方法可用于皮肤利什曼病(CL)的诊断;但目前分子技术是检测和鉴定利什曼寄生虫的重要工具。我们旨在评估一家三级医院六年来通过实时 PCR 诊断的 CL 患者的临床和流行病学特征。
方法/主要发现:回顾性收集和分析了临床、流行病学和微生物学数据。在我们的研究中,通过实时 PCR 证实了 188 例患者中的 59 例(31.4%)患有 CL,近年来呈上升趋势:2014 年至 2016 年有 11 例 CL,2017 年至 2019 年有 48 例。对皮肤拭子和/或活检样本进行实时 PCR 检测,阳性率分别为 38.5%和 26.5%。同时进行活检和皮肤拭子时,结果 100%一致。检测到的最常见物种是 L.(L.)婴儿(50%),其次是 L.(L.)主要(45%)和 Viannia 亚属(5%),仅在输入性病例中检测到。L.(L.)主要几乎全部在来自摩洛哥的旅行者/移民中检测到。与本地病例相比,输入性病例中更常见多发性和非典型皮肤损伤(44.4% vs. 21.8%)。
结论/意义:近年来,我们医院的本地和输入性 CL 病例均有所增加。分子技术有助于提高 CL 的诊断和利什曼物种的特征,主要是在输入性病例中。
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