Centro de Investigaciones en Microbiología y Biotecnología-UR (CIMBIUR), Facultad de Ciencias Naturales, Universidad del Rosario, Bogotá, Colombia.
Grupo de Investigación en Enfermedades Tropicales del Ejército (GINETEJ), Laboratorio de Referencia e Investigación, Dirección de Sanidad Ejército, Bogotá, Colombia.
PLoS Negl Trop Dis. 2024 Mar 13;18(3):e0012029. doi: 10.1371/journal.pntd.0012029. eCollection 2024 Mar.
Cutaneous Leishmaniasis (CL) is a tropical disease characterized by cutaneous ulcers, sometimes with satellite lesions and nodular lymphangitis. Leishmania parasites, transmitted by sandfly vectors, cause this widespread public health challenge affecting millions worldwide. CL's complexity stems from diverse Leishmania species and intricate host interactions. Therefore, this study aims to shed light on the spatial-temporal distribution of Leishmania species and exploring the influence of skin microbiota on disease progression. We analyzed 40 samples from CL patients at three military bases across Colombia. Using Oxford Nanopore's Heat Shock Protein 70 sequencing, we identified Leishmania species and profiled microbiota in CL lesions and corresponding healthy limbs. Illumina sequencing of 16S-rRNA and 18S-rRNA genes helped analyze prokaryotic and eukaryotic communities. Our research uncovered a spatial-temporal overlap between regions of high CL incidence and our sampling locations, indicating the coexistence of various Leishmania species. L. naiffi emerged as a noteworthy discovery. In addition, our study delved into the changes in skin microbiota associated with CL lesions sampled by scraping compared with healthy skin sampled by brushing of upper and lower limbs. We observed alterations in microbial diversity, both in prokaryotic and eukaryotic communities, within the lesioned areas, signifying the potential role of microbiota in CL pathogenesis. The significant increase in specific bacterial families, such as Staphylococcaceae and Streptococcaceae, within CL lesions indicates their contribution to local inflammation. In essence, our study contributes to the ongoing research into CL, highlighting the need for a multifaceted approach to decipher the intricate interactions between Leishmaniasis and the skin microbiota.
皮肤利什曼病(CL)是一种热带疾病,其特征为皮肤溃疡,有时伴有卫星状病变和结节性淋巴管炎。利什曼原虫通过沙蝇媒介传播,导致这一广泛存在的公共卫生挑战,影响着全球数百万人。CL 的复杂性源于多种利什曼原虫物种和复杂的宿主相互作用。因此,本研究旨在阐明利什曼原虫物种的时空分布,并探索皮肤微生物群对疾病进展的影响。我们分析了来自哥伦比亚三个军事基地的 40 名 CL 患者的样本。使用牛津纳米孔的热休克蛋白 70 测序,我们鉴定了 CL 病变和相应健康肢体中的利什曼原虫物种和微生物群。16S-rRNA 和 18S-rRNA 基因的 Illumina 测序有助于分析原核生物和真核生物群落。我们的研究揭示了高 CL 发病率地区与我们采样地点之间的时空重叠,表明存在各种利什曼原虫物种共存。L. naiffi 的发现尤为引人注目。此外,我们的研究还深入探讨了与 CL 病变相关的皮肤微生物群的变化,这些病变是通过刮取采样的,而健康皮肤则是通过刷拭上下肢采样的。我们观察到病变区域内微生物多样性的变化,无论是在原核生物还是真核生物群落中,这表明微生物群在 CL 发病机制中的潜在作用。在 CL 病变部位中,特定细菌家族(如葡萄球菌科和链球菌科)的显著增加表明它们对局部炎症的贡献。总之,我们的研究为 CL 的持续研究做出了贡献,强调了需要采用多方面的方法来解析利什曼病与皮肤微生物群之间复杂的相互作用。
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