Reynaud Yann, Gelasse Andric, Multigner Luc, Quénel Philippe, Talarmin Antoine, Guyomard-Rabenirina Stéphanie
Unité Transmission Réservoir et Diversité des Pathogènes, Institut Pasteur de Guadeloupe, Guadeloupe, 97139 Les Abymes, France.
Institut de Recherche en Santé, Environnement et Travail, UMR_S 1085, INSERM, EHESP, University Rennes, 35000 Rennes, France.
Microorganisms. 2024 Oct 21;12(10):2111. doi: 10.3390/microorganisms12102111.
Periodically, the French West Indies receive dust originating from North Africa (NA). Microorganisms associated with desert dust can be transported over long distances through the atmosphere and could represent a means for the remote colonization of new habitats by putatively pathogenic microorganisms. The aim of this study was to determine the diversity and frequency of microbial agents (bacteria, eukaryotes) in NA dusts and the potential threat toward human and/or animal health by comparing microbial air composition during dust events and in control samples. In 2017 and 2018, 16 samples were collected during seven NA dust episodes and there were 9 controls. The microbial composition of the samples was characterized using a cultivable approach and by metabarcoding analyses (16S and 18S). A greater bacterial load and greater diversity were observed during the dust events, and some genera were significantly associated with the events. Some, such as , can be considered signature species of NA dust. No pathogenic species were found with the cultivable approach, whereas the metabarcoding analyses highlighted the presence of several potentially pathogenic species or known human pathogens such as .
法属西印度群岛定期会收到源自北非的沙尘。与沙漠沙尘相关的微生物能够通过大气进行远距离传输，并且可能成为假定的致病微生物远距离定殖新栖息地的一种方式。本研究的目的是通过比较沙尘事件期间和对照样本中的微生物空气组成，来确定北非沙尘中微生物（细菌、真核生物）的多样性和出现频率，以及对人类和/或动物健康的潜在威胁。在2017年和2018年，在七次北非沙尘事件期间采集了16个样本，并有9个对照样本。使用可培养方法并通过元条形码分析（16S和18S）对样本的微生物组成进行了表征。在沙尘事件期间观察到更高的细菌载量和更丰富的多样性，并且一些属与这些事件显著相关。其中一些，例如 ，可被视为北非沙尘的标志性物种。通过可培养方法未发现致病物种，而元条形码分析则突出显示了几种潜在致病物种或已知人类病原体的存在，例如 。
