Ziros P G, Kokkinos P A, Allard A, Vantarakis A
Environmental Microbiology Unit, Department of Public Health, School of Medicine, University of Patras, 26504, Rion, Greece.
Food Environ Virol. 2015 Sep;7(3):276-85. doi: 10.1007/s12560-015-9182-8. Epub 2015 Feb 4.
Human adenoviruses (hAdVs) of subgroup F (enteric serotypes 40 and 41) display characteristic gut tropism, in vivo, fastidious growth characteristics in cell culture, and are estimated to be associated with 5-20% worldwide of acute gastroenteritis cases among infants and young children. Adequate hAdV gastroenteritis case management requires laboratory-based diagnosis. The present study aimed to the development and evaluation of a simple and cost-effective, one-step, single-tube adenovirus type 40/41 specific loop-mediated isothermal amplification (LAMP) assay for the detection of hAdV40/41 DNA in environmental and/or clinical samples, since no LAMP assay has previously been reported for the detection of these virus types. The assay targeted the hexon gene and had the advantages of being rapid, simple, specific, and sensitive. Results could be obtained within 60 min, under isothermal conditions at 69 °C. The detection limits for hAdV genomes were between 50 and 100 copies/reaction for hAdV40 and hAdV41, and no cross-reactions with other selected viruses, were found. The assay was evaluated with clinical as well as environmental samples. The developed assay is expected to provide a potential molecular tool in obtaining greater knowledge of the hAdV40/41 importance in the epidemiology and clinical manifestations of gastroenteritis.
F亚组人类腺病毒(hAdV,肠道血清型40和41)在体内表现出特有的肠道嗜性,在细胞培养中生长特性挑剔,据估计在全球范围内,5%-20%的婴幼儿急性胃肠炎病例与之相关。对hAdV胃肠炎病例进行充分管理需要基于实验室的诊断。本研究旨在开发和评估一种简单且经济高效的一步单管40/41型腺病毒特异性环介导等温扩增(LAMP)检测方法,用于检测环境和/或临床样本中的hAdV40/41 DNA,因为此前尚无用于检测这些病毒类型的LAMP检测方法报道。该检测方法靶向六邻体基因,具有快速、简单、特异和灵敏的优点。在69℃等温条件下,60分钟内即可获得结果。hAdV40和hAdV41的hAdV基因组检测限为50-100拷贝/反应,且未发现与其他选定病毒的交叉反应。该检测方法用临床样本和环境样本进行了评估。预计所开发的检测方法将为更深入了解hAdV40/41在胃肠炎流行病学和临床表现中的重要性提供一种潜在的分子工具。