Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s10453-011-9230-2 |
Pathogens as potential hitchhikers on intercontinental dust | |
Toepfer, Ilka2; Favet, Jocelyne1; Schulte, Anette2; Schmoelling, Maria2; Butte, Werner3; Triplett, Eric W.4; Broughton, William J.1; Gorbushina, Anna A.1,2,5,6,7 | |
通讯作者 | Broughton, William J. |
来源期刊 | AEROBIOLOGIA
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ISSN | 0393-5965 |
出版年 | 2012 |
卷号 | 28期号:2页码:221-231 |
英文摘要 | Desert dust seeds distant lands and waters with minerals as well as micro-organisms raising the question of whether this ancient phenomenon also spreads pathogens across the globe. Severe dust storms require strong winds blowing over land-masses that are largely devoid of vegetation, effectively limiting the scope for winds to raise pathogens into the air. Nevertheless, changing patterns of land-use, often driven by belligerency, result in refugees spreading to areas that were previously deemed barely habitable. With the help of the International Committee of the Red Cross, a number of sand/dust samples were collected from the Republic of Chad, some near refugee camps, others further removed from human influence. In parallel studies, we documented the micro-organisms present in these samples and used a number of the isolates here to test the effect of environmental constraints on their ability to survive intercontinental flight. We also added traditional pathogens to the palette of microbes and tested the effects of UV irradiation, desiccation and temperature on survival of both bacteria and fungi. A clear trend was obvious-those microbes that are coloured or able to form conidia or spores (in other words, those that are native to deserts) were well able to resist the imposed stresses. On the other hand, most pathogens were more sensitive to stresses than the environmental isolates. Toxin production in two species of Aspergillus was also investigated. Short-term desiccation (simulating environmental conditions during intercontinental travel) of sand amended with fungal spores containing sterigmatocystin leads to increased mycotoxin contents, but significant mycotoxin production was only possible under growth-permissive conditions, e. g. at higher humidity. It thus seems likely that an ever-decreasing fraction of the initial pathogen load survives as the dust recedes from its desert source and that those organisms that land on other continents are highly enriched in desert dwellers. |
英文关键词 | Chad Desert sand Sterigmatocystin Aspergillus sydowii A. versicolor |
类型 | Article |
语种 | 英语 |
国家 | Switzerland ; Germany ; USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000305977200014 |
WOS关键词 | WIND EROSION ; SIZE DISTRIBUTIONS ; DESERT DUST ; TRANSPORT ; MICROORGANISMS ; SAHARAN ; CRUSTS ; GRAINS ; SOILS ; LIFE |
WOS类目 | Biology ; Environmental Sciences |
WOS研究方向 | Life Sciences & Biomedicine - Other Topics ; Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/171007 |
作者单位 | 1.Univ Geneva, CH-1211 Geneva 4, Switzerland; 2.Carl von Ossietzky Univ Oldenburg, ICBM, D-26111 Oldenburg, Germany; 3.Carl von Ossietzky Univ Oldenburg, Dept Pure & Appl Chem, D-26111 Oldenburg, Germany; 4.Univ Florida, Dept Microbiol & Cell Sci, Gainesville, FL 32611 USA; 5.Free Univ Berlin, Fac Biol, D-12249 Berlin, Germany; 6.Free Univ Berlin, Fac Chem & Pharmacol, D-12249 Berlin, Germany; 7.Free Univ Berlin, Fac Geosci, D-12249 Berlin, Germany |
推荐引用方式 GB/T 7714 | Toepfer, Ilka,Favet, Jocelyne,Schulte, Anette,et al. Pathogens as potential hitchhikers on intercontinental dust[J],2012,28(2):221-231. |
APA | Toepfer, Ilka.,Favet, Jocelyne.,Schulte, Anette.,Schmoelling, Maria.,Butte, Werner.,...&Gorbushina, Anna A..(2012).Pathogens as potential hitchhikers on intercontinental dust.AEROBIOLOGIA,28(2),221-231. |
MLA | Toepfer, Ilka,et al."Pathogens as potential hitchhikers on intercontinental dust".AEROBIOLOGIA 28.2(2012):221-231. |
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