16 research outputs found
The weavers index, [electronic resource] : or, The Weavers sure guide, being a ready help to them: by shewing at one view how much Warp may be had to any number of yards, out of any quantity of yarn proposed. To which is added a Feyling Table. By D. and J. Diston.
Electronic reproduction.English Short Title Catalog,Reproduction of original from British Library
Evaluation of Molecular- and Culture-Dependent MST Markers To Detect Fecal Contamination and Indicate Viral Presence in Good Quality Groundwater
Microbial contamination
of groundwater represents a significant
health risk to resource users. Culture-dependent <i>Bacteroides</i> phage and molecular-dependent Bacteroidales 16S rRNA assays are
employed in microbial source tracking (MST) studies globally, however
little is known regarding how these important groups relate to each
other in the environment and which is more suitable to indicate the
presence of waterborne fecal pollution and human enteric viruses.
This study addresses this knowledge gap by examining 64 groundwater
samples from sites with varying hydrogeological properties using a
MST toolbox containing two bacteriophage groups (phage infecting GB-124
and ARABA-84), and two Bacteroidales 16S rRNA markers (Hf183 and BacR);
those were compared to fecal indicator bacteria, somatic coliphage,
Bacteroidales 16S rRNA marker AllBac, four human enteric viruses (norovirus
GI and II, enterovirus and group A rotavirus) and supplementary hydrogeological/chemical
data. Bacteroidales 16S rRNA indicators offered a more sensitive assessment
of both human-specific and general fecal contamination than phage
indicators, but may overestimate the risk from enteric viral pathogens.
Comparison with hydrogeological and land use site characteristics
as well as auxiliary microbiological and chemical data proved the
plausibility of the MST findings. Sites representing karst aquifers
were of significantly worse microbial quality than those with unconsolidated
or fissured aquifers, highlighting the vulnerability of these hydrogeological
settings