info:eu-repo/semantics/article
Performance assessment of qPCR assays targeting human- and ruminant-associated Bacteroidetes for microbial source tracking across sixteen countries on six continents
Fecha
2013-06Registro en:
Reischer, Georg H.; Ebdon, James E.; Bauer, Johanna M.; Schuster, Nathalie; Ahmed, Warish; et al.; Performance assessment of qPCR assays targeting human- and ruminant-associated Bacteroidetes for microbial source tracking across sixteen countries on six continents; American Chemical Society; Environmental Science & Technology; 47; 15; 6-2013; 8548-8556
0013-936X
Autor
Reischer, Georg H.
Ebdon, James E.
Bauer, Johanna M.
Schuster, Nathalie
Ahmed, Warish
Åström, Johan
Blanch, Anicet R.
Blöschl, Günter
Byamukama, Denis
Coakley, Tricia
Ferguson, Christobel
Goshu, Goraw
Ko, GwangPyo
de Roda Husman, Ana Maria
Mushi, Douglas
Poma, Hugo Ramiro
Pradhan, Bandana
Rajal, Verónica Beatriz
Schade, Margit A.
Sommer, Regina
Taylor, Huw
Toth, Erika M.
Vrajmasu, Virgil
Wuertz, Stefan
Mach, Robert L.
Farnleitner, Andreas H.
Resumen
Numerous quantitative PCR assays for microbial fecal source tracking (MST) have been developed and evaluated in recent years. Widespread application has been hindered by a lack of knowledge regarding the geographical stability and hence applicability of such methods beyond the regional level. This study assessed the performance of five previously reported quantitative PCR assays targeting human-, cattle- or ruminant-associated Bacteroidetes populations on 280 human and animal fecal samples from 16 countries across six continents. The tested cattle-associated markers were shown to be ruminant-associated. The quantitative distributions of marker concentrations in target and non target samples proved to be essential for the assessment of assay performance and were used to establish a new metric for quantitative source-specificity. In general, this study demonstrates that stable target populations required for marker-based MST occur around the globe. Ruminant-associated marker concentrations were strongly correlated with total intestinal Bacteroidetes populations and with each other, indicating that the detected ruminant-associated populations seem to be part of the intestinal core microbiome of ruminants worldwide. Consequently tested ruminant targeted assays appear to be suitable quantitative MST tools beyond the regional level while the targeted human-associated populations seem to be less prevalent and stable suggesting potential for improvements in human-targeted methods.