Source tracking pertains to the ability of some hypertext systems to rigorously track the exact source of every document or partial document included in the system; that is, they remember who entered the information, when it was entered, when it was updated and by whom, and so on. This allows determining the exact history of every document (and even small parts of documents).
"Ribotyping and Bacterial SourceTracking (BST)" -- http://srwqis.tamu.edu/bst.aspx
Patterns and sources of fecal coliform bacteria in three streams in Virginia, 1999-2000, U.S. Geological Survey Water-Resources Investigations Report 03-4115.
Use of the Hydrological Simulation Program-FORTRAN and Bacterial SourceTracking for Development of the fecal coliform Total Maximum Daily Load (TMDL) for Accotink Creek, Fairfax County, Virginia, U.S. Geological Survey Water-Resources Investigations Report 03-4160.
When researchers sent E. coli challenge isolates (the sources of which were unknown to those conducting the tests) for testing, many isolates either remained unclassified or were classified to incorrect sources.
Some E. coli strains have been found in more than one animal source, such as when animals live in close proximity with one another, though no evidence to support this premise was found in the USGS study.
For the immediate future, researchers and end users would be prudent to use caution and to incorporate quality-control measures to validate the accuracy of sourcetracking results.
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