Determining Sources of Fecal Contamination in Two Rivers of Northumberland County, Virginia

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dc.contributor.authorSzeles, Cheryl Lynneen
dc.contributor.committeechairHagedorn, Charles IIIen
dc.contributor.committeememberReneau, Raymond B. Jr.en
dc.contributor.committeememberEick, Matthew J.en
dc.contributor.departmentCrop and Soil Environmental Sciencesen
dc.date.accessioned2014-03-14T21:34:18Zen
dc.date.adate2003-04-25en
dc.date.available2014-03-14T21:34:18Zen
dc.date.issued2003-04-09en
dc.date.rdate2004-04-25en
dc.date.sdate2003-04-22en
dc.description.abstractThe goal of monitoring the water quality of shellfish beds is to provide protection against transmission of water-borne infectious diseases. The Coan River and the Little Wicomico River contain shellfish beds that are closed to harvest due to contamination with fecal bacteria. These two rivers are located in Northumberland County, Virginia, and empty into the lower Potomac River and the Chesapeake Bay. Bacterial source tracking (antibiotic resistance analysis of Eschericia coli) was used to determine the sources of fecal contamination that have caused shellfish harvest closures in these two rivers. A total of 1,248 Eschericia coli isolates were collected from known sources to build a regional library for the rivers. The Virginia Department of Shellfish Sanitation (DSS) and project cooperators collected known source samples from August 2001 to September 2002. The Average Rate of Correct Classification for the known source library was 71.9%, with a total of 930 isolates correctly classified. The categories (and rates of correct classification) were Birds (84.7%), Humans (74.8%), Livestock (72.4%), Pets (62.0%), and Wildlife (65.7%). The library was used to identify the sources of Eschericia coli isolated from DSS sampling stations along the Coan and Little Wicomico Rivers from August 2001 to September 2002. Some stations contained a substantial human signature, while wildlife and birds are also major contributors. The results will be used to decide the necessary changes that need to be addressed if the shellfish harvesting beds are to be reopened.en
dc.description.degreeMaster of Scienceen
dc.identifier.otheretd-04222003-171204en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-04222003-171204/en
dc.identifier.urihttp://hdl.handle.net/10919/42178en
dc.publisherVirginia Techen
dc.relation.haspartCLSETDTableofContents3.pdfen
dc.relation.haspartCLSETDAcknowledgements2.pdfen
dc.relation.haspartCLSETDAppendix12.pdfen
dc.relation.haspartCLSETDAppendix13.pdfen
dc.relation.haspartCLSETDTitlePageA.pdfen
dc.relation.haspartCLSETDListofFigures5.pdfen
dc.relation.haspartCLSETDSummary&Conclusions10.pdfen
dc.relation.haspartCLSETDListofTables4.pdfen
dc.relation.haspartCLSETDIntroduction6.pdfen
dc.relation.haspartCLSETDResults&Discussion9.pdfen
dc.relation.haspartCLSETDAbstractB.pdfen
dc.relation.haspartCLSETDMaterials&Methods8.pdfen
dc.relation.haspartCLSETDReviewofLiterature7.pdfen
dc.relation.haspartCLSETDDedication1.pdfen
dc.relation.haspartCLSETDVita14.pdfen
dc.relation.haspartCLSETDLiteratureCited11.pdfen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectEscherichia colien
dc.subjectbacterial source trackingen
dc.subjectwatershedsen
dc.subjectshellfishen
dc.titleDetermining Sources of Fecal Contamination in Two Rivers of Northumberland County, Virginiaen
dc.typeThesisen
thesis.degree.disciplineCrop and Soil Environmental Sciencesen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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