Alexandria K. Graves

Department of Soil Science
North Carolina State University
PO Box 7619
Raleigh, North Carolina 27695-7619

Room: 3411E
Office Phone: 919.513.0635
Email: alexandria_graves@ncsu.edu

Specialty: Soil and Environmental Microbiology

Research interests involve efforts in detecting potential pathogenic microorganisms in environmental waters using bacterial source tracking (BST) techniques. One of the main emphases of BST is to identify the source of indicator bacteria such as fecal coliforms, E. coli and Enterococcus sp. This interest provides multiple research opportunities to examine the validity of selected microorganisms as indicators of sewage or fecal contamination, to evaluate selected methods of detection, and to establish the applicability of these microorganisms for regulatory use in the context of establishing total maximum daily loads (TMDLs). Such information is needed by regulatory agencies to develop new indicators and standards to protect the public from risk of enteric disease. Waterways can become impaired in various ways; however the protection from pathogenic microbe contamination is most important for waters used for human recreation and aquaculture.


Research - Refereed Journals

  • Graves, A.K. 2011. Food safety and implications for microbial source tracking. In C. Hagedorn, A. Blanch and V.J. Harwood (eds.) Microbial Source Tracking: Methods, Applications and Case Studies. Springer Publishers, New York, NY. (accepted)
  • Graves, A.K., L. Liwimbi, D.W. Israel, E. van Heugten, B. Robinson, C.W. Cahoon and J. F. Lubbers. 2011. Distribution of ten antibiotic resistance genes in E. coli isolates from swine manure, lagoon effluent and soil collected from a lagoon waste application field. Folia Microbiol. (In press)
  • Hathaway, J.M., W.F. Hunt, A.K. Graves, K.L. Bass, and A.E. Caldwell. 2011. Exploring fecal indicator bacteria in a constructed stormwater wetland. W. Sci. Technol. (In press)
  • J.P. Holt, E. van Heugten, A.K. Graves, M.T. See, W.E.M. Morrow. 2011. Growth performance and antibiotic tolerance patterns of nursery and finishing pigs fed growth-promoting levels of antibiotics. Livestock Sci. 136 (2): 184–191.
  • Graves, A.K. and C. Hagedorn. 2010. Identifying sources of fecal pollution in water with antibiotic resistance patterns. Environ. Res. J. 5(6): 749-774.
  • Graves, A.K. and R.W. Weaver. 2010. Characterization of Enterococci populations collected from a subsurface flow constructed wetland. J. Applied. Microbiol. 108 (4):1226-1234.
  • Liwimbi, L., A.K. Graves, D.W. Israel, E. van Heugten, B. Robinson, C.W. Cahoon and J.F. Lubbers. .2010. Microbial source tracking in a watershed dominated by swine. WATER (3), 587-604.
  • Graves, A.K. and C. Hagedorn. 2009. Antibiotic resistance as a method for determining sources of fecal pollution in water. In Frank Columbus (ed.), Antibiotic Resistance: Causes and Risk Factors, Mechanisms and Alternatives. pp. 283-311. Hauppauge, NY: Nova Science Publishers.
  • Graves, A.K., R.W. Weaver and J. Entry. 2009. Characterization of enterococci populations in livestock manure using BIOLOG. Microbiol. Res. 64(3):260-6.
  • Graves, A.K., C. Hagedorn, A. Brooks, R.L. Hagedorn and E. Martin. 2007. Microbial source tracking in a rural watershed dominated by cattle. Water Res. 41(16): 3729-3739.
  • Weaver, R., J. Entry, and A. K. Graves. 2005. Numbers of Enterococci and E. coli in fresh and dry cattle, horse, and sheep manure. Can. J. Microbiol. 51(10): 847-851.
  • Booth, A.M., C. Hagedorn, A.K. Graves, S.C. Hagedorn, and K.H. Mentz. 2003. Sources of Fecal Pollution in Virginias Blackwater . J. Environ. Engineering. 129 (6), 547-552.
  • Hagedorn, C., J.B. Crozier, K.A. Mentz, A.M. Booth, A.K. Graves, N.J. Nelson, and R.B. Reneau, Jr. 2003. Carbon Source Utilization Profiles as a Method to Identify Sources of Fecal Pollution in Water. J. Appli. Micro. 94 (5), 792-799.
  • Graves, A.K., C. Hagedorn, A. Teetor, M. Mahal, A.M. Bowman, and R.B. Reneau, Jr. 2002. Antibiotic Resistance Profiles to Determine Sources of Fecal Contamination in a Rural Virginia Watershed. J. Environ. Qual. 31:1300-1308.

Peer Reviewed Proceedings

  • Hagedorn, C., A. K. Graves, and R. B. Reneau, Jr. 1999. Developing Methods for Bacterial Source Tracking. In (R.W. Seabloom, ed.) Proceedings, 10th Northwest On-site Wastewater Treatment Conference. Pp. 61-70. Univ. of Washington, Seattle.
  • Hagedorn, C., A.K. Graves, and R. B. Reneau, Jr. 1999. Identifying Sources of Fecal Pollution in a Rural Virginia Watershed. Proceedings, 8th Annual Conference, National On-site Wastewater Recycling Association. Paper D1, Jekyll Island, GA.