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Microbiological and Chemical Exposure Assessment Staff

Armah A. De La Cruz

Title: Research Microbiologist/Immunologist

EPA Division: Microbiological and Chemical Exposure Assessment Research Division

EPA Branch: Microbial Exposure Research Branch

A well-rounded research scientist with background and experience in microbiology, immunology, molecular biology, biochemistry, analytical chemistry, sensor technology and water treatment; developed conventional and emerging methodologies to detect microbial contaminants (e.g., organisms, toxins) and chemical indicators of human contamination in water; assessed rainbarrel water quality, organized workshops and technical seminars; mentored postdoctoral, graduate, undergraduate, and high school students.


  • NIH Trainee in Molecular Immunology, Washington State University. 1990 – 1992
  • Postdoctoral Research Fellow in Cellular Immunology, University of California San Francisco. 1989 - 1990
  • PhD, Medical Microbiology, 1989, University of Georgia Athens
  • MA. Microbiology, 1985, San Francisco State University
  • BA. Microbiology and Immunology, University of California Berkeley. 1982
  • Trainee in Parasitology, University of California, San Francisco. 1978

Professional Experience:

  • 1992 – present, Microbiologist/Immunologist. U.S. EPA, ORD, NERL
  • 2005 – 2006, Microbiologist. U.S. EPA, ORD, NCEA
  • 1985 – 1989, Research Technician. University of Georgia Athens.
  • 1983- 1985, Instructor and Graduate Student Assistant. San Francisco State University

Professional Societies and Affiliations:

  • American Society for Microbiology (ASM)
  • American Chemical Society (ACS)
  • Association of Analytical Communities (AOAC) International

Select Awards and Honors:

  • Interagency Committee on Freshwater Algal Bloom Issues and Guidance for Associated Toxins, 2011-present
  • Co-chair: Detection Issues and Criteria for Validation of Analytical Methods for Cyanotoxins Detection and Global Suitability Session for the 2010 Annual AOAC Meeting, Orlando, FL, September 2010.
  • Guest Editor, Toxicon Journal on “Harmful algal blooms and natural toxins in fresh and marine waters – Exposure, occurrence, detection, toxicity, control, management,” April 2010.
  • Project Advisory Committee (PAC) for the AWWA/Water Research Foundation 2009- present
  • Technical Panel Member for USGS and USEPA/ORD Region 9 Methods Program Interagency, Agreement on “Comparative investigation of analytical methods for microcystins in surface water,” 2008- present.
  • Co-chair: Emerging Aspects on Harmful Algal Bloom and their Effects on Drinking Water Quality, USEPA, 18 November 2008, Cincinnati, OH
  • Co-chair: Algal Toxin Workshop Session for the 2008 WQTC/AWWA Conference, 16-20 November, Cincinnati, OH
  • Co-chair: Algal Toxins Session for the 2008 Toxicology and Risk Assessment Conference, 14-17 April 2008, West Chester, OH
  • Cyanobacteria Workshop Organizing Committee for the International Symposium on Cyanobacterial Harmful Algal Blooms, 6-10 September 2005, Sheraton Hotel, RTP, NC
  • Office of Water Cyanobacteria and their Toxins Workshop, August 2001, Cincinnati, OH
  • University of Cincinnati, Department of civil and Environmental Engineering Graduate Advisory Committee 2004 - present
  • First Place Blue Ribbon Award - US EPA Science Forum 2005

Select Presentations:

  • de la Cruz AA, DD Lye, W Shuster. A pilot study to evaluate roof-collected rain barrel water quality. Annual AOAC Meeting Orlando, FL. 26-29 September 2010.
  • Pelaez, M, C Han, V Likodimos, AG Kontos, P Falaras , AA de la Cruz, and DD Dionysiou. UV and visible light-activated non-metal doped TiO2 photocatalysis: Application for the destruction of the cyanotoxin, Microcystin-LR. The 6th International Conference on Sustainable Water Environment, "Water Infrastructures in Time of. Clayton Hall, University of Delaware, Newark, DE 19716, USA, Climate Change." July 29-31, 2010 (invited).
  • de la Cruz AA. Interference evaluation of immunoassays to detect microcystin-LR in water. AOAC International Pacific Northwest Regional Section Meeting, University of Puget Sound, Tacoma, WA. June 17-19, 2009 (invited).
  • Antoniou, MG, H Choi, M Pelaez, AA de la Cruz, JA Shoemaker, and DD Dionysiou. Visible light activated nitrogen-doped TiO2 nanostructured photocatalysts: destruction of microcystin-LR, an emerging drinking water contaminant. Second International Conference on Semiconductor Photochemistry (SP-2), 23-25 July 2007, Aberdeen, Scotland.
  • Antoniou M.G., H. Choi, A. A. de la Cruz, J.A. Shoemaker, D.D. Dionysiou. 2006. Application of Photocatalytic films for the destruction of the cyanotoxin microcystin-LR: Reaction intermediates. Environmental applications of advanced oxidation processes. Samaria, Greece. (invited oral presentation)
  • Antoniou M.G., H Choi, A.A. de la Cruz, J.A. Shoemaker and D.D. Dionysiou. Application of mesoporous TiO2 photocatalysts for the degradation of microcystin-LR: The degradation pathway. American Chemical Society National Meeting, 2006. San Francisco, CA.
  • A.A. de la Cruz, Antoniou M.G., H. Choi, J.A. Shoemaker and D.D. Dionysiou Detoxification of cyanobacterial toxin-contaminated water using titanium dioxide photocatalytic films. 30th International Symposium on High Performance Liquid Phase Separations and Related Technologies. 2006. San Francisco, CA.
  • de la Cruz AA. 2005. Cyanobacterial toxins and 2005 ISOC HAB exposure assessment workgroup. AOAC International Meeting, Orlando, FL. (invited oral presentation)
  • de la Cruz A.A., R. Venkatapathy, and B. Boutin. Toxicity Assessment of Paralytic Shellfish Poisons (PSPs) using quantitative structure-activity relationships. Association of Analytical Community (AOAC) International Meeting, 2005, Orlando, FL.
  • A.A. de la Cruz, B. Boutin, R. Venkatapathy. Toxicity assessment of paralytic poisons (PSPs) using quantitative structure-activity relationships. Toxicology and Risk Assessment Conference, 2005, Fairborn, OH.

Published & Presented Research (1999-Present)

Contact Info:

Armah A. De La Cruz
National Exposure Research Laboratory
Microbiological & Chemical Exposure Research Division
26 W ML King Drive
Cincinnati, OH 45268-1314
Office: 513-569-7224
Fax: 513-569-7170

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