University of Saskatchewan

Western College of Veterinary Medicine

Giesy, John

Professor and Canada Research Chair, Environmental Toxicology
Veterinary Biomedical Sciences
Office Location: U of S Toxicology Centre
Phone: 306-966-2096
Fax: 306-966-4796


Dr. John P. Giesy is currently a professor and Canada Research Chair in Environmental Toxicology in the WCVM's Department of Veterinary Biomedical Sciences and the Toxicology Centre at the University of Saskatchewan. He is also Distinguished Professor Emeritus of Zoology at Michigan State University in East Lansing, Michigan, where he was a professor for 26 years. He is also Chair Professor at Large of Biology and Chemistry at City University of Hong Kong and Concurrent Professor of Environmental Science at Nanjing University, China.

Dr. Giesy is a world leading eco-toxicologist with interests in many aspects of eco-toxicology, including both the fates and effects of potentially toxic compounds and elements, particularly in the area of ecological risk assessment. He has conducted research into the movement, bioaccumulation, and effects of toxic substances at different levels of biological organization, ranging from biochemical to ecosystem.

Dr. Giesy has done extensive research in the areas of metal speciation, multi-species toxicity testing, biochemical indicators of stress in aquatic organisms, fate and effects of PAHs, halogenated hydrocarbons, including chlorinated dibenzo-dioxins and -furans, PCBs and pesticides. Dr. Giesy discovered the phenomenon of photo enhanced toxicity of organic compounds, such as PAHs. His studies include both laboratory and field as well as mesocosm studies and apply tools from molecular biology to ecosystem-level. He was the first to report the occurrence of perfluorinated compounds in the environment.

Dr. Giesy has published more than peer-reviewed articles and presented more than 1,000 lectures world-wide. His research is much used and cited by other researchers: Dr. Giesy is in the top 0.1 per cent of active authors (ISI Current Contents) and was the second most cited author in the field of Ecology/Environmental Science over the period of 1997-2007 (In-Cites;

Academic Credentials

Teaching and Clinical Areas

Research Interests


Zhang X, Hecker M, Jones PD, Newsted JL, Au D, Kong RY, Wu RSS, Giesy JP. 2008. "Responses of the medaka HPG axis PCR array and reproduction to prochloraz and ketoconazole." Environmental Science and Technology. 42:6762-6769.

Zwiernik M, Kay D, Moore J, Beckett KJ, Khim JS, Newsted JL, Roark SA, Giesy JP. 2008. "Exposure and effects assessment of resident mink (Mustela vison) exposed to polychlorinated dibenzofurans and other dioxin-like compounds in the Tittabawassee River Basin, Midland, Michigan, USA." Environmental Toxicology and Chemistry.  27:2076-2087.

Reagen WK, Ellefson ME, Kannan K, Giesy JP. 2008. "Comparison of extraction and quantification methods of perfluorinated compounds in human plasma, serum, and whole blood." Analytica Chimica Acta. 628:214-221.

Solomon KR, Carr JA, Du Preez LH, Giesy JP, Kendall RJ. Smith EE, Van Der Kraak GJ. 2008. "Effects of atrazine on fish, amphibians and aquatic reptiles: a critical review." Critical Reviews in Toxicology. 38:721-772.

Novák J, Jálová V, Giesy JP, Hilscherová K. 2009. "Pollutants in particulate and gaseous fractions of ambient air interfere with multiple signaling pathways in vitro."  Environ. Internat. 35:43-49. doi:10.1016/j.envint.2008.06.006.

Luo W, Lu Y-L, Wang B, Tong X-J, Wang G, Shi Y-J, Wang T, Giesy JP. 2008. "Distribution and sources of mercury in soils from former industrialized urban areas of Beijing, China. Environmental Monitoring and Assessment. doi: 10.1007/s10661-008-0600-3.

Yeung LWY, Miyake Y, Taniyasu S, Wang Y, Yu H, So MK, Jiang G, Wu Y,  Li J, Giesy JP, Yamashita N, Lam PKS. 2008. "Perfluorinated compounds and total and extractable organic fluorine in human blood samples from China." Environmental Science and Technology. 42:8140-8145.

Zhang X, Hecker M, Park J-W, Tompsett AR, Jones PD, Newsted JL, Au DWT, Kong RTC, Wu RSS, Giesy JP. 2007. "Time-dependent tanscriptional profiles of hpothalamic-pituitary-gnadal (HPG) ais in Mdaka (O. latipes) exposed to fadrozole and 17beta-trenbolone." Environmental Toxicology and Chemistry. 27:2504-2511.