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RESEARCH BIOLOGISTContact Info
Dr. Iwanowicz is a Research Biologist at the USGS, Leetown Science Center, Fish Health Branch located in Kearneysville, WV. He is a multidisciplinary fish health scientist with expertise in the fields of virology, molecular biology, immunology, endocrine physiology, endocrine disruption and environmental health monitoring. Current virological research projects include the application of molecular methods to identify putative viral agents associated with tumors of brown bullheads and white suckers. This research an related work include the application of next generation sequencing methodologies. In addition to this work, he continues to engage in research studies regarding fish health and endocrine disruption associated issues in the Chesapeake Bay Drainage and the Great Lakes. This research utilizes the application of immune, endocrine, and molecular end-points (biomarkers) to assess fish/ ecosystem health. He is currently involved in collaborative research investigating regional fish kills and the presence of intersex in male smallmouth bass. Other work includes the assessment of centrarchid health in Fish and Wildlife Service Region 5 refuges. This research requires the development and application of molecular tools that are used in conjunction with well established physiological biomarkers. Interests include the effects of infectious disease and physiological disruptors (such as endocrine disruptors) on immune system homeostatis and responses. He is an active member of the American Fisheries Society - Fish Health Section for which he currently serves as chair of the communications committee and webmaster of the section website. He is an associate editor of the Journal of Aquatic Animal Health, and a member of the American Society of Microbiology, International Society of Developmental and Comparative Immunology, and the Society of Environmental Toxicology and Chemistry.
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PublicationsIwanowicz, L.R., Blazer, V.S., Hitt, N.P., McCormick, S.D., DuVault, D.S., Ottinger, C.A. (2012) Histologic, Immunologic and Endocrine Biomarkers Indicate Contaminant Effects in Fishes of the Ashtabula River. Ecotoxicology. 21(1): 654-182.
Iwanowicz, LR and VS Blazer (2011) A brief overview of estrogen-associated endocrine in fishes: evidence of effects on reproductive and immune physiology. In: R. C. Cipriano, A. Bruckner and I. S. Shchelkunov, Editors, Aquatic Animal Health: A Continuing Dialogue Between Russia and The United States. Proceedings of the Third Bilateral Conference Between the United States and Russia: Aquatic Animal Health 2009. July 12-20, 2009. Shepherdstown, WV. Michigan State University, East Lansing, Michigan.
Blazer, V.S., Iwanowicz, L.R., Henderson, H., Mazik, P.M., Jenkins, J.A., Alvarez, D.A., and Young, J.A. (2011) Reproductive endocrine disruption in smallmouth bass (Micropterus dolomieu) in the Potomac River basin: spatial and temporal comparisons of biological effects Environmental Monitoring and Assessment, Online First, August 4, 2011.
Ciparis S, Iwanowicz LR, Voshell JR. Effects of watershed densities of animal feeding operations on nutrient concentrations and estrogenic activity in small streams. Science of the Total Environment. In press.
Walsh, HL, LR Iwanowicz, GW Glenney, DD Iwanowicz, VS Blazer. Description of Two New Gill Myxozoans from Smallmouth (Micropterus dolomieu) and Largemouth (M. salmoides) Bass. Journal of Parasitology. In Press.
Iwanowicz, D.D., L.R. Iwanowicz, E.W. Howerth, W.B Schill, V.S. Blazer and R. Johnson (2011) Characterization of Myxobolus stanlii n sp. (Myxozoa: Myxobolidae: Myxosporea) in largescale stonerollers (Campostoma oligolepis) from the Mobile River Basin. Journal of Parasitology. In Press
Ottinger, C.A., D. Honeyfield, C.L. Densmore, L.R. Iwanowicz. Impact of Thiamine Deficiency on T-cell Dependent and T-cell Independent Antibody Production in Lake Trout (Salvelinus namaycush). Journal of Aquatic Animal Health. In Press.
Iwanowicz, L.R., R. Patino J. Stafford, E. Bengten, N.W. Miller, and V. Blazer. Estrogen receptor isoforms ERα and ERβ2 in channel catfish leukocytes and the modulatory effects of 17β-estradiol. Fish & Shellfish Immunology In Press.
Bykova, L., S.A. Archer-Hartmann, L.A. Holland, L.R. Iwanowicz, and V.S. Blazer (2010) Steroid determination in fish plasma using capillary electrophoresis. Environmental Toxicology and Chemistry 29:1950-1956.
Blazer, V.S., L.R. Iwanowicz, C.E. Starliper, D.D. Iwanowicz, P. Barbash, J.D. Hedrick, S.J. Reeser, J.E. Mullican, S.D. Zaugg, M.R. Burkhardt and J. Kelble (2010) Mortality of Centrarchids in the Potomac Drainage: Survey of Results and Overview of Potential Contributing Factors. Journal of Aquatic Animal Health 22: 190-218.
Ripley, J.L, L.R. Iwanowicz, V.S. Blazer and C.M. Foran. (2009) Author’s Response to If Poultry's to Blame, Where's the Proof? Environmental Toxicology and Chemistry. 28: 908-909.
Alvarez, D.A., Cranor, W.L., Perkins, S.D., Schroeder, V., Iwanowicz, L.R., Clark, R.C., Guy, C.P., Pinkney, A., Blazer, VS. (2009) Reproductive Health of Bass in the Potomac Drainage: 2) Seasonal Occurrence of Persistent and Emerging Organic Contaminants. Environmental Toxicology and Chemistry. 28: 1084-1095.
Iwanowicz, L.R., Blazer, V.S., Guy, C.P., Pinkney, A.E. Mullican, J. and Alvarez. D.A. (2009) Reproductive Health of Bass in the Potomac Drainage: 1) Biological Effects of Wastewater Treatment Plant Effluent. Environmental Toxicology and Chemistry. 28: 1072-1083.
Robertson, L.S., Iwanowicz, L.R., and Marranca, J.M. (2009) Identification of Centrarchid Hepcidins and Evidence that 17β-Estradiol Disrupts Constitutive Expression of Hepcidin-1 and Inducible Expression of Hepcidin-2 in Largemouth Bass. Fish & Shellfish Immunology. 26; 898–907.
Iwanowicz, L.R., V.S. Blazer, S.D. McCormick, P. Van Veld, C.A. Ottinger. (2009) Aroclor 1248 exposure leads to immunomodulation, decreased disease resistance and endocrine disruption in the brown bullhead, Ameiurus nebulosus. Aquatic Toxicology. 93: 70-82.
Iwanowicz, L.R., D.D. Cartwright, L.M. Pote, V.S. Blazer, W.B. Schill (2008) Morphology and 18S rDNA of Henneguya gurlei (Myxosporea) from Ameiurus nebulosus (Siluriformes) in North Carolina, USA. Journal of Parasitology. 94: 46-57.
Ripley, J.L, L.R. Iwanowicz, V.S. Blazer and C.M. Foran. (2008) Utilization of Protein Profiles as Indicators of Environmental Impairment of Smallmouth Bass (Micropterus dolomieu) from the Shenandoah River, VA, USA. Environmental Toxicology and Chemistry. 27: 1756-1767.
Blazer,V.S., L.R. Iwanowicz, D.D. Iwanowicz, D.R. Smith, J.A. Young, J. Hedrick, S. W. Foster, S. J. Reeser. (2007) Intersex (Testicular Oocytes) in Smallmouth Bass Micropterus dolomieu From the Potomac River and Selected Nearby Drainages. Journal of Aquatic Animal Health. 19: 242-253.
Iwanowicz, L.R., A.R. Griffin, D.D. Cartwright, V.S. Blazer (2006) Mortality and pathology in brown bullheads Amieurus nebulosus associated with a spontaneous Edwardsiella ictaluri outbreak under tank culture conditions. Diseases of Aquatic Organisms. 70: 219-225.
Iwanowicz,L.R., D.T. Lerner, V.S. Blazer and S.D. McCormick (2005) Aqueous Exposure to Aroclor 1254 Modulates the Mitogenic Response of Atlantic Salmon Anterior Kidney T-cells: indications of short- and long-term immunomodulation. Aquatic Toxicology. 72: 305-314.
Densmore, C., C.A. Ottinger, V.S. Blazer L.R. Iwanowicz and David R. Smith (2004) Immunomodulation and disease resistance in postyearling rainbow trout (Oncorynchus mykiss) infected with Myxobolus cerebralis, the causative agent of whirling disease. Journal of Aquatic Animal Health. 16: 73-82.
Iwanowicz,L., L Brown, B Eltz, F Juanes and J Murt (2004) Book Review. In a Perfect Ocean: The state of fisheries and ecosystems in the North Atlantic Ocean. Reviews in Fish Biology and Fisheries.14: 149-151.
Iwanowicz,L., C Densmore and C Ottinger (2004) Calcein AM released-based cytotoxic cell assay for fish leucocytes. Fish & Shellfish Immunology 16: 127 - 137.
McIntire, M., L R Iwanowicz and A E Goodwin (2003) Molecular, physical and clinical evidence that Golden Shiner Virus (GSV) and Grass Carp Reovirus (GCRV) are variants of the same virus. Journal of Aquatic Animal Health. 15: 257-263.
Densmore, C.L., C.A. Ottinger, V.S. Blazer and L.R. Iwanowicz (2002). Immunomodulation and disease resistance in Myxobolus cerebralis infected rainbow trout. Proceedings of the 8th Annual Whirling Disease Symposium.
Iwanowicz, L.R. and A E Goodwin (2002) Characterization of a new bacilliform fathead minnow rhabdovirus that produces syncytia in tissue culture. Archives of Virology 147: 889 – 916.
Iwanowicz, L.R. A E Goodwin and J Harshbarger (2001) Embryonal rhabdomyosarcoma of the giant gourami, Colisa fasciata (Bloch & Schneider). Journal of Fish Diseases 24:177-179.
Iwanowicz, L.R. A E Goodwin and N Heil (2000) A small RNA virus isolated from apparently healthy wild sandbar shiners, Notropis scepticus. Journal of Fish Diseases 23: 349-352.
Iwanowicz, L.R and C.A. Ottinger (2009) Estrogens, Estrogen Receptors and Their Role as Immunoregulators in Fish. In Fish Defenses, Volume 1: Immunology. Eds. G. Zaccone, J. Meseguer, A. Garcia-Ayala, and B.G. Kapoor. Science Publishers, Enfield, NH, USA. Pp. 277-322.
My USGS Science Strategy AreasUnderstanding Ecosystems & Predicting Ecosystems Change
The Role of Environment and Wildlife in Human Health
11649 Leetown Road
Kearneysville, WV 25430
304-724-4435 - Fax
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