Research Molecular Biologist
U.S. Department of Agriculture
Agricultural Research Service
National Center for Cool & Cold Water Aquaculture
11861 Leetown Road
Kearneysville, WV 25430
Voice: (304) 724-8340 x2132
Professional Biographical Information:
2023 - Present Research Molecular Biologist, NCCCWA-ARS-USDA
2008 - 2023 Research Biologist, USGS Eastern Ecological Science Center, Leetown, WV
2003 - 2008 Ph.D., Wildlife & Fisheries Conservation, University of Massachusetts, Amherst
Advisor: Dr. Stephen McCormick
2006 - 2008 Fish Biologist, USGS Leetown Science Center, Leetown, WV
2002 - 2006 Laboratory Technician; USGS Leetown Science Center, Leetown, WV
2001 - 2002 Marine Scientist Senior, Virginia Institute of Marine Sciences
2000 - 2001 Biologist II, Johnson Controls World Services
1998 - 2000 M.S., Aquaculture/ Fisheries, University of Arkansas at Pine Bluff
Advisor: Dr. Andrew Goodwin
1993 - 1997 B.S, Fish Biology (Biology minor), University of Massachusetts, Amherst
Peer Reviewed Publications (Pre-USDA-ARS)
Masoner, J.R., D.W. Kolpin, I.M. Cozzarelli, P.M. Bradley, B.B. Arnall, K.J. Forshay, J.L. Gray, J.F. Groves, M.L. Hladik, L.E. Hubbard, L.R. Iwanowicz, J.B. Jaeschke, R.F. Lane, R.B. McCleskey, B.F. Polite, D.A. Roth, M.B. Pettijohn, and M.C. Wilson. 2023. Contaminant exposure and transport from three potential reuse waters within a single watershed. Environmental Science & Technology. 57(3); 1353-136.
Meade, E.B., L.R. Iwanowicz, N. Neureuther, G.H. LeFevre, D.W. Kolpin, H. Zhi, S.M. Meppelink, R.F. Lane, A. Schmoldt, A. Mohaimani, O. Mueller, R.D. Klaper. 2023.Transcriptome of Danio rerio embryos exposed to effluent-dominated stream water reveals biomarker signatures specific to developmental stage and seasonal changes in emerging contaminants. Science of the Total Environment. 856; 159069.
Leet, J.K., J.B. Greer, C.A. Richter, L.R. Iwanowicz, E. Spinard, J. McDonald, C. Conway, R.W. Gale, D.E. Tillitt, J.D. Hansen. 2022. Exposure to 17α-ethinylestradiol results in differential susceptibility of largemouth bass (Micropterus salmoides) to bacterial infection. Environmental Science & Technology. 56; 14375-143.
Clark, K.H., D.D. Iwanowicz, L.R. Iwanowicz, SJ Mueller, JM Wisor, C. Bradshaw-Wilson, W.B. Schill, J.R. Stauffer and E.W. Boyer. 2022. Freshwater unionid mussels threatened by predation of Round Goby (Neogobius melanostomus). Scientific Reports. 12: 1-11.\
Schumann, P.G., E.B. Meade, H. Zhi, G.H. LeFevre, D.W. Kolpin, S.M. Meppelink, L.R. Iwanowicz, R.F. Lane, A. Schmoldt, O. Mueller and R.D. Klaper. 2022. RNA-seq reveals potential gene biomarkers in fathead minnows (Pimephales promelas) for exposure to treated wastewater effluent. Environmental Science: Processes and Impacts. 24; 1708-172.
Zhi, H., D.T. Webb, J.L. Schnoor, D.W. Kolpin, R.D. Klaper, L.R. Iwanowicz, and G.H. LeFevre. 2022. Modelling risk dynamics of contaminants of emerging concern in a temperate-region wastewater effluent-dominated stream. Environmental Science: Water Research and Technology. 8; 1408-142.
Farag, A.M., D.D. Harper, I.M. Cozzarelli, D. Kent, A. Mumford, D.M. Akob, T. Schaeffer and L.R. Iwanowicz. 2022. Using Biological Responses to Monitor Freshwater Post-Spill Conditions over 3 years in Blacktail Creek, North Dakota, USA. Environmental Contamination and Toxicology. 83; 253-27.
Smalling, K.L., B.A. Mosher, L.R. Iwanowicz, K.A. Loftin, A. Boehlke, M.L. Hladik, C.R. Muletz-Wolz, N. Cortes, R. Femmer, E.H.C. Grant. 2022. Site- and individual-level contamination affects infection prevalence of an emerging infectious disease of amphibians. Environmental Toxicology & Chemistry. 41; 781-791.
Hui, Z., A.L. Mianecki, D.W. Kolpin, R.D. Klaper, L.R. Iwanowicz, and G.H. LeFevre. 2021. Combined field and laboratory approaches to quantify attenuation mechanisms of pharmaceutical and transformation products in a wastewater effluent-dominated stream. Water Research. 117537.
Bradley, PM, DR LeBlanc, KM Romanok, KL Smalling, MJ Focazio, MC Cardon, JM Clark, JM Conley, N Evans, CE Givens, JL Gray, LE Gray, PC Hartig, CP Higgins, ML Hladik, LR Iwanowicz, KA Loftin, RB McCleskey, CA McDonough, EK Medlock-Kakaley, CP Weis, VS Wilson. 2021. Public and private tapwater: Comparative analysis of contaminant exposure and potential risk, Cape Cod, Massachusetts, USA. Environment International. 152; 106487.
Bradley, PM, IY Padilla, KM Romanok, KL Smalling, MJ Focazio, SE Breitmeyer, MC Cardon, JM Conley, N Evans, CE Givens, JL Gray, LE Gray, PC Hartig, CP Higgins, ML Hladik, LR Iwanowicz, RF Lane, KA Loftin, RB McCleskey, CA McDonough, E Medlock-Kakaley, S Meppelink, CP Weis, VS Wilson. 2021. Pilot-scale expanded assessment of inorganic and organic tapwater exposures and predicted effects in Puerto Rico, USA. Science of The Total Environment. 788; 147721.
Kakaley, EM, MC Cardon, N Evans, LR Iwanowicz, JM. Allen, E Wagner, K Bokenkamp, SD Richardson, MJ Plewa, PM Bradley, KM Romanok, DW Kolpin, JM Conley, LE Gray, PC Hartig, VS Wilson. 2020. In vitro effects-based method and water quality screening model for use in pre- and post-distribution treated waters. Science of The Total Environment. 768; 144750.
Webb, DT, H Zhi, DW Kolpin, RD Klaper, LR Iwanowicz, GH LeFevre. 2021. Emerging investigator series: municipal wastewater as a year-round point source of neonicotinoid insecticides that persist in an effluent-dominated stream. Environmental Science: Processes & Impacts. 23; 678.
Gordon, S.E., D.K. Jones, V.S. Blazer, L.R. Iwanowicz, B. Williams and K. Smalling. Modeling Estrogenic Activity in Streams Throughout the Chesapeake Bay Watershed. Environmental Monitoring and Assessment. 193,105.
Adams, C.R1, V.S. Blazer, J. Sherry, R.S. Cornman, and Iwanowicz, L.R1. 2021. Phylogeographic Genetic Diversity in the White Sucker Hepatitis B Virus from liver tissue and plasma of white sucker, Catostomus commersonii, from the Great Lakes Region and Alberta, Canada. Viruses. 13; 285.
Ottinger, C.A., C.R. Smith, V.S. Blazer, L.R. Iwanowicz, M.A. Vogelbein and S. Kaattari. 2021. Anti- Smallmouth Bass (Micropterus dolomieu) Immunoglobulin Monoclonal Antibody Production, Characterization and Use. Fish & Shellfish Immunology. 113; 20-23. doi: 10.1016/j.fsi.2021.03.006.
Smalling, K.L., J.C. Rowe, C.A. Pearl, L.R. Iwanowicz, C.E. Givens, C.W. Anderson, B. McCreary, M.J. Adams. 2021. Variation in wetland water quality related to livestock grazing in Oregon Spotted frog (Rana pretiosa) habitat. Environmental Monitoring and Assessment. 193, 58.
Duan, S, L.R. Iwanowicz, K. Noguera-Oviedo, S.S. Kaushal, E.J. Rosenfeldt, D.S. Aga, S. Murthy. 2021. Evidence that Watershed Nutrient Management Practices Effectively Reduce Estrogens Pollution in Environmental Waters. Science of the Total Environment. 758; 143904.
Li, Y., V.S Blazer; L.R. Iwanowicz; M.K. Schall; K. Smalling; D.E Tillitt; T. Wagner. 2020. Ecological risk assessment of environmental stress and bioactive chemicals to riverine fish populations: an individual-based model of smallmouth bass Micropterus dolomieu. Ecological Modelling. 438; 109322.
Blazer, V.S., S.E. Gordon, D.K. Jones, L.R. Iwanowicz, H.L. Walsh, A.J. Sperry and K.L. Smalling. 2020. A Retrospective Analysis of Estrogenic Endocrine Disruption and Land-Use Influences in the Chesapeake Bay Watershed. 266; 129009.
Zhi, H., D.W. Kolpin, R.D. Klaper, L.R. Iwanowicz, S.M. Meppelink, and G.H. LeFevre 2020. Occurrence and Spatiotemporal Dynamics of Pharmaceuticals in a Temperate-region Wastewater Effluent-dominated Stream: Variable Inputs and Differential Attenuation Yield Evolving Complex Exposure Mixtures. Environmental Science and Technology. 54; 12967-12978.
Iwanowicz, L.R. K. Smalling, V.S Blazer, R.P Braham, L.R. Sanders, A. Boetsma, N. Procopio, S. Goodrow, G. Buchnanan, D. Mileman, B. Ruppel, J. Vile, B. Henning and J. Abatemarco. 2020. Reconnaissance of surface water estrogenicity and the prevalence of intersex in smallmouth bass (Micropterus dolomieu) inhabiting New Jersey. International Journal of Environmental Research and Public Health.
Blazer, V.S., K.T. Young, G.D. Smith, A.J. Sperry and L.R. Iwanowicz. 2020. Hyperpigmented melanistic skin lesions of smallmouth bass Micropterus dolomieu from the Chesapeake Bay Watershed. Diseases of Aquatic Organisms. 139; 199-212.
White, SL, DA DeMario, LR Iwanowicz, VS Blazer and T Wagner. 2020. Tissue Distribution and Immunomodulation in Channel Catfish (Ictalurus punctatus) Following Dietary Exposure to Polychlorinated Biphenyl Aroclors and Food Deprivation. International Journal of Environmental Research and Public Health. 17(4), 1228.
Hubbard, LE, CE Givens, LR Iwanowicz, DW Griffin, MT Meyer, DW Kolpin. 2020. Poultry litter as potential source of pathogens and other contaminants in groundwater and surface water proximal to large-scale poultry confined feeding operations. Science of the Total Environment. 735; 139459.
Bradley, PM, M Argos, DW Kolpin, SM Meppelink, KM Romanok, KL Smalling, MJ Focazio, JM Allen, JE Dietze, MJ Devito, AR Donovan, N Evans, CE Givens, JL Gray, CP Higgins, ML Hladik, LR Iwanowicz, CA Journey, RF Lane, ZR.Laughrey, KA Loftin, RB McCleskey, CA McDonough, E Medlock-Kakaley, MT Meyer, AR Putz, SD Richardson, AE.Stark, CP Weis, VS Wilson, A Zehraoui. 2020. Mixed organic and inorganic tapwater exposures and potential effects in greater Chicago area, USA. Science of the Total Environment. 719; 137236.
Bradley, P. K. Romanok, J. Clark, J. Duncan, M.L. Hladik, W.A. Battaglin, J.B. Huffman, L.R. Iwanowicz, and C.A. Journey. 2020. Exposure and Potential Effects of Pesticides and Pharmaceuticals in Protected Streams of the US National Park Service Southeast Region. Science of the Total Environment. 704; 135431.
Densmore, C.L.; Iwanowicz, D.D.; McLaughlin, S.M.; Ottinger, C.A.; Spires, J.E.; Iwanowicz, L.R. 2019. Influenza A Virus Detected in Native Bivalves in Waterfowl Habitat of the Delmarva Peninsula, USA. Microorganisms. 7: 334.
Berninger, J.P., D.M. DeMarini, S.H. Warren, J.E. Simmons, V.S. Wilson, J.M. Conley, M.D. Armstrong, L.R. Iwanowicz, D.W. Kolpin, K.M. Kuivila, T.J. Reilly, K.M. Romanok, D.L. Villeneuve and P.M. Bradley 2019. Predictive Analysis Using Chemical-Gene Interaction Networks Consistent with Observed Endocrine Activity and Mutagenicity of U.S. Streams. Environmental Science & Technology. Environmental Science and Technology. 53; 8611-8620.
Bradley, P., D. Kolpin, Romanok, K, Smalling, K, Focazio, M, Brown, J, Cardon, M, Carpenter, K, Corsi, S, De Cicco, L, Dietze, J, Evans, N, Furlong, E, Givens, C, Gray, James, Griffin, D, Higgins, C, Hladik, M, Iwanowicz, L, Journey, C, Kuivila, K, Masoner, J, McDonough, C, Meyer, M, Orlando, J, Strynar, M, Weis, C, and Wilson, V. 2018. Reconnaissance of Chemical Contaminant Exposures from Residential and Workplace Tapwaters at Selected Sites in the United States. Environmental Science & Technology. 52; 13972-13985.
Blazer, VS, HL Walsh, C.H. Shaw, LR Iwanowicz, RP Braham and PM Mazik. 2018. Indicators of exposure to estrogenic compounds at Great Lake Areas of Concern: species and site comparisons. Environmental Monitoring and Assessment. 190:577.
Iwanowicz, L.R. A.E. Pinkney, C.P. Guy, A.M. Major, K. Munney, V.S. Blazer, D.A. Alvarez, H.L. Walsh, A. Sperry R. Braham, Lakyn R. Sanders and D.R. Smith. 2018. Temporal evaluation of estrogenic endocrine disruption markers in smallmouth bass reveals seasonal variability in intersex. Science of the Total Environment. 646: 245-256.
Battaglin, WA, PA Bradley, LR Iwanowicz, VS Blazer, HL Walsh and CA Journey. 2018. Pharmaceuticals, Hormones, Pesticides, and other Anthropogenic Bioactive Chemicals in Water, Sediment, and Fish from Rocky Mountain National Park, 2012-13. Environmental Toxicology and Chemistry. Science of the total Environment. 643; 651-673.
Iwanowicz, LR, D.D. Iwanowicz, C.R. Adams, T.D. Lewis, T.M. Brandt L.R. Sanders and R.S. Cornman. 2018. Isolation and genomic characterization of a novel Aquareovirus A detected in the endangered fountain darter, Etheostoma fonticola. Diseases of Aquatic Organisms. 130; 95-108.
Galbraith, H.S., D.D. Iwanowicz, D.E. Spooner, L.R. Iwanowicz, D. Keller, P. Zelanko and C.R. Adams. 2018. Effects of synthetic hydraulic fracturing waste on mucosal bacterial community structure inhabiting the brook trout epidermis. AIMS Microbiology. 4(3): 413-427.
Griffin, D.W., W.M. Benzel, S.C. Fisher, M.J. Focazio, L.R. Iwanowicz, K.A. Loftin, T.J. Reilly, and D.K Jones. 2018. The presence of antibiotic resistance genes in coastal soil and sediment samples from the eastern seaboard of the United States. Environmental Monitoring and Assessment. 191; 300.
Iwanowicz, LR, VS Blazer, H Walsh, C Hahn, DS DeVault and JA Banda. 2018. Contaminant-Associated Health Effects in Fishes from the Ottawa and Ashtabula Rivers, Ohio. Journal of Great Lakes Research. 44; 184-196.
Morrison, CL, LR Iwanowicz, TM Work, E. Fahsbender, RS Cornman, DD Iwanowicz, L Sanders, CR Adams, M Ackermann, J Casey and M Breitbart. 2017. Genomic Evolution and Inter-strain Diversity of Chelonid Herpes Virus 5 (ChHV5) from Florida and Hawaii green sea turtles (Chelonia mydas). PeerJ. 6:e4386.
Densmore, C.L., D.D. Iwanowicz, C.A. Ottinger, L.J. Hindman, A.M. Bessler, L.R. Iwanowicz, D. J. Prosser, M. Whitbeck, and C.P. Driscoll. 2017. Molecular detection of the avian influenza virus from sediment samples in waterfowl habitats on the Delmarva Peninsula, USA. Avian Diseases. 61(4); 520-525.
Hubbard, L. E., D.W. Kolpin, C.L. Fields, M.L. Hladik, L.R. Iwanowicz, S.K. Spencer. 2017. Highlighting the complexities of a groundwater pilot study during an avian influenza outbreak: methods, lessons learned, and select contaminant results. Environmental Research. 158: 212-224.
Bradley, P.M., W.A. Battaglin, J.M. Clark, F. Henning, L.R. Iwanowicz, C.A. Journey, J.W. Riley, and K.M. Romanok. 2017. Widespread Occurrence and Potential for Biodegradation of Bioactive Contaminants in Congaree National Park, USA. Environmental Toxicology & Chemistry.
Conley, J.M., N. Evans, M.C. Cardon, L. Rosenblum, L.R. Iwanowicz, P.C. Hartig, K.M. Schenck, P.M. Bradley, V.S. Wilson. 2017. Occurrence and in vitro bioactivity of estrogen, androgen, and glucocorticoid compounds in a nationwide screen of United States stream waters. Environmental Science & Technology. 51: 4781-4791.
Bradley, Paul, C. Journey, K. Romanok, L. Barber, H. Buxton, W. Foreman, E. Furlong, S. Glassmeyer, M. Hladik, L. Iwanowicz, D. Jones, D. Kolpin, K. Kuivila, K. Loftin, M. Mills, M. Meyer, J. Orlando, T. Reilly, K. Smalling, and D. Villeneuve. 2017. Expanded Target-Chemical Assessment Reveals Extensive Mixed-Organic-Contaminant Exposure in USA Streams. Environmental Science & Technology. Environmental Science & Technology. 51:4792-4802.
Prosser, D.J. C.L. Densmore, L.J. Hindman, D.D. Iwanowicz, C.A. Ottinger, L.R. Iwanowicz, C.P. Driscoll, and J.L. Nagel. 2017. Low-pathogenic avian influenza viruses in wild migratory waterfowl in a region of high poultry production, Delmarva, Maryland. Avian Diseases. 61:128-134.
Good, C., J. Davidson, L. Iwanowicz, M. Meyer, J. Dietze, D. Kolpin, D. Marancik, C. Russell, J. Summerfelt, and S. Summerfelt. 2016. Investigating the influence of nitrate nitrogen on post-smolt Atlantic salmon Salmo salar reproductive physiology in water recirculation aquaculture systems. Aquacultural Engineering 78: 2-8.
Cozzarelli, I.M., K.J. Skalak, D. B. Kent, M.A. Engle, A. Benthem, A.C. Mumford, K. Haase, A. Farag, D. Harper, S. C. Nagel, L.R. Iwanowicz, W. H. Orem, D. M. Akob J. B. Jaeschke, J. Galloway, M. Kohler, D. L. Stoliker and G. Jolly. 2016. Environmental signatures and effects an oil and gas wastewater spill in the Williston Basin, North Dakota. Science of the Total Environment. 579: 1781-1793.
Stavreva, DA, P Klausmeyer, AA George, L Varticovski, D Sack, TC Voss, RL Schiltz, VS Blazer, LR Iwanowicz, and GL Hager. 2016. Novel Cell-based Assay for Detection of Thyroid Receptor-Interacting Chemicals. Toxicology. 368-369; 69-79.
Hahn, C.M, L. R. Iwanowicz, V.S. Blazer, Heather L. Walsh, Ryan P. Braham and P. Mazik. 2016. Transcriptome Discovery in Non-Model Wild Fish Species for the Development of Quantitative Transcript Abundance Assays. Fish Physiology and Biochemistry Part D: Genomics and Proteomics. 20: 27-40.
Kassotis, CD, LR Iwanowicz, DM. Akob, IM Cozzarelli, A.C. Mumford, W.H. Orem and SC Nagel. 2016. Endocrine Disrupting Activities of Surface Water Associated with a West Virginia Oil and Gas Industry Wastewater Disposal Site. Science of the Total Environment. 557-558: 901-910.
Bradley, P. W. Battaglin, L. Iwanowicz, J. Clark, and C. Journey. 2015. Aerobic Biodegradation Potential of Endocrine Disrupting Chemicals in Surface-Water Sediment at Rocky Mountain National Park. Environmental Toxicology and Chemistry. 35: 1087-1096.
Densmore, C.L., L.R. Iwanowicz, A.P. Henderson, D.D. Iwanowicz, and J.S. Odenkirk. 2015. Mycobacterial infection in Northern snakehead (Channa argus) from the Potomac River Catchment. Journal of Fish Diseases. 39: 771-775.
Iwanowicz, L.R., V.S. Blazer, A.E. Pinkney, C.P. Guy, A.M. Major, K. Munney, S. Mierzykowski, S. Lingenfelser, A. Secord, K. Patnode, T.J. Kubiak, C. Stern, C.M. Hahn, D.D. Iwanowicz, H.L. Walsh, and A. Sperry. 2016. Evidence of estrogenic endocrine disruption in smallmouth and largemouth bass inhabiting Northeast U.S. National Wildlife Refuge waters: a reconnaissance study. Ecotoxicology and Environmental Safety. 124:50-59.
Hahn, CM, L.R. Iwanowicz, R.S. Cornman, C.M. Conway, J.R. Winton, and V.S. Blazer. 2015. Characterization of a Novel Hepadnavirus in the White Sucker (Catostomus commersonii) from the Great Lakes Region of the USA. Journal of Virology. 89: 11801-11811. (Feature Spotlight).
Jenkins J.A., R.O. Draugelis-Dale, A.E. Pinkney, L.R. Iwanowicz, and V.S. Blazer. 2015. Flow cytometric method for measuring chromatin fragmentation in fixed sperm from yellow perch (Perca flavescens). Theriogenology. 83(5): 920-31.
Iwanowicz, L.R., J. Stafford, R. Patino, E. Bengten, N.W. Miller, and V. Blazer. 2014. Channel catfish (Ictalurus punctatus) leukocytes express estrogen receptor isoforms ERα and ERβ2 and are functionally modulated by estrogens. Fish & Shellfish Immunology. 40: 109-119.
Young, J, L. Iwanowicz, V. Blazer, and A. Sperry. 2014. A landscape-based reconnaissance survey of estrogenic activity in streams of the upper Potomac, upper James, and Shenandoah Rivers, USA. Environmental Monitoring and Assessment. 186: 5531 – 5545.
Blazer, V.S, D.D. Iwanowicz, H.L. Walsh, A.J. Sperry, L.R. Iwanowicz, D.A. Alvarez, R.A. Brightbill, G. Smith and R. Manning. Reproductive Health Indicators of Fishes from Pennsylvania Watersheds: Association with Chemicals of Emerging Concern. 2014. Environmental Monitoring and Assessment. 186:6471-6491.
Duffy, T.A. L.R. Iwanowicz, and S.D. McCormick. 2014. Comparative responses to endocrine disrupting compounds in early life stages of Atlantic salmon, Salmo salar. Aquatic Toxicology. 152C: 1-10.
Ottinger, C.A., D.C. Honeyfield, C.L. Densmore, and L.R. Iwanowicz. 2014. In vitro immune function in thiamine-replete and -depleted Lake Trout (Salvelinus namaycush). Fish & Shellfish Immunology. 38: 211-220.
Gorelick, DA., Luke R. Iwanowicz, Alice L. Hung, Vicki S. Blazer and Marnie E. Halpern. 2014. Tissue-specific estrogen receptor activation in response to environmental endocrine disruptors. Environmental Health Perspectives. 122: 356-362. IP-049283. 9/13/2013.
Ekman, DR, GT Ankley, VS Blazer, TW Collette, N Garcia-Reyero, LR Iwanowicz, ZG Jorgenson, KE Lee, PM Mazik, DH Miller, EJ Perkins, ET Smith, JE Tiege and D Villeneuve. 2013. Biological Effects-based Tools for Monitoring Impacted Surface Waters in the Great Lakes: A Multiagency Program in Support of the Great Lakes Restoration Initiative. Environmental Practice. 15: 409-426.
Iwanowicz, L, C Densmore, C Hahn, P McAllister and J Odenkirk. 2013. Identification of Largemouth Bass Virus in the Introduced Northern snakehead (Channa argus) inhabiting the Chesapeake Bay Watershed. Journal of Aquatic Animal Health. 25:191-196.
Iwanowicz, DD, L.R. Iwanowicz, E.W. Howerth, W.B Schill, V.S. Blazer and R. Johnson. 2013. Characterization of Myxobolus stanlii n sp. (Myxozoa: Myxobolidae: Myxosporea) in largescale stonerollers (Campostoma oligolepis) from the Mobile River Basin. Journal of Parasitology. 99:102-111.
Blazer, VS, AE Pinkney, JA Jenkins, LR Iwanowicz, S Minkkinen, RO Draugelis-Dale and JH Uphoff. 2013. Reproductive Health of Yellow Perch Perca flavescens in Selected Tributaries of the Chesapeake Bay. Science of the Total Environment. 447:198-209.
Kolpin, DW, VS Blazer, JL Gray, MJ Focazio, JA Young, DA Alvarez, LR Iwanowicz, WT Foreman, ET Furlong, GK Speiran, SD Zaugg, LE Hubbard, MT Meyer, MW Sandstrom, LB Barber. 2013. Chemical Contaminants in Water and Sediment near fish nesting sites in the Potomac River Basin: Determining Potential Exposures to Smallmouth Bass (Micropterus dolomieu). Science of the Total Environment. 443C: 700-716.
Walsh, HL, VS Blazer, LR Iwanowicz, G Smith. 2012. A Redescription of Myxobolus inornatus from Young-of-the-Year Smallmouth Bass Micropterus dolomieu. Journal of Parasitology. 98:1236-1242.
Stavreva, DA, P Klausmeyer, AA George, L Varticovski, D Sack, TC Voss, RL Schiltz, VS Blazer, LR Iwanowicz, and GL Hager. 2012. Prevalent Glucocorticoid and Androgen Activity in US Water Sources. Scientific Reports. 2: 937.
Ottinger, C.A., D. Honeyfield, C.L. Densmore, L.R. Iwanowicz. 2012. Impact of Thiamine Deficiency on T-cell Dependent and T-cell Independent Antibody Production in Lake Trout (Salvelinus namaycush). Journal of Aquatic Animal Health. 24: 258-273.
Walsh, HL, LR Iwanowicz, GW Glenney, DD Iwanowicz, VS Blazer. 2012. Description of Two New Gill Myxozoans from Smallmouth (Micropterus dolomieu) and Largemouth (M. salmoides) Bass. Journal of Parasitology. 98: 415-422.
Ciparis, S, LR Iwanowicz and JR Voshell. 2012. Effects of watershed densities of animal feeding operations on nutrient concentrations and estrogenic activity in agricultural streams. Science of the Total Environment, 414: 268-276.
Iwanowicz, LR, VS Blazer, NP Hitt, SD McCormick, DS DuVault, and CA Ottinger. 2012. Histologic, Immunologic and Endocrine Biomarkers Indicate Contaminant Effects in Fishes of the Ashtabula River. Ecotoxicology. 21: 654-682.
Blazer, VS, LR Iwanowicz, CE Starliper, DD Iwanowicz, P Barbash, JD Hedrick, SJ Reeser, JE Mullican, SD Zaugg, MR 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.
Bykova, L, SA Archer-Hartmann, LA Holland, LR Iwanowicz and VS Blazer. 2010. Steroid determination in fish plasma using capillary electrophoresis. Environmental Toxicology and Chemistry 29:1950-1956.
Iwanowicz, LR, VS Blazer, SD McCormick, P Van Veld, CA 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.
Robertson, LS, LR Iwanowicz, and JM Marranca. 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, LR, VS Blazer, CP Guy, AE Pinkney, J Mullican and DA Alvarez. 2009. Reproductive Health of Bass in the Potomac Drainage: 1) Biological Effects of Wastewater Treatment Plant Effluent. Environmental Toxicology and Chemistry. 28: 1072-1083.
Alvarez, DA, WL Cranor, SD Perkins, V Schroeder, LR Iwanowicz, RC Clark, CP Guy, A Pinkney and VS Blazer. 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.
Ripley, JL, LR Iwanowicz, VS Blazer and CM Foran. 2009. Author’s Response to If Poultry's to Blame, Where's the Proof? Environmental Toxicology and Chemistry. 28: 908-909.
Blazer, VS, LR Iwanowicz, H Henderson, PM Mazik, JA Jenkins, DA Alvarez and J Young. 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. 184: 4309-4334.
Ripley, JL, LR Iwanowicz, VS Blazer and CM 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.
Iwanowicz, LR, DD Cartwright, LM Pote, VS Blazer, WB Schill. 2008. Morphology and 18S rDNA of Henneguya gurlei (Myxosporea) from Ameiurus nebulosus (Siluriformes) in North Carolina, USA. Journal of Parasitology. 94: 46-57.
Blazer, VS, LR Iwanowicz, DD Iwanowicz, DR Smith, JA Young, J Hedrick, SW Foster, SJ 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, LR, AR Griffin, DD Cartwright, VS 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, LR, DT Lerner, VS Blazer and SD 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.
Iwanowicz, L, C Densmore and C Ottinger. 2004. Calcein AM released-based cytotoxic cell assay for fish leucocytes. Fish & Shellfish Immunology 16: 127 - 137.
Densmore, C, CA Ottinger, VS Blazer LR Iwanowicz and DR 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.
McIntire, M, LR Iwanowicz and AE 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.
Iwanowicz, LR and AE Goodwin. 2002. Characterization of a new bacilliform fathead minnow rhabdovirus that produces syncytia in tissue culture. Archives of Virology 147: 889 – 916.
Iwanowicz, LR, AE Goodwin and J Harshbarger. 2001. Embryonal rhabdomyosarcoma of the giant gourami, Colisa fasciata (Bloch & Schneider). Journal of Fish Diseases 24:177-179.
Iwanowicz, LR, AE 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.
Genome Announcements
Blake, L, A. C. Phillips-Savage, E. Soto, C. Oura, A. Brown-Jordan, C.D. Raines, C.B. Buck and L.R. Iwanowicz. 2024. Complete genome sequence of a novel papillomavirus in Siamese fighting fish (Betta splendens) from Trinidad and Tobago. Microbiology Resource Announcements. 13(3): e0099923.
Iwanowicz, L. R., Blazer, V. S., Jones, T., Bodnar, M., Eckstrom, K., Dragon, J. A., and Emerson, P. 2022. Draft Genome Sequence of a Novel Calicivirus from a Brown Bullhead (Ameiurus nebulosus) from Lake Memphremagog, Vermont/Quebec: Microbiology Resource Announcements. 11(3): e01188
Adams, CR, VS Blazer, RS. Cornman, J Sherry, and LR Iwanowicz*. 2021. Complete Genome Sequences of White Sucker Hepatitis B Viruses from liver tissue and plasma of white sucker, Catostomus commersonii, from the Great Lakes Region and Alberta, Canada. Microbiology Resource Announcements. 0;e01425-20.
Iwanowicz, LR, KT Young, CR Adams, VS Blazer, GD Smith and RS Cornman. 2019. Draft genome of an adomavirus associated with raised mucoid lesions on smallmouth bass. Microbial Resource Announcements. 9(14): e01479.
Iwanowicz, L.R., D.D. Iwanowicz, C.R. Adams, H. Galbraith, A. Aunins and R.S. Cornman. 2017. Draft Genome of a Picorna-Like Virus Associated with Gill Tissue in Clinically Normal Brook Trout, Salvelinus fontinalis. Genome Announcements. 5: e01022-17.
Iwanowicz, L.R., D.D. Iwanowicz, C.R. Adams, T. D. Lewis, T. M. Brandt, R.S. Cornman and L. Sanders. 2016. Complete Genome of a Novel Aquareovirus That Infects the Endangered Fountain Darter, Etheostoma fonticola). Genome Announcements. 4(6): e01405-16.
Book Chapters
Iwanowicz, L.R. and C.A. Ottinger. 2008. Estrogens, estrogen receptors and their role as immunoregulators in fish. In: “Fish Defenses” Volume 1: Immunology. Chapter 13, pp 277-322.
