Donald Tillitt, PhD (Former Employee)
Science and Products
Filter Total Items: 215
Quantitative polymerase chain reaction (PCR) assays for a bacterial thiaminase I gene and the thiaminase-producing bacterium Paenibacillus thiaminolyticus. Quantitative polymerase chain reaction (PCR) assays for a bacterial thiaminase I gene and the thiaminase-producing bacterium Paenibacillus thiaminolyticus.
The thiaminase I enzyme produced by the gram-positive bacterium Paenibacillus thiaminolyticus isolated from the viscera of Lake Michigan alewives Alosa pseudoharengus is currently the only defined source of the thiaminase activity linked to thiamine (vitamin B1) deficiency in early mortality syndrome (EMS) in the larvae of Great Lakes salmonines. Diets of alewife or isolated strains of P
Authors
C.A. Richter, Maureen K. Wright-Osment, J.L. Zajicek, D. C. Honeyfield, D. E. Tillitt
Behavioral response and kinetics of terrestrial atrazine exposure in American toads (bufo americanus) Behavioral response and kinetics of terrestrial atrazine exposure in American toads (bufo americanus)
Amphibians in terrestrial environments obtain water through a highly vascularized pelvic patch of skin. Chemicals can also be exchanged across this patch. Atrazine (ATZ), a widespread herbicide, continues to be a concern among amphibian ecologists based on potential exposure and toxicity. Few studies have examined its impact on the terrestrial juvenile or adult stages of toads. In the...
Authors
Mendez Storrs, D. E. Tillitt, T.A.G. Rittenhouse, R. D. Semlitsch
Dreissenid mussels from the Great Lakes contain elevated thiaminase activity Dreissenid mussels from the Great Lakes contain elevated thiaminase activity
We examined thiaminase activity in dreissenid mussels collected at different depths and seasons, and from various locations in Lakes Michigan, Ontario, and Huron. Here we present evidence that two dreissenid mussel species (Dreissena bugensis and D. polymorpha) contain thiaminase activity that is 5-100 fold greater than observed in Great Lakes fishes. Thiaminase activity in zebra mussels...
Authors
D. E. Tillitt, S.C. Riley, A.N. Evans, S. J. Nichols, J.L. Zajicek, J. Rinchard, C.A. Richter, C.C. Krueger
The genomic transcriptional response of female fathead minnows (Pimephales promelas) to an acute exposure to the androgen, 17β-trenbolone The genomic transcriptional response of female fathead minnows (Pimephales promelas) to an acute exposure to the androgen, 17β-trenbolone
We investigated the genomic transcriptional response of female fathead minnows (Pimephales promelas) to an acute (4 days) exposure to 0.1 or 1.0 ??g/L of 17??-trenbolone (TB), the active metabolite of an anabolic androgenic steroid used as a growth promoter in cattle and a contaminant of concern in aquatic systems. Our objectives were to investigate the gene expression profile induced by...
Authors
Jennifer Dorts, Cathy A. Richter, Maureen K. Wright-Osment, Mark R. Ellersieck, Barbara J. Carter, Donald E. Tillitt
Thiamine deficiency effects on the vision and foraging ability of lake trout fry Thiamine deficiency effects on the vision and foraging ability of lake trout fry
The exact causes of the historical recruitment failures of Great Lakes lake trout Salvelinus namaycush are unknown. Thiamine deficiency has been associated with neurological abnormalities in lake trout that lead to early mortality syndrome (EMS) in salmonine swim-up fry, and EMS-related mortality at the swim-up stage is a factor that contributes to the reproductive failure of lake trout
Authors
Donald E. Tillitt, James L. Zajicek, Rachel Claunch, Dale C. Honeyfield, John D. Fitzsimons, Scott B. Brown
Reproductive impairment of Great Lakes lake trout by dioxin-like chemicals: Chapter 21 Reproductive impairment of Great Lakes lake trout by dioxin-like chemicals: Chapter 21
No abstract available.
Authors
Donald E. Tillitt, Philip S. Cook, John P. Giesy
Science and Products
Filter Total Items: 215
Quantitative polymerase chain reaction (PCR) assays for a bacterial thiaminase I gene and the thiaminase-producing bacterium Paenibacillus thiaminolyticus. Quantitative polymerase chain reaction (PCR) assays for a bacterial thiaminase I gene and the thiaminase-producing bacterium Paenibacillus thiaminolyticus.
The thiaminase I enzyme produced by the gram-positive bacterium Paenibacillus thiaminolyticus isolated from the viscera of Lake Michigan alewives Alosa pseudoharengus is currently the only defined source of the thiaminase activity linked to thiamine (vitamin B1) deficiency in early mortality syndrome (EMS) in the larvae of Great Lakes salmonines. Diets of alewife or isolated strains of P
Authors
C.A. Richter, Maureen K. Wright-Osment, J.L. Zajicek, D. C. Honeyfield, D. E. Tillitt
Behavioral response and kinetics of terrestrial atrazine exposure in American toads (bufo americanus) Behavioral response and kinetics of terrestrial atrazine exposure in American toads (bufo americanus)
Amphibians in terrestrial environments obtain water through a highly vascularized pelvic patch of skin. Chemicals can also be exchanged across this patch. Atrazine (ATZ), a widespread herbicide, continues to be a concern among amphibian ecologists based on potential exposure and toxicity. Few studies have examined its impact on the terrestrial juvenile or adult stages of toads. In the...
Authors
Mendez Storrs, D. E. Tillitt, T.A.G. Rittenhouse, R. D. Semlitsch
Dreissenid mussels from the Great Lakes contain elevated thiaminase activity Dreissenid mussels from the Great Lakes contain elevated thiaminase activity
We examined thiaminase activity in dreissenid mussels collected at different depths and seasons, and from various locations in Lakes Michigan, Ontario, and Huron. Here we present evidence that two dreissenid mussel species (Dreissena bugensis and D. polymorpha) contain thiaminase activity that is 5-100 fold greater than observed in Great Lakes fishes. Thiaminase activity in zebra mussels...
Authors
D. E. Tillitt, S.C. Riley, A.N. Evans, S. J. Nichols, J.L. Zajicek, J. Rinchard, C.A. Richter, C.C. Krueger
The genomic transcriptional response of female fathead minnows (Pimephales promelas) to an acute exposure to the androgen, 17β-trenbolone The genomic transcriptional response of female fathead minnows (Pimephales promelas) to an acute exposure to the androgen, 17β-trenbolone
We investigated the genomic transcriptional response of female fathead minnows (Pimephales promelas) to an acute (4 days) exposure to 0.1 or 1.0 ??g/L of 17??-trenbolone (TB), the active metabolite of an anabolic androgenic steroid used as a growth promoter in cattle and a contaminant of concern in aquatic systems. Our objectives were to investigate the gene expression profile induced by...
Authors
Jennifer Dorts, Cathy A. Richter, Maureen K. Wright-Osment, Mark R. Ellersieck, Barbara J. Carter, Donald E. Tillitt
Thiamine deficiency effects on the vision and foraging ability of lake trout fry Thiamine deficiency effects on the vision and foraging ability of lake trout fry
The exact causes of the historical recruitment failures of Great Lakes lake trout Salvelinus namaycush are unknown. Thiamine deficiency has been associated with neurological abnormalities in lake trout that lead to early mortality syndrome (EMS) in salmonine swim-up fry, and EMS-related mortality at the swim-up stage is a factor that contributes to the reproductive failure of lake trout
Authors
Donald E. Tillitt, James L. Zajicek, Rachel Claunch, Dale C. Honeyfield, John D. Fitzsimons, Scott B. Brown
Reproductive impairment of Great Lakes lake trout by dioxin-like chemicals: Chapter 21 Reproductive impairment of Great Lakes lake trout by dioxin-like chemicals: Chapter 21
No abstract available.
Authors
Donald E. Tillitt, Philip S. Cook, John P. Giesy
*Disclaimer: Listing outside positions with professional scientific organizations on this Staff Profile are for informational purposes only and do not constitute an endorsement of those professional scientific organizations or their activities by the USGS, Department of the Interior, or U.S. Government