Research Project: Identifying, Quantifying and Tracking Microbial Contaminants, Antibiotics and Antibiotic Resistance Genes in Order to Protect Food and Water Supplies

Location: Agricultural Water Efficiency and Salinity Research Unit

Publications (Clicking on the reprint icon will take you to the publication reprint.)

Persistence of E. coli O157:H7 in Frozen Soils: Role of Freezing Temperature - (Peer Reviewed Journal)
Wang, J., Liao, J., Ma, J., Lyu, G., Yang, X., Ibekwe, A.M., Ma, J. 2023. Persistence of E. coli O157:H7 in Frozen Soils: Role of Freezing Temperature. Science of the Total Environment. 15(17):13249. https://doi.org/10.3390/su151713249.

Significance of non-DLVO interactions on the co-transport of functionalized multiwalled carbon nanotubes and soil nanoparticles in porous media - (Peer Reviewed Journal)
Zhang, M., Bradford, S.A., Klumpp, E., Šimunek, J., Wang, S., Wan, Q., Jin, C., Qiu, R. 2022. Significance of non-DLVO interactions on the co-transport of functionalized multiwalled carbon nanotubes and soil nanoparticles in porous media. Environmental Science and Technology. https://doi.org/10.1021/acs.est.2c00681.

Prevalence of antibiotic resistance genes in pharmaceutical wastewaters - (Peer Reviewed Journal)
Obayiuwana, A., Ogunjobi, A., Ibekwe, A.M. 2021. Prevalence of antibiotic resistance genes in pharmaceutical wastewaters. Water. 13(13). Article 1731. https://doi.org/10.3390/w13131731.

Influence of seasonal changes and salinity on spinach phyllosphere bacterial functional assemblage - (Peer Reviewed Journal)
Ibekwe, A.M., Ors, S., Ferreira, J.F., Liu, X., Suarez, D.L. 2021. Influence of seasonal changes and salinity on spinach phyllosphere bacterial functional assemblage. PLoS ONE. 16(6). Article e0252242. https://doi.org/10.1371/journal.pone.0252242.

Diversity of Plasmids and Genes Encoding Resistance to Extended-Spectrum ß-Lactamase in Escherichia coli from Different Animal Sources - (Peer Reviewed Journal)
Ibekwe, A.M., Durso, L.M., Ducey, T.F., Oladeinde, A., Jackson, C.R., Frye, J.G., Dungan, R.S., Moorman, T.B., Brooks, J.P., Obayiuwana, A., Karathia, H., Fanelli, B., Hasan, N.A. 2021. Diversity of plasmids and genes encoding resistance to extended-spectrum ß-Lactamase in Escherichia coli from different animal sources. Microorganisms. 9(5). Article 1057. https://doi.org/10.3390/microorganisms9051057.

Colloid interaction energies for surfaces with steric effects and incompressible and/or compressible roughness - (Peer Reviewed Journal)
Bradford, S.A., Sasidharan, S., Kim, H., Gomez-Flores, A., Li, T., Shen, C. 2021. Colloid interaction energies for surfaces with steric effects and incompressible and/or compressible roughness. Langmuir. 37(4):1501-1510. https://doi.org/10.1021/acs.langmuir.0c03029.

Comparative use of quantitative PCR (qPCR), droplet digital PCR (ddPCR) and Recombinase Polymerase Amplification (RPA) in detection of Shiga Toxin-producing E. coli (STEC) in environmental samples - (Peer Reviewed Journal)
Ibekwe, A.M., Murinda, S.E., Park, S., Obayiuwana, A., Murry, M.A., Shwartz, G., Lundquist, T. 2020. Comparative use of quantitative PCR (qPCR), droplet digital PCR (ddPCR) and Recombinase Polymerase Amplification (RPA) in detection of Shiga Toxin-producing E. coli (STEC) in environmental samples. Water. 12(2). Article 3507. https://doi.org/10.3390/w12123507.

Persistence of Salmonella Typhimurium in apple-pear (Pyrus bretschneideri Rehd.) orchard soils influenced by bacterial communities and soil properties - (Peer Reviewed Journal)
Liao, J., Li, J., Han, Z., Lyu, G., Ibekwe, A.M., Ma, J. 2021. Persistence of Salmonella Typhimurium in apple-pear (Pyrus bretschneideri Rehd.) orchard soils influenced by bacterial communities and soil properties. Science of the Total Environment. 768. Article 144458. https://doi.org/10.1016/j.scitotenv.2020.144458.

Utilization of semi-continuous algae culture for the treatment of recycled dairy lagoon wash water - (Peer Reviewed Journal)
Schwartz, G., Ibekwe, A.M., Lundquist, T., Murinda, S., Murry, M.A. 2021. Utilization of semi-continuous algae culture for the treatment of recycled dairy lagoon wash water. Current Biochemical Engineering. 7(1):72-82. https://doi.org/10.2174/2212711907666210622153521.

Impact of phosphate adsorption on the mobility of PANI-supported nano zero-valent iron - (Peer Reviewed Journal)
Lin, D., Bradford, S.A., Hu, L., Lo, I. 2021. Impact of phosphate adsorption on the mobility of PANI-supported nano zero-valent iron. Vadose Zone Journal. 20(2). Article e20091. https://doi.org/10.1002/vzj2.20091.

Soil salinity, pH, and indigenous bacterial community interactively influence the survival of E. coli O157:H7 revealed by multivariate statistics - (Peer Reviewed Journal)
Ziming, H., Ma, J., Yang, C., Ibekwe, A.M. 2020. Soil salinity, pH, and indigenous bacterial community interactively influence the survival of E. coli O157:H7 revealed by multivariate statistics. Environmental Science and Pollution Research. 28:5575-5586. https://doi.org/10.1007/s11356-020-10942-6.

Antibiotic resistance genes occurrence in wastewaters from selected pharmaceutical facilities in Nigeria - (Peer Reviewed Journal)
Obayiuwana, A., Ibekwe, A.M. 2020. Antibiotic resistance genes occurrence in wastewaters from selected pharmaceutical facilities in Nigeria. Water. 12(7). Article 1897. https://doi.org/10.3390/w12071897.

System of multi-layered environmental media for the removal of antibiotics from wastewater - (Peer Reviewed Journal)
Ashworth, D.J., Ibekwe, A.M. 2020. System of multi-layered environmental media for the removal of antibiotics from wastewater. Journal of Environmental Chemical Engineering. 8(5). https://doi.org/10.1016/j.jece.2020.104206.

The conjugation window in an Escherichia coli K-12 strain with an IncFII plasmid - (Peer Reviewed Journal)
Headd, B.J., Bradford, S.A. 2020. The conjugation window in an Escherichia coli K-12 strain with an IncFII plasmid. Applied and Environmental Microbiology. 86(17). Article e00948-20. https://doi.org/10.1128/AEM.00948-20.

Synergies of surface roughness and hydration on colloid detachment in saturated porous media: Column and atomic force microscopy studies - (Peer Reviewed Journal)
Li, T., Shen, C., Wu, S., Jin, C., Bradford, S.A. 2020. Synergies of surface roughness and hydration on colloid detachment in saturated porous media: Column and atomic force microscopy studies. Water Research. 183. https://doi.org/10.1016/j.watres.2020.116068.

Particle-bubble interaction energies for particles with physical and chemical heterogeneities - (Peer Reviewed Journal)
Gomez-Flores, A., Bradford, S.A., Hwang, G., Heyes, G.W., Kim, H. 2020. Particle-bubble interaction energies for particles with physical and chemical heterogeneities. Minerals Engineering. 155. https://doi.org/10.1016/j.mineng.2020.106472.

Shape and orientation of bare silica particles influence their deposition under intermediate ionic strength: A study with QCM–D and DLVO theory - (Peer Reviewed Journal)
Gomez-Flores, A., Bradford, S.A., Hwang, G., Choi, S., Tong, M., Kim, H. 2020. Shape and orientation of bare silica particles influence their deposition under intermediate ionic strength: A study with QCM–D and DLVO theory. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 599. https://doi.org/10.1016/j.colsurfa.2020.124921.

Functional relationships between aboveground and belowground spinach (Spinacia oleracea L., cv. Racoon) microbiomes impacted by salinity and drought - (Peer Reviewed Journal)
Ibekwe, A.M., Ors, S., Ferreira, J.F., Liu, X., Suarez, D.L., Ma, J., Ghasemimianaei, A., Yang, C. 2020. Functional relationships between aboveground and belowground spinach (Spinacia oleracea L., cv. Racoon) microbiomes impacted by salinity and drought. Science of the Total Environment. 717. https://doi.org/10.1016/j.scitotenv.2020.137207.

Evidence for the critical role of nanoscale surface roughness on the retention and release of silver nanoparticles in porous media - (Peer Reviewed Journal)
Liang, Y., Zhou, J., Dong, Y., Klumpp, E., Simunek, J., Bradford, S.A. 2020. Evidence for the critical role of nanoscale surface roughness on the retention and release of silver nanoparticles in porous media. Environmental Pollution. 258. https://doi.org/10.1016/j.envpol.2019.113803.

Linking microbial community composition in treated wastewater with water quality in distribution systems and subsequent health effects - (Peer Reviewed Journal)
Ibekwe, A.M., Murinda, S.E. 2019. Linking microbial community composition in treated wastewater with water quality in distribution systems and subsequent health effects. Microorganisms. 7(12). https://doi.org/10.3390/microorganisms7120660.

Tricarboxylic Acid (TCA) Cycle Enzymes and Intermediates Modulate Intracellular Cyclic di-GMP Levels and the Production of Plant Cell Wall–Degrading Enzymes in Soft Rot Pathogen Dickeya dadantii - (Peer Reviewed Journal)
Yuan, X., Zeng, Q., Xu, J., Severin, G.B., Zhou, X., Waters, C.M., Ibekwe, A.M., Liu, F., Yang, C. 2020. Systematic study of the TCA cycle in virulence regulation links cyclic di-GMP signaling in Dickeya dadantii. Molecular Plant-Microbe Interactions. 33(2):296-307. https://doi.org/10.1094/MPMI-07-19-0203-R.

Transport and retention of engineered silver nanoparticles in carbonate-rich sediments in the presence and absence of soil organic matter - (Peer Reviewed Journal)
Adrian, Y.F., Schneidewind, U., Bradford, S.A., Simunek, J., Klumpp, E., Azzam, R. 2019. Transport and retention of engineered silver nanoparticles in carbonate-rich sediments in the presence and absence of soil organic matter. Environmental Pollution. 255. https://doi.org/10.1016/j.envpol.2019.113124.

Interaction energies for hollow and solid cylinders: Role of aspect ratio and particle orientation - (Peer Reviewed Journal)
Gomez-Flores, A., Bradford, S.A., Wu, L., Kim, H. 2019. Interaction energies for hollow and solid cylinders: Role of aspect ratio and particle orientation. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 580. https://doi.org/10.1016/j.colsurfa.2019.123781.

Nano-bubble retention in saturated porous media under repulsive van der waals and electrostatic conditions - (Peer Reviewed Journal)
Hamamoto, S., Sugimoto, T., Takemura, T., Nishimura, T., Bradford, S.A. 2019. Nano-bubble retention in saturated porous media under repulsive van der waals and electrostatic conditions. Langmuir. 35(21):6853-6860. https://doi.org/10.1021/acs.langmuir.9b00507.

A feed-forward signalling circuit controls bacterial virulence through linking cyclic di-GMP and two mechanistically distinct sRNAs, ArcZ and RsmB - (Peer Reviewed Journal)
Yuan, X., Zeng, Q., Khokhani, D., Tian, F., Severin, G.B., Waters, C.M., Xu, J., Zhou, X., Sundin, G.W., Ibekwe, A.M., Liu, F., Yang, C. 2019. A feed-forward signalling circuit controls bacterial virulence through linking cyclic di-GMP and two mechanistically distinct sRNAs, ArcZ and RsmB. Environmental Microbiology. https://doi.org/10.1111/1462-2920.14603.

Shiga Toxin-producing Escherichia coli in Mastitis: An international perspective - (Peer Reviewed Journal)
Murinda, S.E., Ibekwe, A.M., Rodriguez, N.G., Quiroz, K.L., Mujica, A.P., Osmon, K. 2019. Shiga Toxin-producing Escherichia coli in Mastitis: An international perspective. Foodborne Pathogens and Disease. 16(4):229-243. https://doi.org/10.1089/fpd.2018.2491.

Transport of biochar colloids in saturated porous media in the presence of humic substances or proteins - (Peer Reviewed Journal)
Yang, W., Bradford, S.A., Yang, W., Sharma, P., Shang, J., Li, B. 2018. Transport of biochar colloids in saturated porous media in the presence of humic substances or proteins. Environmental Pollution. 246:855-863. https://doi.org/10.1016/j.envpol.2018.12.075.

Mechanisms of graphene oxide aggregation, retention, and release in quartz sand - (Peer Reviewed Journal)
Liang, Y., Bradford, S.A., Simunek, J., Klumpp, E. 2018. Mechanisms of graphene oxide aggregation, retention, and release in quartz sand. Science of the Total Environment. 656:70-79. https://doi.org/10.1016/j.scitotenv.2018.11.258.

Application of depletion attraction in mineral flotation: II. Effects of depletant concentration - (Peer Reviewed Journal)
Kim, G., Choi, J., Choi, S., Kim, K., Han, Y., Bradford, S.A., Choi, S.Q., Kim, H. 2018. Application of depletion attraction in mineral flotation: II. Effects of depletant concentration. Minerals. 8(10):450. https://doi.org/10.3390/min8100450.

Application of depletion attraction in mineral flotation: I. Theory - (Peer Reviewed Journal)
Choi, J., Kim, G., Choi, S., Kim, K., Han, Y., Bradford, S.A., Choi, S.Q., Kim, H. 2018. Application of depletion attraction in mineral flotation: I. Theory. Minerals. 8(10):451. https://doi.org/10.3390/min8100451.

DLVO Interaction energies for hollow particles: The filling matters - (Peer Reviewed Journal)
Shen, C., Bradford, S.A., Flury, M., Huang, Y., Wang, Z., Li, B. 2018. DLVO Interaction energies for hollow particles: The filling matters. Langmuir. 34(43):12764-12775. https://doi.org/10.1021/acs.langmuir.8b02547.

Physicochemical factors that favor conjugation of an antibiotic resistant plasmid in non-growing bacterial cultures in the absence and presence of antibiotics - (Peer Reviewed Journal)
Headd, B.J., Bradford, S.A. 2018. Physicochemical factors that favor conjugation of an antibiotic resistant plasmid in non-growing bacterial cultures in the absence and presence of antibiotics. Frontiers in Microbiology. 9:2122. https://doi.org/10.3389/fmicb.2018.02122.

Continuous flow-constructed wetlands for the treatment of swine waste water - (Peer Reviewed Journal)
Ibekwe, A.M., Murinda, S.E. 2018. Continuous flow-constructed wetlands for the treatment of swine waste water. International Journal of Environmental Research and Public Health. 15(7):1369. https://doi.org/10.3390/ijerph15071369.

Characterization of bacterial communities and their antibiotic resistance profiles in wastewaters obtained from pharmaceutical facilities in Lagos and Ogun States, Nigeria - (Peer Reviewed Journal)
Obayiuwana, A., Ogunjobi, A., Yang, M., Ibekwe, A.M. 2018. Characterization of bacterial communities and their antibiotic resistance profiles in wastewaters obtained from pharmaceutical facilities in Lagos and Ogun States, Nigeria. International Journal of Environmental Research and Public Health. 15(7):1365. https://doi.org/10.3390/ijerph15071365.

Analysis of stability behavior of carbon black nanoparticles in ecotoxicological media: Hydrophobic and steric effects - (Peer Reviewed Journal)
Hwang, G., Gomez-Florez, A., Bradford, S.A., Choi, S., Jo, E., Kim, S.B., Tong, M., Kim, H. 2018. Analysis of stability behavior of carbon black nanoparticles in ecotoxicological media: Hydrophobic and steric effects. Colloids and Surfaces A: Physicochemical and Engineering Aspects. 554:306-316. https://doi.org/10.1016/j.colsurfa.2018.06.049.

Can nanoscale surface charge heterogeneity really explain colloid detachment from primary minima upon reduction of solution ionic strength? - (Peer Reviewed Journal)
Shen, C., Bradford, S.A., Li, T., Li, B., Huang, Y. 2018. Can nanoscale surface charge heterogeneity really explain colloid detachment from primary minima upon reduction of solution ionic strength? Journal of Nanoparticle Research. 20:165. https://doi.org/10.1007/s11051-018-4265-8.

Comparison of types and amounts of nanoscale heterogeneity on bacteria retention - (Peer Reviewed Journal)
Bradford, S.A., Sasidharan, S., Kim, H., Hwang, G. 2018. Comparison of types and amounts of nanoscale heterogeneity on bacteria retention. Frontiers in Environmental Science. 6:56. https://doi.org/10.3389/fenvs.2018.00056.

Transport and fate of viruses in sediment and stormwater from a managed aquifer recharge site - (Peer Reviewed Journal)
Sasidharan, S., Bradford, S.A., Simunek, J., Torkzaban, S., Vanderzalm, J. 2017. Transport and fate of viruses in sediment and stormwater from a managed aquifer recharge site. Journal of Hydrology. 555:724-735. https://doi.org/10.1016/j.jhydrol.2017.10.062.

Contributions of nanoscale roughness to anomalous colloid retention and stability behavior - (Abstract Only)

Evaluating drywells for stormwater management and enhanced aquifer recharge - (Abstract Only)

Impact of treated wastewater for irrigation on soil microbial communities - (Peer Reviewed Journal)
Ibekwe, A.M., Gonzalez-Rubio, A., Suarez, D.L. 2017. Impact of treated wastewater for irrigation on soil microbial communities. Science of the Total Environment. 622:1603-1610. https://doi.org/10.1016/j.scitotenv.2017.10.039.

DLVO interaction energies between hollow spherical particles and collector surfaces - (Peer Reviewed Journal)
Shen, C., Bradford, S.A., Wang, Z., Huang, Y., Zhang, Y., Li, B. 2017. DLVO interaction energies between hollow spherical particles and collector surfaces. Langmuir. 33:10455-10467. http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b02383.

Analysis of the effects of natural organic matter in zinc beneficiation - (Peer Reviewed Journal)
Silva, R.A., Borja, D., Hwang, G., Hong, G., Gupta, V., Bradford, S.A., Zhang, Y., Kim, H. 2017. Analysis of the effects of natural organic matter in zinc beneficiation. Journal of Cleaner Production. 168:814-822. https://doi.org/10.1016/j.jclepro.2017.09.011.

Contributions of nanoscale roughness to anomalous colloid retention and stability behavior - (Peer Reviewed Journal)
Bradford, S.A., Kim, H., Shen, C., Sasidharan, S., Shang, J. 2017. Contributions of nanoscale roughness to anomalous colloid retention and stability behavior. Langmuir. 33:10094-10105. http://pubs.acs.org/doi/abs/10.1021/acs.langmuir.7b02445.

Unraveling complexities of velocity dependent retention and release parameters for E. coli in saturated porous media - (Peer Reviewed Journal)
Sasidharan, S., Bradford, S.A., Torkzaban, S., Ye, X., Vanderzalm, J., Du, X., Page, D. 2017. Unraveling complexities of velocity dependent retention and release parameters for E. coli in saturated porous media. Science of the Total Environment. 603:406-415. doi: 10.1016/j.scitotenv.2017.06.091.

Microbial diversity of bacteria, archaea, and fungi communities in a continuous flow constructed wetland for the treatment of swine waste - (Peer Reviewed Journal)
Ibekwe, A.M., Ma, J., Murinda, S., Reddy, G.B. 2017. Microbial diversity of bacteria, archaea, and fungi communities in a continuous flow constructed wetland for the treatment of swine waste. Hydrology: Current Research. 8(2):1-8. doi: 10.4172/2157-7587.1000277.