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  1. Zhang, L., J. R. Yaron, A. M. Tafoya, S. E. Wallace, J. Kilbourne, S. E. Haydel, K. Rege, G. McFadden, A. R. Lucas. 2019. A virus-derived immune modulating SERPIN accelerates wound closure and reduces scar formation. Journal of Clinical Medicine. 8:1626.
  2. Mo, M., Y. Yang, F. Zhang, W. Jing, R. Iriya, J. Popovich, S. Wang, T. Grys, S. E. Haydel, N Tao. 2019. Rapid antimicrobial susceptibility testing of patient urine samples using large volume free-solution light scattering microscopy. Analytical Chemistry 91:10164-10171. 


  1. Chen, S., J. Popovich, J., W. Zhang, C. Ganser, S. E. Haydel, D.-K. Seo. 2018. Superior ion release properties and antibacterial efficacy of nanostructured zeolites ion-exchanged with zinc, copper, and iron. RSC Advances 8:37949-37957.
  2. Maarsingh, J. D., S. E. Haydel. 2018. Mycobacterium smegmatis PrrAB two-component system influences triacylglycerol accumulation during ammonium stress. Microbiology 164:1276-1288. 
  3. Yu, H., W. Jing, R. Iriya, Y. Yang, K. Syal, M. Mo, T. E. Grys, S. E. Haydel, S. Wang, N. Tao. 2018. Phenotypic antimicrobial susceptibility testing with deep learning video microscopy. Analytical Chemistry 90:6314-6322.
  4. Popovich, J., M. Stephens, H. Celaya, S. Suwarno, S. Barclay, E. Yee, D. A. Dean, M. Farris, S. E. Haydel. 2018. Building and breaking the cell wall in four acts: a kinesthetic and tactile exercise for teaching beta-lactam antibiotic mechanism of action and resistance. Journal of Microbiology and Biology Education 19:1462-1468. 


  1. Iriya, R., K. Syal, W. Jing, M. Mo, H. Yu, S. E. Haydel, S. Wang, and N. Tao. 2017. Real-time detection of antibiotic action by measuring nanometer-scale bacterial membrane deformation. Journal of Biomedical Optics 22:126002. 
  2. Chen, S., J. Popovich, J., N. Iannuzo, S. E. Haydel, D.-K. Seo. 2017. Antibacterial nanostructured silver zeolite X with superior ion release kinetics and efficacy against methicillin-resistant Staphylococcus aureus. ACS Applied Materials & Interfaces. 9:39271-3928.  
  3. Syal, K., S. Shen, Y. Yang, S. Wang, S. E. Haydel, N. Tao. 2017. Rapid antibiotic susceptibility testing of uropathogenic E. coli by tracking sub-micron scale motion of single bacterial cells. ACS Sensors. 2:1231-1239.  
  4. Syal, K., M. Mo, H. Yu, R. Iriya, W. Jing, S. Guondong, S. Wang, T. E. Grys, S. E. Haydel, N. Tao. 2017. Current and emerging techniques for antibiotic susceptibility tests. Theranostics. 7:1795-1805


  1. X. Wang, W. Xu, P. Chatterjee, C. Lv, J. Popovich, Z. Song, L. Dai, M. Y. S. Kalani, S. E. Haydel, H. Jiang. 2016. Food-materials-based edible supercapacitors. Advanced Materials Technologies. 1600059 (1-7).  
  2. Adusumilli, S., S. E. Haydel. 2016. In vitro antibacterial activity and in vivo efficacy of hydrated clays on Mycobacterium ulcerans growth. BMC Complementary and Alternative Medicine. 16:40.
  3. Syal, K., R. Iriya, Y. Yang, H. Yu, S. Wang, S. E. Haydel, H.-Y. Chen, N. Tao. 2016. Antibiotic susceptibility test with plasmonic imaging and tracking of single bacterial motions on nanometer scale. ACS Nano 10:845-852.  
  4. Otto, C. C., J. Kilbourne, S. E. Haydel. 2016. Natural and ion-exchanged illite clays reduce bacterial burden and inflammation in cutaneous methicillin-resistant Staphylococcus aureus infections in mice. Journal of Medical Microbiology. 65:19-27.


  1. Haydel, S. E., V. Stout. 2015. A kinesthetic modeling activity to teach PCR fundamentals. CourseSource 2:1-11. 


  1. Otto, C. C., J. L. Koehl, D. Solanky, S. E. Haydel. 2014. Metal ions, not metal-catalyzed oxidative stress, cause clay leachate antibacterial activity. PLoS ONE 9(12):e115172 (21 pages). PMCID: PMC4263752.  


  1. Otto, C. C., S. E. Haydel. 2013. Microbicidal clays: composition, activity, mechanism of action, and therapeutic applications. A. Méndez-Vilas, ed. In: Microbial pathogens and strategies for combating them: science, technology and education. Badajoz, Spain: Formatex Research Center. 2:1169-1180. 
  2. Otto, C. C., S. E. Haydel. 2013. Exchangeable ions are responsible for the in vitro antibacterial properties of natural clay mixtures. PLoS ONE 8(5): e64068 (9 pages). PMCID: PMC3656846.  


  1. Solanky, D. and S. E. Haydel. 2012. Adaptation of the neutral bacterial comet assay to assess antimicrobial-mediated DNA double-strand breaks in Escherichia coli. Journal of Microbiological Methods. 91:257-261.
  2. Haydel, S. E., V. Malhotra, G. L. Cornelison, and J. E. Clark-Curtiss. 2012. The prrAB two-component system is essential for Mycobacterium tuberculosis viability and is induced during nitrogen-limiting conditions. Journal of Bacteriology. 194:354-361.


  1. Pang, X., G. Cao, P. F. Neuenschwander, S. E. Haydel, G. Hou, and S. T. Howard. 2011. The b-propeller gene Rv1057 of Mycobacterium tuberculosis has a complex promoter directly regulated by both the MprAB and TrcRS two-component systems. Tuberculosis (Edinb). 91:S142-S149.
  2. Otto, C. C. and S. E. Haydel. 2011. Morphology of mature Mycobacterium ulcerans colonies. ASM MicrobeLibrary 2.0.
  3. R. Treuer and S. E. Haydel. 2011. Acid-fast staining and Petroff Hausser chamber counting of mycobacterial cells in liquid suspension. Current Protocols in Microbiology. 20:10A.6.1-10A.6.6. DOI: 10.1002/9780471729259.mc10a06s20.


  1. Otto, C. C., T. M. Cunningham, M. R. Hansen, S. E. Haydel. 2010. Effects of antibacterial mineral leachates on the cellular ultrastructure, morphology, and membrane integrity of Escherichia coli and methicillin-resistant Staphylococcus aureus. Annals of Clinical Microbiology and Antimicrobials. 9:26 (13 pages).
  2. S. E. Haydel. 2010. Extensively drug-resistant tuberculosis: a sign of the times and an impetus for antimicrobial discovery. Pharmaceuticals 3:2268-2290.
  3. Cunningham, T. M., J. L. Koehl, J. S. Summers, and S. E. Haydel. 2010. pH-dependent metal ion toxicity influences the antibacterial activity of two natural mineral mixtures. PLoS ONE 5(3):e9456 (9 pages). doi:10.1371/journal.pone.0009456
  4. Williams, L. B. and S. E. Haydel. 2010. Evaluation of the medicinal use of clay minerals as antibacterial agents. International Geology Review 52:745-770.


Williams, L. B., S. E. Haydel, R. E. Ferrell. 2009. Bentonite, bandaids, and borborygmi. Elements 5:99-105.


  1. Williams, L. B., S. E. Haydel, R. F. Giese, Jr., D. D. Eberl. 2008. Chemical and mineralogical characteristics of French green clays used for healing. Clays and Clay Minerals 56:437-452.
  2. Haydel, S. E., C. M. Remenih, L. B. Williams. 2008. Broad-spectrum in vitro antibacterial activities of clay minerals against antibiotic-susceptible and antibiotic-resistant bacterial pathogens. Journal of Antimicrobial Chemotherapy 61:353-361.


Haydel, S. E. and J. E. Clark-Curtiss. 2006. The Mycobacterium tuberculosis TrcR response regulator represses transcription of the intracellularly-expressed Rv1057 gene, encoding a seven-bladed β-propeller. Journal of Bacteriology 188:150-159.


Haydel, S. E. and J. E. Clark-Curtiss. 2004. Global expression analysis of two-component system regulators during Mycobacterium tuberculosis growth in human macrophages. FEMS Microbiology Letters 236:341-347.


Clark-Curtiss, J. E. and S. E. Haydel. 2003. Molecular genetics of Mycobacterium tuberculosis pathogenesis. Annual Review of Microbiology 57:517-549.


Haydel, S. E., W. H. Benjamin, Jr., N. E. Dunlap, J. E. Clark-Curtiss. 2002. Expression, autoregulation, and DNA binding properties of the Mycobacterium tuberculosis TrcR response regulator. Journal of Bacteriology 184:2192-2203.


Haydel, S. E., N. E. Dunlap, W. H. Benjamin, Jr. 1999. In vitro evidence of two-component system phosphorylation between the Mycobacterium tuberculosis TrcR/TrcS proteins. Microbial Pathogenesis 26:195-206.