Edward G Dudley, Ph.D.
- Director of E. coli Reference Center
- Professor of Food Science
University Park, PA 16802
- Email egd100@psu.edu
- Office 814-867-0439
Areas of Expertise
- Microbiology
- Microbial pathogens
- Molecular microbiology
- Microbial genomics
- Food Safety
- Food Microbiology
Websites
Education
- Postdoctoral research, University of Maryland School of Medicine
- Ph.D., University of Wisconsin Madison, Bacteriology, 2000
- M.S., University of Wisconsin Madison, Food Science, 1994
- B.S., Penn State University, Microbiology, 1991
Other Affiliations
Molecular Cellular and Integrative Biosciences
Center for Molecular Immunology and Infectious Disease
Center for Infectious Disease Dynamics
Research Interests
My program uses molecular biology, biochemistry, and molecular biology techniques to better understand the biology and evolution of foodborne pathogens, and to develop improved methods of tracking the spread of these organisms from farm-to-fork.
Escherichia coli O157:H7 is a foodborne pathogen that causes illness through mechanisms that include the elaboration of an AB5 protein called Shiga toxin. When I joined Penn State in 2007, the research community was just beginning to use genomic techniques to define the phylogeny of global isolates and to explain the heterogeneity observed in terms of virulence potential and toxin production. I took this opportunity to develop a program investigating the factors driving differences in toxin production using whole genomic analysis (mainly in collaboration with Dr. Mark Eppinger at the University of Texas-San Antonio), investigation of polymorphisms encoded within bacteriophage that carry the Shiga toxin genes, and interactions with members of the gut microflora. Most notably, we have found that certain strains categorized as low toxin producers synthesize high levels of toxin when co-cultured with other commensal strains of E. coli. We have also shown that inoculation of mice with such co-cultures causes more serious disease than inoculation with the pathogen alone. Future work is directed at better understanding the mechanisms behind these observations.
We are proudly a member of the US Food and Drug Administration's GenomeTrakr program, representing the Commonwealth of Pennsylvania. This program is a collaboration between Penn State and the PA Department of Health. Our goal is to help populate the whole genome sequence databases with foodborne isolates, particularly E. coli and Salmonella from food and environmental sources, and to help organizations such as our Department of Health and the food industry to gain the knowledge needed to enter this field or to gain the knowledge necessary to benefit from advances in genomic sciences.
In 2007, several high profile papers described the function of elements first discovered in bacterial genomes 30 years earlier, called CRISPR (Clustered Regularly Interspaced Short Palindromic Repeats). These manuscripts and those that followed elegantly described how CRISPR is an adaptive immune system for prokaryotes designed to protect cells against foreign DNA including bacteriophage and plasmids. We were some of the first to recognize that these rapidly evolving elements could be used as molecular signatures for strain identification during foodborne outbreaks. We have studied CRISPR diversity primarily in Salmonella enterica, with additional work in Shiga toxin producing Escherichia coli. We have demonstrated their utility in molecular subtyping, and for the development of rapid methods of pathogen identification. More recent (unpublished) work has begun to elucidate the function of CRISPR in S. enterica, as it becomes more apparent that CRISPR has functions outside of those of immunity.
Research Information
Table S5.4: Rare codon tRNA usage in E. coli O157:H7 Sakai
Table S5.5: Tandem rare codons in the E. coli O157:H7 Sakai genome
Keefer, A. B.*, Xiaoli, L.*, M'ikanatha, N. M., Yao, K., Hoffmann, M., and E. G. Dudley. 2018. Retrospective whole-genome sequencing analysis distinguished PFGE and drug resistance matched retail meat and clinical Salmonella isolates. bioRxiv 356857.
Abelman, R. L., N. M. M'ikanatha, and E. G. Dudley. 2018. Whole genome sequencing of antimicrobial-resistant Shigella sonnei associated with infection acquired from international and domestic setting reveals gene allelic variants that predict global lineages. bioRxiv 361196.
Xiaoli L, H. M. Figler, K. Goswami Banerjee, C. S. Hayes, and E. G. Dudley. 2018. Non-pathogenic Escherichia coli Enhance Stx2a Production of E. coli O157:H7 Through Both bamA-Dependent and Independent Mechanisms. Front Microbiol. 9:1325.
Zhang H, E. G. Dudley, and F. Harte. 2017, Critical synergistic concentration of lecithin phospholipids improves the antimicrobial activity of eugenol against Escherichia coli. Appl Environ Microbiol. 83: e01583-17.
Yang X, E. Huang, M. Yesil, L. Xiaoli, E. G. Dudley, and A. E. Yousef AE. 2017. Draft genome sequence of Brevibacillus laterosporus OSY-I1, a strain that produces Brevibacillin, which combats drug-resistant Gram-positive bacteria. Genome Announc. 5: e01093-17.
Gerst M.M., E. G. Dudley, L. Xiaoli, and A. E. Yousef. 2017. Draft genome sequence of Bacillus velezensis GF610, a producer of potent anti-Listeria agents. Genome Announc. 5: e01046-17.
DiMarzio M, B. Rusconi, N. H. Yennawar, M. Eppinger, A. D. Patterson, and E. G. Dudley. 2017. Identification of a mouse Lactobacillus johnsonii strain with deconjugase activity against the FXR antagonist T-β-MCA. PLoS One. 12:e0183564
Zhang H, E. G. Dudley, P. M. Davidson, and F. Harte. 2017. Critical concentration of lecithin enhances the antimicrobial activity of eugenol against Escherichia coli. Appl Environ Microbiol. 83: e03467-16.
Scheinberg J.A., E. G. Dudley, J. Campbell, B. Roberts, M. DiMarzio, C. DebRoy, and C. N. Cutter. 2017. Prevalence and Phylogenetic Characterization of Escherichia coli and Hygiene Indicator Bacteria Isolated from Leafy Green Produce, Beef, and Pork Obtained from Farmers' Markets in Pennsylvania. J Food Prot. 80:237-244
Uhlich, G. A., G. C. Paoli, X. Zhang, E. G. Dudley, H. M. Figler, B. J. Cottrell, and E. Andreozzi. 2017. Whole-genome sequence of Escherichia coli serotype O157:H7 strain PA20. Genome Announc. 5:e01460-16.
Danagamage, T. N., P. Patterson, E. Wallner-Pendleton, D. Trampel, N. Shariat, E. G. Dudley, B. M. Jayarao, and S. Kariyawasam. 2016. Longitudinal monitoring of successive commercial layer flocks for Salmonella enteria serovar Enteritidis. 13:618-625
Very, K. J., M. K, Kirchner, N. Shariat, W. Cottrell, C. H. Sandt, E. G. Dudley, S. Kariyawasam, and B. M. Jayarao. 2016. Prevalence and spatial distribution of Salmonella infections in the Pennsylvania raccoon (Procyon lotor). Zoonoses Public Health 63:223-233.
Figler, H.M., and E. G. Dudley. 2016. The interplay of Escherichia coli O157:H7 and commensal E. coli: the importance of strain-level identification. Expert Rev. Gastroenterol Hepatol.10:415-417.
Valderrama, W. B., E. G. Dudley, S. Doores, and C. N. Cutter. 2016. Commercially available rapid methods for detection of selected foodborne pathogens. Crit. Rev. Food Sci. Nutr. 56:1519-1531.
Barrangou, R., and E. G. Dudley. 2016. CRISPR-based typing and next-generation tracking technologies. Ann. Rev. Food Sci. Technol. 7:395-411.
Ivanov, Y. V., N. Shariat, K. B. Register, B. Linz, I. Rivera, K. Hu, E. G. Dudley, and E. T. Harvill. 2015. A newly discovered Bordetella species carries a transcriptionally active CRISPR-Cas with a small Cas9 endonuclease. BMC Genomics 26:863.
Park, J., Y. Zhang, C. Chen, E. G. Dudley, and E. T. Harvill. 2015. Diversity of Secretion Systems Associated with Virulence Characteristics of the Classical Bordetellae. Microbiology 161:2328-2340
Yin, S., B. Rusconi, F. Sanjar, K. Goswami, L. Xiaoli, M. Eppinger, and E. G. Dudley. 2015. Escherichia coli O157:H7 strains harbor at least three distinct sequence types of Shiga toxin 2a-converting phages. BMC Genomics. 16:733.
Goswami, K., C. Chen, L. Xiaoli, K. A. Eaton, and E. G. Dudley. 2015. Co-culturing Escherichia coli O157:H7 with a non-pathogenic E. coli strain increases toxin production and virulence in a germ-free mouse model. Infect. Immun. 83:4185-4193.
Jiang, Y., S. Yin, E. G. Dudley, and C. N. Cutter. 2015. Diversity of CRISPR loci and virulence genes in pathogenic Escherichia coli isolates from various sources. Int. J. Food Microbiol. 204:41-46.
Shariat, N., R. E. Timme, J. B. Pettengill, R. Barrangou, and E. G. Dudley. 2015. Characterization and evolution of Salmonella CRISPR-cas systems. Microbiology UK. 161: 374-386.
Deng X, Shariat N, Driebe EM, Roe CC, Tolar B, Trees E, Keim P, Zhang W, Dudley EG, Fields PI, Engelthaler DM. 2015. Comparative analysis of subtyping methods against a whole-genome-sequencing standard for Salmonella enterica Serotype Enteritidis. J Clin Microbiol. 53:212-218.
Sanjar, J., T. H. Hazen, S. M. Shah, S. S. Koenig, S. Agrawal, S. Daugherty, L. Sadzewicz, L. J. Tallon, M. K. Mammel, P. Feng, R. Soderlund, P. I. Tarr, C. DebRoy, E. G. Dudley, T. A. Cebula, J. Ravel, C. M. Fraser, D. A. Rasko, and M. Eppinger. 2014. Genome sequence of Escherichia coli O157:H7 stain 2886-75, associated with the first reported case of human infection in the United States. Genome Announc. 2:e01120-13.
Shariat, N., C. H. Sandt, M. J. DiMarzio, R. Barrangou, and E. G. Dudley. 2013. CRISPR-MVLST subtyping of Salmonella enterica subsp. enterica serovars Typhimurium and Heidelberg and application in identifying outbreak isolates. BMC Microbiol. 13:254.
Shariat, N., and E. G. Dudley. 2013. CRISPRs: Molecular signatures used for pathogen subtyping. Appl. Environ. Microbiol. 80:430-439.
Shariat N., and E. G. Dudley. 2013. Where are we heading with Salmonella molecular subtyping? Future Microbiol. 8:1231–1233
Loquasto, J. R., R. Barrangou, E. G. Dudley, B. Stahl, C. Chen, and R. F. Roberts. Bifidobacterium animalis subsp. lactis ATCC 27673 is a genomically unique strain within this conserved subspecies. Appl. Environ. Microbiol. 79:6903-6910.
Yin, S., M. Jensen, J. Bai, C. DebRoy, R. Barrangou, and E. G. Dudley. Evolutionary Divergence of Shiga Toxin-producing Escherichia coli is Reflected in CRISPR Spacer Composition. Appl. Environ. Microbiol. 79:5910-5920.
Chen, C., C. A. Blumentritt, M. M. Curtis, V. Sperandio, A. G. Torres, and E. G. Dudley. 2013. Restrictive streptomycin-resistant mutations decrease the formation of attaching and effacing lesions in Escherichia coli O157:H7 strains. Antimicrob. Agents Chemother. 57:4260-4266.
DiMarzio, M., N. Shariat, S. Kariyawasam, R. Barrangou, and E. G. Dudley. 2013. Antibiotic resistance in Salmonella Typhimurium associates with CRISPR sequence type. Antimicrob. Agents Chemother. 57:4282-4289.
Uhlich, G. A., C. Y. Chen, B. J. Cottrell, C. S. Hofmann, E. G. Dudley, T. P. Strobaugh, and L. H. Nguyen. 2013. Phage insertion in mlrA and variations in rpoS limit curli expression and biofilm formation in Escherichia coli serotype O157:H7. Microbiology UK. 159:1586-1596.
Shariat, N., M. K. Kirchner, C. H. Sandt, E. Trees, R. Barrangou, and E. G. Dudley. 2013. CRISPR-MVLST Subtyping of Salmonella serovar Newport Outbreak Isolates and Determination of the Relationship Between CRISPR-MVLST and PFGE. J. Clin. Microbiol. 51:2328-2336.
Valderrama, W. B., E. G. Dudley, S. Doores, and C. N. Cutter. Commercially available rapid methods for detection of selected foodborne pathogens. Accepted in Crit. Rev. Fd. Sc. Nutr.
Svoboda, A. L., E. G. Dudley, C. DebRoy, E. W. Mills, and C. N. Cutter. Presence of Shiga toxin-producing Escherichia coli O-groups in small and very small beef processing plants and resulting ground beef detected by a multiplex polymerase chain reaction assay. Foodborne Pathog. Dis. 10:789-795.
Eppinger, M., S. Daugherty, S. Agrawai, K. Galens, N. Sengamalay, L. Sadzewicz, L. Tallon, T. A. Cebula, M. K. Mammel, P. Feng, R. Soderlund, P. I. Tarr, C. DebRoy, E. G. Dudley, C. M. Fraser, J. Ravel. 2013. Whole-genome draft sequences of 26 enterohemorrhagic Escherichia coli O157:H7 strains. Genom. Announc. 1:e00134-12.
Chen C., C. R. Lewis, K. Goswami, E. L. Roberts, C. Debroy, and E. G. Dudley. 2013. Identification and Characterization of Spontaneous Deletions within the Sp11-Sp12 Prophage Region of Escherichia coli O157:H7 Sakai. Appl. Environ. Microbiol. 79:1934-1941.
Shariat, N., M. J. DiMarzio, S. Yin, L. Dettinger, C. H. Sandt, J. R. Lute, R. Barrangou, and E. G. Dudley. 2013. The combination of CRISPR-MVLST and PFGE provides increased discriminatory power for differentiating human clinical isolates of Salmonella enterica subsp. enterica serovar Enteritidis. Food Microbiol. 34:164-173.
Weyrich L.S., O. Y. Rolin, S. J. Muse, J. Park, N. Spidale, M. J. Kennett, S. E. Hester, C Chen, E. G. Dudley, and E. T. Harvill. 2012. A Type VI secretion system encoding locus is required for Bordetella bronchiseptica immunomodulation and persistence in vivo. PloS One 7:e45892
Verghese B., N. D. 3rd Schwalm, E. G. Dudley, and S. J. Knabel. 2012. A combined multi-virulence-locus sequence typing and Staphylococcal Cassette Chromosome mec typing scheme possesses enhanced discriminatory power for genotyping MRSA. Infect Genet Evol. 12:1816-1821.
Miller D.M., E. G. Dudley, and R. F. Roberts. 2012. Technical note: development of a quantitative PCR method for monitoring strain dynamics during yogurt manufacture. J. Dairy Sci. 95:4868-4872.
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Just a few of my favorite things
Publications
Fluoroquinolone sales in food animals and quinolone resistance in non-typhoidal Salmonella from retail meats
Journal of Global Antimicrobial Resistance, Yin, Xin, Dudley, Edward G., Pinto, Casey N., M'ikanatha, Nkuchia M., 2022
Genomic analysis of Salmonella Typhimurium from humans and food sources accurately predicts phenotypic multi-drug resistance
Food Microbiology, Yin, Xin, Fu, Yezhi, Tate, Heather, Pinto, Casey, Dudley, Edward G., M'ikanatha, Nkuchia M., 2022
Comparative Genomic Analysis of Salmonella enterica Serovar Typhimurium Isolates from Passerines Reveals Two Lineages Circulating in Europe, New Zealand, and the United States
Applied and Environmental Microbiology, Fu, Yezhi, M'ikanatha, Nkuchia M., Dudley, Edward G., 2022
Salmonella enterica Serovar Typhimurium Isolates from Wild Birds in the United States Represent Distinct Lineages Defined by Bird Type
Applied and Environmental Microbiology, Fu, Yezhi, M'ikanatha, Nkuchia M., Lorch, Jeffrey M., Blehert, David S., Berlowski-Zier, Brenda, Whitehouse, Chris A., Li, Shaoting, Deng, Xiangyu, Smith, Jared C., Shariat, Nikki W., Nawrocki, Erin M., Dudley, Edward G., 2022
Mcc1229, an Stx2a-Amplifying Microcin, Is Produced In Vivo and Requires CirA for Activity
Infection and Immunity, Nawrocki, Erin M., Hutchins, Laura E., Eaton, Kathryn A., Dudley, Edward G., 2022
Evidence for common ancestry and microevolution of passerine-adapted Salmonella enterica serovar Typhimurium in the UK and USA
Microbial genomics, Fu, Yezhi, Smith, Jared C., Shariat, Nikki W., M’ikanatha, Nkuchia M., Dudley, Edward G., 2022
Mcc1229, an Stx2a-amplifying microcin, is produced in vivo and requires CirA for activity.
Infection and immunity, Nawrocki, E, Hutchins, L, Eaton, K, Dudley, Edward, 2021
Antimicrobial-coated films as food packaging: A review
Comprehensive Reviews in Food Science and Food Safety, Fu, Yezhi, Dudley, Edward G., 2021
O-serotype distribution of Escherichia coli bloodstream infection isolates in critically ill patients in The Netherlands
Vaccine, Verboom, D. M., Varkila, M. R.J., Morrow, B., Davies, T., Ibarra de Palacios, P., Poolman, J., Hermans, P. W.M., Dudley, E. G., Roberts, E., Cremer, O. L., Bonten, M. J.M., 2021
A Targeted Sequencing Assay for Serotyping Escherichia coli Using AgriSeq Technology
Frontiers in Microbiology, Elder, Jacob R., Fratamico, Pina M., Liu, Yanhong, Needleman, David S., Bagi, Lori, Tebbs, Robert, Allred, Adam, Siddavatam, Prasad, Suren, Haktan, Gujjula, Krishna Reddy, DebRoy, Chitrita, Dudley, Edward G., Yan, Xianghe, 2021
CRISPR typing in Salmonella, Shariat, Nikki, Dudley, Edward, 2021
CRISPR Typing of Salmonella Isolates, Shariat, Nikki, Dudley, Edward, 2021
Low occurrence of multi-antimicrobial and heavy metal resistance in Salmonella enterica from wild birds in the United States
Environmental Microbiology, Fu, Yezhi, M'ikanatha, Nkuchia M., Whitehouse, Chris A., Tate, Heather, Ottesen, Andrea, Lorch, Jeffrey M., Blehert, David S., Berlowski-Zier, Brenda, Dudley, Edward G., 2021
A Toxic Environment
Applied and Environmental Microbiology, Nawrocki, Erin M., Mosso, Hillary M., Dudley, Edward G., 2020
Special Section on the Third International E. coli and the Mucosal Immune System (ECMIS) Symposium
Applied and Environmental Microbiology, Dudley, Edward G., 2020
The Intriguing Interaction of Escherichia coli with the Host Environment and Innovative Strategies To Interfere with Colonization: a Summary of the 2019 E. coli and the Mucosal Immune System Meeting
Applied and Environmental Microbiology, Cox, Eric, Aloulou, Meryem, Fleckenstein, James M., Schäffer, Christina, Sjöling, Åsa, Schüller, Stephanie, Hanevik, Kurt, Devriendt, Bert, Zhang, Weiping, Svennerholm, Ann Mari, Dudley, Edward G., 2020
Whole Genome Sequencing: The Impact on Foodborne Outbreak Investigations, Kovac, Jasna, Dudley, Edward G., Nawrocki, Erin M., Yan, Runan, Chung, Taejung, 2020
Novel effective bacillus cereus group species "bacillus clarus" is represented by antibiotic-producing strain ATCC 21929 isolated from soil
mSphere, Acevedo, Marysabel Méndez, Carroll, Laura M., Mukherjee, Manjari, Mills, Emma, Xiaoli, Lingzi, Dudley, Edward G., Kovac, Jasna, 2020
Draft genome sequences of isolates of diverse host origin from the E. coli reference center at penn state university
Microbiology Resource Announcements, Lacher, David W., Mammel, Mark K., Gangiredla, Jayanthi, Gebru, Solomon T., Barnaba, Tammy J., Majowicz, Sydney A., Dudley, Edward G., 2020
Whole-genome sequences of salmonella isolates from an ecological wastewater treatment system
Microbiology Resource Announcements, Connolly, Charles J., Kaminsky, Laura, Pinto, Gabriella N., Sinclair, Priscilla C., Bajracharya, Gyasu, Yan, Runan, Nawrocki, Erin M., Dudley, Edward G., Kovaca, Jasna, 2020
Microbial synergy between Pichia kudriazevii YS201 and Bacillus subtilis BS38 improves pulp degradation and aroma production in cocoa pulp simulation medium
Heliyon, Ouattara, Honoré G., Elias, Ryan J., Dudley, Edward G., 2020
A Putative Microcin Amplifies Shiga Toxin 2a Production of Escherichia coli O157:H7
Journal of Bacteriology, Mosso, Hillary M., Xiaoli, Lingzi, Banerjee, Kakolie, Hoffmann, Maria, Yao, Kuan, Dudley, Edward G., 2019
Detection of CTX-M-1 extended-spectrum beta-lactamase among ceftiofur-resistant Salmonella enterica clinical isolates of poultry
Journal of Veterinary Diagnostic Investigation, Denagamage, Thomas N., Wallner-Pendleton, Eva, Jayarao, Bhushan M., Xiaoli, Lingzi, Dudley, Edward G., Wolfgang, David, Kariyawasam, Subhashinie, 2019
Use of whole genome sequencing in surveillance for antimicrobial-resistant Shigella sonnei infections acquired from domestic and international sources
Microbial genomics, Abelman, Rebecca L., M'ikanatha, Nkuchia M., Figler, Hillary M., Dudley, Edward G., 2019
Retrospective whole-genome sequencing analysis distinguished PFGE and drug-resistance-matched retail meat and clinical Salmonella isolates
Journal of General Microbiology, Keefer, Andrea B., Xiaoli, Lingzi, M’ikanatha, Nkuchia M., Yao, Kuan, Hoffmann, Maria, Dudley, Edward G., 2019
Whole-genome sequences of Escherichia coli isolates from cocoa beans imported from bolivia
Microbiology Resource Announcements, Nwanosike, Hephzibah, Chung, Taejung, Xiaoli, Lingzi, Condello, Megan, Dudley, Edward G., Kovac, Jasna, 2019
Whole-genome sequencing reveals resistome of highly drug-resistant retail meat and human Salmonella Dublin
Zoonoses and Public Health, Eyler, Andrea B., M'ikanatha, Nkuchia M., Xiaoli, Lingzi, Dudley, Edward G., 2019
Non-pathogenic escherichia coli enhance Stx2a production of E. coli O157:H7 through both bamA-dependent and independent mechanisms
Frontiers in Microbiology, Xiaoli, Lingzi, Figler, Hillary M., Banerjee, Kakolie Goswami, Hayes, Christopher S., Dudley, Edward G., 2018
Critical synergistic concentration of lecithin phospholipids improves the antimicrobial activity of eugenol against Escherichia coli
Applied and Environmental Microbiology, Zhang, Haoshu, Dudley, Edward G., Harte, Federico, 2017
Identification of a mouse Lactobacillus johnsonii strain with deconjugase activity against the FXR antagonist T-β-MCA
PLoS One, DiMarzio, Michael, Rusconi, Brigida, Yennawar, Neela H., Eppinger, Mark, Patterson, Andrew D., Dudley, Edward G., 2017
Critical concentration of lecithin enhances the antimicrobial activity of eugenol against Escherichia coli
Applied and Environmental Microbiology, Zhang, Haoshu, Dudley, Edward G., Davidson, P. Michael, Harte, Federico, 2017
Draft genome sequence of Bacillus velezensis GF610, a producer of potent anti- Listeria agents
Microbiology Resource Announcements, Gerst, Michelle M., Dudley, Edward G., Xiaoli, Lingzi, Yousef, Ahmed E., 2017
Draft genome sequence of Brevibacillus laterosporus OSY-I1, a strain that produces brevibacillin, which combats drug-resistant Gram-positive bacteria
Microbiology Resource Announcements, Yang, Xu, Huang, En, Yesil, Mustafa, Xiaoli, Lingzi, Dudley, Edward G., Yousef, Ahmed E., 2017
Whole-genome sequence of Escherichia coli serotype O157:H7 strain PA20
Microbiology Resource Announcements, Uhlich, Gaylen A., Paoli, George C., Zhang, Xinmin, Dudley, Edward G., Figler, Hillary M., Cottrell, Bryan J., Andreozzi, Elisa, 2017
Longitudinal monitoring of successive commercial layer flocks for salmonella enterica serovar enteritidis
Foodborne Pathogens and Disease, Denagamage, Thomas N., Patterson, Paul, Wallner-Pendleton, Eva, Trampel, Darrell, Shariat, Nikki, Dudley, Edward G., Jayarao, Bhushan M., Kariyawasam, Subhashinie, 2016
Commercially Available Rapid Methods for Detection of Selected Food-borne Pathogens
Critical Reviews in Food Science and Nutrition, Valderrama, Wladir B., Dudley, Edward G., Doores, Stephanie, Cutter, Catherine N., 2016
Prevalence and Spatial Distribution of Salmonella Infections in the Pennsylvania Raccoon (Procyon lotor)
Zoonoses and Public Health, Very, K. J., Kirchner, M. K., Shariat, N., Cottrell, W., Sandt, C. H., Dudley, E. G., Kariyawasam, S., Jayarao, B. M., 2016
The interplay of Escherichia coli O157:H7 and commensal E. coli
Expert Review of Gastroenterology and Hepatology, Figler, Hillary M., Dudley, Edward G., 2016
CRISPR-Based Typing and Next-Generation Tracking Technologies
Annual review of food science and technology, Barrangou, Rodolphe, Dudley, Edward G., 2016
Diversity of secretion systems associated with virulence characteristics of the classical bordetellae
Journal of General Microbiology, Park, Jihye, Zhang, Ying, Chen, Chun, Dudley, Edward G., Harvill, Eric T., 2015
A newly discovered Bordetella species carries a transcriptionally active CRISPR-Cas with a small Cas9 endonuclease
BMC Genomics, Ivanov, Yury V., Shariat, Nikki, Register, Karen B., Linz, Bodo, Rivera, Israel, Hu, Kai, Dudley, Edward G., Harvill, Eric T., 2015
Escherichia coli O157
BMC Genomics, Yin, Shuang, Rusconi, Brigida, Sanjar, Fatemeh, Goswami, Kakolie, Xiaoli, Lingzi, Eppinger, Mark, Dudley, Edward G., 2015
Diversity of CRISPR loci and virulence genes in pathogenic Escherichia coli isolates from various sources
International Journal of Food Microbiology, Jiang, Yun, Yin, Shuang, Dudley, Edward G., Cutter, Catherine N., 2015
Coculture of Escherichia coli O157:H7 with a nonpathogenic E. coli strain increases toxin production and virulence in a germfree mouse model
Infection and Immunity, Goswami, Kakolie, Chen, Chun, Xiaoli, Lingzi, Eaton, Kathryn A., Dudley, Edward G., 2015
Characterization and evolution of Salmonella CRISPR-Cas systems
Journal of General Microbiology, Shariat, Nikki, Timme, Ruth E., Pettengill, James B., Barrangou, Rodolphe, Dudley, Edward G., 2015
Comparative analysis of subtyping methods against a whole-genome-sequencing standard for Salmonella enterica serotype Enteritidis
Journal of Clinical Microbiology, Deng, Xiangyu, Shariat, Nikki, Driebe, Elizabeth M., Roe, Chandler C., Tolar, Beth, Trees, Eija, Keim, Paul, Zhang, Wei, Dudley, Edward G., Fields, Patricia I., Engelthaler, David M., 2015
Complete nucleotide sequence of pRS218, a large virulent plasmid that augment pathogenic potential of meningitis-associated Escherichia coli strain RS218
BMC Microbiology, Wijetunge, D, Karunathilake, E, Chaudhari, A, Katani, R, Dudley, Edward, Kapur, V, DebRoy, C, Kariyawasam, S, 2015
Genome sequence of Escherichia coli O157
Microbiology Resource Announcements, Sanjar, Fatemeh, Hazen, Tracy H., Shah, Sadiq M., Koenig, Sara S.K., Agrawal, Sonia, Daugherty, Sean, Sadzewicz, Lisa, Tallon, Luke J., Mammel, Mark K., Feng, Peter, Soderlund, Robert, Tarr, Phillip I., DebRoy, Chitrita, Dudley, Edward G., Cebula, Thomas A., Ravel, Jacques, Fraser, Claire M., Rasko, David A., Eppinger, Mark, 2014
Ceramide trihexoside bottom spot as a receptor to detect Shiga toxin 2 from STEC
August 2014 newsletter of Matreya, LLC, Xiaoli, L, Goswami, K, Dudley, Edward, 2014
CRISPRs: molecular markers for tracking antibiotic resistant strains of Salmonella enterica
Winter 2014 newsletter of the Alliance for the Prudent Use of Antibiotics, Dudley, Edward, 2014
Complete nucleotide sequence of pRS218, a large virulence plasmid, that augments pathogenic potential of meningitis-associated Escherichia coli strain RS218
BMC Microbiology, Wijetunge, Dona Saumya S., Karunathilake, Kurundu Hewage Eranda M., Chaudhari, Atul, Katani, Robab, Dudley, Edward G., Kapur, Vivek, Debroy, Chitrita, Kariyawasam, Subhashinie, 2014
CRISPRs
Applied and Environmental Microbiology, Shariat, Nikki, Dudley, Edward G., 2014
CRISPR-MVLST subtyping of Salmonella enterica subsp. enterica serovars Typhimurium and Heidelberg and application in identifying outbreak isolates
BMC Microbiology, Shariat, Nikki, Sandt, Carol H., Dimarzio, Michael J., Barrangou, Rodolphe, Dudley, Edward G., 2013
Bifidobacterium animalis subsp. lactis ATCC 27673 Is a genomically unique strain within its conserved subspecies
Applied and Environmental Microbiology, Loquasto, Joseph R., Barrangou, Rodolphe, Dudley, Edward G., Stahl, Buffy, Chen, Chun, Roberts, Robert F., 2013
Where are we heading with Salmonella molecular subtyping?
Future Microbiology, Shariat, Nikki, Dudley, Edward G., 2013
The evolutionary divergence of shiga toxin-producing escherichia coli is reflected in clustered regularly interspaced short palindromic repeat (CRISPR) spacer composition
Applied and Environmental Microbiology, Yin, Shuang, Jensen, Mark A., Bai, Jiawei, DebRoy, Chitrita, Barrangou, Rodolphe, Dudley, Edward G., 2013
Presence of shiga toxin-producing escherichia coli o-groups in small and very-small beef-processing plants and resulting ground beef detected by a multiplex polymerase chain reaction assay
Foodborne Pathogens and Disease, Svoboda, Amanda L., Dudley, Edward G., Debroy, Chitrita, Mills, Edward W., Cutter, Catherine N., 2013
Restrictive streptomycin resistance mutations decrease the formation of attaching and effacing lesions in escherichia coli O157:H7 strains
Antimicrobial Agents and Chemotherapy, Chen, Chun, Blumentritt, Carla A., Curtis, Meredith M., Sperandio, Vanessa, Torres, Alfredo G., Dudley, Edward G., 2013
Phage insertion in mlrA and variations in rpoS limit curli expression and biofilm formation in Escherichia coli serotype O157
Journal of General Microbiology, Uhlich, Gaylen A., Chen, Chin Yi, Cottrell, Bryan J., Hofmann, Christopher S., Dudley, Edward G., Strobaugh, Terence P., Nguyen, Ly Huong, 2013
Subtyping of Salmonella enterica serovar newport outbreak isolates by CRISPR-MVLST and determination of the relationship between CRISPR-MVLST and PFGE results
Journal of Clinical Microbiology, Shariat, Nikki, Kirchner, Margaret K., Sandt, Carol H., Trees, Eija, Barrangou, Rodolphe, Dudley, Edward G., 2013
Corrigendum to "A combined multi-virulence-locus sequence typing and Staphylococcal Cassette Chromosome mec typing scheme possesses enhanced discriminatory power for genotyping MRSA" [Infection, Genetics and Evolution 12 (2012) 1816-1821]
Infection, Genetics and Evolution, Verghese, Bindhu, Schwalm, Nathan D., Dudley, Edward G., Knabel, Stephen J., 2013
The combination of CRISPR-MVLST and PFGE provides increased discriminatory power for differentiating human clinical isolates of Salmonella enterica subsp. enterica serovar Enteritidis
Food Microbiology, Shariat, Nikki, DiMarzio, Michael J., Yin, Shuang, Dettinger, Lisa, Sandt, Carol H., Lute, James R., Barrangou, Rodolphe, Dudley, Edward G., 2013
Identification and characterization of spontaneous deletions within the Sp11-Sp12 prophage region of Escherichia coli O157:H7 Sakai
Applied and Environmental Microbiology, Chen, Chun, Lewis, Carrie R., Goswami, Kakolie, Roberts, Elisabeth L., DebRoy, Chitrita, Dudley, Edward G., 2013
Whole-genome draft sequences of 26 enterohemorrhagic Escherichia coli O157:H7 strains
Microbiology Resource Announcements, Eppinger, Mark, Daugherty, Sean, Agrawal, Sonia, Galens, Kevin, Sengamalay, Naomi, Sadzewicz, Lisa, Tallon, Luke, Cebula, Thomas A., Mammel, Mark K., Feng, Peter, Soderlund, Robert, Tarr, Phillip I., DebRoy, Chitrita, Dudley, Edward G., Fraser, Claire M., Ravel, Jacques, 2013
Antibiotic resistance in Salmonella Typhimurium associates with CRISPR sequence type
Antimicrobial Agents and Chemotherapy, Di Marzio, Michael, Shariat, Nikki, Kariyawasam, Subhashinie, Barrangou, Rodolphe, Dudley, Edward G., 2013
Dipeptidase DA, Dudley, Edward G., Steele, James L., 2013
A combined multi-virulence-locus sequence typing and Staphylococcal Cassette Chromosome mec typing scheme possesses enhanced discriminatory power for genotyping MRSA
Infection, Genetics and Evolution, Verghese, Bindhu, Schwalm, Nathan D., Dudley, Edward G., Knabel, Stephen J., 2012
A type VI secretion system encoding locus is required for bordetella bronchiseptica immunomodulation and persistence in vivo
PLoS One, Weyrich, Laura S., Rolin, Olivier Y., Muse, Sarah J., Park, Jihye, Spidale, Nicholas, Kennett, Mary J., Hester, Sara E., Chen, Chun, Dudley, Edward G., Harvill, Eric T., 2012
Technical note
Journal of Dairy Science, Miller, D. M., Dudley, E. G., Roberts, R. F., 2012
