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PCR ribotypes of Clostridioides difficile across Texas from 2011 to 2018 including emergence of ribotype 255.

Gonzales-Luna AJ, Carlson TJ, Dotson KM, Poblete K, Costa G, Miranda J, Lancaster C, Walk ST, Tupy S, Begum K, Alam MJ, Garey KW.

Emerg Microbes Infect. 2020 Dec;9(1):341-347. doi: 10.1080/22221751.2020.1721335.


The Human Gut Microbiome's Influence on Arsenic Toxicity.

Coryell M, Roggenbeck BA, Walk ST.

Curr Pharmacol Rep. 2019 Dec;5(6):491-504. doi: 10.1007/s40495-019-00206-4. Epub 2019 Nov 25.


Long-term flow through human intestinal organoids with the gut organoid flow chip (GOFlowChip).

Sidar B, Jenkins BR, Huang S, Spence JR, Walk ST, Wilking JN.

Lab Chip. 2019 Oct 9;19(20):3552-3562. doi: 10.1039/c9lc00653b.


Rethinking gut microbiome residency and the Enterobacteriaceae in healthy human adults.

Martinson JNV, Pinkham NV, Peters GW, Cho H, Heng J, Rauch M, Broadaway SC, Walk ST.

ISME J. 2019 Sep;13(9):2306-2318. doi: 10.1038/s41396-019-0435-7. Epub 2019 May 14.


Epidemic Clostridioides difficile Ribotype 027 Lineages: Comparisons of Texas Versus Worldwide Strains.

Endres BT, Begum K, Sun H, Walk ST, Memariani A, Lancaster C, Gonzales-Luna AJ, Dotson KM, Bassères E, Offiong C, Tupy S, Kuper K, Septimus E, Arafat R, Alam MJ, Zhao Z, Hurdle JG, Savidge TC, Garey KW.

Open Forum Infect Dis. 2019 Feb 9;6(2):ofz013. doi: 10.1093/ofid/ofz013. eCollection 2019 Feb.


The gut microbiome is required for full protection against acute arsenic toxicity in mouse models.

Coryell M, McAlpine M, Pinkham NV, McDermott TR, Walk ST.

Nat Commun. 2018 Dec 21;9(1):5424. doi: 10.1038/s41467-018-07803-9.


Correction to: Risk Factors for Clostridium difficile Isolation in Inflammatory Bowel Disease: A Prospective Study.

Micic D, Yarur A, Gonsalves A, Rao VL, Broadaway S, Cohen R, Dalal S, Gaetano JN, Glick LR, Hirsch A, Pekow J, Sakuraba A, Walk ST, Rubin DT.

Dig Dis Sci. 2018 Oct;63(10):2815. doi: 10.1007/s10620-018-5249-3.


Antimicrobial susceptibility and ribotypes of Clostridium difficile isolates from a Phase 2 clinical trial of ridinilazole (SMT19969) and vancomycin.

Snydman DR, McDermott LA, Thorpe CM, Chang J, Wick J, Walk ST, Vickers RJ.

J Antimicrob Chemother. 2018 Aug 1;73(8):2078-2084. doi: 10.1093/jac/dky135.


A repeat offender: Recurrent extraintestinal Clostridium difficile infection following fecal microbiota transplantation.

Gardiner BJ, Thorpe CM, Pinkham NV, McDermott LA, Walk ST, Snydman DR.

Anaerobe. 2018 Jun;51:68-72. doi: 10.1016/j.anaerobe.2018.04.007. Epub 2018 Apr 21.


Microbiota-Derived Indole Metabolites Promote Human and Murine Intestinal Homeostasis through Regulation of Interleukin-10 Receptor.

Alexeev EE, Lanis JM, Kao DJ, Campbell EL, Kelly CJ, Battista KD, Gerich ME, Jenkins BR, Walk ST, Kominsky DJ, Colgan SP.

Am J Pathol. 2018 May;188(5):1183-1194. doi: 10.1016/j.ajpath.2018.01.011. Epub 2018 Feb 16.


Risk Factors for Clostridium difficile Isolation in Inflammatory Bowel Disease: A Prospective Study.

Micic D, Yarur A, Gonsalves A, Rao VL, Broadaway S, Cohen R, Dalal S, Gaetano JN, Glick LR, Hirsch A, Pekow J, Sakuraba A, Walk ST, Rubin DT.

Dig Dis Sci. 2018 Apr;63(4):1016-1024. doi: 10.1007/s10620-018-4941-7. Epub 2018 Feb 8. Erratum in: Dig Dis Sci. 2018 Oct;63(10):2815.


SMV1, an extremely stable thermophilic virus platform for nanoparticle trafficking in the mammalian GI tract.

Uldahl KB, Walk ST, Olshefsky SC, Young MJ, Peng X.

J Appl Microbiol. 2017 Nov;123(5):1286-1297. doi: 10.1111/jam.13584. Epub 2017 Oct 10.


Community Environmental Contamination of Toxigenic Clostridium difficile.

Alam MJ, Walk ST, Endres BT, Basseres E, Khaleduzzaman M, Amadio J, Musick WL, Christensen JL, Kuo J, Atmar RL, Garey KW.

Open Forum Infect Dis. 2017 Feb 10;4(1):ofx018. doi: 10.1093/ofid/ofx018. eCollection 2017 Winter.


Healthy human gut phageome.

Manrique P, Bolduc B, Walk ST, van der Oost J, de Vos WM, Young MJ.

Proc Natl Acad Sci U S A. 2016 Sep 13;113(37):10400-5. doi: 10.1073/pnas.1601060113. Epub 2016 Aug 29.


Serum 25-Hydroxyvitamin D Levels are not Associated with Adverse Outcomes in Clostridium Difficile Infection.

Micic D, Rao K, Trindade BC, Walk ST, Chenoweth E, Jain R, Trivedi I, Santhosh K, Young VB, Aronoff DM.

Infect Dis Rep. 2015 Sep 29;7(3):5979. doi: 10.4081/idr.2015.5979. eCollection 2015 Aug 11.


Vaginal biogenic amines: biomarkers of bacterial vaginosis or precursors to vaginal dysbiosis?

Nelson TM, Borgogna JL, Brotman RM, Ravel J, Walk ST, Yeoman CJ.

Front Physiol. 2015 Sep 29;6:253. doi: 10.3389/fphys.2015.00253. eCollection 2015.


The "Cryptic" Escherichia.

Walk ST.

EcoSal Plus. 2015;6(2). doi: 10.1128/ecosalplus.ESP-0002-2015. Review.


In the Endemic Setting, Clostridium difficile Ribotype 027 Is Virulent But Not Hypervirulent.

Aitken SL, Alam MJ, Khaleduzzaman M, Walk ST, Musick WL, Pham VP, Christensen JL, Atmar RL, Xie Y, Garey KW.

Infect Control Hosp Epidemiol. 2015 Nov;36(11):1318-23. doi: 10.1017/ice.2015.187. Epub 2015 Aug 20. Erratum in: Infect Control Hosp Epidemiol. 2016 Jan;37(1):124. Khaleduzzuman, Mohammed [corrected to Khaleduzzaman, Mohammed].


Clostridium difficile ribotype 027: relationship to age, detectability of toxins A or B in stool with rapid testing, severe infection, and mortality.

Rao K, Micic D, Natarajan M, Winters S, Kiel MJ, Walk ST, Santhosh K, Mogle JA, Galecki AT, LeBar W, Higgins PD, Young VB, Aronoff DM.

Clin Infect Dis. 2015 Jul 15;61(2):233-41. doi: 10.1093/cid/civ254. Epub 2015 Mar 31.


Evaluation of portability and cost of a fluorescent PCR ribotyping protocol for Clostridium difficile epidemiology.

Martinson JN, Broadaway S, Lohman E, Johnson C, Alam MJ, Khaleduzzaman M, Garey KW, Schlackman J, Young VB, Santhosh K, Rao K, Lyons RH Jr, Walk ST.

J Clin Microbiol. 2015 Apr;53(4):1192-7. doi: 10.1128/JCM.03591-14. Epub 2015 Jan 28.


Gender Differences in Non-Toxigenic Clostridium difficile Colonization and Risk of Subsequent C. difficile Infection.

Natarajan M, Rogers MA, Bundy J, Micic D, Walk ST, Santhosh K, Rao K, Winters S, Young VB, Aronoff DM.

Clin Res Infect Dis. 2015;2(2). pii: 1017. Epub 2015 Aug 3.


Investigation of potentially pathogenic Clostridium difficile contamination in household environs.

Alam MJ, Anu A, Walk ST, Garey KW.

Anaerobe. 2014 Jun;27:31-3. doi: 10.1016/j.anaerobe.2014.03.002. Epub 2014 Mar 19.


The systemic inflammatory response to Clostridium difficile infection.

Rao K, Erb-Downward JR, Walk ST, Micic D, Falkowski N, Santhosh K, Mogle JA, Ring C, Young VB, Huffnagle GB, Aronoff DM.

PLoS One. 2014 Mar 18;9(3):e92578. doi: 10.1371/journal.pone.0092578. eCollection 2014.


Emergence of Carbapenemaseproducing Klebsiella Pneumoniae of Sequence type 258 in Michigan, USA.

Jain R, Walk ST, Aronoff DM, Young VB, Newton DW, Chenoweth CE, Washer LL.

Infect Dis Rep. 2013 Mar 19;5(1):e5. doi: 10.4081/idr.2013.e5. eCollection 2013 Jan 22. Review.


Candidate mediators of chondrocyte mechanotransduction via targeted and untargeted metabolomic measurements.

Jutila AA, Zignego DL, Hwang BK, Hilmer JK, Hamerly T, Minor CA, Walk ST, June RK.

Arch Biochem Biophys. 2014 Mar 1;545:116-23. doi: 10.1016/ Epub 2014 Jan 16.


Detection of mixed populations of Clostridium difficile from symptomatic patients using capillary-based polymerase chain reaction ribotyping.

Behroozian AA, Chludzinski JP, Lo ES, Ewing SA, Waslawski S, Newton DW, Young VB, Aronoff DM, Walk ST.

Infect Control Hosp Epidemiol. 2013 Sep;34(9):961-966. doi: 10.1086/671728. Epub 2013 Jul 12.


A clinical and epidemiological review of non-toxigenic Clostridium difficile.

Natarajan M, Walk ST, Young VB, Aronoff DM.

Anaerobe. 2013 Aug;22:1-5. doi: 10.1016/j.anaerobe.2013.05.005. Epub 2013 May 29. Review.


Understanding increased mortality in Clostridium difficile-infected older adults.

Walk ST, Micic D, Galecki AT, Young VB, Aronoff DM.

Clin Infect Dis. 2013 Aug;57(4):625-6. doi: 10.1093/cid/cit310. Epub 2013 May 8. No abstract available.


The relationship between phenotype, ribotype, and clinical disease in human Clostridium difficile isolates.

Carlson PE Jr, Walk ST, Bourgis AE, Liu MW, Kopliku F, Lo E, Young VB, Aronoff DM, Hanna PC.

Anaerobe. 2013 Dec;24:109-16. doi: 10.1016/j.anaerobe.2013.04.003. Epub 2013 Apr 20.


Clostridium difficile ribotype diversity at six health care institutions in the United States.

Waslawski S, Lo ES, Ewing SA, Young VB, Aronoff DM, Sharp SE, Novak-Weekley SM, Crist AE Jr, Dunne WM, Hoppe-Bauer J, Johnson M, Brecher SM, Newton DW, Walk ST.

J Clin Microbiol. 2013 Jun;51(6):1938-41. doi: 10.1128/JCM.00056-13. Epub 2013 Apr 3.


Procalcitonin levels associate with severity of Clostridium difficile infection.

Rao K, Walk ST, Micic D, Chenoweth E, Deng L, Galecki AT, Jain R, Trivedi I, Yu M, Santhosh K, Ring C, Young VB, Huffnagle GB, Aronoff DM.

PLoS One. 2013;8(3):e58265. doi: 10.1371/journal.pone.0058265. Epub 2013 Mar 7.


Reply to Walker et al.

Walk ST, Micic D, Galecki AT, Rogers MA, Washer L, Newton DW, Malani PN, Young VB, Aronoff DM.

Clin Infect Dis. 2013 Jun;56(12):1846-7. doi: 10.1093/cid/cit099. Epub 2013 Feb 18. No abstract available.


Emergence of a novel extended-spectrum-β-lactamase (ESBL)-producing, fluoroquinolone-resistant clone of extraintestinal pathogenic Escherichia coli in Kumasi, Ghana.

Feglo P, Adu-Sarkodie Y, Ayisi L, Jain R, Spurbeck RR, Springman AC, Engleberg NC, Newton DW, Xi C, Walk ST.

J Clin Microbiol. 2013 Feb;51(2):728-30. doi: 10.1128/JCM.03006-12. Epub 2012 Dec 12. No abstract available.


Reply to McDonald.

Walk ST, Micic D, Galecki AT, Rogers MA, Washer L, Newton DW, Malani PN, Young VB, Aronoff DM.

Clin Infect Dis. 2013 Mar;56(6):907-8. doi: 10.1093/cid/cis1003. Epub 2012 Nov 29. No abstract available.


The nose knows not: poor predictive value of stool sample odor for detection of Clostridium difficile.

Rao K, Berland D, Young C, Walk ST, Newton DW.

Clin Infect Dis. 2013 Feb;56(4):615-6. doi: 10.1093/cid/cis974. Epub 2012 Nov 19. No abstract available.


Disruption of the human gut microbiota following Norovirus infection.

Nelson AM, Walk ST, Taube S, Taniuchi M, Houpt ER, Wobus CE, Young VB.

PLoS One. 2012;7(10):e48224. doi: 10.1371/journal.pone.0048224. Epub 2012 Oct 30.


Clostridium difficile ribotype does not predict severe infection.

Walk ST, Micic D, Jain R, Lo ES, Trivedi I, Liu EW, Almassalha LM, Ewing SA, Ring C, Galecki AT, Rogers MA, Washer L, Newton DW, Malani PN, Young VB, Aronoff DM.

Clin Infect Dis. 2012 Dec;55(12):1661-8. doi: 10.1093/cid/cis786. Epub 2012 Sep 12.


Escherichia coli isolates that carry vat, fyuA, chuA, and yfcV efficiently colonize the urinary tract.

Spurbeck RR, Dinh PC Jr, Walk ST, Stapleton AE, Hooton TM, Nolan LK, Kim KS, Johnson JR, Mobley HL.

Infect Immun. 2012 Dec;80(12):4115-22. doi: 10.1128/IAI.00752-12. Epub 2012 Sep 10.


Kinetics of uropathogenic Escherichia coli metapopulation movement during urinary tract infection.

Walters MS, Lane MC, Vigil PD, Smith SN, Walk ST, Mobley HL.

mBio. 2012 Feb 7;3(1). pii: e00303-11. doi: 10.1128/mBio.00303-11. Print 2012.


Fimbrial profiles predict virulence of uropathogenic Escherichia coli strains: contribution of ygi and yad fimbriae.

Spurbeck RR, Stapleton AE, Johnson JR, Walk ST, Hooton TM, Mobley HL.

Infect Immun. 2011 Dec;79(12):4753-63. doi: 10.1128/IAI.05621-11. Epub 2011 Sep 12.


Clinical and laboratory features of Streptococcus salivarius meningitis: a case report and literature review.

Wilson M, Martin R, Walk ST, Young C, Grossman S, McKean EL, Aronoff DM.

Clin Med Res. 2012 Feb;10(1):15-25. doi: 10.3121/cmr.2011.1001. Epub 2011 Aug 4. Review.


Non-toxigenic Clostridium sordellii: clinical and microbiological features of a case of cholangitis-associated bacteremia.

Walk ST, Jain R, Trivedi I, Grossman S, Newton DW, Thelen T, Hao Y, Songer JG, Carter GP, Lyras D, Young VB, Aronoff DM.

Anaerobe. 2011 Oct;17(5):252-6. doi: 10.1016/j.anaerobe.2011.06.009. Epub 2011 Jun 25.


Characterization of the cryptic Escherichia lineages: rapid identification and prevalence.

Clermont O, Gordon DM, Brisse S, Walk ST, Denamur E.

Environ Microbiol. 2011 Sep;13(9):2468-77. doi: 10.1111/j.1462-2920.2011.02519.x. Epub 2011 Jun 8.


Genome sequencing of environmental Escherichia coli expands understanding of the ecology and speciation of the model bacterial species.

Luo C, Walk ST, Gordon DM, Feldgarden M, Tiedje JM, Konstantinidis KT.

Proc Natl Acad Sci U S A. 2011 Apr 26;108(17):7200-5. doi: 10.1073/pnas.1015622108. Epub 2011 Apr 11.


Biofilm formation by and thermal niche and virulence characteristics of Escherichia spp.

Ingle DJ, Clermont O, Skurnik D, Denamur E, Walk ST, Gordon DM.

Appl Environ Microbiol. 2011 Apr;77(8):2695-700. doi: 10.1128/AEM.02401-10. Epub 2011 Feb 18.


A randomised trial of sheathed versus standard forceps for obtaining uncontaminated biopsy specimens of microbiota from the terminal ileum.

Dave M, Johnson LA, Walk ST, Young VB, Stidham RW, Chaudhary MN, Funnell J, Higgins PD.

Gut. 2011 Aug;60(8):1043-9. doi: 10.1136/gut.2010.224337. Epub 2011 Feb 11.


Alteration of the murine gut microbiota during infection with the parasitic helminth Heligmosomoides polygyrus.

Walk ST, Blum AM, Ewing SA, Weinstock JV, Young VB.

Inflamm Bowel Dis. 2010 Nov;16(11):1841-9. doi: 10.1002/ibd.21299.


Pseudo-outbreak of Clostridium sordellii infection following probable cross-contamination in a hospital clinical microbiology laboratory.

Aronoff DM, Thelen T, Walk ST, Petersen K, Jackson J, Grossman S, Rudrik J, Newton DW, Chenoweth CE.

Infect Control Hosp Epidemiol. 2010 Jun;31(6):640-2. doi: 10.1086/652774.


Escherichia albertii in wild and domestic birds.

Oaks JL, Besser TE, Walk ST, Gordon DM, Beckmen KB, Burek KA, Haldorson GJ, Bradway DS, Ouellette L, Rurangirwa FR, Davis MA, Dobbin G, Whittam TS.

Emerg Infect Dis. 2010 Apr;16(4):638-46. doi: 10.3201/eid1604.090695.


Cryptic lineages of the genus Escherichia.

Walk ST, Alm EW, Gordon DM, Ram JL, Toranzos GA, Tiedje JM, Whittam TS.

Appl Environ Microbiol. 2009 Oct;75(20):6534-44. doi: 10.1128/AEM.01262-09. Epub 2009 Aug 21.

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