Professor of Molecular Microbiology

Feldman Lab Website

Research Interests:

My lab is focused in microbial glycobiology and its exploitation for vaccine development. We also work on outer membrane vesicles (OMV) biogenesis. We have a particular interest in Acinetobacter baumannii virulence and survival mechanisms.

PubMed Publications: for Feldman + MF
Division of Biology and Biomedical Sciences profile

Office Address:
Departments of Molecular Microbiology and Pathology&Immunology
Washington University School of Medicine
10260 McDonnell Pediatric Research Building
Campus Box 8230
660 S. Euclid Ave.
St. Louis, MO 63110
Phone, office: 314-747-4473
FAX: 314-362-1232
Email: mfeldman [at]  


1994 Licenciate, Universidad Nacional de Rosario, Argentina
2000 Ph.D., Microbiology/Glycobiology, Institute Leloir, Universidad de Buenos Aires, Argentina
2003 Postdoctoral Researcher, Biozentrum. University of Basel. Switzerland and Institute of Cellular Pathology and Faculté de Medécine, Université Catholique de Louvain. Belgium
2005 Postdoctoral Researcher, Department of Microbiology. Swiss Federal Institute of Technology (ETH), Zurich, Switzerland

Current Position:

Associate Professor of Molecular Microbiology
Washington University School of Medicine, St. Louis, MO

Academic Positions and Employment:

2015-present Associate Professor, Washington University School of Medicine, St. Louis, MO
2006-2015 Assistant/Associate Professor, University of Alberta, Edmonton, AB. Canada

Honors and Awards:

2015-2018 Washington University School of Medicine Faculty Diversity Scholar
2010-2015 Canadian Institute of Health Research (CIHR) New Investigator
2007-2014 Alberta Heritage Foundation for Medical Research (AHFMR) Scholar
2008-2010 Alberta Ingenuity New Investigator Award
2000-2001 Post Doctoral Fellowship “Société Générale de Belgique”Universite Catholique de Louvain Brussels – Belgium
1998-2000 PhD Fellowship, Agencia Nacional de Promoción Científica y Tecnológica (ANPCYT-Argentina). Leloir Institute. Universidad de Buenos Aires – Argentina
1994-1998 PhD Fellowship, Concejo Nacional de Investigaciones Científicas y Técnicas (Nacional Research Council (CONICET)-Argentina). Leloir Institute). Universidad de Buenos Aires – Argentina

Editorial Responsibilities:

Journal of Biological Chemistry 2015-2018
Molecular Microbiology 2011-2017
Journal of Bacteriology 2015-2018
Plos One 2013-2014
Guest Editor for PLoS Pathogens 2015

Advisory Panels:

Natural Sciences and Engineering Research Council of Canada (NSERC). 2014

Peer Reviewed Publications:

1. Elhenawy W, Bording-Jorgensen M, Valguarnera E, Haurat MF, Wine E, Feldman MF. LPS Remodeling Triggers Formation of Outer Membrane Vesicles in Salmonella. MBio. 2016 Jul 12;7(4). pii: e00940-16. doi: 10.1128/mBio.00940-16.

2. Valguarnera E, Kinsella RL, Feldman MF. Sugar and Spice Make Bacteria Not Nice: Protein Glycosylation and Its Influence in Pathogenesis. J Mol Biol. 2016 Apr 20. pii: S0022-2836(16)30072-9. doi: 10.1016/j.jmb.2016.04.013. Review.

3. Price NL, Goyette-Desjardins G, Nothaft H, Valguarnera E, Szymanski CM, Segura M, Feldman MF. Glycoengineered Outer Membrane Vesicles: A Novel Platform for Bacterial Vaccines. Sci Rep. 2016 Apr 22;6:24931. doi: 10.1038/srep24931.

4. Roier S, Zingl FG, Cakar F, Durakovic S, Kohl P, Eichmann TO, Klug L, Gadermaier B, Weinzerl K, Prassl R, Lass A, Daum G, Reidl J, Feldman MF, Schild S. A novel mechanism for the biogenesis of outer membrane vesicles in Gram-negative bacteria. Nat Commun. 2016 Jan 25;7:10515. doi: 10.1038/ncomms10515. 

5. Harding CM, Kinsella RL, Palmer LD, Skaar EP, Feldman MF. Medically Relevant Acinetobacter Species Require a Type II Secretion System and Specific Membrane-Associated Chaperones for the Export of Multiple Substrates and Full Virulence. PLoS Pathog. 2016 Jan 14;12(1):e1005391. doi: 10.1371/journal.ppat.1005391. eCollection 2016 Jan.

6. Weber BS, Harding CM, Feldman MF. Pathogenic Acinetobacter: from the Cell Surface to Infinity and Beyond. J Bacteriol. 2015 Dec 28;198(6):880-7. doi: 10.1128/JB.00906-15. Review.

7. Elhenawy W, Scott NE, Tondo ML, Orellano EG, Foster LJ, Feldman MF. Protein O-linked glycosylation in the plant pathogen Ralstonia solanacearum. Glycobiology. 2016 Mar;26(3):301-11. doi: 10.1093/glycob/cwv098. Epub 2015 Nov 3.

8. Schieck E, Lartigue C, Frey J, Vozza N, Hegermann J, Miller RA, Valguarnera E, Muriuki C, Meens J, Nene V, Naessens J, Weber J, Lowary TL, Vashee S, Feldman MF, Jores J. Galactofuranose in Mycoplasma mycoides is important for membrane integrity and conceals adhesins but does not contribute to serum resistance. Mol Microbiol. 2016 Jan;99(1):55-70. doi: 10.1111/mmi.13213. Epub 2015 Oct 14.

9. Weber BS, Ly PM, Irwin JI, Pukatzki S, Feldman, MF. 2105. A multidrug resistance plasmid contains the molecular switch for type VI secretion in Acinetobacter baumannii. Proc. Natl. Acad. Of Sciences (PNAS). doi:10.1073/ pnas.1502966112.

10. Harding CM, Nasr MA, Kinsella RL, Scott NE, Foster LJ, Weber BS, Fiester SE, Actis LA, Tracy EN, Munson RS Jr, Feldman MF. Acinetobacter strains carry two functional oligosaccharyltransferases, one devoted exclusively to type IV pilin, and the other one dedicated to O-glycosylation of multiple proteins. Mol Microbiol. 2015 Mar 2. doi: 10.1111/mmi.12986.

11. Roier S, Blume T, Klug L, Wagner GE, Elhenawy W, Zangger K, Prassl R, Reidl J, Daum G, Feldman MF, Schild S. A basis for vaccine development: Comparative characterization of Haemophilus influenzae outer membrane vesicles. Int J Med Microbiol. 2014 Dec 18. 1438-4221(14)00164-7.

12. Melli LJ, Ciocchini AE, Caillava AJ, Vozza N, Chinen I, Rivas M, Feldman MF, Ugalde JE, Comerci DJ Serogroup-specific bacterial engineered glycoproteins as novel antigenic targets for diagnosis of Shiga toxin-producing Escherichia coli-associated hemolytic uremic syndrome. J Clin Microbiol. 2014 Dec 3. pii: JCM.02262-14.

13. Garcia-Quintanilla F, Iwashkiw JA, Price NL, Stratilo C, Feldman MF. Production of a recombinant vaccine candidate against Burkholderia pseudomallei exploiting the bacterial N-glycosylation machinery. Front Microbiol. 2014 Jul 29;5:381.

14. Ciocchini AE, Serantes DA, Melli LJ, Guidolin LS, Iwashkiw JA, Elena S, Franco C, Nicola AM, Feldman MF, Comerci DJ, Ugalde JE. A bacterial engineered glycoprotein as a novel antigen for diagnosis of bovine brucellosis. Vet Microbiol. 2014 Aug 27;172(3-4):455-65.

15. Scott NE, Kinsella RL, Edwards AV, Larsen MR, Dutta S, Saba J, Foster LJ, Feldman MF. Diversity Within the O-linked Protein Glycosylation Systems of Acinetobacter Species. Mol Cell Proteomics. 2014 Sep;13(9):2354-70

16. Elhenawy W, Debelyy MO, Feldman MF. 2014. Preferential packing of acidic glycosidases and proteases into Bacteroides outer membrane vesicles. mBio 2014. 5(2):e00909-14. doi:10.1128/mBio.00909-14.

17. Lithgow KV, Scott NE, Iwashkiw JA, Thomson ELS, Foster LJ, Feldman MF, and Dennis JJ. A general protein O-glycosylation system within the Burkholderia cepacia complex is involved in motility and virulence. Mol Microbiol. 2014. doi:10.1111/mmi.12540.

18. Musumeci MA, Faridmoayer A, Watanabe Y, and Feldman MF. Evaluating the role of conserved amino acids in bacterial O-oligosaccharyltransferases by in vivo, in vitro, and limited proteolysis assays. Glycobiology. 2014. 24:39-50.

19. Madsen JA, Ko BJ, Xu H, Iwashkiw JA, Robotham SA, Shaw JB, Feldman MF, and Brodbelt JS. Concurrent automated sequencing of the glycan and peptide portions of O-linked glycopeptide anions by ultraviolet photodissociation mass spectrometry. Anal Chem. 2013. 85:9253-61.

20. Lees-Miller R, Iwashkiw J, Scott NE, Seper A, Vinogradov E, Schild S, and Feldman MF. A common pathway for O-linked protein-glycosylation and synthesis of capsule in Acinetobacter baumannii. Mol Microbiol. 2013. 89:816-30..

21. Iwashkiw JA, Vozza NF, Kinsella RL, and Feldman MF. Pour some sugar on it: the expanding world of bacterial protein O-linked glycosylation. Mol Microbiol. 2013. 89:14-28.

22. Musumeci MA, Hug I, Scott NE, Ielmini MV, Foster LJ, Wang PG, and Feldman MF. “In vitro activity of Neisseria meningitidis PglL O-oligosaccharyltransferase with diverse synthetic lipid donors and a UDP-activated sugar”. J. Biol. Chem. 2013. 288:10578-87.

23. Ciocchini AE, Rey Serantes DA., Melli LJ, Iwashkiw JA, Deodato B, Wallach J, Feldman MF, Ugalde JE, and Comerci DJ. Development and Validation of a Novel Diagnostic Test for Human Brucellosis Using a Glyco-engineered Antigen Coupled to Magnetic Beads. PLoS Negl Trop Dis 2013. 7(2): e2048. doi:10.1371/journal.pntd.0002048.

24. Weber BS, Miyata ST, Iwashkiw JA, Mortensen BL, Skaar EP, Pukatzki S, and Feldman MF. Genomic and Functional Analysis of the Type VI Secretion System in Acinetobacter. PLoS One. 2013. 8(1):e55142. doi: 10.1371/journal.pone.0055142.

25. Roier S, Schild-Prüfert K, Iwashkiw J, Feldman MF, Krohne G, Reidl J, and Schild S. “Intranasal immunization with nontypeable Haemophilus influenzae outer membrane vesicles induces cross-protective immunity in mice”. PLoS One. 2012. 7(8):e42664. doi: 10.1371/journal.pone.0042664.

26. Iwashkiw J, Seper A , Weber BS, Scott NE, Vinogradov E, Stratilo C, Reiz B., Cordwell SJ, Whittal R, Schild S, and Feldman MF. “Identification of a General O-linked Protein Glycosylation System in Acinetobacter baumannii and its Role in Virulence and Biofilm Formation”. PLoS Pathog. 2012 Jun;8(6):e1002758.

27. McMahon KJ, Castelli ME, García Véscovi E, and Feldman MF. “Biogenesis of outer membrane vesicles in Serratia marcescens is thermoregulated and can be induced by activation of the Rcs phosphorelay system”. J Bacteriol. 2012. 194:3241-9.

28. Gebhart C, Ielmini MV, Reiz B, Price NL, Aas FE, Koomey M, and Feldman MF. “Characterization of exogenous bacterial oligosaccharyltransferases in Escherichia coli reveals he potential for O-linked protein glycosylation in Vibrio cholerae and Burkholderia thailandensis..” Glycobiology 2012. 22:962-74.

29. Charbonneau ME, Côté1, JP, Haurat, MF, Reiz B, Crépin S, Berthiaume1 F, Dozois CM, Feldman MF, and Mourez M. A structural motif is the recognition site for a new family of bacterial protein O-glycosyltransferases. Molecular Microbiology 2012, Feb 5. doi: 10.1111/j.1365-2958.2012.07973.x.

30. Iwashkiw JA, Fentabil MA, Faridmoayer A, Mills DC, Peppler M, Czibener C, Ciocchini AE, Comerci DJ, Ugalde JE, and Feldman MF. Exploiting the Campylobacter jejuni Protein Glycosylation System for Glycoengineering Vaccines and Diagnostic Tools Directed Against Brucellosis. Microb Cell Fact. 2012 Jan 25;11(1):13.

31. Hug I, Zheng B, Reiz B, Whittal R, Fentabil MA, Klassen JS, and Feldman MF. Exploiting bacterial glycosylation machineries for the synthesis of a Lewis antigen-containing glycoprotein. Journal of Biological Chemistry 2011 Aug 30.

32. Haurat MF, Aduse-Opoku J, Dorobantu L, Rangarajan M, Gray M, Curtis MA, and Feldman, MF. “Selective sorting of cargo proteins into bacterial vesicles.” Journal of Biological Chemistry, Journal of Biological Chemistry 2011 Jan 14;286(2):1269-76. Epub 2010 Nov 5.

33. Ielmini MV and Feldman M.F Desulfovibrio desulfuricans PglB homolog possesses oligosaccharyltransferase activity with relaxed glycan specificity and distinct protein acceptor sequence requirements. Glycobiology. 2010 Nov 22.

34. Hug I, Couturier MR, Rooker MM, Taylor DE, Stein M, and Feldman MF. “Helicobacter pylori Lipopolysaccharide Is Synthesized via a Novel Pathway with an Evolutionary Connection to Protein N-Glycosylation.” 2010. PLoS Pathog:6(3):e1000819. doi:10.1371/journal.ppat.1000819.

35. Poulin MB, Nothaft H, Hug I, Feldman MF, Szymanski CM, and Lowary TL. “Characterization of a bifunctional pyranose-furanose mutase from Campylobacter jejuni 11168.” 2010 Jan 1. Journal of Biological Chemistry:285(1):493-501. Epub 2009 Nov 3.

36. Faridmoayer A, Fentabil MA, Haurat MF, Yi W, Woodward R, Wang PG, and Feldman MF. “Extreme substrate promiscuity of the Neisseria oligosaccharyl transferase involved in protein O-glycosylation.” 2008 Dec 12. Journal of Biological Chemistry:283(50):34596-604. Epub 2008 Oct 17.

37. Castelli ME, Fedrigo GV, Clementin AL, Ielmini MV, Feldman MF, and Garcia Vescovi E. “Enterobacterial common antigen integrity is a checkpoint for flagellar biogenesis in Serratia marcescens.” 2008. Journal of Bacteriology:190(1):213-20.

38. Faridmoayer A, Fentabil MA, Mills DC, Klassen JS, and Feldman MF. “Functional Characterization of Bacterial Oligosaccharyltransferases Involved in O-Linked Protein Glycosylation.” 2007. Journal of Bacteriology:189(22):8088-8098.

39. Kowarik M, Numao S, Feldman MF, Schulz BL, Callewaert N, Kiermaier E, Catrein I, and Aebi M. “N-Linked Glycosylation of Folded Proteins by the Bacterial Oligosaccharyl-transferase.” 2006. Science:314:1148-1150. (The first three authors contributed equally to this work)..

40. Letzelter M, Sorg I, Mota LJ, Meyer S, Stalder J, Feldman MF, Kuhn M, Callebaut I, and Cornelis GR. “The discovery of SycO highlights a new function for type III secretion effector chaperones.” 2006. EMBO J.:12:25(13):3223-33.

41. Wacker M, Feldman MF, Callewaert N, Kowarik M, Clarke, BT, Pohl N, Hernandez M, Vines E, Valvano MA, Whitfield C, and Aebi M. “Substrate Specificity of Bacterial Oligosaccharyltransferase Suggests a Common Transfer Mechanism for the Bacterial and Eukaryotic Systems.” (The first two authors contributed equally to this work). 2006. Proc Natl Acad Sci USA:103:7088-93.

42. Alaimo C, Catrein I, Morf L, Marolda CL, Callewaert N, Valvano MA, Feldman MF, and Aebi M. “Two distinct but interchangeable mechanisms for flipping of lipid-linked oligosaccharides.” 2006. EMBO J.:8 25(5):967-76.

43. Feldman MF, Wacker M, Hernandez M, Hitchen P, Marolda CL, Kowarik M, Dell A, Valvano MA, and Aebi M. “Engineering diverse N-linked glycoprotein in Escherichia coli.” 2005. Proc Natl Acad Sci USA:102 (8):3016-3021.

44. Feldman MF, Müller S, Wüest E, and Cornelis GR. “The chaperone SycE allows secretion of YopE-DHFR hybrids by the type III secretion system in Yersinia enterocolitica.” 2002. Molecular Microbiology:46(4):1183-1197.

45. Ugalde JE, Czibener C, Feldman MF, and Ugalde RA. “Identification and characterization of the Brucella abortus phosphoglucomutase gene: Role of lipopolysaccharide in virulence and intracellular multiplication.” 2000. Infect. Immun:68(10):5716-23.

46. Feldman MF, Marolda CL, Monteiro MA, Perry MB, Parodi AJ, and Valvano MA. “The activity of a putative translocase (Wzx) involved in Escherichia coli O-antigen assembly is independent of the chemical structure of the O repeat.” 1999. J. Biol. Chem. 274(49):35129-38..

47. Marolda CL, Feldman MF, and Valvano MA. “Genetic organization of the O7-specific lipopolysaccharide biosynthesis cluster of Escherichia coli VW187 (O7:K1).” 1999. Microbiology:145:2485-2495.

48. Serra EC, Krapp AR, Ottado J, Feldman MF, Ceccarelli EA, and Carrillo N. “The precursor of pea ferredoxin NADP+ reductase expressed in Escherichia coli contains bound FAD and is transported into chloroplasts.” 1995. J. Biol. Chem:270(34):19930-19935.

Review Articles:

49. Kinsella RL, Scott NE, Feldman MF. Clinical implications of glycoproteomics for Acinetobacter baumannii.. Expert Rev Proteomics. 2014 Dec 11:1-3. [Epub ahead of print]

50. Haurat MF, Elhenawy W, Feldman MF. Prokaryotic membrane vesicles: new insights on biogenesis and biological roles. Biol Chem. 2014 Aug 28 doi: 10.1515/hsz-2014-0183.

51. Hug I and Feldman M.F. Analogies and homologies in lipopolysaccharide and glycoprotein biosynthesis in bacteria. Glycobiology. 2011 Feb;21(2):138-51. Epub 2010 Sep 24.

52. Feldman MF and Cornelis GR. “The multitalented family of type III secretion chaperones: All you can do with 15 kDa.” 2003. FEMS Microbiology Lett.:19(2):151-158.

53. Müller S, Feldman MF, and Cornelis GR. “The type III secretion system of Gram-negative bacteria: A potential therapeutic target?” 2001. Expert. Opin. Ther. Targets:5(3):27-329.  

Book Chapters:

54. Kowarik M and Feldman MF. “Getting Bacteria to Glycosylate.” Post-translational Modification of Protein Biopharmaceuticals. Edited by Gary Walsh. 2009. WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. ISBN: 978-3-527-32074-5.

55. Feldman MF. “Industrial exploitation by genetic engineering of bacterial glycosylation systems.” 2009. In Microbial Glycobiology. Editor A Moran. Elsevier: 904-914.

56. Faridmoayer A and Feldman MF. “Bacterial Protein Glycosylation.” In Comprehensive Natural Products Chemistry-II. Editor PG Wang. Elsevier 2009. Volume 6: 351-380.

Active Grants:

“O-linked protein glycosylation in bacteria”. PI: Mario Feldman. NSERC (Natural Sciences and Engineering Research Council of Canada) – Discovery grant-2011-2016 – $200,000.

“Reducing Salmonella and Clostridium in poultry”. PI: Christine Szymanski. Co PI; Mario Feldman. Alberta Livestock and Meat Agency.-2013-2016. – $337,000.

Start Up grant. PI: Mario Feldman. Washington University School of Medicine, St Louis. 2015-2018. – $1,000,000.

“Faculty Diversity Scholars Award”. PI: Mario Feldman Washington University School of Medicine, St Louis. 2015-2018. $210,000.


Acinetobacter O-Oligosaccharyltransferases and Uses Thereof” PCT/CA2016/050208 filed February 26, 2016
Inventors; Feldman MF and Nasar M.

Methods and Systems for O-glycosylating Proteins. PCT/US07/87323
Inventors: Feldman MF and Faridmoayer A
Status: The patent application entered the National phase in the US, Canada, Australia, EU and Japan. Licensed to Glycovaxyn(Zurich, Swizterland). Glycovaxyn was founded in 2004 as a spin-off company from the Swiss Federal Institute of Technology (ETH). Glycovaxyn is developing bioconjugate vaccines candidates that targets some of the most common and severe bacterial pathogens.

Method of Diagnosing Bacterial Infections Using Bacterial Glycoproteins.PCT/CA2012/050549 filed August 2012.
Inventors: Feldman MF, Ugalde JE, Iwashkiw J, and Ciocchini A

Glycoengineered Outer Membrane Vesicles and Use Thereof as Vaccines.Provisional patent serial number of 61/639,340 filed on April 27, 2012.
Inventors: Feldman MF, Price, NL, Garcia-Quintanilla, F, and Iemini MV

Invited Talks:

June. Invited talk, FASEB Microbial Glycobiology Conference.  (West Palm Beach, FL)
March. Invited talk. Department of Molecular Microbiology. Washington University, (St. Louis, MO)

September: Plenary Speaker. International Symposium in the biology of Acinetobacter. Athens, Greece.
September: Meeting of the Latin American Society of Glycobiology (Guanajuato, Mexico).
Jan: Invited talk, University of Utah.  Salt Lake City (USA).

Dec: Invited Talk. Universidad Nacional de San Martin (Buenos Aires Argentina)
Abril: Plenary speaker: Argentina Society of Glycobiology (inaugural meeting)
March: Invited Talk. New England Biolabs (NEB). Boston, USA.
Feb: Invited Talk, Centre québécois de valorization des biotechnologies (Montréal, QC)

Oct: Invited Talk, Immunet Seminar Series, University of Alberta (Edmonton, AB)
Aug: Invited Talk, Segundo Congreso Latinoamericano de Glicobiología (Mexico City, Mexico)
July: Invited Talk, 17th EuroCarb Symposium (Tel Aviv, Israel)
Jan: Peptalk, Choosing, Designing, & Optimizing Hosts & Platforms (Palm Springs, CA)

Nov: Invited talk, Tel Aviv University. (Israel).
Nov: Invited talk, Department of Chemistry. Technion. Haifa (Israel).
Nov: Invited talk, Weizmann Institute. Rehovot (Israel).
Nov: Invited talk, Ben Gurion University of the Negev. BeerSheba (Israel).
Sept: Invited talk, University of Guelph, Canada.
Sept: Invited talk, Queens University (Belfast, Ireland)
June: Invited talk, University of Graz (Graz, Switzerland)
June: Farewell Symposium in honor of Prof. Guy Cornelis. Biozentrum (Basel, Switzerland)
May: AGC 8th Annual National Carbohydrate Symposium (Banff, AB)
Jan: Invited Talk, University of Texas (Austin, TX)

Dec: Invited Talk, Institute Leloir (Buenos Aires, Argentina)
Dec: Invited Talk, Universidad Nacional de San Martin (Buenos Aires, Argentina)
Nov: Annual meeting Society of Glycobiology (Seattle, WA)
Sept: CSHL conference in Bacterial Pathogenesis (Cold Springs Harbor, NY)
Aug: 16th Intl Workshop Campylobacter, Helicobacter, & Related Organisms (Vancouver, BC)
July: 16th EuroCarb Symposium (Sorrento, Italy)
June: FASEB Conference Microbial Polysaccharides of Medical Interest (Carefree, AZ)
May: Gordon Conference on Glycobiology. (Lucca (Barga), Italy)

Sept: Invited Talk, Swiss Federal Institute of Technology (ETH) (Zurich, Switzerland)
Sept: 4th Baltic Meeting on Microbial Carbohydrates (Hyytiälä Forestry Field Station, Finland)
Sept: Society of General Microbiology (UK) (Nottingham, UK)
June: 60th Annual Conference of the Cdn Society of Microbiologists (Hamilton, ON)
May: 110th ASM General Meeting (San Diego, CA)
May: Invited Talk, Harvard Medical School (Boston, MA)
May: Invited Talk, Pfizer. (Pearl River, NY)
Feb: Invited Talk, WRCE (Galveston, TX)

Dec: Invited Talk, University of Alberta (Edmonton, AB)
Nov: 45th Annual SAIB meeting (Tucuman, Argentina)
Oct: Invited Talk, School of Dental Medicine. Boston University (Boston, MA)
Sept: Society of General Microbiology (UK) (Edinburgh, Scotland)
June: Gordon Conference on Carbohydrates (Tilton, NH)
Apr: Invited Talk, U of Natural Resources & Applied Life Sciences (Vienna, Austria)
Feb: Invited Talk, Biozentrum, University of Basel (Basel, Switzerland)
Feb: Invited Talk, Instituto de Tecnologia Química e Biológica (Lisbon, Portugal)
Feb: Invited Talk, ETH Institute of Microbiology (Zurich, Switzerland)
Jan: Invited Talk, Novartis Vaccines and Diagnostics (Siena, Italy)
Jan: Gordon Conference on Glycobiology (Ventura, CA)

Dec: Invited Talk, Universidad Nacional de Rosario (Rosario, Argentina)
Oct: Invited Talk, McMaster University (Hamilton, ON)
July: Gordon Conference on Microbial Toxins and Pathogenicity (Andover, NH)
Apr: Invited Talk, GlycoVaxyn (Zurich, Switzerland)
Mar: Invited Talk Mol. Biology & Neuroscience, University of Oslo (Oslo, Norway)
Mar: 162nd Society for General Microbiology (Edinburgh, Scotland)

Dec: Invited Talk, Universidad Nacional de San Martin (Buenos Aires, Argentina)
Nov: Invited Talk, Immunet Seminar Series, University of Alberta (Edmonton, AB)
Sept: Invited Talk, Glycodays, National Research Council (Ottawa, ON)

Dec: Invited Talk, Instituto Fundacion Leloir, (Buenos Aires, Argentina)
Dec: Invited Talk, Universidad Nacional de Rosario, (Rosario, Argentina)
Oct: Invited Talk, Department of Cell Biology. University of Alberta (Edmonton, AB)
July: Invited Talk, National Institutes of Health (Bethesda, MA)
June: FASEB Microbial Polysaccharides of Medical… (Tucson, AZ)
May: UAUC Conference (Banff, AB)

Mar: Gordon Research Conference (Ventura, CA)
Mar: Invited Talk, CCRC, University of Georgia (Athens, GA)

June: Institute for Biological Sciences, National Research Council (Ottawa, ON)