Amanda L. Lewis, Ph.D.

Assistant Professor
Molecular Microbiology

Molecular Microbiology and Microbial Pathogenesis Program
Biochemistry, Biophysics, and Structural Biology Program
Molecular Genetics and Genomics Program

  • 314-286-0016

  • 314-286-0019

  • 8230

  • 10303 BJC Institute of Health



  • bacterial pathogenesis, reproductive and perinatal infection

  • Pathogenic and commensal bacterial-host interactions relevant to women`s health

Research Abstract:

We study the vaginal microbiota and its importance for women`s health. Most women have lactobacilli in their vaginas, a situation which is widely believed to have beneficial properties for the host. But many women (1/3 of all women in U.S.) show another pattern, with few lactobacilli and instead much higher levels of a diverse mixture of bacteria many of which can cause serious infections on their own. We are developing models of infections and co-infections and helping to define some of the basic physiology of vaginal bacteria with the goal of understanding both how they interact with the host and other bacteria to encourage disease.

Selected Publications:


(13) Weiman S, Uchiyama S, Lin FY, Chaffin D, Varki A, Nizet V, Lewis AL.* 2010. O-Acetylation of Sialic Acid on Group B Streptococcus Inhibits Neutrophil Suppression and Virulence. Biochem J.428(2):163-8.

(14) Lewis, A.L.; Lubin, J.B.; Argade, S.; Naidu, N.; Choudhury, B.; and Boyd, E.F. 2011. Genomic and Metabolic Profiling of Nonulosonic Acids in Vibrionaceae reveal Biochemical Phenotypes of Allelic Divergence in V. vulnificus Appl. Environ. Microbiol. Aug;77(16):5782-93. PMID: 21724895

(15) Kline, K.A.; Schwartz, D.J.; Lewis, W.G.; Hultgren, S.J.; Lewis, A.L.* 2011. Immune Activation and Suppression by Group B Streptococcus in a Murine Model of Urinary Tract Infection. Infect Immun. Sep;79(9):3588-95. PMID: 21690238

(16) Lewis, WG; Robinson, LS; Perry, JC; Bick, JL; Peipert, JF; Allsworth, JE; Lewis, AL. 2012.* Hydrolysis of Secreted Immunoglobulin A (IgA) in ex Vivo and Biochemical Models of Bacterial Vaginosis. J Biol Chem. 287(3): 2079-89. PMID: 22134918
• Highlighted in the ASBMB Blog “Wild-types”

(17) Ricaldi,JN; Matthias, MA; Vinetz, JM; Lewis, AL.* 2012 Expression of Sialic Acids and other Nonulosonic Acids in Leptospira. BMC Microbiol. 12 (1):161. PMID: 22853805

(18) Kline, K.A.; Schwartz, D.J.; Gilbert, NM; Hultgren, S.J.; Lewis, A.L.* Immune Modulation by Group B Streptococcus Influences Host Susceptibility to Urinary Tract Infection by Uropathogenic E. coli. Infect. Immun. 2012 Dec;80(12):4186-94. PMID 22988014

(19) Lewis AL*, Lewis WG. 2012. Host Sialoglycans and Bacterial Sialidases: A Mucosal Perspective. Cell Microbiol. 2012 14(8):1174-82. PMID: 22519819


(20) Gilbert, NM; O’Brien, V; Hultgren, S; Macones, GA; Lewis, WG; Lewis, AL.* Urinary Tract Infection as a Preventable Cause of Pregnancy Complications: Opportunities, Challenges, and a Global Call to Action. Global Adv. Health Med. 2013;2(5):59-69. PMID: 24416696

ϖ The only comprehensive review in the literature that covers the topic of UTI in pregnancy from a global perspective

(21) Gilbert, NM; Lewis, WG; Robinson, LS; Lewis, AL.* Clinical Features of Bacterial Vaginosis in a Murine Model of Vaginal Infection with Gardnerella vaginalis. PLoS One. 2013;8(3):e59539. doi: 10.1371/journal.pone.0059539. Epub 2013 Mar 19. PMID: 23527214

ϖ Highlighted in Town and Style magazine and Fit Pregnancy Magazine
ϖ 14,338 views and 27 citations as of June, 2017

(22) Lewis, WG; Robinson, LS; Gilbert, NM; Lewis, AL.* Degradation, Foraging, and Depletion of Mucus Sialoglycans by the Vaginal-Adapted Actinobacterium Gardnerella vaginalis. J Biol Chem. 2013 Apr 26;288(17):12067-79. PMID: 23479734

ϖ Faculty of 1000 Recommended,
ϖ Highlighted in Town and Style magazine and Fit Pregnancy Magazine
ϖ Featured on:,


(23) Kline, K.A.; Schwartz, D.J.; Gilbert, NM; Lewis, A.L.* Impact of Host Age and Parity on Susceptibility to Severe Urinary Tract Infection in a Murine Model. PLoS One. 2014 May 16;9(5):e97798. PMID: 24835885

(24) Lubin, J.B.; Lewis, W.G.; Gilbert, N.M.; Almagro-Moreno, S.; Boyd, E.F.; Lewis, A.L* Host-like Carbohydrates promote Bloodstream Survival of Vibrio vulnificus in vivo. Infect Immun. 2015 Aug;83(8):3126-36. Epub 2015 May 26.PMID: 26015477


(25) Kline, KA*; Lewis, AL.* Gram-Positive Uropathogens, Polymicrobial Urinary Tract Infection, and the Emerging Microbiota of the Urinary Tract. Microbiology Spectrum. 2016, March 11; 4(2) *Co-corresponding authors

(26) Yamaguchi, M; Hirose, Y, Nakata, M; Uchiyama, S; Yamaguchi, Y; Goto, K; Sumitomo, T; Lewis, AL; Kawabata, S; Nizet, V. Evolutionary Inactivation of a Sialidase in group B Streptococcus. Sci Rep.2016 Jun 29;6:28852. doi: 10.1038/srep28852. PMID 27352769

(27) Lewis, WG* and Lewis, AL.* A New Catalog of Microbiological Tools for Women`s Infectious Disease Research. Genome Announc.2016 Sep 29;4(5). pii: e00890-16. doi: 10.1128/genomeA.00890-16. PMID 27688331 *Co-corresponding authors

(28) Robinson, LR; Perry, JC; Lek, S; Wollam, A; Sodergren, E; Weinstock, G; Lewis, AL*; Lewis, WG*. Draft Genome Sequences of 15 Gardnerella vaginalis Strains Isolated from the Vaginas of Women with and without Bacterial Vaginosis. Genome Announc. 2016 Sep 29;4(5). pii: e00879-16. doi: 10.1128/genomeA.00879-16. PMID 27688326 *Co-corresponding authors

(29) Lewis, AL*; Deitzler, G; Ruiz, M; Weimer, C; Park, S; Robinson, L; Wollam, A; Hallsworth-Pepin, K; Mitreva, M; Lewis; WG.* Draft Genome Sequences of 11 Human Vaginal Isolates of Actinobacteria. GenomeAnnounc. 2016 Sep 29;4(5). pii: e00887-16. doi: 10.1128/genomeA.00887-16. PMID 27688328 *Co-corresponding authors

(30) Deitzler, G; Ruiz, M; Weimer, C; Park, S; Robinson, L; Wollam, A; Hallsworth-Pepin, K; Mitreva, M; Lewis, AL*; Lewis, WG.* Draft Genome Sequences of 14 Firmicutes Isolated from the Human Vagina. Genome Announc. 2016 Sep 29;4(5). pii: e00888-16. doi: 10.1128/genomeA.00888-16. PMID 27688329 *Co-corresponding authors

(31) Deitzler, G; Ruiz, M; Lu, W; Robinson, L; Weimer, C; Park, S; Wollam, A; Hallsworth-Pepin, K; Mitreva, M. Lewis, WG*; Lewis, AL*; Draft Sequences of Seven Gram-Negative Vaginal Bacteria. Genome Announc. 2016 Sep 29;4(5). pii: e00889-16. doi: 10.1128/genomeA.00889-16. PMID 2768833 *Co-corresponding authors

(32) Weimer, C; Deitzler, G; Ruiz, M; Robinson, L; Park, S; Hallsworth-Pepin, K; Mitreva, M; Lewis, W*; Lewis, AL*. Genome Sequences for 12 Bacterial Isolates Obtained from the Urine of Pregnant Women. GenomeAnnounc. 2016 Sep 29;4(5). pii: e00882-16. doi: 10.1128/genomeA.00882-16. PMID 27688327 *Co-corresponding authors

(33) Lewis, AL*; Robinson, LS; Agarwal, K; and Lewis, WG. Discovery and Characterization of de novo Sialic acid Biosynthesis in the Phylum Fusobacterium. Glycobiology.2016 Sep 9. [Epub ahead of print], PMID: 27613803

(34) O`BrienVP, Hannan TJ, Yu L, Livny J, Roberson ED, Schwartz DJ, Souza S, Mendelsohn CL, Colonna M, Lewis AL,HultgrenSJ. A Mucosal Imprint left by Prior Escherichia coli Bladder Infection Sensitizes to Recurrent Disease. Nat Microbiol. 2016 Oct;2:16196 PMID: 27798558


(35) Gilbert NM, O`Brien VP, Lewis AL. Transient microbiota exposures activate dormant Escherichia coli infection in the bladder and drive severe outcomes of recurrent disease. PLoS Pathog. 2017 Mar 30;13(3):e1006238. doi: 10.1371/journal.ppat.1006238. eCollection 2017 Mar. PMID: 28358889

ϖ Chosen as the Editor’s Pick for the March 30, 2017 issue.
ϖ Featured on the May 25th 2017 ASM podcast “This Week in Microbiology”
ϖ General News Media: The Sun (UK), the International Business Times (UK), Metro news (UK), Town & Style Magazine (US)
ϖ Scientific Press: National Science Foundation, , Nature Reviews Urology, the European Medical Journal, the International Federation of Obstetrics and Gynecology, Radio Free Aisa, and by a wide variety of other science news services: Gizmodo, Scimex (Australia/New Zealand), Medical Xpress, Infection Control Today, MilTech, Outbreak News Today, satPRNews, Science Daily.

(36) Lin AE, Autran CA, Szyszka A, Escajadillo T, Huang M, Godula K, Prudden AR, Boons GJ, Lewis AL, Doran KS, Nizet V, Bode L. Human Milk Oligosaccharides Inhibit Growth of group B Streptococcus. J Biol Chem. 2017 Apr 17. pii: jbc.M117.789974. doi: 10.1074/jbc.M117.789974. [Epub ahead of print] PMID: 28416607

(37) Amegashie, CP;; Peipert, JF; Allsworth, JE; Lewis, WG; Lewis, AL. Relationship between Nugent Score and Vaginal Epithelial Exfoliation. PLoS One (in press)

(38) Robinson LS, Lewis WG, Lewis AL. The sialylate O-acetylesterase EstA from gut bacteroides species enables sialidase-mediated cross-species foraging of 9-O-acetylated sialoglycans. J Biol Chem. 2017 May 19. pii: jbc.M116.769232. doi: 10.1074/jbc.M116.769232. [Epub ahead of print]

Last Updated: 6/8/2017 2:25:04 PM

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