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Sara Lawhon

Associate Professor

Curriculum Vitae

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Phone: (979) 218-7156

Mailstop: 4467

Department: VTPB

Photo of Lawhon, Sara


  • Ph.D. Comparative Biomedical Science, North Carolina State University 2003
  • D.V.M. Veterinary Medicine, Texas A&M University 1997
  • B.S. Veterinary Science, Texas A&M University 1993
  • B.S. Biomedical Science, Texas A&M University 1991


  • Diplomate , American College of Veterinary Microbiologists 2009

Scholarly Interests

My work centers on understanding how bacteria cause disease in people and animals with the goal of improving animal and human health. My laboratory group studies antimicrobial resistance and stewardship and Salmonella and Staphylococcus pathogenesis. We are particularly interested in how bacteria communicate with each other (quorum sensing) and how they respond to environmental signals found in the host.


Antimicrobial activity of gallium maltolate against Staphylococcus aureus and methicillin-resistant S. aureus and Staphylococcus pseudintermedius: An in vitro study.
Arnold CE, Bordin A, Lawhon SD, Libal MC, Bernstein LR, Cohen ND.
Vet Microbiol. 2011 Sep; .
PMID: 21963417 [PubMed - as supplied by publisher]
Enhancing the role of veterinary vaccines reducing zoonotic diseases of humans: Linking systems biology with vaccine development.
Adams LG, Khare S, Lawhon SD, Rossetti CA, Lewin HA, Lipton MS, Turse JE, Wylie DC, Bai Y, Drake KL.
Vaccine. 2011 Sep; 29(41):7197-206.
PMID: 21651944 [PubMed - in process]
Multi-comparative systems biology analysis reveals time-course biosignatures of in vivo bovine pathway responses to B.melitensis, S.enterica Typhimurium and M.avium paratuberculosis.
Adams LG, Khare S, Lawhon SD, Rossetti CA, Lewin HA, Lipton MS, Turse JE, Wylie DC, Bai Y, Drake KL.
BMC Proc. 2011 Jun; 5 Suppl 4:S6.
PMID: 21645321 [PubMed]
Detection of strain variation in isolates of Rhodococcus equi from an affected foal using repetitive sequence-based polymerase chain reaction.
Bolton T, Kuskie K, Halbert N, Chaffin K, Healy M, Lawhon S, Jackson A, Cohen N.
J Vet Diagn Invest. 2010 Jul; 22(4):611-5.
PMID: 20622235 [PubMed - indexed for MEDLINE]
The Salmonella enterica serotype Typhi Vi capsular antigen is expressed after the bacterium enters the ileal mucosa.
Tran QT, Gomez G, Khare S, Lawhon SD, Raffatellu M, Bäumler AJ, Ajithdoss D, Dhavala S, Adams LG.
Infect Immun. 2010 Jan; 78(1):527-35.
PMID: 19901065 [PubMed - indexed for MEDLINE]
Bayesian Modeling of MPSS Data: Gene Expression Analysis of Bovine Salmonella Infection.
Dhavala SS, Datta S, Mallick BK, Carroll RJ, Khare S, Lawhon SD, Adams LG.
J Am Stat Assoc. 2010 Sep; 105(491):956-967.
PMID: 21165171 [PubMed]
Antimicrobial Activity of Tulathromycin and 14 Other Antimicrobials Against Virulent Rhodococcus equi In Vitro.
Carlson K, Kuskie K, Chaffin K, Libal M, Giguere S, Lawhon S, Cohen N.
Vet Ther. 2010 Sum; 11(2):E1-9.
PMID: 20957614 [PubMed - in process]
Subcutaneous infection of a cat by Colletotrichum species.
Winter RL, Lawhon SD, Halbert ND, Levine GJ, Wilson HM, Daly MK.
J Feline Med Surg. 2010 Oct; 12(10):828-30.
PMID: 20813572 [PubMed - indexed for MEDLINE]
Morphologic and cytokine profile characterization of Salmonella enterica serovar typhimurium infection in calves with bovine leukocyte adhesion deficiency.
Nunes JS, Lawhon SD, Rossetti CA, Khare S, Figueiredo JF, Gull T, Burghardt RC, Bäumler AJ, Tsolis RM, Andrews-Polymenis HL, Adams LG.
Vet Pathol. 2010 Mar; 47(2):322-33.
PMID: 20118318 [PubMed - indexed for MEDLINE]
Brucella melitensis global gene expression study provides novel information on growth phase-specific gene regulation with potential insights for understanding Brucella:host initial interactions.
Rossetti CA, Galindo CL, Lawhon SD, Garner HR, Adams LG.
BMC Microbiol. 2009 May; 9:81.
PMID: 19419566 [PubMed - indexed for MEDLINE]
Contribution of flagellin pattern recognition to intestinal inflammation during Salmonella enterica serotype typhimurium infection.
Winter SE, Thiennimitr P, Nuccio SP, Haneda T, Winter MG, Wilson RP, Russell JM, Henry T, Tran QT, Lawhon SD, Gomez G, Bevins CL, Rüssmann H, Monack DM, Adams LG, Bäumler AJ.
Infect Immun. 2009 May; 77(5):1904-16.
PMID: 19237529 [PubMed - indexed for MEDLINE]
Salmonella enterica serovar Typhimurium-induced internalization and IL-8 expression in HeLa cells does not have a direct relationship with intracellular Ca(2+) levels.
Figueiredo JF, Barhoumi R, Raffatellu M, Lawhon SD, Rousseau B, Burghardt RC, Tsolis RM, Bäumler AJ, Adams LG.
Microbes Infect. 2009 Sep; 11(10-11):850-8.
PMID: 19450704 [PubMed - indexed for MEDLINE]
Early phase morphological lesions and transcriptional responses of bovine ileum infected with Mycobacterium avium subsp. paratuberculosis.
Khare S, Nunes JS, Figueiredo JF, Lawhon SD, Rossetti CA, Gull T, Rice-Ficht AC, Adams LG.
Vet Pathol. 2009 Jul; 46(4):717-28.
PMID: 19276052 [PubMed - indexed for MEDLINE]
Salmonella enterica Typhimurium SipA induces CXC-chemokine expression through p38MAPK and JUN pathways.
Figueiredo JF, Lawhon SD, Gokulan K, Khare S, Raffatellu M, Tsolis RM, Bäumler AJ, McCormick BA, Adams LG.
Microbes Infect. 2009 Feb; 11(2):302-10.
PMID: 19114119 [PubMed - indexed for MEDLINE]
SdiA, an N-acylhomoserine lactone receptor, becomes active during the transit of Salmonella enterica through the gastrointestinal tract of turtles.
Smith JN, Dyszel JL, Soares JA, Ellermeier CD, Altier C, Lawhon SD, Adams LG, Konjufca V, Curtiss R 3rd, Slauch JM, Ahmer BM.
PLoS One. 2008 Jul; 3(7):e2826.
PMID: 18665275 [PubMed - indexed for MEDLINE]
The capsule encoding the viaB locus reduces interleukin-17 expression and mucosal innate responses in the bovine intestinal mucosa during infection with Salmonella enterica serotype Typhi.
Raffatellu M, Santos RL, Chessa D, Wilson RP, Winter SE, Rossetti CA, Lawhon SD, Chu H, Lau T, Bevins CL, Adams LG, Bäumler AJ.
Infect Immun. 2007 Sep; 75(9):4342-50.
PMID: 17591794 [PubMed - indexed for MEDLINE]
Host restriction of Salmonella enterica serotype Typhi is not caused by functional alteration of SipA, SopB, or SopD.
Raffatellu M, Sun YH, Wilson RP, Tran QT, Chessa D, Andrews-Polymenis HL, Lawhon SD, Figueiredo JF, Tsolis RM, Adams LG, Bäumler AJ.
Infect Immun. 2005 Dec; 73(12):7817-26.
PMID: 16299271 [PubMed - indexed for MEDLINE]
SipA, SopA, SopB, SopD, and SopE2 contribute to Salmonella enterica serotype typhimurium invasion of epithelial cells.
Raffatellu M, Wilson RP, Chessa D, Andrews-Polymenis H, Tran QT, Lawhon S, Khare S, Adams LG, Bäumler AJ.
Infect Immun. 2005 Jan; 73(1):146-54.
PMID: 15618149 [PubMed - indexed for MEDLINE]
Global regulation by CsrA in Salmonella typhimurium.
Lawhon SD, Frye JG, Suyemoto M, Porwollik S, McClelland M, Altier C.
Mol Microbiol. 2003 Jun; 48(6):1633-45.
PMID: 12791144 [PubMed - indexed for MEDLINE]
Intestinal short-chain fatty acids alter Salmonella typhimurium invasion gene expression and virulence through BarA/SirA.
Lawhon SD, Maurer R, Suyemoto M, Altier C.
Mol Microbiol. 2002 Dec; 46(5):1451-64.
PMID: 12453229 [PubMed - indexed for MEDLINE]
Regulation of Salmonella enterica serovar typhimurium invasion genes by csrA.
Altier C, Suyemoto M, Lawhon SD.
Infect Immun. 2000 Dec; 68(12):6790-7.
PMID: 11083797 [PubMed - indexed for MEDLINE]

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