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Dr Caitriona Guinane

education and career profile 

Dr Caitriona Guinane graduated from UCC with a BSc (1H) and a PhD in Microbiology. She was a postdoctoral researcher in the University of Edinburgh and was a research officer in Teagasc Food Research Centre, Moorepark for 7 years.  Dr Guinane is currently a lecturer in the Department of Biological Sciences. She has authored 47 peer reviewed manuscripts (including 3 book chapters) and has a H-index = 23; (Google scholar, May 2019). Dr Guinane has been an author on manuscripts published in high impacting journals including Nature Genetics, MBio, PLoS pathogens, Molecular Microbiology, Genome Biology & Evolution, Proceedings in the National Academy of Sciences (PNAS) and Journal of Infectious Diseases.


research interests 

Dr Guinane’s research interests and in the area of gut health, the impact of our intestinal microbiome with a view to probiotic and functional food development.


ongoing research 

  • Development of a microbially-derived therapy against Fusobacterium nucleatum, a bacterial pathogen linked with colorectal cancer. CIT RíSAM funded project (2017-).
  • Athprofoods: Mining the gut microbiome of elite athletes, Teagasc funded project (2018-).

previous research 

  • Identification of bacterial therapies for the prevention of colorectal cancer. Institutes of Ireland funded project IOTI (2014)
  • Modification of Cheddar cheese flavour through the use of surface flora, Teagasc funded project (2013)


  • Guinane CM, Walsh C & PD Cotter (2018). Genomics of Food-borne Microorganisms. Book chapter In Press in Food Microbiology—Fundamentals and Frontiers. 5th ed.
  • Wilson GJ, Tuffs SW, Wee BA, Seoc KS, Park N, Connelley T, Guinane CM, Morrison WI  and JR Fitzgerald (2018). Bovine Staphylococcus aureus superantigens stimulate the entire T 2 cell repertoire of cattle. Infect. Immun. doi:10.1128/IAI.00505-18
  • Guinane CM and Callanan MJ. (2018) Genome sequencing of Microbes. Ref mod in Life sci.
  • Hegarty JW, Guinane CM, Ross RP, Hill C, Cotter PD. (2017) Lack of Heterogeneity in Bacteriocin Production Across a Selection of Commercial Probiotic Products. Probiotics Antimicrob Proteins. 2017 Sep 23. doi: 10.1007/s12602-017-9326-2
  • Bertuzzi AS, Guinane CM, Crispie F, Kilcawley K, McSweeney PLH & MC Rea (2017) Genome Sequence of Staphylococcus saprophyticus DPC 5671, a Strain Isolated from Cheddar Cheese. Genome Announcements. 2017 Apr 20;5(16). pii: e00193-17. doi: 10.1128/genomeA.00193-17.
  • Nilaweera KN, Cabrera-Rubio R, Speakman JR, O'Connor PM, McAuliffe A, Guinane CM, Lawton EM, Crispie F, Aguilera M, Stanley M, Boscaini S, Joyce S, Melgar S, Cryan JF, Cotter PD. Whey protein effects on energy balance link the intestinal mechanisms of energy absorption with adiposity and hypothalamic neuropeptide gene expression. Am J Physiol Endocrinol Metab. 2017 Jul 1;313(1):E1-E11. doi: 10.1152/ajpendo.00356.2016. Epub 2017 Mar 21.
  • Walsh CJ, Guinane CM, O' Toole PW, Cotter PD. (2017) A Profile Hidden Markov Model            to investigate the distribution and frequency of LanB-encoding lantibiotic modification genes in the human oral and gut microbiome. PeerJ. 2017 Apr 27;5:e3254. doi: 10.7717/peerj.3254.
  • Hegarty, JW, Guinane CM, Ross RP, Hill C & PD Cotter (2016). Bacteriocin production: a relatively unharnessed probiotic trait? F1000Res. 5:2587. Review
  • Guinane CM, Lawton EM, O’Connor PM, O’Sullivan O, Hill C, Ross RP & PD Cotter (2016) Effect of bacteriocin bactofencin A on microbial composition in a model of the distal colon. Anaerobe. 2016 Aug;40:41-9. doi: 10.1016/j.anaerobe.2016.05.001.
  • Guinane CM, Crispie F & PD Cotter (2016) Value of microbial genome sequencing for probiotic strain identification and characterisation: promises and pitfalls. Book chapter in The Gut-Brain axis: Dietary, probiotic and prebiotic interventions on the microbiota (Ed. N, Hyland and C. Stanton).
  • Guinane CM, Piper C, Draper LA, O’Connor PM,  Hill C, Ross RP & PD Cotter (2015) Impact of environmental factors on bacteriocin promoter activity in gut-derived Lactobacillus salivarius. Applied & Environmental Microbiology.  81(22):7851-9.
  • Walsh CJ, Guinane CM, Hill C, Ross RP, O'Toole PW & PD Cotter (2015) In silico identification of bacteriocin gene clusters in the gastrointestinal tract, based on the Human Microbiome Project's reference genome database. BMC Microbiology. 16;15:183.
  • O'Connor PM, O'Shea EF, Guinane CM, O'Sullivan O, Cotter PD, Ross RP &  C Hill (2015) Nisin H Is a New Nisin Variant Produced by the Gut-Derived Strain Streptococcus hyointestinalis DPC6484. Applied & Environmental Microbiology. 81(12):3953-60.
  • Guinane CM, Kent RM, Norberg S, O'Connor PM, Cotter PD, Hill C, Fitzgerald GF, Stanton C & RP Ross (2015) Generation of the antimicrobial peptide caseicin A from casein by hydrolysis with thermolysin enzymes. International Dairy Journal 49 (2015) 1-7.
  • Viana, D, Comos  M, McAdam PR, Ward MJ, Selva L, Guinane CM, González-Muñoz BM, Tristan A, Foster SJ, JR Fitzgerald & JR Penades (2015) A single natural 1 mutation alters bacterial pathogen host-tropism. Nature Genetics. 47(4):361-6.
  • Ryan PA, Guinane CM, London LEE, Kelleher P, Fitzgerald GF, Caplice RNM, Ross RP & C Stanton (2015) Genome Sequence of the Heteropolysaccharide-Producing Strain Lactobacillus mucosae DPC 6426. Genome Announcement 3(1). pii: e01350-14.
  • Endersen L, Guinane CM, Johnston C, Neve H, Coffey A, Ross RP, McAuliffe O & J O'Mahony (2015) Genome analysis of Cronobacter phage Ss1 reveals an endolysin with potential for biocontrol of Gram-negative bacterial pathogens. Journal of General Virology.    doi: 10.1099/vir.0.068494-0.
  • Rychli K, Guinane CM, Daly K, Hill C & PD Cotter (2014) Generation of non-polar deletion mutants in Listeria monocytogenes using the “SOEing” method. Methods in Molecular Biology.1157:187-200.
  • Guidone A, Rea M, Ross PR, Stanton C, Guinane CM, Ricciardi A, Zotta T & E Parente (2014) Polymorphisms in stress response genes in Lactobacillus plantarum: implications for classification and heat stress response. Annals in Microbiology. DOI: 10.1007/s13213-014-0862-7.
  • Walsh CJ, Guinane CM, O'Toole PW & PD Cotter (2014) Beneficial modulation of the gut microbiota. FEBS Letters pii: S0014-5793(14)00254-3. Review.
  • Clayton EM, Daly KM, Guinane CM, Hill C, Cotter PD & RP Ross (2014) Atypical Listeria innocua strains possess an intact LIPI-3. BMC Microbiology.14:58. doi: 10.1186/1471-2180-14-58.
  • Cavanagh D, Guinane CM, Neve H, Coffey A, Ross RP, Fitzgerald GF & O McAuliffe (2014) Phages of non-dairy Lactococci: isolation and characterisation of phi47, a phage infecting the grass isolate Lactococcus lactis ssp. cremoris DPC6860. Frontiers in Microbiology. 13;4:417.doi: 0.3389/fmicb.2013.00417
  • Muller A, Rychli K, Muhterem-Uyar M, Zaiser A, Stessl B, Guinane CM, Cotter PD, Wagner M, & S Schmitz-Esser (2013) Tn6188 - A Novel Transposon in Listeria monocytogenes Responsible for Tolerance to Benzalkonium Chloride.  PLoS One. 8(10):e76835.
  • Guinane CM & PD Cotter (2013) Role of the gut microbiota in health and chronic gastrointestinal disease: understanding a hidden metabolic organ. Therapeutic Advances in Gasteroentology. 6(4):295-308.
  • Barrett, E, Guinane CM, Ryan CA, Dempsey EM, Murphy BP, O'Toole PW, Fitzgerald GF, Cotter PD, Ross RP & C Stanton (2013) Microbiota diversity and stability of the preterm neonatal ileum and colon of two infants. MicrobiologyOpen. doi: 10.1002/mbo3.64
  • Guinane CM, Tadrous A, Fouhy F, Ryan CA, Dempsey EM, Murphy B, Andrews E, Cotter PD, Stanton C & RP Ross (2013) Microbial composition of human appendices from patients following appendectomy. MBio. 15;4(1).
  • Lakshminarayanan B, Guinane CM, O'Connor PM, Coakley M, Hill C, Stanton C, O'Toole PW & RP Ross (2013) Isolation and characterization of bacteriocin-producing bacteria from the intestinal microbiota of elderly Irish subjects. Journal of Applied Microbiology. 114(3):886-98.
  • Fouhy F, Guinane CM, Hussey A, Wall R, Ryan A, Dempsey E, Murphy B, Ross RP, Fitzgerald GF, Stanton C & PD Cotter (2012)  High-throughput sequencing reveals the incomplete, short term, recovery of the infant gut microbiota following parenteral antibiotic treatment with ampicillin and gentamycin. Antimicrobial Agents & Chemotherapy. 56(11):5811.
  • Kent RM, Guinane CM, O'Connor PM, Fitzgerald GF, Hill C, Stanton C & RP Ross (2012) Production of the antimicrobial peptides Caseicin A and B by Bacillus isolates growing on sodium caseinate Letters in Applied Microbiology. 55 (2):141-8.
  • Collins B, Guinane CM, Cotter PD, Hill C & RP Ross (2012). Assessing the contributions of the LiaS histidine kinase to the innate resistance of Listeria monocytogenes to nisin, cephalosporins, and disinfectants. Applied & Environmental Microbiology. 78(8):2923-9
  • Alemayehu D, Casey PR, McAuliffe O, Guinane CM, Martin JG, Shanahan F, Coffey A,     Ross RP, & C Hill (2012) Bacteriophages MR299-2 and NH-4 can eliminate Pseudomonas aeruginosa in the Murine Lung and on Cystic Fibrosis Lung Airway Cells. Mbio   6;3(2):e00029-12.
  • Guinane CM, Barrett E, Fitzgerald GF, van Sinderen D, Ross RP & C Stanton (2011)          Genome Announcement: Genome Sequence of Bifidobacterium breve DPC 6330, a strain isolated from the human intestine. Journal of Bacteriology. 193(23):6799-800.
  • Guinane CM, Kent RM, Norberg S, Hill C, Fitzgerald GF, Stanton C & RP Ross (2011) Host specific diversity in Lactobacillus johnsonii as evidenced by a major chromosomal inversion  and phage resistance mechanisms. PLoS One. 6(4):e18740.
  • Wilson GJ, Seo KS, Connelley T, Chuang-Smith ON, Merriman JA, Guinane CM, Cartwright RA, Park JY, Bohach GA, Schlievert PM, Morrison WI & JR Fitzgerald (2011) A Novel Core Genome-Encoded Superantigen Contributes to Lethality of Community-Associated MRSA Necrotizing Pneumonia. PLoS Pathogens 7(10): e1002271.
  • Guinane CM, Penadés JR & JR Fitzgerald (2011) The role of horizontal gene transfer in Staphylococcus aureus host adaptation. Virulence. 2(3):241-3
  • Viana D, Blanco J, Tormo-Más MA, Selva L, Guinane CM, Baselga R, Corpa JM, Lasa I,Novick RP, Fitzgerald JR & JR Penadés (2010) Adaptation of Staphylococcus aureus to ruminant and equine hosts involves SaPI-carried variants of von Willebrand factor-binding protein. Molecular Microbiology. 77:1583-94.
  • Guinane CM, Ben Zakour NL, Tormo-Mas MA, Weinert LA, Lowder BV,  Cartwright RA, Smyth DS, Smyth CJ, Lindsay J, Gould KA, Witney A,  Hinds J, Bollback J, Rambaut A, Penadés J & JR Fitzgerald (2010) Evolutionary genomics of Staphylococcus aureus reveals insights into the origin and molecular basis of ruminant host adaptation. Genome  Biology and  Evolution. 2:454-66.  Recommended on Faculty 1000 Sept 2010
  • Lowder BV, Guinane CM, Ben Zakour NL, Weinert LA, Conway-Morris A, Cartwright RA,Simpson AJ, Rambaut A, Nübel U & JR Fitzgerald (2009)  Recent Human-to-poultry host jump, adaptation and pandemic spread of Staphylococcus aureus. Proceedings in the National Academy of Sciences (PNAS) 106:19545-50.  Exceptional on Faculty 1000 Nov 2009.
  • Guinane CM, Sturdevant DE, Herron-Olson L, Smyth DS, Villaruz AE, Kapur V, Hartigan PJ, Smyth CJ, & JR Fitzgerald (2008) Pathogenomic analysis of the common bovine Staphylococcus aureus clone (ET3): emergence of a virulent subtype with potential risk to public health.  Journal of Infectious Diseases. 197(2):205-13.
  • *Ben Zakour NL, *Guinane CM & JR Fitzgerald (2008) Pathogenomics of the staphylococci: niche adaptation and the emergence of new virulent strains. *Equal contribution by both authors.  FEMS Microbiology Letters. 289(1):1-12.
  • Ben Zakour NL, Sturdevant DE, Even S, Guinane CM, Barbey C, Alves PD, Cochet MF, Gautier M, Otto M, Fitzgerald JR & Y Le Loir (2008) Genome-scale analysis of      Staphylococcus aureus reveals host-specific diversification of the core genome. Journal of Bacteriology. 190(19):6302-17.
  • Guinane CM & JR Fitzgerald (2007) Microarray comparative genomic hybridization for the analysis of bacterial population genetics and evolution. Methods in Molecular Biology. 431:47-54.
  • Guinane CM, Cotter PD, Lawton EM, Ross RP & C Hill (2007) Insertional mutagenesis to generate lantibiotic resistance in Lactococcus lactis. Applied & Environmental Microbiology. 73(14):4677-80.
  • Guinane CM, Cotter PD, Hill C & RP Ross (2006) Contribution of penicillin-binding protein homologs to antibiotic resistance, cell morphology, and virulence of Listeria monocytogenes EGDe. Antimicrobial Agents & Chemotherapy. 50(8):2824-8.
  • Guinane CM, Cotter PD, Hill C & RP Ross (2006) Spontaneous resistance in Lactococcus lactis IL1403 to the lantibiotic lacticin 3147.  FEMS Microbiology Letters. 260 (1):77-83.
  • Guinane CM, Cotter PD, Ross RP & C Hill (2005) Microbial solutions to microbial problems; the use of lactococcal bacteriocins in the control of undesirable biota in foods. Journal of Applied Microbiology. 98(6):1316-25.
  • Cotter PD, Guinane CM & C Hill (2002) The LisRK systems determines sensitivity to nisin and to cephalosporins. Antimicrobial Agents & Chemotherapy. 46(9):2784-90.