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A Systematic Approach to Identify and Characterize the Effectiveness and Safety of Novel Probiotic Strains to Control Foodborne Pathogens.

Ayala DI, Cook PW, Franco JG, Bugarel M, Kottapalli KR, Loneragan GH, Brashears MM, Nightingale KK.

Front Microbiol. 2019 May 17;10:1108. doi: 10.3389/fmicb.2019.01108. eCollection 2019.


Complete Genome Sequences of Four Salmonella enterica Strains (Including Those of Serotypes Montevideo, Mbandaka, and Lubbock) Isolated from Peripheral Lymph Nodes of Healthy Cattle.

Bugarel M, Cook PW, den Bakker HC, Harhay D, Nightingale KK, Loneragan GH.

Microbiol Resour Announc. 2019 Jan 10;8(2). pii: e01450-18. doi: 10.1128/MRA.01450-18. eCollection 2019 Jan.


Molecular detection and quantification of viable probiotic strains in animal feedstuffs using the commercial direct fed microbial Lactobacillus animalis NP51 as a model.

Ayala DI, Chen JC, Bugarel M, Loneragan GH, den Bakker HC, Kottapalli KR, Brashears MM, Nightingale KK.

J Microbiol Methods. 2018 Jun;149:36-43. doi: 10.1016/j.mimet.2018.04.012. Epub 2018 Apr 17.


Draft Genome Sequence of Enterococcus faecium Strain J19, Isolated from Cabbage.

Ayala DI, Cook PW, Campos DL, Franco JG, Brashears MM, den Bakker H, Nightingale KK.

Genome Announc. 2018 Apr 5;6(14). pii: e00213-18. doi: 10.1128/genomeA.00213-18.


Molecular ecology of Listeria spp., Salmonella, Escherichia coli O157:H7 and non-O157 Shiga toxin-producing E. coli in pristine natural environments in Northern Colorado.

Ahlstrom CA, Manuel CS, Den Bakker HC, Wiedmann M, Nightingale KK.

J Appl Microbiol. 2018 Feb;124(2):511-521. doi: 10.1111/jam.13657.


Salmonella in Peripheral Lymph Nodes of Healthy Cattle at Slaughter.

Webb HE, Brichta-Harhay DM, Brashears MM, Nightingale KK, Arthur TM, Bosilevac JM, Kalchayanand N, Schmidt JW, Wang R, Granier SA, Brown TR, Edrington TS, Shackelford SD, Wheeler TL, Loneragan GH.

Front Microbiol. 2017 Nov 9;8:2214. doi: 10.3389/fmicb.2017.02214. eCollection 2017.


Draft Genome Sequence of Lactobacillus salivarius L28 Isolated from Ground Beef.

Ayala DI, Cook PW, Campos DL, Brashears MM, den Bakker H, Nightingale KK.

Genome Announc. 2017 Sep 28;5(39). pii: e00955-17. doi: 10.1128/genomeA.00955-17.


Applications and safety considerations of Lactobacillus salivarius as a probiotic in animal and human health.

Chaves BD, Brashears MM, Nightingale KK.

J Appl Microbiol. 2017 Jul;123(1):18-28. doi: 10.1111/jam.13438. Epub 2017 May 3. Review.


Listeria monocytogenes Isolates Carrying Virulence-Attenuating Mutations in Internalin A Are Commonly Isolated from Ready-to-Eat Food Processing Plant and Retail Environments.

VAN Stelten A, Roberts AR, Manuel CS, Nightingale KK.

J Food Prot. 2016 Oct;79(10):1733-1740. doi: 10.4315/0362-028X.JFP-16-145.


Molecular detection assay of five Salmonella serotypes of public interest: Typhimurium, Enteritidis, Newport, Heidelberg, and Hadar.

Bugarel M, Tudor A, Loneragan GH, Nightingale KK.

J Microbiol Methods. 2017 Mar;134:14-20. doi: 10.1016/j.mimet.2016.12.011. Epub 2016 Dec 18.


Carbapenem-Resistant Bacteria Recovered from Faeces of Dairy Cattle in the High Plains Region of the USA.

Webb HE, Bugarel M, den Bakker HC, Nightingale KK, Granier SA, Scott HM, Loneragan GH.

PLoS One. 2016 Jan 29;11(1):e0147363. doi: 10.1371/journal.pone.0147363. eCollection 2016.


Dissemination of the mcr-1 colistin resistance gene.

Webb HE, Granier SA, Marault M, Millemann Y, den Bakker HC, Nightingale KK, Bugarel M, Ison SA, Scott HM, Loneragan GH.

Lancet Infect Dis. 2016 Feb;16(2):144-5. doi: 10.1016/S1473-3099(15)00538-1. Epub 2015 Dec 18. No abstract available.


Targeted Amplicon Sequencing for Single-Nucleotide-Polymorphism Genotyping of Attaching and Effacing Escherichia coli O26:H11 Cattle Strains via a High-Throughput Library Preparation Technique.

Ison SA, Delannoy S, Bugarel M, Nagaraja TG, Renter DG, den Bakker HC, Nightingale KK, Fach P, Loneragan GH.

Appl Environ Microbiol. 2015 Nov 13;82(2):640-9. doi: 10.1128/AEM.03182-15. Print 2016 Jan 15.


Prevalence and distribution of Listeria monocytogenes inlA alleles prone to phase variation and inlA alleles with premature stop codon mutations among human, food, animal, and environmental isolates.

Manuel CS, Van Stelten A, Wiedmann M, Nightingale KK, Orsi RH.

Appl Environ Microbiol. 2015 Dec;81(24):8339-45. doi: 10.1128/AEM.02752-15. Epub 2015 Sep 25.


Two Draft Genome Sequences of a New Serovar of Salmonella enterica, Serovar Lubbock.

Bugarel M, den Bakker HC, Nightingale KK, Brichta-Harhay DM, Edrington TS, Loneragan GH.

Genome Announc. 2015 Apr 16;3(2). pii: e00215-15. doi: 10.1128/genomeA.00215-15.


Genetic Diversity and Pathogenic Potential of Attaching and Effacing Escherichia coli O26:H11 Strains Recovered from Bovine Feces in the United States.

Ison SA, Delannoy S, Bugarel M, Nightingale KK, Webb HE, Renter DG, Nagaraja TG, Loneragan GH, Fach P.

Appl Environ Microbiol. 2015 Jun;81(11):3671-8. doi: 10.1128/AEM.00397-15. Epub 2015 Mar 20.


Geographical and meteorological factors associated with isolation of Listeria species in New York State produce production and natural environments.

Chapin TK, Nightingale KK, Worobo RW, Wiedmann M, Strawn LK.

J Food Prot. 2014 Nov;77(11):1919-28. doi: 10.4315/0362-028X.JFP-14-132.


Listeria floridensis sp. nov., Listeria aquatica sp. nov., Listeria cornellensis sp. nov., Listeria riparia sp. nov. and Listeria grandensis sp. nov., from agricultural and natural environments.

den Bakker HC, Warchocki S, Wright EM, Allred AF, Ahlstrom C, Manuel CS, Stasiewicz MJ, Burrell A, Roof S, Strawn LK, Fortes E, Nightingale KK, Kephart D, Wiedmann M.

Int J Syst Evol Microbiol. 2014 Jun;64(Pt 6):1882-9. doi: 10.1099/ijs.0.052720-0. Epub 2014 Mar 5.


Substantial within-animal diversity of Salmonella isolates from lymph nodes, feces, and hides of cattle at slaughter.

Gragg SE, Loneragan GH, Nightingale KK, Brichta-Harhay DM, Ruiz H, Elder JR, Garcia LG, Miller MF, Echeverry A, Ramírez Porras RG, Brashears MM.

Appl Environ Microbiol. 2013 Aug;79(15):4744-50. doi: 10.1128/AEM.01020-13. Epub 2013 Jun 21.


Genome sequencing identifies Listeria fleischmannii subsp. coloradonensis subsp. nov., isolated from a ranch.

den Bakker HC, Manuel CS, Fortes ED, Wiedmann M, Nightingale KK.

Int J Syst Evol Microbiol. 2013 Sep;63(Pt 9):3257-68. doi: 10.1099/ijs.0.048587-0. Epub 2013 Mar 22.


Landscape and meteorological factors affecting prevalence of three food-borne pathogens in fruit and vegetable farms.

Strawn LK, Fortes ED, Bihn EA, Nightingale KK, Gröhn YT, Worobo RW, Wiedmann M, Bergholz PW.

Appl Environ Microbiol. 2013 Jan;79(2):588-600. doi: 10.1128/AEM.02491-12. Epub 2012 Nov 9.


Efficacy of chemical interventions against Escherichia coli O157:H7 and multidrug-resistant and antibiotic-susceptible Salmonella on inoculated beef trimmings.

Geornaras I, Yang H, Moschonas G, Nunnelly MC, Belk KE, Nightingale KK, Woerner DR, Smith GC, Sofos JN.

J Food Prot. 2012 Nov;75(11):1960-7. doi: 10.4315/0362-028X.JFP-12-195.


Sensitivity of Shiga toxin-producing Escherichia coli, multidrug-resistant Salmonella, and antibiotic-susceptible Salmonella to lactic acid on inoculated beef trimmings.

Fouladkhah A, Geornaras I, Yang H, Belk KE, Nightingale KK, Woerner DR, Smith GC, Sofos JN.

J Food Prot. 2012 Oct;75(10):1751-8. doi: 10.4315/0362-028X.JFP-12-128.


Evaluation of lactic acid as an initial and secondary subprimal intervention for Escherichia coli O157:H7, non-O157 Shiga toxin-producing E. coli, and a nonpathogenic E. coli surrogate for E. coli O157:H7.

Pittman CI, Geornaras I, Woerner DR, Nightingale KK, Sofos JN, Goodridge L, Belk KE.

J Food Prot. 2012 Sep;75(9):1701-8. doi: 10.4315/0362-028X.JFP-11-520.


Comparison of decontamination efficacy of antimicrobial treatments for beef trimmings against Escherichia coli O157:H7 and 6 non-O157 Shiga toxin-producing E. coli serogroups.

Geornaras I, Yang H, Manios S, Andritsos N, Belk KE, Nightingale KK, Woerner DR, Smith GC, Sofos JN.

J Food Sci. 2012 Sep;77(9):M539-44. doi: 10.1111/j.1750-3841.2012.02878.x. Epub 2012 Aug 16.


High-throughput small molecule screening reveals structurally diverse compounds that inhibit the growth of Escherichia coli O157:H7 in vitro.

Chen JC, Carlson BA, Sofos JN, Smith GC, Belk KE, Nightingale KK.

J Food Prot. 2011 Dec;74(12):2148-56. doi: 10.4315/0362-028X.JFP-11-010.


Recombination and positive selection contributed to the evolution of Listeria monocytogenes lineages III and IV, two distinct and well supported uncommon L. monocytogenes lineages.

Tsai YH, Maron SB, McGann P, Nightingale KK, Wiedmann M, Orsi RH.

Infect Genet Evol. 2011 Dec;11(8):1881-90. doi: 10.1016/j.meegid.2011.08.001. Epub 2011 Aug 11.


Significant shift in median guinea pig infectious dose shown by an outbreak-associated Listeria monocytogenes epidemic clone strain and a strain carrying a premature stop codon mutation in inlA.

Van Stelten A, Simpson JM, Chen Y, Scott VN, Whiting RC, Ross WH, Nightingale KK.

Appl Environ Microbiol. 2011 Apr;77(7):2479-87. doi: 10.1128/AEM.02626-10. Epub 2011 Feb 4.


Variation in Listeria monocytogenes dose responses in relation to subtypes encoding a full-length or truncated internalin A.

Chen Y, Ross WH, Whiting RC, Van Stelten A, Nightingale KK, Wiedmann M, Scott VN.

Appl Environ Microbiol. 2011 Feb;77(4):1171-80. doi: 10.1128/AEM.01564-10. Epub 2010 Dec 17.


Presence of antibiotic-resistant commensal bacteria in samples from agricultural, city, and national park environments evaluated by standard culture and real-time PCR methods.

Yang H, Byelashov OA, Geornaras I, Goodridge LD, Nightingale KK, Belk KE, Smith GC, Sofos JN.

Can J Microbiol. 2010 Sep;56(9):761-70. doi: 10.1139/w10-060.


Characterization and transferability of class 1 integrons in commensal bacteria isolated from farm and nonfarm environments.

Yang H, Byelashov OA, Geornaras I, Goodridge LD, Nightingale KK, Belk KE, Smith GC, Sofos JN.

Foodborne Pathog Dis. 2010 Dec;7(12):1441-51. doi: 10.1089/fpd.2010.0555. Epub 2010 Aug 12.


Escherichia coli O157:H7 strains that persist in feedlot cattle are genetically related and demonstrate an enhanced ability to adhere to intestinal epithelial cells.

Carlson BA, Nightingale KK, Mason GL, Ruby JR, Choat WT, Loneragan GH, Smith GC, Sofos JN, Belk KE.

Appl Environ Microbiol. 2009 Sep;75(18):5927-37. doi: 10.1128/AEM.00972-09. Epub 2009 Jul 17.


Some Listeria monocytogenes outbreak strains demonstrate significantly reduced invasion, inlA transcript levels, and swarming motility in vitro.

Roberts AJ, Williams SK, Wiedmann M, Nightingale KK.

Appl Environ Microbiol. 2009 Sep;75(17):5647-58. doi: 10.1128/AEM.00367-09. Epub 2009 Jul 6.


Lineage specific recombination rates and microevolution in Listeria monocytogenes.

den Bakker HC, Didelot X, Fortes ED, Nightingale KK, Wiedmann M.

BMC Evol Biol. 2008 Oct 8;8:277. doi: 10.1186/1471-2148-8-277.


inlA premature stop codons are common among Listeria monocytogenes isolates from foods and yield virulence-attenuated strains that confer protection against fully virulent strains.

Nightingale KK, Ivy RA, Ho AJ, Fortes ED, Njaa BL, Peters RM, Wiedmann M.

Appl Environ Microbiol. 2008 Nov;74(21):6570-83. doi: 10.1128/AEM.00997-08. Epub 2008 Sep 12.


Lineage specific recombination and positive selection in coding and intragenic regions contributed to evolution of the main Listeria monocytogenes virulence gene cluster.

Orsi RH, Maron SB, Nightingale KK, Jerome M, Tabor H, Wiedmann M.

Infect Genet Evol. 2008 Sep;8(5):566-76. doi: 10.1016/j.meegid.2008.04.006. Epub 2008 Apr 20.


Central nervous system tissue in meat products: an evaluation of risk, prevention strategies, and testing procedures.

Bowling MB, Belk KE, Nightingale KK, Goodridge LD, Scanga JA, Sofos JN, Tatum JD, Smith GC.

Adv Food Nutr Res. 2007;53:39-64. Review.


Recombination and positive selection contribute to evolution of Listeria monocytogenes inlA.

Orsi RH, Ripoll DR, Yeung M, Nightingale KK, Wiedmann M.

Microbiology. 2007 Aug;153(Pt 8):2666-78.


Distribution of internalin gene profiles of Listeria monocytogenes isolates from different sources associated with phylogenetic lineages.

Jia Y, Nightingale KK, Boor KJ, Ho A, Wiedmann M, McGann P.

Foodborne Pathog Dis. 2007 Summer;4(2):222-32.


Validation of a traditional Italian-style salami manufacturing process for control of Salmonella and Listeria monocytogenes.

Nightingale KK, Thippareddi H, Phebus RK, Marsden JL, Nutsch AL.

J Food Prot. 2006 Apr;69(4):794-800.


Associations among Listeria monocytogenes genotypes and distinct clinical manifestations of listeriosis in cattle.

Pohl MA, Wiedmann M, Nightingale KK.

Am J Vet Res. 2006 Apr;67(4):616-26.


Listeria monocytogenes internalins are highly diverse and evolved by recombination and positive selection.

Tsai YH, Orsi RH, Nightingale KK, Wiedmann M.

Infect Genet Evol. 2006 Sep;6(5):378-89. Epub 2006 Feb 10.


Molecular characterization of Listeria monocytogenes from natural and urban environments.

Sauders BD, Durak MZ, Fortes E, Windham K, Schukken Y, Lembo AJ Jr, Akey B, Nightingale KK, Wiedmann M.

J Food Prot. 2006 Jan;69(1):93-105.


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