Kimberly N Cowles, Arjun S Iyer, Iain McConnell, Ellie G Guillemette, Dharshita Nellore, Sonia C Zaacks, Jeri D Barak. 2025. Established Pseudomonas syringae pv. tomato infection disrupts immigration of leaf surface bacteria to the apoplast. Front. Microbiol. Link

Megan H. Dixon, Dharshita Nellore, Sonia C. Zaacks, Jeri D. Barak. 2024. Time of arrival during disease progression and humidity additively influence Salmonella enterica colonization of lettuce. Appl. Environ. Microbiol. Link.

Megan H. Dixon, Victoria L. Harrod, Russell Groves, Ellie Guillemette, Jeri Barak. 2023. The “friends” that help dangerous bacteria get into your salad. Front Young Minds. Link

Adam F. Bigott, Samuel F. Hutton, Gary Vallad, Richard Lankau, Jeri D. Barak. 2023. Narrow, but not broad, spectrum resistance and disease reshape phyllosphere bacterial communities. bioRxiv. Link.

Megan H. Dixon, Kimberly N. Cowles, Sonia C. Zaacks, Isabel N. Marciniak, Jeri D. Barak. 2022. Xanthomonas infection transforms the apoplast into an accessible and habitable niche for Salmonella enterica. Appl. Environ. Microbiol. Link.

Victoria L. Harrod, Russell Groves, Ellie Guillemette, Jeri Barak. 2022. Give and Take: Salmonella enterica alters Macrosteles auadrilineatus feeding behaviors resulting in altered S. enterica populations and distribution on leaves. Sci Rep 12, 8544 Link.

Kimberly N. Cowles, Anna K. Block, Jeri D. Barak. 2022. Xanthomonas hortorum pv. gardneri TAL effector AvrHah1 is necessary and sufficient for increased persistence of Salmonella enterica on tomato leaves. Sci Rep 12, 7313. Link

Harrod, V.L., Groves, R.L., Maurice, M.A., and Barak J.D. 2021. Frankliniella occidentalis facilitate Salmonella enterica survival in the phyllosphere. PLoS ONE 16(2): e0247325. Link.

Nicola Holden, László Kredics, Jeri Barak. 2020. Editorial for the thematic issue, “Human Pathogens in the Environment.” FEMS Microbiol Letters Link

Cowles, K.N, Groves, R.L., and Barak, J.D. 2018. Leafhopper-induced activation of the jasmonic acid response benefits Salmonella enterica in a flagellum-dependent manner. Front. Microbiol. doi: 10.3389/fmicb.2018.01987 Link

Grace Kwan, Brett Plagenz, Kimberly Cowles, Tippapha Pisithkul, Daniel Amador-Noguez, and Jeri D. Barak. 2018. Few Differences in metabolic network use found between Salmonella enterica colonization of plants and typhoidal mice. Front. Microbiol. doi: 10.3389/fmicb.2018.00695 Link

Dundore-Arias JP and Barak JD. 2017. “Plant Associated Foodborne Pathogens.” In: A.P. Keinath, W.M. Wintermantel, and T.A. Zitter (Eds.), Compendium of Cucurbit Diseases and Pests (pp. 17-19). APS Press, St. Paul.

Jeri D. Barak, Taca Vancheva, Pierre Lefeuvre, Jeffrey B. Jones, Sujan Timilsina, Gerald V. Minisavage, Gary E. Vallad, and Ralf Koebnik. 2016. Whole-genome sequences of Xanthomonas euvesicatoria strains clarify taxonomy and reveal a stepwise erosion of type 3 effectors. Front. Plant  Sci.doi: 10.3389/fpls.2016.01805 Link

Cowles KN, Willis DK, Engel TN, Jones JB, and Barak J.D. 2016. Diguanylate cyclases, AdrA and STM1987, regulate Salmonella enterica exopolysaccharide production during plant colonization in an environment-dependent manner. Appl Environ Microbiol. 82(4): 1237-1248. Link

Dundore-Arias JP and Barak JD.2015. “Food Safety.” In: K.V. Subbarao, R.M. Davis, R.L. Gilbertson, and R.N. Raid (Eds.), Compendium of Lettuce Diseases and Pests (pp. 22-24). APS Press, St. Paul.

Potnis, N., Colee, J., Jones, J.B., and Barak, J.D. 2015. Plant pathogen induced watersoaking promotes Salmonella enterica growth on tomato leaves. Appl. Environ. Microbiol. 81(23): 8126-34. Link

Dundore-Arias, J.P., Groves, R.L. and Barak, J.D. 2015. Influence of prgH on the persistence of ingested Salmonella enterica in the leafhopper Macrosteles quadrilineatus. Appl. Environ. Microbiol. 81 (18): 6345-6354. Link

Schwartz AR, Potnis N, Timilsina S, Wilson M, Patané J, Martins J Jr., Minsavage GV, Dahlbeck D, Akhunova A, Almeida N, Vallad GE, Barak JD, White FF, Miller SA, Ritchie D, Goss E, Bart RS, Setubal JC, Jones JB and Staskawicz BJ 2015. Phylogenomics of Xanthomonas field strains infecting pepper and tomato reveals diversity in effector repertoires and identifies determinants of host specificity. Front. Microbiol. 6:535. Link

Potnis, N., Timilsina, S., Strayer, A., Shantharaj, D., Barak, J.D., Paret, M.L., Vallad, G.E., and Jones, J.B. 2015. Bacterial spot of tomato and pepper: diverse Xanthomonas species with a wide variety of virulence factors posing a worldwide challenge. Mol. Plant Pathol. Link

Kwan, G., Pisithkul, T., Amador-Noguez, D., and Barak, J.D. 2015. De novo amino acid biosynthesis contributes to Salmonella enterica growth in alfalfa seedling exudates.  Appl. Environ. Microbiol. 81(3): 861-73  Link

Soto-Arias, J.P., Groves, R.L., and Barak, J.D. 2014. Transmission and retention of Salmonella enterica by phytophagous hemipteran insects.  Appl. Environ. Microbiol. 80(17): 5447-5456. Link

Potnis, N., Soto-Arias, J.P., Cowles, K., van Bruggen, A.H.C., Jones, J.B., and Barak, J.D. 2014. Xanthomonas perforans colonization influences Salmonella enterica in the tomato phyllosphere. Appl. Environ. Microbiol. 80(10): 3173-3180. Link

Pollard, S., Barak, J.D., Royer, R., Grabau, E., Reiter, M., Gu, G., and Rideout, S. 2014. Potential interactions between Salmonella enterica and Ralstonia solanacearum in tomato plants. J. Food Prot 77(2): 320-324. Link

Soto-Arias, J.P., Groves, R.L., and Barak, J.D. 2013. Benefits of piercing and sucking, enhanced persistence of Salmonella enterica on plants due to phytophagous hemipterans. PLoS ONE 8(10): e79404. Link

Kwan, G., Charkowski, A.O., and Barak, J.D. 2013. Salmonella enterica moderates Pectobacterium carotovorum populations and virulence on lettuce. mBio. 4:e00557-12. Link

Jeri D. Barak and Brenda Schroeder. 2012. Interrelationships of Food Safety and Plant Pathology: The Life Cycle of Human Pathogens. Ann Rev Phytopathol 50: 241-266. Link

Hao, L., H. Andrews-Polymenis, M. McClelland, D. K. Willis, J. D. Barak. 2012. Salmonella enterica requires siderophore biosynthesis to colonize plants. Appl. Environ. Microbiol. 13:4561-4570. Link

Barak, J. D. 2012. The biggest food safety threat from the tiniest of crops. Cereal Foods World. 57(3): 123-124. Link

Courtney E. Jahn, Dija A. Selimi, Jeri D. Barak, and Amy O. Charkowski. 2011. The Dickeya dadantii biofilm matrix consists of cellulose nanofibers and is an emergent property dependent upon the type III secretion system and the cellulose synthesis operon. Microbiol. 157: 2733-2744. Link

Jeri D. Barak, Kramer, L., and Hao, L. 2011. Plant cultivar alters Salmonella enterica colonization of tomato and Type 1 trichomes are preferential colonization sites. Appl. Environ. Microbiol. 77(2): 498-504. Link

Jeri D. Barak, L. Gorski, Anita S. Liang, and Kohn-Eun Narm. 2009. Previously uncharacterized Salmonella enterica genes required for swarming play a role in plant colonization. Microbiol. 155: 3701-3709. Link

Teplitski, M., Barak, J., and Schneider, K. R. 2009. Human enteric pathogens in produce: un-answered ecological questions with direct implications for food safety. Curr. Opin. Biotech. 20(2): 166-71. Link

Csordas, A.T., M.J. Delwiche and J.D. Barak. 2008. Nucleic acid sensor and fluid handling for detection of bacterial pathogens. Sensors and Actuators B: Chemical. 134: 1-8. Link

Csordas, A.T., M.J. Delwiche and J.D. Barak. 2008. Automatic detection of Salmonella enterica in sprout irrigation water using a nucleic acid sensor. Sensors and Actuators B: Chemical. 134: 9-17. Link

Barak, J.D., A. S. Liang and K. Narm. 2008. Differential attachment and subsequent contamination of agricultural crops by Salmonella enterica. Appl. Environ. Microbiol. 74(17): 5568-5570. Link

Jeri D. Barak and Anita S. Liang. 2008. Role of soil, crop debris, and a plant pathogen in Salmonella enterica contamination of tomato plants. PLoS ONE 3(2): e1657. Link

Lermo, A., E. Zacco, J. Barak, M. Delwiche, S. Campoy, J. Barbe, S. Alegret and M.I. Pividor. 2008. Towards q-PCR of pathogenic bacteria with improved electrochemical double-tagged genosensing detection. Biosensors Bioelectronics. 23(12):1805-1811. Link

Mohle-Boetani, J., J. Farrar, P. Bradley, J. Barak, M. Miller, R. Mandrel, P. Mead, W. Keen, K. Cummings, S. Abbott and S. Benson Werner. 2008. Salmonella infections associated with mung bean sprouts: epidemiology and environmental investigations. Epidemiol. Inf. doi: 10.1017/S0950268808000411. Link

Barak, J.D., C.E. Jahn, D.L. Gibson and A.O. Charkowski. 2007. The role of cellulose, lipopolysaccharide O-polysaccharide, and O-antigen capsule in the colonization of plants by Salmonella enterica. Mol. Plant-Microbe Interact. 20:1083-1091. *Faculty of 1,000 recommended. Link

Barak, J., L. Gorski, P. Naraghi-Arani and A.O. Charkowski. 2005. Salmonella enterica virulence genes are required for bacterial attachment to plant tissue. Appl. Environ. Microbiol. 71:5685-5691. Link

Yap, M.-N, C.-H. Yang, J.D. Barak, C.E. Jahn and A.O. Charkowski. 2005. The Erwinia chrysanthemi type III secretion system is required for multicellular behavior. J. Bacteriol. 187:639-648. Link

Barak, J.D., K. Sananikone and M.J. Delwiche. 2005. Comparison of primers for detection of pathogenic E. coli using real-time PCR. Lett. Appl. Microbiol. 41:112-118. Link

Yap, M. N., Barak, J. D., and Charkowski, A. O. 2004. Genomic diversity of Erwinia carotovora subsp. carotovora and its correlation with virulence. Appl. Environ. Microbiol. 70: 3013-3023. Link

Csordas, A. T., Barak, J. D., and Delwiche, M. J. 2004. Comparison of primers for the detection of Salmonella enterica serovars using real-time PCR. Lett. Appl. Microbiol. 39: 187-193. Link

Barak, J. D., Chue, B., and Mills, D. 2003. Recovery of surface bacteria from and surface sanitization of cantaloupes. J. Food Prot. 66: 1805-1810. Link

Barak, J. D. and Gilbertson, R. L. 2003. Genetic diversity of Xanthomonas campestris pv. vitians, the causal agent of bacterial leafspot of lettuce. Phytopathology 93: 596-603. Link

Barak, J. D., Whitehand, L. C., and Charkowski, A. O. 2002. Differences in attachment of Salmonella enterica serovars and Escherichia coli O157:H7 to alfalfa sprouts. Appl. Environ. Microbiol. 68: 4758-4763. Link

Charkowski, A. O., Barak, J. D., Sarreal, C. Z., and Mandrell, R. E. 2002. Growth and colonization of Salmonella enterica and Escherichia coli O157:H7 on alfalfa sprouts and the effects of sprouting temperature, inoculum dose, and frequency of irrigation on bacterial levels. Appl. Environ. Microbiol. 68: 3114-3120. Link

Barak, J. D., Koike, S. T, and Gilbertson, R. L. 2002. Long-distance movement of Xanthomonas campestris pv. vitians in the stems of lettuce plants. Plant Pathology 51: 506-512. Link

Barak, J. D., Koike, S. T, and Gilbertson, R. L. 2001. Role of crop debris and weeds in the epidemiology of bacterial leaf spot of lettuce, caused by Xanthomonas campestris pv. vitians, in California. Plant Disease 85: 169-178. Link

Koike, S. T. *, Barak, J. D. *, Henderson, D. M., and Gilbertson, R. L. 1999. Bacterial blight of leek: a new disease in California caused by Pseudomonas syringae. Plant Disease 83: 165-170. *co-first authors. Link

Tomasky, G; Barak, J; Valiela, I; Behr, P; Soucy, L; Foreman, K. 1999. Nutrient limitation of phytoplankton growth in Waquoit Bay, Massachusetts, USA: a nutrient enrichment study. Aquat. Ecol. 33(2):147-155. Link