1109 Experiment St. - Melton Building - Griffin, GA 30223 USA - PH (770) 228-7284 - FAX (770) 229-3216
RESEARCH PROGRAMS
 Produce Research

2007 projects (pdf file containing summaries)

Surface-sterilization Methods for Escherichia coli O157:H7 on Lettuce (Lactuca sativa L.)  (G. Zhang, L. Ma, L.R. Beuchat, M.C. Erickson, V.H. Phelan, and M.P. Doyle)

Enumeration of E. coli O157:H7 in Spinach Outbreak Samples
(L. Ma, G. Zhang, P. Garner-Schmidt, and M. P. Doyle)

Isolation and Enumeration of E. coli O157:H7 from Possible Contaminated Ground Beef Samples
(L. Ma, G. Zhang, P. Gerner-Smidt, and M. P. Doyle)

Attachment and Recovery of Escherichia coli O157:H7 and a Non-Pathogenic Surrogate
from Romaine Lettuce after Contact with Contaminated Ice
(J. Kim and M. Harrison)

Contamination and Potential Internalization of Escherichia coli O157:H7 in Pre-harvest Iceberg Lettuce (Lactuca sativa L.)
(G. Zhang, L. Ma, L.R. Beuchat, M.C. Erickson, V.H. Phelan, and M.P. Doyle)

Contamination and Potential Internalization of Escherichia coli O157:H7 in Lettuce (Lactuca sativa L.) by Soil Inoculation
(G. Zhang, L. Ma, L.R. Beuchat, M.C. Erickson, V.H. Phelan, and M.P. Doyle)

Pre-harvest Factors Affecting Internalization of Zoonotic Pathogens into Lettuce
(M.C. Erickson, J. Liao, A. Payton, C. Webb, L. Ma, G. Zhang, M. Doyle, and L.R. Beuchat)

Survival, Growth, and Toxigenesis of Clostridium botulinum in Fresh Carrot Juice
(L. Ma, G. Zhang, P. Gerner-Smidt, and M. P. Doyle)

Survival and Growth of Acid-adapted and Unadapted Salmonella in and on Raw Tomatoes as Affected by Stage of Ripeness and Storage Temperature
(L. R. Beuchat and D. A. Mann)

Efficacy of Gaseous Chlorine Dioxide as a Sanitizer Against Cryptosporidium parvum, Cyclospora cayetanensis, and Encephalitozoon intestinalis on Produce
(Y.R. Ortega, A. Mann, M.P. Torres, and V. Cama)

2006 projects (pdf file containing summaries)

Comparison of Treatment of Fresh-cut Lettuce and Diced Tomatoes with Sodium Hypochlorite and Calcium Hypochlorite for Effects on Microbiological and Sensory Qualities
(J. L. Simmons J.-H. Ryu, and L. R. Beuchat)

Detection of Cyclospora in Vegetables and Potential Contamination Sources in Endemic Areas
(Y.R. Ortega, A. Robertson, V.A. Cama, A. Mann, L. Cabrera, C. Taquiri, L. Xiao, and R.H. Gilman)

Infections Associated with Cantaloupe Consumption:  A Public Health Concern
(A. Bowen, A. Fry, G. M. Richards and L. R. Beuchat)

Cryotolerance, Attachment, and Recoverability of Escherichia coli O157:H7 and Selected Surrogates from Romaine Lettuce Leaf Surfaces
(M.A. Harrison)

2005 projects (pdf file containing summaries)

Survival and Growth of Enterobacter sakazakii on Fresh-cut Fruits and Vegetables and in Unpasteurized Juice as Affected by Storage Temperature
(H. Kim and L. R. Beuchat)

Survival and Growth of Enterobacter sakazakii in Infant Rice Cereal Reconstituted with Water, Milk, Liquid Infant Formula or Apple Juice
(G. M. Richards, J. B. Gurtler, and L. R. Beuchat)

Attachment of Salmonella Poona to Cantaloupe Rind and Stem Scar Tissues as Affected by Temperature of Fruit and Inoculum
(G. M. Richards and L.R. Beuchat)

Evaluation of Chlorine Dioxide and a Peroxyacetic Acid-based Sanitizer for Effectiveness in Killing Bacillus cereus and Bacillus thuringiensis Spores in Suspensions, on the Surface of Stainless Steel, and on Apples
(A. C. Kreske, J.-H. Ryu, and L. R. Beuchat)

Survival and Growth of Enterobacter sakazakii on Fresh Produce as Affected by Temperature  and Effectiveness of Sanitizers for its Elimination
(H. Kim and L. R. Beuchat)

Evaluation of Gaseous Chlorine Dioxide as a Sanitizer for Killing Salmonella, Escherichia coli O157:H7, Listeria monocytogenes, and Yeasts and Molds on Fresh and Fresh-cut Produce 
(K. V. Sy, M. B. Murray, M. D. Harrison, and L. R. Beuchat)

Thermal Tolerance of Acid-adapted and Unadapted Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes in Cantaloupe Juice and  Watermelon Juice
(M. Sharma, B. B. Adler, M. D. Harrison, and L. R. Beuchat)

2004 projects (pdf file containing summaries)

Survey of Biosecurity Practices in Produce Operations in the Southeast 
(M. A. Harrison, K. Simmons, W. C. Hurst, and J. A. Harrison)

Survey of Yeasts for Antagonistic Activity Against Salmonella Poona in Cantaloupe Juice and Wounds in Rinds Co-infected with Phytopathogenic Molds 
(G. M. Richards, J. W. Buck, and L. R. Beuchat)

Efficacy of Gaseous Chlorine Dioxide as a Sanitizer for Killing Salmonella, Yeasts, and Molds on Blueberries, Strawberries, and Raspberries 
(K. V. Sy, K. H. McWatters, and L. R. Beuchat)

Listeria monocytogenes survival in refrigerator dill pickles  
(J. Kim, E. M. D’Sa, M. A. Harrison, J. A. Harrison, and E. L. Andress)

Microflora on Georgia-Grown Cantaloupes Related to Packaging and Handling Practices 
E. D. Akins, M. A. Harrison, and W. C. Hurst)

Migration of Caenorhabditis elegans to Manure and Manure Compost and Potential Vectoring of Salmonella Newport to Fruits and Vegetables 
(S. J. Kenney, G. L. Anderson, P. L. Williams, P. D. Millner, and L. R. Beuchat)

Infection of cantaloupe rind with Cladosporium cladosporioides and Penicillium expansum, and associated migration of Salmonella Poona into edible tissues 
(G. M. Richards and L. R. Beuchat)

Metabiotic Associations of Molds and Salmonella Poona on Intact and Wounded Cantaloupe Rind 
(G. M. Richards and L. R. Beuchat)

2003 projects (pdf file containing summaries)

Efficacy of Chlorine and a Peroxyacetic Acid Sanitizer in Killing Listeria monocytogenes on Iceberg and Romaine Lettuce Using Conditions Simulating Those Used in a Commercial Process 
(L. R. Beuchat, B. B. Adler, and M. M. Lang)

Radio-frequency Heating of Alfalfa Seed for Reducing Human Pathogens 
(S. O. Nelson, C.-Y. Lu, L. R. Beuchat, and M. A. Harrison)

Attraction of a Free-living Nematode, Caenorhabditis elegans, to Foodborne Pathogenic Bacteria, and Its Potential as a Vector of Salmonella Poona for Preharvest Contamination of Cantaloupe 
(K. N. Caldwell, G. L. Anderson, P. L. Williams, and L. R. Beuchat)

Proteolytic Yeasts Isolated from Raw, Ripe Tomatoes and Metabiotic Association of Geotrichum candidum with Salmonella  
(W. N. Wade, R. Vasdinnyei, T. Deak, and L. R. Beuchat)

Attachment of Escherichia coli O157:H7 Grown in Tryptic Soy Broth and Nutrient Broth to Apple and Lettuce as Related to Cell Hydrophobicity, Surface Charge, and Capsule Production
(A. N. Hassan and J. F. Frank)

Effect of Inoculum Size, Relative Humidity, Storage Temperature, and Ripening Stage on the  Attachment of Salmonella Montevideo to Tomatoes and Tomatillos 
(M. H. Iturriaga, E. F. Escartin, L. R. Beuchat, and R. Martinez-Peniche)

Factors Affecting Survival, Growth, and Retrieval of Salmonella Poona on Intact and Wounded Cantaloupe Rind and in Stem Scar Tissue 
(L. R. Beuchat and A. J. Scouten)

Influence of Variations in Methodology on Populations of Listeria monocytogenes Recovered from Lettuce Treated with Sanitizers
(A. B. Burnett, M. H. Iturriaga, E. F. Escartin, C. A. Pettigrew, and L. R. Beuchat)

Evaluation of Inoculation Method and Inoculum Drying Time for Their Effects on Survival and Efficiency of Recovery of Escherichia coli O157:H7, Salmonella, and Listeria monocytogenes Inoculated on the Surface of Tomatoes
(M. M. Lang, L. J. Harris, and L. R. Beuchat)

Survival and Recovery of Escherichia coli O157:H7, Salmonella, and Listeria monocytogenes on Lettuce and Parsley as Affected by Method of Inoculation, Time Between Inoculation and Analysis, and Treatment with Chlorinated Water 
(M. M. Lang, L. J. Harris, and L. R. Beuchat)

Inoculation Strategies and Parasite Recoveries from Experimentally Spiked Produce
(C. Tatum and Y. R. Ortega)