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

2007 projects (pdf file containing summaries)

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)

Culture and Detection of Campylobacter jejuni  within Mixed Microbial Populations of Biofilms on Stainless Steel
(S.Q. Sanders, D.H. Booth, J.F. Frank, and J.W. Arnold)

Proteomic Analysis of a Hypochlorous Acid Tolerant Listeria monocytogenes Cultural Variant Exhibiting Enhanced Biofilm Production
(J.P. Folsom and J.F. Frank)

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

Fate of Enterobacter sakazakii Attached to or in Biofilms on Stainless Steel Upon Exposure to Various Temperatures or Relative Humidities
(H. Kim, J. Bang, L. R. Beuchat, and J.-H. Ryu)

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)

Detection of Cryptosporidium, Giardia, and Cyclospora in Waters from Georgia
(Y.R. Ortega)

Inactivation of Pathogens in Compost Mixtures as Influenced by Type of Manure
(M.C. Erickson, C. Smith, X. Jiang, and M.P. Doyle)

2006 projects (pdf file containing summaries)

Formation of Biofilm at Different Nutrient Levels by Various Genotypes of Listeria monocytogenes 
(J.P. Folsom, G.R. Siragusa, and J.F. Frank)

Characterization of a Chlorine Tolerant Mutant of Listeria monocytogenes
(J.F. Frank and J.P. Folsom)

Cross-Contamination of Listeria monocytogenes Between Processing Equipment and Deli Meats
(L. Ma, G. Zhang, C-M. Lin, and M.P. Doyle)

Survival of Enterobacter sakazakii in Powdered Infant Formula as Affected by Composition, Water Activity, and Temperature
(J. B. Gurtler and L. R. Beuchat)

Growth of Enterobacter sakazakii in Reconstituted Infant Formula as Affected by Composition and Temperature
(J. B. Gurtler and L. R. Beuchat)

Survival of Enterobacter sakazakii in Infant Cereal as Affected by Composition, Water Activity, and Temperature
(L.-C. Lin, and L. R. Beuchat)

Survival and Growth of Enterobacter sakazakii in Infant Cereal as Affected by Composition, Reconstitution Liquid, and Storage Temperature
(L.-C. Lin and L. R. Beuchat)

Attachment and Biofilm Formation by Enterobacter sakazakii on Stainless Steel and Enteral Feeding Tubes
(H. Kim, J.-H. Ryu, and L. R. Beuchat)

Inactivation of Zoonotic Pathogens during Static Composting of Chicken Litter and Peanut Hulls
(M.C. Erickson, C. Smith, J. Liao, G.E. Boyhan, M.P. Doyle, L. Ma, and X. Jiang)

Inactivation of Escherichia coli O157:H7 and Listeria monocytogenes in Cow Manure Composting Systems
(M.C. Erickson, J. Liao, L. Ma, M.P. Doyle, and X. Jiang)

Presence of Neospora Caninum Specific Antibodies Isolated from Dairy Farms in Georgia and Texas
(Y.R. Ortega, M.P. Torres, and K.D. Mena)

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)

2005 projects (pdf file containing summaries)

Evaluation of Listeria innocua as a Surrogate for Listeria monocytogenes in Aerosol Studies
(G. Zhang, L. Ma, and M. P. Doyle)

Effects of Bile Salts on growth of Listeria monocytogenes
(G. Anderson, S. Lambert, and M.A. Smith)

Death of Salmonella, Escherichia coli O157:H7, and Listeria monocytogenes in Shelf-stable, Dairy-based, Pourable Salad Dressings
(L. R. Beuchat, J.-H. Ryu, B. B. Adler, and M. D. Harrison)

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)

Inactivation of Salmonella in Manure-based Composts with Varying C:N Ratios
(M. C. Erickson, J. Liao, L. Ma, X. Jiang, and M. P. Doyle)

Potential Role of Diploscapter sp. Strain LKC25, a Bacterivorous Nematode from Soil, as a Vector of Food-borne pathogenic Bacteria to Preharvest Fruits and Vegetables
(D. S. Gibbs, G. L. Anderson, L. R. Beuchat, L. K. Carta, and P. L. Williams)

Contamination of Commercial Broiler Breeder Roosters by Campylobacter, Salmonella, and Clostridium perfringens
(N. A. Cox, C. L. Hofacre, R. J. Buhr, J. L. Wilson, J. S. Bailey, L. J. Richardson, D. E. Cosby, M. T. Musgrove, K. L. Hiett, and S. M. Russell)

Intestinal Community Structure of Chickens in Response to Orally Administered Tetracycline
(A. S. Fairchild, J. L. Smith, U. Idris, J. Lu, S. Sanchez, L. B. Purvis, C. Hofacre, and M. D. Lee)

Resident Populations of Enterococci on Poultry Farms in Response to Antimicrobial Usage
(A. L. Debnam, C. R. Jackson, G. E. Avellaneda, J. B. Barrett, and C. L. Hofacre)

Contamination of Internal Organs by Campylobacter jejuni Following Oral or Intracloacal Inoculations of Broiler Chicks
(N. A. Cox, C. L. Hofacre, J. S. Bailey, R. J. Buhr, J. L. Wilson, K. L. Hiett, L. J. Richardson, M. T. Musgrove, D. E. Cosby, J. D. Tankson, Y. L. Vizzier, P. F. Cry, L. E. Vaughn, P. S. Holt, and D. V. Bourassa)

2004 projects (pdf file containing summaries)

Shedding of foodborne pathogens by Caenorhabditis elegans in compost-amended and unamended soil
(G. L. Anderson, S. J. Kenney, L. R. Beuchat, and P. L. Williams)

Persistence of Escherichia coli O157:H7, Salmonella Newport, and Salmonella Poona in the Gut of a Free-living Nematode, Caenorhabditis elegans, and Transmission to Progeny and Uninfected Nematodes 
(S. J. Kenney, G. L. Anderson, P. L. Williams, P. D. Millner, and L. R. Beuchat)

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)

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

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

The Microbial Community Structure of the Chicken Intestine  
(M.D. Lee)

Fate of acid-adapted and nonadapted Escherichia coli, Listeria monocytogenes, and Salmonella on ground or whole beef jerky 
(R. A. Morrow, M. A. Harrison, and J. A. Harrison)

Attachment and Biofilm Formation by Escherichia coli O157:H7 on Stainless Steel as Influenced by Exopolysaccharide Production, Nutrient Availability, and Temperature  
(J.-H. Ryu, H. Kim, and L. R. Beuchat)

Biofilm Formation by Escherichia coli O157:H7 on Stainless Steel and Its Resistance to Chlorine as Affected by Exopolysaccharide and Curli Production 
(J.-H. Ryu and L. R. Beuchat)

The role of aerosol in transmission of microorganisms (including Listeria) to ready-to-eat meat/poultry products
(L. Ma, C. M. Lin, Z. Yan, J. Kornacki, O. Oyarzabal, and M.P. Doyle)

2003 projects (pdf file containing summaries)

Surface Material, Temperature and Soil Effects on the Survival of Selected Foodborne Pathogens in the Presence of Condensate 
(J. Allan, J. L. Kornacki, and Z. Yan)

Factors Affecting Production of Extracellular Carbohydrate Complexes By Escherichia coli O157:H7 
(J.-H. Ryu and L. R. Beuchat)

Ethanol-mediated Variations in Cellular Fatty Acid Composition and Protein Profiles of Two Genotypically Different Strains of Escherichia coli O157:H7 
(R. Y.-Y. Chiou, R. D. Phillips, P. Zhao, M. P. Doyle, 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)

Interaction of a Free-living Soil Nematode, Canenorhabditis elegans, with Surrogates of Foodborne Pathogenic Bacteria 
(G. L. Anderson, K. N. Caldwell, L. R. Beuchat, and P. L. Williams)

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)

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)

Intestinal Carriage of Campylobacter and Salmonella in Turkeys in Response to Sub-therapeutic Levels of Antimicrobials in Feed 
(N. A. Cox, S. E. Craven, M. T. Musgrove, M. E. Berrang, and N. J. Stern)