Articles

Biofilms: At the Interface between Biophysics and Microbiology (with A. Rodriguez, D. Perez-Conesa, and J. Weiss), Food Biophysics (2006)

This article highlights the role of biophysical principles in biofilm growth and propagation in food...

 

Inhibition and Inactivation of Listeria monocytogenes and Escherichia coli O157:H7 Colony Biofilms by Micellar-Encapsulated Eugenol and Carvacrol (with D. Perez-Conesa and J. Weiss), Journal of Food Protection (2006)

The antimicrobial efficacy of carvacrol and eugenol, two essential oil compounds, encapsulated in a micellar...

 

Levels and Tracking of Listeria monocytogenes Strains in a Seafood-Processing Environment using Enrichment Most Probable Number and Randomly Amplified Polymorphic DNA (with J. Cao, C. Cronin, M. Clark, R. Witkowsky, H. Lu, A. Sayeddahaman, and R.E. Levin), Journal of Food Protection (2006)

Concentrations of environmental microflora and Listeria monocytogenes were monitored at multiple environmental locations within a...

 

Curli production and biofilm formation of Escherichia coli O157:H7 under varying nutrient conditions (with P. Prachaiyo), Applied and Environmental Microbiology (2004)

The resistance of Escherichia coli O157:H7 strains ATCC 43895-, 43895-EPS (an exopolysaccharide [EPS]-overproducing mutant), and...

 

Oil-in-water emulsion as a model system to study the growth of E. coli O157:H7 in a heterogenous food system (with P. Prachaiyo), Journal of food Science (2003)

Oil-in-water emulsions (hexadecane, minimal media [M9], and Tween 20) were used as model system to...

 

Microtiter plate assay for assessment of Listeria monocytogenes biofilm formation (with D. Djordjevic and M. Wiedmann), Appl. Environ. Microbiol (2002)
 

Interaction between emulsion droplets and Escherichia coli cells (with J. Li and D.J. McClements), Journal of Food Science (2001)

Oil-in-water emulsions (20% n-hexadecane, v/v) were stabilized by dodecyltrimethylammonium bromide (DTAB), Tween 20, or sodium...

 

A microscopic method to visualize Escherichia coli interaction with beef muscle (with P. Prachaiyo), Journal of Food Protection (2000)

The genetic determinant for enhanced green fluorescent protein (EGFP) was introduced into Escherichia coli JM109...

 

PCR reaction parameter titration as an approach to develop shortened reaction times in a conventional thermal cycler (with W.K. Shaw), Journal of Rapid Methods & Automation in Microbiology (2000)

A shortened PCR procedure was developed in a conventional thermal cycler. Overnight cultures of E....

 

Studies in the growth of Escherichia coli O157:H7 strains at 45.5°C (with J. Fernec, J. Oliver, R. Witkowski, and R. Levin), Journal of Food Protection (2000)

The objectives of the present report were to examine the ability of 18 strains of...

 

The effects of the surface charge and hydrophobicity of Escherichia coli in its adhesion to beef muscle (with J. Li), International Journal of Food Microbiology (1999)

The surface characteristics of Escherichia coli strains were studied to evaluate the effect upon bacterial...

 

High-frequency intracellular infection and erythrogenic toxin A expression undergo phase variation in M1 group A streptococci (with P. Cleary, L. Ikeda, D. Cue, J. Krawcxak, and H. Lam), Molecular Microbiology (1998)

A clonal variant of serotype M1 group A streptococcus, strain 90-131, disseminated to several continents,...

 

Synergistic effect of combination of lactococcal phage resistance fragments of pNP40 with cloned abortive infection gene abiD (with L. Sechard and L.L. McKay), Journal of Dairy Science (1998)

Two fragments conferring partial phage resistance were located on plasmid pNP40 from Lactococcus lactis ssp....

 

C5a peptidase alters clearance and trafficking of group A streptococci by infected mice (with Y. Ji, A. Kondagunta, and P.P. Cleary), Infection and Immunity (1996)

Group A streptococcal C5a peptidase (SCPA) specifically cleaves the human serum chemotaxin C5a at the...

 

Cloning and characterization of the abortive infection genetic determinant abiD isolated for pBF61 of Lactococcus lactis subsp. lactis KR5 (with K.M. Kolaetis, T. Requena, and L.L. McKay), Applied and Environmental Microbiology (1995)

A 6.3-kb fragment from pBF61 in Lactococcus lactis subsp. lactis KR5 was cloned and found...

 

Differential expression of genes in the vir regulon (with P.P. Cleary and K. Hoikka Prichard), Developments in Biological Standardization (1995)

Streptococcal C5a peptidase (SCP), encoded by scpA in Streptococcus pyogenes, is a surface molecule which...

 

Insertional inactivation of virR in Streptococcus pyogenes M49 demonstrates that VirR functions as a positive regulator of ScpA, FcRA, OF, and M protein (with P.P. Cleary), FEMS Microbiology Letters (1995)

Several reports have shown that Streptococcus pyogenes strains which produce opacity factor (OF+) have diverged...

 

Insertional inactivation of virR in Streptococcus pyogenes M49 demonstrates that VirR functions as a positive regulator of streptococcal C5a peptidase and M protein in OF+ strains (with P.P. Cleary), Developments in Biological Standardization (1995)

Mutational analysis confirms the presence of a positively controlled virulence regulon in the OF+ lineage...

 

A 6 h microslide immunodiffusion assay for confirmed detection of staphylococcal enterotoxins (with S.R. Tatini), Letters in Applied Microbiology (1991)

Use of appropriately balanced immunological reagents and incubation of microslides at 45 degrees C resulted...

 

Books

Food Microbiology Laboratory (2004)
 

Instructor’s guide to Food Microbiology Laboratory (with W.K. Shaw) (2004)
 

Presentations

Characterization of a swarming phenotype of Listeria innocua on semi-solid surfaces (with E. Apostilides), 90th Annual Meeting Program and Abstracts (2003)
 

Characterization of Listeria innocua biofilm formation using Tn917 transposon mutagenesis (with W.K. Shaw Jr.), IAFP 2003 90th Annual Meeting Program and Abstracts. (2003)
 

Food Safety Education Through Inquiry-Based Learning (with M. Sherburne, N. Cohen, R. Brennan Olson, and M.J. Laus), Massachusetts Dietetics Association Fall Conference (2003)
 

Monitoring of levels and tracking of Listeria monocytogenes strains in a seafood processing environment using enrichment MPN and RAPD (with C. Cronin, M. Clark, R. Witkowsky, H. Lui, A. Sayedahmed, and R.E. Levin), 90th Annual Meeting Program and Abstracts. (2003)
 

Monitoring of microflora present within a seafood processing environment using plating methodology and denaturing gradient gel electrophoresis (with M. Avallone, M. Clark, R. Witkowsky, H. Lui, A. Sayedahmad, and R.E. Levin), IFT Annual Meeting Book of Abstracts (2003)
 

Growth of E. coli O157:H7 in oil-in-water emulsions (with P. Prachiayo), Annual Meeting Book of Abstracts (2001)
 

Microtiter plate assay for assessment of Listeria monocytogenes biofilm formation (with D. Djordjevic), Annual Meeting Book of Abstracts (2001)
 

Binding of enterohemorrahagic E. coli to isolated meat components (with P. Prachaiyo and J. Li), IFT Annual Meeting Book of Abstracts (1999)
 

Development of a model system to study the interaction of E. coli with beef muscle (with P. Prachaiyo), Proceedings of the 52nd Annual Reciprocal Meat Conference (1999)
 

Electrostatic interaction between emulsion droplets and bacterial cells (with J. Li), IFT Annual Meeting Book of Abstracts (1999)
 

Rapid preparation of PCR samples form food combined with shortened PCR cycles for the detection of E. coli (with W.K. Shaw), IAMFES 86th Annual Meeting (1999)
 

Comparison of a PCR-electrophoresis vs a PCR-ELISA method for the rapid and sensitive detection and enumeration of E. coli (with W. Shaw), IFT Annual Meeting Book of Abstracts (1998)
 

Distribution of pathogenic factors among Escherichia coli O157:H7 isolate to determine conserved PCR target sequences (with M. Wu), IFT Annual Meeting Book of Abstracts (1998)
 

Enhanced green fluorescent protein expression in Escherichia coli to study the penetration of meat (with P. Prachaiyo), IFT Annual Meeting Book of Abstracts (1998)
 

Surface characteristics of bacterial cells after antimicrobial wash treatments (with C. Amoako-Atta), Proceedings of the 51st Annual Reciprocal Meat Conference (1998)
 

Construction of plasmids which confer enhanced bacteriophage resistance by using phage resistance mechanisms isolated form two different strains of lactococci (with L. Sechaud and L.L. McKay), IVth International ASM Conference on Streptococcal Genetics program and abstracts (1994)
 

Insertional inactivation of virR in Streptococcus pyogenes M49 demonstrates that VirR functions as a positive regulator of streptococcal C5a peptidase and M protein in OF+ strains (with P.P. Cleary), IVth International ASM Conference on Streptococcal Genetics program and abstracts (1994)
 

Sequencing and Tn5 mutagenesis of the bacteriophage abortive infection genetic determinants of plasmid pBF61 from Lactococcus lactis subsp. lactis KR5 (with R. Requena and L.L. McKay), Abstracts of the 93rd General Meeting of the American Society for Microbiology (1993)
 

Cloning and analysis of the bacteriophage abortive infection genetic determinants of plasmid pBF61 from Lactococcus lactis subsp. lactis KR5 (with K.M. Kolaetis and L.L. McKay), Abstracts of the 92nd General Meeting of the American Society for Microbiology (1992)
 

A six hour microslide immunodiffusion assay for detection of staphylococcal enterotoxins (with S.R. Tantini), Abstracts of the 89th General Meeting of the American Society for Microbiology (1989)