Food Protection Trends - November 2008 - 828

Roel Otto (Purac Biochem) focused on the potential of ε-polylysine and certain monoglycerol and lactic acid esters of C8 – C14 fatty acids to suppress the growth of Enterobacteriaceae. However, the growth of Salmonella and E. coli were unaffected by specific concentrations of the synergy. Yanhong Liu (USDA-ARS-ERRC) was dynamic in presenting critical information on “Gene Expression Profiling of Listeria monocytogenes Strain F2365 in UHT Pasteurized Skim Milk.” Liu’s work demonstrated that compared to Listeria monocytogenes grown in brain heart infusion broth genes were up-regulated in UHT pasteurized skim milk, whereas 14 genes were down-regulated. Her study showed that while the oxidative stress was not higher in the ultra high pasteurization matrix of skim milk, but the ABC transporters of the organism were increased in this environment. Palmer (Cornell University) examined antimicrobial peptides and bacteriocin resistance of sigma B subunit in Listeria monocytogenes concluding that lmo 2570 is sigma dependent but has no role in resistance. Jie Wei (University of Delaware) presented interesting information on the topic of Norovirus survival in biosolids. Her results pointed out that the Murine Norovirus showed log reduction at different temperatures further demonstrating that survival of Murine Norovirus is dependent on biosolid type, treatment and storage conditions. Alexandra Derevianko (University of Delaware) outlined the effect of zero-valent iron on removal of E. coli O157:H7 from agricultural waters. The study demonstrated that the ability of zero-valent iron to remove and inactivate E. coli O157:H7 showed great potential for reducing irrigation water contamination. Transcription analysis of E. coli O157:H7 under acidic conditions was presented by Kristina Carter (University of Tennessee). The master virulence regulator of Listeria monocytogenes, PrfA, and sigB were examined by Reid Ivy (Cornell University) comparing their activity at and below 37˚C. The organism proved to be more invasive at 30˚C demonstrating that cells grown at different temperatures invade differently. Kendra Nightingale (Colorado State University) presented on “Virulence Attenuated Listeria monocytogenes Commonly Isolated from Food Show Potential to Confer Protective Immunity.” Nightingale’s work with guinea pigs exposed to Listeria monocytogenes shows immunization promise for the use of interlin A with premature stop codons. The five gene multiplex primer PCR used by Carlson (Colorado State University) when examining bovine E. coli O157 adherence to human intestinal cells was intriguing because it screened for multiple 828 FOOD PROTECTION TRENDS | NOVEMBER 2008 virulence genes at once and pointed out genotypes without stx genes had enhanced attachment. Daniel Tadesse from The Ohio State University presented on “Molecular Epidemiology and Characterization of Virulence Gene in Yersinia enterocolitica Isolated from Swine.” The study indicated that swine carry pathogenic Yersinia enterocolitica strains, an important source of human infection. t2 – Antimicrobials and General Microbiology technical Session Heidi Weinkauf, Iowa State University and Hudaa Neetoo, University of Delaware Dr. Fernando Luciano opened the session describing the antimicrobial activity of Allyl isothiocyanate (AIT) emphasizing the implication of different pHs as well as the possibility of antimicrobial activity due to degradation products of AIT. Dr. C. G. Weber then addressed the audience on the antimicrobial effects of persimmon. Persimmon puree (1–10%) was found to be effective at reducing growth of the gram-positive bacteria, Listeria monocytogenes in a liquid media. However, persimmon was not found to be effective against the gram-negative Escherichia coli O157:H7. Tammy Platt described a feedlot study that evaluated the effect of administered diets containing tylosin and monensin on the antimicrobial resistance development of isolated Enterococcus strains. Results indicated that the administration of sub-therapeutic antimicrobials to livestock had a negligible effect on the transfer of resistance to humans via the food supply. The first half of the session was concluded with a presentation underscoring the ability of VERDAD, a new clean label product, to effectively control the growth of L. monocytogenes in both cured and uncured products, with optimal use levels of around 3–4% in an uncured product. In the second half of the session, Fedorka Cray presented his findings on the antimicrobial resistance in Campylobacter isolates recovered from chicken carcass rinsates in 2007. He demonstrated that overall C. coli isolates tend to be more refractory to antimicrobial agents than C. jejuni isolates. Yumei Dai subsequently presented his research on the quantification and modeling of the antimicrobial efficacy of triple combinations of lauric arginate (LAE), cinnamic acid and Na-benzoate or K-sorbate against four spoilage yeasts to determine possible synergistic, additive or antagonistic activities between the antimicrobials. The speaker showed that triplet combinations of LAE, cinnamic acid, Na-benzoate or K-sorbate exhibited a high degree of synergism and pointed to the need of

Food Protection Trends - November 2008

Table of Contents for the Digital Edition of Food Protection Trends - November 2008

Food Protection Trends - November 2008
Contents
Sustaining Members
Perspectives from Your President
Commentary from the Executive Director
Biofilm Formation of Listeria monocytogenes on Various Conveyor Belt Surfaces
Third-Party Certification of Agro-Products in China: A Study of Agro-Product Producers in Guangzhou, Shenzhen, Hangzhou and Qingdao
IAFP 2008 in Review
Award Winners
3M Microbiology - Black Pearl Award Winner
Ivan Parkin Lecture - Russell S. Flowers
John H. Silliker Lecture - Michael P. Doyle
Student Travel Scholarships
Session Summaries
Highlights of the Executive Board Meeting
Minutes of the 95th Annual Business Meeting
Committee Minutes
Executive Board Response to Committee Recommendations
Exhibitors of IAFP 2008
Special Contributors and Sponsors
Call for Awards - IAFP 2009
New Members
What's Happening in Food Safety
Industry Products
Coming Events
Advertising Index
Journal of Food Protection Table of Contents
Audiovisual Library Order Form
Booklet Order Form
Membership Application
Food Protection Trends - November 2008 - Food Protection Trends - November 2008
Food Protection Trends - November 2008 - Cover2
Food Protection Trends - November 2008 - 745
Food Protection Trends - November 2008 - Contents
Food Protection Trends - November 2008 - 747
Food Protection Trends - November 2008 - 748
Food Protection Trends - November 2008 - 749
Food Protection Trends - November 2008 - 750
Food Protection Trends - November 2008 - 751
Food Protection Trends - November 2008 - 752
Food Protection Trends - November 2008 - Sustaining Members
Food Protection Trends - November 2008 - 754
Food Protection Trends - November 2008 - 755
Food Protection Trends - November 2008 - Perspectives from Your President
Food Protection Trends - November 2008 - 757
Food Protection Trends - November 2008 - Commentary from the Executive Director
Food Protection Trends - November 2008 - 759
Food Protection Trends - November 2008 - Biofilm Formation of Listeria monocytogenes on Various Conveyor Belt Surfaces
Food Protection Trends - November 2008 - 761
Food Protection Trends - November 2008 - 762
Food Protection Trends - November 2008 - 763
Food Protection Trends - November 2008 - 764
Food Protection Trends - November 2008 - Third-Party Certification of Agro-Products in China: A Study of Agro-Product Producers in Guangzhou, Shenzhen, Hangzhou and Qingdao
Food Protection Trends - November 2008 - 766
Food Protection Trends - November 2008 - 767
Food Protection Trends - November 2008 - 768
Food Protection Trends - November 2008 - 769
Food Protection Trends - November 2008 - 770
Food Protection Trends - November 2008 - IAFP 2008 in Review
Food Protection Trends - November 2008 - 772
Food Protection Trends - November 2008 - 773
Food Protection Trends - November 2008 - 774
Food Protection Trends - November 2008 - 775
Food Protection Trends - November 2008 - Award Winners
Food Protection Trends - November 2008 - 777
Food Protection Trends - November 2008 - 778
Food Protection Trends - November 2008 - 779
Food Protection Trends - November 2008 - 780
Food Protection Trends - November 2008 - 781
Food Protection Trends - November 2008 - 782
Food Protection Trends - November 2008 - 783
Food Protection Trends - November 2008 - 784
Food Protection Trends - November 2008 - 785
Food Protection Trends - November 2008 - 786
Food Protection Trends - November 2008 - 787
Food Protection Trends - November 2008 - 788
Food Protection Trends - November 2008 - 789
Food Protection Trends - November 2008 - 790
Food Protection Trends - November 2008 - 791
Food Protection Trends - November 2008 - 792
Food Protection Trends - November 2008 - 793
Food Protection Trends - November 2008 - 3M Microbiology - Black Pearl Award Winner
Food Protection Trends - November 2008 - 795
Food Protection Trends - November 2008 - Ivan Parkin Lecture - Russell S. Flowers
Food Protection Trends - November 2008 - 797
Food Protection Trends - November 2008 - 798
Food Protection Trends - November 2008 - 799
Food Protection Trends - November 2008 - John H. Silliker Lecture - Michael P. Doyle
Food Protection Trends - November 2008 - 801
Food Protection Trends - November 2008 - 802
Food Protection Trends - November 2008 - 803
Food Protection Trends - November 2008 - Student Travel Scholarships
Food Protection Trends - November 2008 - 805
Food Protection Trends - November 2008 - 806
Food Protection Trends - November 2008 - 807
Food Protection Trends - November 2008 - Session Summaries
Food Protection Trends - November 2008 - 809
Food Protection Trends - November 2008 - 810
Food Protection Trends - November 2008 - 811
Food Protection Trends - November 2008 - 812
Food Protection Trends - November 2008 - 813
Food Protection Trends - November 2008 - 814
Food Protection Trends - November 2008 - 815
Food Protection Trends - November 2008 - 816
Food Protection Trends - November 2008 - 817
Food Protection Trends - November 2008 - 818
Food Protection Trends - November 2008 - 819
Food Protection Trends - November 2008 - 820
Food Protection Trends - November 2008 - 821
Food Protection Trends - November 2008 - 822
Food Protection Trends - November 2008 - 823
Food Protection Trends - November 2008 - 824
Food Protection Trends - November 2008 - 825
Food Protection Trends - November 2008 - 826
Food Protection Trends - November 2008 - 827
Food Protection Trends - November 2008 - 828
Food Protection Trends - November 2008 - 829
Food Protection Trends - November 2008 - 830
Food Protection Trends - November 2008 - 831
Food Protection Trends - November 2008 - 832
Food Protection Trends - November 2008 - Highlights of the Executive Board Meeting
Food Protection Trends - November 2008 - Minutes of the 95th Annual Business Meeting
Food Protection Trends - November 2008 - 835
Food Protection Trends - November 2008 - Committee Minutes
Food Protection Trends - November 2008 - 837
Food Protection Trends - November 2008 - 838
Food Protection Trends - November 2008 - 839
Food Protection Trends - November 2008 - 840
Food Protection Trends - November 2008 - 841
Food Protection Trends - November 2008 - 842
Food Protection Trends - November 2008 - 843
Food Protection Trends - November 2008 - 844
Food Protection Trends - November 2008 - 845
Food Protection Trends - November 2008 - 846
Food Protection Trends - November 2008 - 847
Food Protection Trends - November 2008 - 848
Food Protection Trends - November 2008 - 849
Food Protection Trends - November 2008 - 850
Food Protection Trends - November 2008 - 851
Food Protection Trends - November 2008 - 852
Food Protection Trends - November 2008 - 853
Food Protection Trends - November 2008 - 854
Food Protection Trends - November 2008 - 855
Food Protection Trends - November 2008 - 856
Food Protection Trends - November 2008 - 857
Food Protection Trends - November 2008 - Executive Board Response to Committee Recommendations
Food Protection Trends - November 2008 - 859
Food Protection Trends - November 2008 - 860
Food Protection Trends - November 2008 - 861
Food Protection Trends - November 2008 - 862
Food Protection Trends - November 2008 - 863
Food Protection Trends - November 2008 - 864
Food Protection Trends - November 2008 - 865
Food Protection Trends - November 2008 - Exhibitors of IAFP 2008
Food Protection Trends - November 2008 - 867
Food Protection Trends - November 2008 - 868
Food Protection Trends - November 2008 - 869
Food Protection Trends - November 2008 - 870
Food Protection Trends - November 2008 - Special Contributors and Sponsors
Food Protection Trends - November 2008 - 872
Food Protection Trends - November 2008 - 873
Food Protection Trends - November 2008 - Call for Awards - IAFP 2009
Food Protection Trends - November 2008 - 875
Food Protection Trends - November 2008 - New Members
Food Protection Trends - November 2008 - 877
Food Protection Trends - November 2008 - 878
Food Protection Trends - November 2008 - 879
Food Protection Trends - November 2008 - What's Happening in Food Safety
Food Protection Trends - November 2008 - 881
Food Protection Trends - November 2008 - 882
Food Protection Trends - November 2008 - 883
Food Protection Trends - November 2008 - 884
Food Protection Trends - November 2008 - Industry Products
Food Protection Trends - November 2008 - 886
Food Protection Trends - November 2008 - 887
Food Protection Trends - November 2008 - 888
Food Protection Trends - November 2008 - Coming Events
Food Protection Trends - November 2008 - 890
Food Protection Trends - November 2008 - Advertising Index
Food Protection Trends - November 2008 - Journal of Food Protection Table of Contents
Food Protection Trends - November 2008 - 893
Food Protection Trends - November 2008 - Audiovisual Library Order Form
Food Protection Trends - November 2008 - Booklet Order Form
Food Protection Trends - November 2008 - Membership Application
Food Protection Trends - November 2008 - Cover3
Food Protection Trends - November 2008 - Cover4
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