Food Protection Trends - July 2010 - 407
FIGURE 2. Aerobic microflora in sliced (A) and grated (B) carrots and E. coli in sliced (A) and grated (B) carrots stored at 10°C
1B). At 72 h of storage, native microflora counts in sliced carrot samples were in the range of 8.50–9.00 log10 CFU/g. At the same time, bacteria counts in the control grated carrot (Fig. 1B) were approximately 1 log higher compared to control sliced carrot (Fig. 1A). In contrast, there were no significant differences in aerobic bacterial counts between sliced and grated carrot samples inoculated with three pathogen levels at 72 h of storage (Fig. 1A-B). Initial E. coli counts in control and samples inoculated with low and medium levels of pathogens were similar in both types of processed carrot (Fig. 1C and D). At the end of storage, E. coli counts in all sliced carrot samples were in the range of 6.80–8.90 log10 CFU/g (Fig. 1C), whereas lower E. coli counts (6.00–8.00 log10 CFU/g) were observed in grated carrot samples (Fig. 1D).
Figure 2 shows the results obtained from sliced and grated carrots inoculated with three levels of E. coli O157:H7 and stored at 10°C. In both types of processed carrot samples, initial aerobic microflora counts were in the range of 5.80–6.20 log10 CFU/g. At 72 h of storage, aerobic counts in sliced carrot were 1.80–2.20 log higher than the counts in grated carrot (Fig. 2A and B). In agreement with what was observed at 20°C, no significant differences were found between initial E. coli counts corresponding to control samples and low and medium inoculated samples (Fig. 2C and D). At 72 h of storage, E. coli counts in sliced and grated carrot samples were in the range of 6.70–7.80 and 6.20–6.70 log10 CFU/g, respectively. The biocontrol exerted by native microflora on E. coli growth, in both types of processed carrot, was not
significant. Storage temperature was not a factor, as similar results were observed in carrot samples stored at 20 and 10°C.
Inhibitory effects of oregano and rosemary oleoresins on native microflora and E. coli O157:H7 inoculated in carrot samples stored at 10 and 20°C
The effect of oleoresin application on E. coli in carrots was determined immediately after treatment and during storage. The microbial load of aerobic mesophilic microflora and E. coli present in sliced and grated carrots was determined. For the inoculated sample with the addition of oleoresins, we selected a medium level of pathogen inoculation, simulating an accidental contamination.
JULY 2010 | FOOD PROTECTION TRENDS
407
Food Protection Trends - July 2010
Table of Contents for the Digital Edition of Food Protection Trends - July 2010
Food Protection Trends - July 2010
Contents
Sustaining Members
Vickie’s View from Your President
Commentary from the Executive Director
Impact of Oregano and Rosemary Oleoresins on Native Microflora and E. coli O157:H7 Growth on Sliced and Grated Carrots
Food Safety Training Needs Assessment for Independent Ethnic Restaurants: Review of Health Inspection Data in Kansas
New Members
What’s Happening in Food Safety
Industry Products
Award Recipients
Committee Meetings
Ivan Parkin Lecture
John H. Silliker Lecture
Special Contributors and Sponsors
Preliminary Program
Activities
General Information
Workshops
Registration Rates
Coming Events
Advertising Index
Journal of Food Protection Table of Contents
Booklet Order Form
Membership Application
Food Protection Trends - July 2010 - Food Protection Trends - July 2010
Food Protection Trends - July 2010 - Cover2
Food Protection Trends - July 2010 - 389
Food Protection Trends - July 2010 - Contents
Food Protection Trends - July 2010 - 391
Food Protection Trends - July 2010 - 392
Food Protection Trends - July 2010 - 393
Food Protection Trends - July 2010 - 394
Food Protection Trends - July 2010 - 395
Food Protection Trends - July 2010 - 396
Food Protection Trends - July 2010 - Sustaining Members
Food Protection Trends - July 2010 - 398
Food Protection Trends - July 2010 - 399
Food Protection Trends - July 2010 - Vickie’s View from Your President
Food Protection Trends - July 2010 - 401
Food Protection Trends - July 2010 - Commentary from the Executive Director
Food Protection Trends - July 2010 - 403
Food Protection Trends - July 2010 - Impact of Oregano and Rosemary Oleoresins on Native Microflora and E. coli O157:H7 Growth on Sliced and Grated Carrots
Food Protection Trends - July 2010 - 405
Food Protection Trends - July 2010 - 406
Food Protection Trends - July 2010 - 407
Food Protection Trends - July 2010 - 408
Food Protection Trends - July 2010 - 409
Food Protection Trends - July 2010 - 410
Food Protection Trends - July 2010 - 411
Food Protection Trends - July 2010 - Food Safety Training Needs Assessment for Independent Ethnic Restaurants: Review of Health Inspection Data in Kansas
Food Protection Trends - July 2010 - 413
Food Protection Trends - July 2010 - 414
Food Protection Trends - July 2010 - 415
Food Protection Trends - July 2010 - 416
Food Protection Trends - July 2010 - 417
Food Protection Trends - July 2010 - 418
Food Protection Trends - July 2010 - 419
Food Protection Trends - July 2010 - 420
Food Protection Trends - July 2010 - 421
Food Protection Trends - July 2010 - 422
Food Protection Trends - July 2010 - 423
Food Protection Trends - July 2010 - New Members
Food Protection Trends - July 2010 - 425
Food Protection Trends - July 2010 - 426
Food Protection Trends - July 2010 - 427
Food Protection Trends - July 2010 - What’s Happening in Food Safety
Food Protection Trends - July 2010 - 429
Food Protection Trends - July 2010 - 430
Food Protection Trends - July 2010 - Industry Products
Food Protection Trends - July 2010 - 432
Food Protection Trends - July 2010 - 433
Food Protection Trends - July 2010 - 434
Food Protection Trends - July 2010 - 435
Food Protection Trends - July 2010 - Award Recipients
Food Protection Trends - July 2010 - Committee Meetings
Food Protection Trends - July 2010 - Ivan Parkin Lecture
Food Protection Trends - July 2010 - John H. Silliker Lecture
Food Protection Trends - July 2010 - Special Contributors and Sponsors
Food Protection Trends - July 2010 - Preliminary Program
Food Protection Trends - July 2010 - Activities
Food Protection Trends - July 2010 - General Information
Food Protection Trends - July 2010 - Workshops
Food Protection Trends - July 2010 - 445
Food Protection Trends - July 2010 - Registration Rates
Food Protection Trends - July 2010 - 447
Food Protection Trends - July 2010 - 448
Food Protection Trends - July 2010 - 449
Food Protection Trends - July 2010 - 450
Food Protection Trends - July 2010 - Coming Events
Food Protection Trends - July 2010 - 452
Food Protection Trends - July 2010 - Advertising Index
Food Protection Trends - July 2010 - Journal of Food Protection Table of Contents
Food Protection Trends - July 2010 - Booklet Order Form
Food Protection Trends - July 2010 - Membership Application
Food Protection Trends - July 2010 - Cover3
Food Protection Trends - July 2010 - Cover4
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