scholarly journals Effect of modified atmosphere packaging on the growth of spoilage microorganisms and Listeria monocytogenes on fresh cheese

2018 ◽  
Vol 101 (9) ◽  
pp. 7768-7779 ◽  
Author(s):  
Stephanie R.B. Brown ◽  
Emily C. Forauer ◽  
Dennis J. D'Amico
Keyword(s):  
Listeria Monocytogenes ◽  
Modified Atmosphere Packaging ◽  
Modified Atmosphere ◽  
Fresh Cheese ◽  
Spoilage Microorganisms

Influence of argon modified atmosphere packaging on the growth potential of strains of Listeria monocytogenes and Escherichia coli

Food Control ◽  
2016 ◽  
Vol 59 ◽  
pp. 513-523 ◽  
Author(s):  
Victoria Heinrich ◽  
Marija Zunabovic ◽  
Lisa Nehm ◽  
Johannes Bergmair ◽  
Wolfgang Kneifel
Keyword(s):  
Escherichia Coli ◽  
Listeria Monocytogenes ◽  
Modified Atmosphere Packaging ◽  
Growth Potential ◽  
Modified Atmosphere

scholarly journals Growth Potential of Listeria monocytogenes on Refrigerated Spinach and Rocket Leaves in Modified Atmosphere Packaging

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1211
Author(s):  
Paul Culliney ◽  
Achim Schmalenberger
Keyword(s):  
Listeria Monocytogenes ◽  
Modified Atmosphere Packaging ◽  
Growth Curves ◽  
High Growth ◽  
Food Product ◽  
Growth Potential ◽  
Modified Atmosphere ◽  
Visual Appearance ◽  
Iceberg Lettuce ◽  
Duration Of Storage

Minimally processed ready-to-eat (RTE) vegetables are increasingly consumed for their health benefits. However, they also pose a risk of being ingested with food-borne pathogens. The present study investigated the ability of RTE spinach and rocket to support the growth of Listeria monocytogenes as previous studies provided contradicting evidence. Findings were compared to growth on iceberg lettuce that has repeatedly been shown to support growth. Products were inoculated with a three-strain mix of L. monocytogenes at 10 and 100 cfu g−1 and stored in modified atmosphere (4 kPa O2, 8 kPa CO2) at 8 °C over 7–9 days. Spinach demonstrated the highest growth potential rate of 2 to 3 log10 cfu g−1 over a 9-day period with only marginal deterioration in its visual appearance. Growth potential on rocket was around 2 log10 cfu g−1 over 9 days with considerable deterioration in visual appearance. Growth potential of iceberg lettuce was similar to that of rocket over a 7-day period. Growth curves fitted closely to a linear growth model, indicating none to limited restrictions of growth over the duration of storage. The high growth potentials of L. monocytogenes on spinach alongside the limited visual deterioration highlight the potential risks of consuming this raw RTE food product when contaminated.

Effects of Microbial Inhibitors and Modified Atmosphere Packaging on Growth of Listeria monocytogenes and Salmonella enterica Typhimurium and on Quality Attributes of Injected Pork Chops and Sliced Cured Ham

2006 ◽  
Vol 69 (11) ◽  
pp. 2671-2680 ◽  
Author(s):  
ANDREW R. MICHAELSEN ◽  
JOSEPH G. SEBRANEK ◽  
JAMES S. DICKSON
Keyword(s):  
Listeria Monocytogenes ◽  
Salmonella Enterica ◽  
Modified Atmosphere Packaging ◽  
Inhibitory Effect ◽  
Modified Atmosphere ◽  
High Co2 ◽  
Pork Products ◽  
C Storage ◽  
Potassium Lactate ◽  
High Concentrations

This study was designed to determine the inhibitory effects of modified atmosphere packaging (MAP), both alone and in combination with potassium lactate and sodium diacetate (PLSD), on selected pathogens common to pork products. Effects of the treatments on product quality also were assessed. The hypothesis was that high-CO2 MAP would increase the effectiveness of PLSD for inhibition of pork pathogens. Fresh chops from untreated pork loins and loins that were injected with PLSD were inoculated with Salmonella enterica Typhimurium, and slices of untreated hams and hams that were injected with PLSD were inoculated with Listeria monocytogenes. The samples were subjected to vacuum packaging (VP) or MAP with high concentrations (99.5 to 100%) of CO2. Pathogens were enumerated periodically during storage at 4 and 10°C. Storage of pork chops at 4°C slowed the growth of Salmonella Typhimurium, and there was little difference in pathogen numbers between VP and MAP samples. L. monocytogenes growth on ham slices at 4°C was inhibited for up to 28 days by all of the treatments, but after 28 days, the VP-PLSD treatment had a greater inhibitory effect than did the other treatments. At 10°C, the PLSD and MAP treatments each effectively inhibited the growth of the pathogens on pork chops and ham slices when compared with controls (VP). However, the results obtained with MAP plus PLSD at 10°C were not different from those obtained with either MAP or PLSD alone. Therefore, the hypothesis was not supported; the high-CO2 atmosphere of the MAP did not increase the effectiveness of PLSD for inhibition of pathogens.

Influence of Antimicrobial Compounds and Modified Atmosphere Packaging on Radiation Sensitivity of Listeria monocytogenes Present in Ready-to-Use Carrots (Daucus carota)

2006 ◽  
Vol 69 (1) ◽  
pp. 221-227 ◽  
Author(s):  
S. CAILLET ◽  
M. MILLETTE ◽  
M. TURGIS ◽  
S. SALMIERI ◽  
M. LACROIX
Keyword(s):  
Listeria Monocytogenes ◽  
Daucus Carota ◽  
Active Compound ◽  
Modified Atmosphere Packaging ◽  
Fold Increase ◽  
Radiation Sensitivity ◽  
Modified Atmosphere ◽  
Antimicrobial Compounds ◽  
Similar Increase ◽  
Active Compounds

Radiosensitization of Listeria monocytogenes was determined in the presence of trans-cinnamaldehyde, Spanish oregano, winter savory, and Chinese cinnamon on peeled minicarrots packed under air or under a modified atmosphere (60% O2, 30% CO2, and 10% N2). Samples were inoculated with L. monocytogenes HPB 2812 serovar 1/2a (106 CFU/g) and were coated separately with each active compound (0.5%, wt/wt) before being packaged under air or the modified atmosphere and irradiated at doses from 0.07 to 2.4 kGy. Results indicated that the bacterium was more resistant to irradiation under air in the absence of active compound. The dose required to reduce L. monocytogenes population by 1 log CFU (D10) was 0.36 kGy for samples packed under air and 0.17 kGy for those packed under the modified atmosphere. The active compounds evaluated in this study had an effect on the radiation sensitivity of L. monocytogenes on carrots. The most efficient compound was trans-cinnamaldehyde, where a mean 3.8-fold increase in relative radiation sensitivity was observed for both atmospheres compared with the control. The addition of winter savory and Chinese cinnamon produced a similar increase in relative radiation sensitivity but only when samples where packed under modified atmosphere conditions.

Growth of Listeria monocytogenes and Pseudomonas fragi on Cooked Pork in a Modified Atmosphere Packaging/Nisin Combination System

1994 ◽  
Vol 57 (6) ◽  
pp. 479-485 ◽  
Author(s):  
TONY J. FANG ◽  
LO-WEI LIN
Keyword(s):  
Listeria Monocytogenes ◽  
Modified Atmosphere Packaging ◽  
Inhibitory Effect ◽  
Modified Atmosphere ◽  
Safety Index ◽  
Pseudomonas Fragi ◽  
Relative Safety ◽  
Combination System ◽  
Carbon Dioxide Co2 ◽  
Air Control

The influence of carbon dioxide (CO2) atmospheres combined with various nisin concentrations on the growth of Listeria monocytogenes Scott A and Pseudomonas fragi CCRC 10939 on cooked tenderloin pork stored at 4 and 20°C was investigated. Atmospheres employed were 100 and 80% CO2; and an air control. Pork tenderloins were steamed, cooled, and coinoculated with L. monocytogenes and P. fragi. Headspace composition of sample bags determined throughout storage at 4°C indicated that greater growth occurred on air-stored tenderloins than on modified atmosphere-stored (MA-stored) samples. Colony counts of P. fragi were appreciably reduced by the MA storage; however, the same pattern was not found in L. monocytogenes. Although P. fragi on cooked tenderloin was unaffected by nisin, the growth of L. monocytogenes was prevented when samples were treated with 1 × 104 nisin IU/ml. In addition, the modified atmosphere packaging (MAP) (100% CO2, 80% CO2 + 20% air)/nisin (103, 104 IU/ml) combination system used in this study decreased growth of both organisms, and this inhibitory effect for MAP/nisin combination system was more pronounced at 4°C than at 20°C. The concept of a Safety Index, which compares numbers of spoilage and pathogenic organisms, was also used as a measure of the relative safety of this MAP/nisin combination system.

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