scholarly journals Evaluation of Three Swabbing Devices for Detection of Listeria monocytogenes on Different Types of Food Contact Surfaces

2014 ◽  
Vol 11 (1) ◽  
pp. 804-814 ◽  
Author(s):  
Evy Lahou ◽  
Mieke Uyttendaele
Keyword(s):  
Listeria Monocytogenes ◽  
Food Contact ◽  
Food Contact Surfaces ◽  
Different Types ◽  
Contact Surfaces

Establishment of incubation conditions to optimize the in vitro formation of mature Listeria monocytogenes biofilms on food-contact surfaces

Food Control ◽  
2018 ◽  
Vol 92 ◽  
pp. 240-248 ◽  
Author(s):  
C. Ripolles-Avila ◽  
A.S. Hascoët ◽  
A.E. Guerrero-Navarro ◽  
J.J. Rodríguez-Jerez
Keyword(s):  
Listeria Monocytogenes ◽  
Food Contact ◽  
Food Contact Surfaces ◽  
Contact Surfaces

Simple, Accurate Method for Evaluating the Amount of Fat and Protein Residue on a Food Contact Surface1,2

1984 ◽  
Vol 47 (10) ◽  
pp. 762-764
Author(s):  
H. E. HUFF ◽  
M. E. ANDERSON ◽  
R. T. MARSHALL
Keyword(s):  
Stainless Steel ◽  
Recovery Rate ◽  
Gravimetric Method ◽  
Accurate Method ◽  
Food Grade ◽  
Food Contact ◽  
Food Contact Surfaces ◽  
Different Types ◽  
Contact Surfaces ◽  
Pork Fat

The objective of this research was to evaluate a method for quantitatively removing pork fat and blood plasma from different food contact surfaces - glass, stainless steel, plastic and food grade belting. Two studies were conducted. In the first study, a mass balance procedure was used to determine whether the developed method could remove virtually all the fat or protein placed on stainless steel and glass. In the second study, a gravimetric method was used to verify that the amount of fat on test strips could be harvested and quantified as residue. A recovery rate of from 98% or 100% was achieved for the different types of food contact surfaces.

Relationship between Listeria monocytogenes and Listeria spp. in Seafood Processing Plants

2013 ◽  
Vol 76 (7) ◽  
pp. 1279-1282 ◽  
Author(s):  
WALID Q. ALALI ◽  
DONALD W. SCHAFFNER
Keyword(s):  
Listeria Monocytogenes ◽  
Raw Materials ◽  
Food Products ◽  
Published Data ◽  
Food Contact ◽  
Food Contact Surfaces ◽  
Processing Plants ◽  
Contact Surfaces ◽  
Seafood Processing ◽  
The Relationship

The objective of this study was to evaluate the relationship between prevalence of Listeria monocytogenes as an outcome and Listeria spp. as an explanatory variable by food products, food contact surfaces, and nonfood contact surfaces in seafood processing plants by using peer-reviewed published data. Nine sets of prevalence data of L. monocytogenes and Listeria spp. were collected from published studies and used for the analyses. Based on our analysis, the relationship between L. monocytogenes prevalence and Listeria spp. prevalence in food products (incoming raw materials and finish products) was significant (P = 0.04) with (low) R2 = 0.36. Furthermore, Listeria spp. were not a good indicator for L. monocytogenes when testing food contact surfaces (R2= 0.10). Listeria spp. were a good indicator for L. monocytogenes only on nonfood contact surfaces (R2= 0.90). On the other hand, the presence of Listeria spp. on food contact surfaces (R2= 0.002) and nonfood contact surfaces (R2= 0.03) was not a good indicator for L. monocytogenes presence in food products. In general, prevalence of Listeria spp. does not seem to be a good indicator for L. monocytogenes prevalence in seafood processing plants.

Comparison of Sampling Procedures for Recovery of Listeria monocytogenes from Stainless Steel Food Contact Surfaces

2012 ◽  
Vol 75 (6) ◽  
pp. 1077-1082 ◽  
Author(s):  
DIEGO GÓMEZ ◽  
AGUSTÍN ARIÑO ◽  
JUAN J. CARRAMIÑANA ◽  
CARMINA ROTA ◽  
JAVIER YANGÜELA
Keyword(s):  
Stainless Steel ◽  
Listeria Monocytogenes ◽  
Cost Effective ◽  
Sampling Procedure ◽  
Human Origin ◽  
Sampling Device ◽  
Food Contact ◽  
Food Contact Surfaces ◽  
Contact Surfaces ◽  
Sampling Procedures

A number of techniques exist for microbiological sampling of food processing environments in food industries. In the present study the efficacies of nine sampling procedures for the recovery of Listeria monocytogenes from food contact surfaces, including a new sampling device consisting of a miniroller, were evaluated and compared. A stainless steel table was inoculated with L. monocytogenes strain 935 (serovar 4b, human origin) and L. monocytogenes strain 437/07 (serovar 1/2b, food origin), at 105 CFU/100 cm2. L. monocytogenes strain 935 was best recovered with the minirollers (recovery of up to 6.27%), while poor recoveries (<0.30%) were obtained with the towel (one-ply composite tissue), alginate swab, metallic swab, and Petrifilm methods. In the case of L. monocytogenes strain 437/07 the replicate organism detection and counting (RODAC) ALOA contact plates yielded the best recoveries (4.15%), followed by the minirollers (up to 1.52%). Overall, recovery percentages with the minirollers were higher with stomacher homogenization than with Vibromatic agitation. The recovery percentages obtained for the Listeria strain of human origin were higher than those obtained with the food strain for all sampling procedures except Petrifilm and RODAC ALOA. With the miniroller device coated with wool fiber, the recovery of L. monocytogenes can be improved from 2 to 17 times over recoveries obtained with the sponge and cotton swab. This is the first report of a miniroller device for microbiological sampling in the available literature. The novel sampling procedure is convenient to apply on surfaces, is cost-effective, and results in better recovery of L. monocytogenes than do the conventional methods.

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