Listeria monocytogenes and Other Listeria spp. in Meat and Meat Products A Review

1990 ◽  
Vol 53 (1) ◽  
pp. 81-91 ◽  
Author(s):  
JENNIFER L. JOHNSON ◽  
MICHAEL P. DOYLE ◽  
ROBERT G. CASSENS
Keyword(s):  
Public Health ◽  
Listeria Monocytogenes ◽  
Human Disease ◽  
Meat Products ◽  
Meat Processing ◽  
Widespread Distribution ◽  
Domestic Livestock ◽  
Survival And Growth ◽  
Meat Preservation ◽  
Raw Meats

Long known as an animal pathogen, Listeria monocytogenes has recently been recognized as a important foodborne agent in human disease. The widespread distribution of L. monocytogenes and other Listeria spp. in nature and an association with domestic livestock makes the occasional presence of these bacteria on raw meats almost unavoidable. Contamination of ready-to-eat meat products with L. monocytogenes poses a special threat to public health because of the organism's ability to grow at refrigeration temperatures and its pathogenicity within certain segments of the population. This paper reviews the prevalence of Listeria spp. in meat and meat products, analyzes the potential for survival and growth of listeriae on fresh meats and during meat processing, and addresses the effect of various meat preservation parameters on L. monocytogenes.

scholarly journals Understanding Traditional Meat Processing Knowledge among the Borana Pastoralist of Northern Kenya

2018 ◽  
Vol 7 (4) ◽  
pp. 30 ◽  
Author(s):  
Buke Dabasso ◽  
Hassan Roba ◽  
Anselimo Makokha ◽  
Arnold Onyango ◽  
Julius Maina
Keyword(s):  
Meat Products ◽  
Meat Production ◽  
Meat Processing ◽  
Northern Kenya ◽  
Future Consumption ◽  
Meat Preservation ◽  
Almost All ◽  
Shelf Stable ◽  
And Storage ◽  
Depth Interviews

Indigenous knowledge on food preparation is an activity practised in almost all agricultural production system. Amongst the Borana pastoralist of Northern Kenya, milk and meat production are the cornerstone of livelihood, and more often abundance occurs without possibility of immediate consumption, triggering the need to preserve surplus for future consumption. The objective of this paper is to document and understand traditional meat preparation knowledge amongst Borana pastoralist’s women of Northern Kenya.The method of collecting information included in-depth interviews and participant observations to document meat preparation skills and knowledge of Borana people as appertains to traditional food ways. It was observed that methods of traditional meat processing and preparation included different forms of drying, use of heat and storage in fat. Fourteen traditional meat products and seven preservation techniques were documented. Drying and deep frying were the major form of meat preservation. Women skillfully put a lot of effort in all stages of meat preparation to produce an end product that is not only shelf stable but traditional products that are appreciated and nutritious. It was observed that only four of the products are currently in use, an indication of steady decline in meat handling knowledge and preparation. 

scholarly journals Occurrence of Listeria monocytogenes in Ready-to-Eat Meat Products and Meat Processing Plants in Spain

Foods ◽  
2015 ◽  
Vol 4 (4) ◽  
pp. 271-282 ◽  
Author(s):  
Diego Gómez ◽  
Laura Iguácel ◽  
Mª Rota ◽  
Juan Carramiñana ◽  
Agustín Ariño ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Meat Products ◽  
Meat Processing ◽  
Processing Plants

Hygiene and Safety in the Meat Processing Environment from Butcher Shops: Microbiological Contamination and Listeria monocytogenes

2016 ◽  
Vol 79 (4) ◽  
pp. 628-634 ◽  
Author(s):  
DANILO AUGUSTO LOPES da SILVA ◽  
MARIANE REZENDE DIAS ◽  
MARCUS VINÍCIUS COUTINHO COSSI ◽  
NATÁLIA PARMA AUGUSTO de CASTILHO ◽  
ANDERSON CARLOS CAMARGO ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Meat Products ◽  
Meat Production ◽  
Human Consumption ◽  
Quality And Safety ◽  
Meat Processing ◽  
Microbiological Contamination ◽  
Production Chain ◽  
Indicator Microorganisms ◽  
Butcher Shops

ABSTRACT The quality and safety of meat products can be estimated by assessing their contamination by hygiene indicator microorganisms and some foodborne pathogens, with Listeria monocytogenes as a major concern. To identify the main sources of microbiological contamination in the processing environment of three butcher shops, surface samples were obtained from the hands of employees, tables, knives, inside butcher displays, grinders, and meat tenderizers (24 samples per point). All samples were subjected to enumeration of hygiene indicator microorganisms and detection of L. monocytogenes, and the obtained isolates were characterized by their serogroups and virulence genes. The results demonstrated the absence of relevant differences in the levels of microbiological contamination among butcher shops; samples with counts higher than reference values indicated inefficiency in adopted hygiene procedures. A total of 87 samples were positive for Listeria spp. (60.4%): 22 from tables, 20 from grinders, 16 from knives, 13 from hands, 9 from meat tenderizers, and 7 from butcher shop displays. Thirty-one samples (21.5%) were positive for L. monocytogenes, indicating the presence of the pathogen in meat processing environments. Seventy-four L. monocytogenes isolates were identified, with 52 from serogroups 1/2c or 3c and 22 from serogroups 4b, 4d, 4a, or 4c. All 74 isolates were positive for hlyA, iap, plcA, actA, and internalins (inlA, inlB, inlC, and inlJ). The establishment of appropriate procedures to reduce microbial counts and control the spread of L. monocytogenes in the final steps of the meat production chain is of utmost importance, with obvious effects on the quality and safety of meat products for human consumption.

Control of Listeria monocytogenes with Combined Antimicrobials on Beef Franks Stored at 4°C

2004 ◽  
Vol 67 (10) ◽  
pp. 2296-2301 ◽  
Author(s):  
MILAGROS UHART ◽  
SADHANA RAVISHANKAR ◽  
NICOLE D. MAKS
Keyword(s):  
Listeria Monocytogenes ◽  
Safety Issue ◽  
Meat Products ◽  
Sodium Lactate ◽  
Meat Processing ◽  
Bacterial Strains ◽  
Log Reduction ◽  
Sodium Diacetate ◽  
Packaged Beef ◽  
Antimicrobial Treatments

Contamination of ready-to-eat meat products such as beef franks with Listeria monocytogenes has become a major concern for the meat processing industry and an important food safety issue. The objective of this study was to determine the effectiveness of combinations of antimicrobials as aqueous dipping solutions to control L. monocytogenes on vacuum-packaged beef franks stored at 4°C for 3 weeks. Commercial beef franks were dipped for 5 min in three antimicrobial solutions: pediocin (6,000 AU), 3% sodium diacetate and 6% sodium lactate combined, and a combination of the three antimicrobials. Samples were then inoculated with 107 CFU/g of either four L. monocytogenes strains individually or a cocktail of the four strains, vacuum packaged, and stored at 4°C for 3 weeks. Sampling was carried out at day 0 and after 2 and 3 weeks of storage. Individual strains, as well as the cocktail, exhibited different responses to the antimicrobial treatments. After 2 and 3 weeks of storage at 4°C, pediocin-treated beef franks showed a less than 1-log reduction for all bacterial strains. Samples treated with the sodium diacetate–sodium lactate combination showed about a 1-log reduction after 2 weeks of storage for all strains and between a 1- and 2-log reduction after 3 weeks of storage, depending on the bacterial strain. When the three antimicrobials were combined, reductions ranged between 1 and 1.5 log units and 1.5 to 2.5 log units after 2 and 3 weeks of storage, respectively, at 4°C. These results indicate that the use of combined antimicrobial solutions for dipping treatments is more effective at inhibiting L. monocytogenes than treatments using antimicrobials such as pediocin separately.

scholarly journals Distribution of serotypes of Listeria monocytogenes in chicken meats in Turkey

2020 ◽  
Vol 70 (4) ◽  
pp. 1859
Author(s):  
S. SAHIN ◽  
R. KALIN ◽  
MN MOGULKOC
Keyword(s):  
Public Health ◽  
Listeria Monocytogenes ◽  
Large Scale ◽  
Meat Products ◽  
Health Problems ◽  
Chicken Meat ◽  
Serotype Distribution ◽  
Food Borne ◽  
Serotype 1 ◽  
Food Borne Infections

Listeria monocytogenes is one of the important causes of food-borne infections. This study was conducted to determine the presence of L. monocytogenes and its serotype distribution in a total of 400 packaged chicken meat products (drumstick, breast, wing, and whole chicken) from different national companies. L. monocytogenes contamination was detected in 26.5% (106 in 400) of all samples when the products considered, drumsticks, breasts, wings, and whole chickens showed 47%, 15%, 35, and 9% positivity respectively. Four important serotypes of L. monocytogenes in human listeriosis (1/2a, 1/2b, 1/2c and 4b) were identified, and serotype 1/2a (94.3%) was determined as predominant in packaged chicken meats. The present study revealed that L. monocytogenes 1/2a serotype is prevalent in chicken meats and this may cause public health problems in Turkey. Further studies in poultry meats should be conducted on a large scale such as regional or national big markets to determine the presence of the pathogen and its dominant serotypes.

Prevalence and characteristics of Listeria monocytogenes in meat, meat products, food handlers and the environment of the meat processing and the retail facilities of a company in Northern Greece

2021 ◽  
Author(s):  
George Papatzimos ◽  
Charalampos Kotzamanidis ◽  
Maria Kyritsi ◽  
Eleni Malissiova ◽  
Vangelis Economou ◽  
...  
Keyword(s):  
Listeria Monocytogenes ◽  
Meat Products ◽  
Meat Processing ◽  
Food Handlers ◽  
Northern Greece ◽  
A Company

Contamination Patterns of Listeria monocytogenes in Cold-Smoked Pork Processing

2010 ◽  
Vol 73 (11) ◽  
pp. 2103-2109 ◽  
Author(s):  
AIVARS BĒRZIŅŠ ◽  
SANNA HELLSTRÖM ◽  
INDULIS SILIŅŠ ◽  
HANNU KORKEALA
Keyword(s):  
Listeria Monocytogenes ◽  
Environmental Samples ◽  
Meat Products ◽  
Pulsed Field Gel Electrophoresis ◽  
Processing Plant ◽  
Environmental Sampling ◽  
Meat Processing ◽  
Pork Products ◽  
Plant Environment ◽  
Pork Samples

Contamination patterns of Listeria monocytogenes were studied in a cold-smoked pork processing plant to identify the sources and possible reasons for the contamination. Environmental sampling combined with pulsed-field gel electrophoresis (PFGE) subtyping and serotyping were applied to investigate the genetic diversity of L. monocytogenes in the plant environment and ready-to-eat (RTE) cold-smoked pork products. A total of 183 samples were collected for contamination analyses, including samples of the product at different stages during manufacture (n = 136) and environmental samples (n = 47) in 2009. L. monocytogenes isolates, previously recovered from 73 RTE cold-smoked pork samples and collected from the same meat processing plant in 2004, were included in this study. The brining machine and personnel working with brining procedures were the most contaminated places with L. monocytogenes. The overall prevalence of L. monocytogenes in raw pork (18%) increased to 60% after the brining injections. The brining machine harbored six different PFGE types belonging to serotypes 1/2a, 1/2c, 4b, and 4d, which were found on the feeding teeth, smooth surfaces, and spaces of the machine, thus potentially facilitating dissemination of L. monocytogenes contamination. Two PFGE types (2 and 8) belonging to serotypes 1/2a and 1/2c were recovered from RTE cold-smoked pork collected in 2004, and from surfaces of the brining machine sampled in 2009, and may indicate the presence of persistent L. monocytogenes strains in the plant. Due to poor hygiene design, removal of the brining machine from the production of cold-smoked meat products should be considered to reduce L. monocytogenes contamination in the finished products.

Factors Influencing the Survival and Growth of Listeria monocytogenes on the Surface of Canadian Retail Wieners

1994 ◽  
Vol 57 (5) ◽  
pp. 387-392 ◽  
Author(s):  
ROBIN C. MCKELLAR ◽  
ROBERT MOIR ◽  
MILOSLAV KALAB
Keyword(s):  
Listeria Monocytogenes ◽  
Storage Temperature ◽  
Health Hazard ◽  
Meat Products ◽  
Growth Conditions ◽  
Stepwise Multiple Regression ◽  
Dense Layer ◽  
Potential Hazard ◽  
Initial Ph ◽  
Survival And Growth

A study of survival and growth of Listeria monocytogenes on Canadian retail wieners was undertaken to assess the potential hazard of this product. All-beef, poultry or beef/pork wieners from a total of six processing plants were surface-inoculated with a three-strain cocktail of L. monocytogenes, and stored under vacuum at 5°C for up to 28 days. Of a total of 61 samples tested, 40 (65.6%) supported growth of the pathogen. A model was derived for 35 samples with stepwise multiple regression analysis, which used initial pH (pH0), initial lactic acid bacteria counts (LAB0), and LAB after 14 days (LAB14) to explain 48.1% of the variation in the L monocytogenes counts after 14 days. The observed times to 1-log increase in counts for 25 samples in which growth occurred were compared to times predicted by the U. S. Dept. of Agriculture (USDA) Pathogen Modelling Program. The latter model, based on storage temperature, and initial pH, nitrite and salt concentrations, explained only 12.4% of the variation in the observed times. Scanning electron microscopy showed that the wiener surface was composed of a dense layer of coagulated protein. This may alter the ability of L. monocytogenes to develop relative to growth conditions in the meat formulation. These results suggest that retail wieners may support growth of L monocytogenes, which could present a health hazard to target groups of consumers if subjected to post-processing contamination. They also suggest that further work is needed to derive adequate models to allow an accurate prediction of the growth of L. monocytogenes on ready-to-eat meat products.

Prevalence and Genetic Diversity of Listeria monocytogenes in Vacuum-Packaged Ready-to-Eat Meat Products at Retail Markets in Latvia

2009 ◽  
Vol 72 (6) ◽  
pp. 1283-1287 ◽  
Author(s):  
AIVARS BĒRZIŅŠ ◽  
MARGARITA TERENTJEVA ◽  
HANNU KORKEALA
Keyword(s):  
Listeria Monocytogenes ◽  
Shelf Life ◽  
Meat Products ◽  
Processing Plant ◽  
Meat Processing ◽  
Pork Products ◽  
Beef Products ◽  
Processing Plants ◽  
Serotype 1 ◽  
Packaged Beef

Nine groups of different retail ready-to-eat vacuum-packaged meat products from 10 Baltic meat processing plants were analyzed for presence and numbers of Listeria monocytogenes at the end of shelf life. A total of 38 (18%) of 211 samples tested positive for L. monocytogenes serotype 1/2a (88%) or 1/2c (12%). The prevalence of L. monocytogenes in cold-smoked, sliced, vacuum-packaged beef and pork products (42%) was significantly higher than in cooked, sliced, vacuum-packaged meat products (0.8%) (P < 0.001). Enumeration of L. monocytogenes showed that 84% of the positive samples contained <100 CFU/g upon expiry of product shelf life. The numbers of L. monocytogenes exceeded 100 CFU/g only in cold-smoked, sliced, vacuum-packaged beef products. Identical pulsed-field gel electrophoresis types were recovered from different production lots of cold-smoked vacuum-packaged beef and pork products produced by the same meat processing plant, demonstrating L. monocytogenes contamination as a recurrent problem within one meat processing plant.

scholarly journals MLVA subtyping of Listeria monocytogenes isolates from meat products and meat processing plants

2018 ◽  
Vol 106 ◽  
pp. 225-232 ◽  
Author(s):  
Belén Martín ◽  
Sara Bover-Cid ◽  
Teresa Aymerich
Keyword(s):  
Listeria Monocytogenes ◽  
Meat Products ◽  
Meat Processing ◽  
Processing Plants
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