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Diriba K, Awulachew E, Diribsa K. The prevalence of Listeria species in different food items of animal and plant origin in Ethiopia: a systematic review and meta-analysis. Eur J Med Res 2021; 26:60. [PMID: 34167579 PMCID: PMC8223351 DOI: 10.1186/s40001-021-00532-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2020] [Accepted: 06/14/2021] [Indexed: 11/30/2022] Open
Abstract
Background Listeriosis is one of the important emerging zoonotic disease affecting human health following the consumption of contaminated food of animal origin. It results in serious clinical complications in humans with a high case facility rate. Therefore, this systematic review and meta-analysis aimed to estimate the pooled prevalence of Listeria species in Ethiopia. Methods A systematic search was conducted on PubMed, Web of Science, EMBASE, Google Scholar and the Cochrane Library. All identified observational studies reporting the prevalence of Listeria species in different food items of animal and plant origin in Ethiopia were included. Three authors independently extracted data and analyzed them using STATA Version 13 statistical software. A random effects model was computed to estimate the pooled prevalence of Listeria species in Ethiopia. Results After reviewing 122 studies, five studies fulfilled the inclusion criteria were included in the meta-analysis. The findings from the five studies revealed that the pooled prevalence of Listeria species in different food items of animal and plant origin in Ethiopia was 27% (95% CI 25, 29). The highest prevalence of Listeria species was reported in beef meat followed by ice cream with prevalence rates of 62% (95% CI 50, 75) and 43% (95% CI 33, 53), respectively. Conclusion The presence of Listeria species in different food items of animal and plant origin in Ethiopia is an indicator of the presence of public health hazards to the consumer, particularly to the high-risk groups. Hence, awareness creation on food safety and implementation of regulations is strongly recommended.
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Affiliation(s)
- Kuma Diriba
- Department of Medical Laboratory Sciences, Health Science and Medical College, Dilla University, Dilla, Ethiopia.
| | - Ephrem Awulachew
- Department of Medical Laboratory Sciences, Health Science and Medical College, Dilla University, Dilla, Ethiopia
| | - Kuma Diribsa
- Department of Biology, Educational College, Dilla University, Dilla, Ethiopia
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2
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Lin CH, Adams PJ, Huang JF, Sun YF, Lin JH, Robertson ID. Contamination of chicken carcasses and the abattoir environment with Listeria monocytogenes in Taiwan. Br Poult Sci 2021; 62:701-709. [PMID: 33970711 DOI: 10.1080/00071668.2021.1927984] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
1. The following study provides the first data on the detection and types of Listeria monocytogenes isolated from broiler chickens during processing and from six Taiwanese abattoir environments.2. Listeria monocytogenes was not detected in any cloacal (n = 120) or environmental (n = 256) samples collected before and during processing, indicating that faecal material and the environment of abattoirs were not important sources of L. monocytogenes for poultry carcases. However, 28 of 246 (11.4%; 95% CI: 7.7-16.0) rinse samples collected from carcases post-evisceration from three abattoirs were positive for L. monocytogenes.3. The only serotypes detected were 1/2a (82.1%; 95% CI: 63.1-93.9) and 1/2b (14.3%; 95% CI: 4.0-32.7), with 3.6% (95% CI: 0.1-18.3) non-typable isolates.4. Characterisation by Pulsed Field Gel Electrophoresis (PFGE) identified five PFGE types, confirming cross-contamination with L. monocytogenes during evisceration, chilling and post-chilling.5. These findings highlight the potential for cross-contamination to occur through direct contact between carcases, especially whilst in chilling tanks.
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Affiliation(s)
- C-H Lin
- School of Veterinary Medicine, Murdoch University, Murdoch, Australia.,Bureau of Animal and Plant Health Inspection and Quarantine, Council of Agriculture, Taipei City, Taiwan
| | - P J Adams
- School of Veterinary Medicine, Murdoch University, Murdoch, Australia.,Department of Primary Industries and Regional Development, South Perth, Australia
| | - J-F Huang
- Animal Technology Research Centre, Agricultural Technology Research Institute, Miaoli County, Taiwan
| | - Y-F Sun
- Animal Technology Research Centre, Agricultural Technology Research Institute, Miaoli County, Taiwan
| | - J-H Lin
- Animal Technology Research Centre, Agricultural Technology Research Institute, Miaoli County, Taiwan
| | - I D Robertson
- School of Veterinary Medicine, Murdoch University, Murdoch, Australia
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3
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Koyama K, Hiura S, Abe H, Koseki S. Application of growth rate from kinetic model to calculate stochastic growth of a bacteria population at low contamination level. J Theor Biol 2021; 525:110758. [PMID: 33984354 DOI: 10.1016/j.jtbi.2021.110758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 04/27/2021] [Accepted: 05/01/2021] [Indexed: 11/25/2022]
Abstract
Traditional predictive microbiology is not suited for cell growth predictions for low-level contamination, where individual cell heterogeneity becomes apparent. Accordingly, we simulated a stochastic birth process of bacteria population using kinetic parameters. We predicted the variation in behavior of Salmonella enterica serovar Typhimurium cells at low inoculum density. The modeled cells were grown in tryptic soy broth at 25 °C. Kinetic growth parameters were first determined empirically for an initial cell number of 104 cells. Monte Carlo simulation based on the growth kinetics and Poisson distribution for different initial cell numbers predicted the results of 50 replicate growth experiments with the initial cell number of 1, 10, and 64 cells. Indeed, measured behavior of 85% cells fell within the 95% prediction area of the simulation. The calculations link the kinetic and stochastic birth process with Poisson distribution. The developed model can be used to calculate the probability distribution of population size for exposure assessment and for the evaluation of a probability that a pathogen would exceed critical contamination level during food storage.
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Affiliation(s)
- Kento Koyama
- Graduate School of Agricultural Science, Hokkaido University, Kita-9, Nishi-9, Kita-ku, Sapporo 060-8589, Japan.
| | - Satoko Hiura
- Graduate School of Agricultural Science, Hokkaido University, Kita-9, Nishi-9, Kita-ku, Sapporo 060-8589, Japan.
| | - Hiroki Abe
- Graduate School of Agricultural Science, Hokkaido University, Kita-9, Nishi-9, Kita-ku, Sapporo 060-8589, Japan.
| | - Shige Koseki
- Graduate School of Agricultural Science, Hokkaido University, Kita-9, Nishi-9, Kita-ku, Sapporo 060-8589, Japan.
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4
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Meloni D, Consolati SG, Mazza R, Marceddu M, Mudadu AG, Piras F, Mazzette R. Occurrence of food-borne pathogens and process hygiene indicators in three Italian poultry slaughterhouses. J Food Saf 2017. [DOI: 10.1111/jfs.12349] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Domenico Meloni
- Department of Veterinary Medicine; University of Sassari, Via Vienna 2; Sassari 07100 Italy
| | | | - Roberta Mazza
- Department of Veterinary Medicine; University of Sassari, Via Vienna 2; Sassari 07100 Italy
| | - Marta Marceddu
- Department of Veterinary Medicine; University of Sassari, Via Vienna 2; Sassari 07100 Italy
| | | | - Francesca Piras
- Department of Veterinary Medicine; University of Sassari, Via Vienna 2; Sassari 07100 Italy
| | - Rina Mazzette
- Department of Veterinary Medicine; University of Sassari, Via Vienna 2; Sassari 07100 Italy
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Lansini V, Maia DSV, da Fontoura Prates D, de Lima AS, da Silva WP. Antibacterial activity of Timsen ® ( n-alkyl dimethyl benzyl ammonium chloride-40%) in scalding and precooling water in poultry slaughterhouses. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2017; 54:2607-2612. [PMID: 28740319 PMCID: PMC5502014 DOI: 10.1007/s13197-017-2660-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/11/2017] [Accepted: 04/26/2017] [Indexed: 11/29/2022]
Abstract
The objective of this study was to evaluate the efficacy of a product based on n-alkyl dimethyl benzyl ammonium chloride-40%, marketed as Timsen®, during scalding and precooling of poultry carcasses in slaughterhouses. To this end, three poultry slaughterhouses (A, B and C) were evaluated. The product was added (200 ppm) to the scalding (58 °C) and precooling water (4 °C), and microbiological analyses were performed of the water and the poultry carcasses before and after Timsen® addition. The product controlled the multiplication of aerobic mesophilic microorganisms, both in the scalding as in the precooling water. In a comparison of carcasses soaked in Timsen®-treated scalding and precooling water with carcasses soaked in untreated water, the count of aerobic mesophilic microorganisms in the later was higher and thermotolerant coliform was not detected in samples of carcasses soaked in Timsen®-treated water. When the scalding and precooling water was not treated with the product, Listeria spp. was isolated from poultry carcasses of two slaughterhouses (A and C), while these microorganisms were not detected when Timsen® was applied. The use of Timsen® in the scalding and precooling water enhanced the safety and control microbial contamination of poultry carcasses.
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Affiliation(s)
- Valmor Lansini
- Department of Agroindustrial Science and Technology, Universidade Federal de Pelotas, Pelotas, Brazil
| | | | - Denise da Fontoura Prates
- Department of Agroindustrial Science and Technology, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Andréia Saldanha de Lima
- Department of Agroindustrial Science and Technology, Universidade Federal de Pelotas, Pelotas, Brazil
| | - Wladimir Padilha da Silva
- Department of Agroindustrial Science and Technology, Universidade Federal de Pelotas, Pelotas, Brazil
- Unit of Biotechnology, Center of Technological Development, Universidade Federal de Pelotas, Pelotas, Brazil
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6
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Ding T, Liao XY, Dong QL, Xuan XT, Chen SG, Ye XQ, Liu DH. Predictive modeling of microbial single cells: A review. Crit Rev Food Sci Nutr 2017; 58:711-725. [DOI: 10.1080/10408398.2016.1217193] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Tian Ding
- Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xin-Yu Liao
- Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang, China
| | - Qing-Li Dong
- Institute of Food Quality and Safety, University of Shanghai for Science and Technology, Shanghai, China
| | - Xiao-Ting Xuan
- Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang, China
| | - Shi-Guo Chen
- Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang, China
| | - Xing-Qian Ye
- Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang, China
| | - Dong-Hong Liu
- Department of Food Science and Nutrition, Zhejiang Key Laboratory for Agro-Food Processing, Zhejiang University, Hangzhou, Zhejiang, China
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7
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Estimation of growth parameters of Listeria monocytogenes after sublethal heat and slightly acidic electrolyzed water (SAEW) treatment. Food Control 2017. [DOI: 10.1016/j.foodcont.2016.06.018] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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8
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Gonzalez-Fandos E, Herrera B. Efficacy of Acetic Acid against Listeria monocytogenes Attached to Poultry Skin during Refrigerated Storage. Foods 2014; 3:527-540. [PMID: 28234335 PMCID: PMC5302253 DOI: 10.3390/foods3030527] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 07/07/2014] [Accepted: 08/06/2014] [Indexed: 11/23/2022] Open
Abstract
This work evaluates the effect of acetic acid dipping on the growth of L. monocytogenes on poultry legs stored at 4 °C for eight days. Fresh inoculated chicken legs were dipped into either a 1% or 2% acetic acid solution (v/v) or distilled water (control). Changes in mesophiles, psychrotrophs, Enterobacteriaceae counts and sensorial characteristics (odor, color, texture and overall appearance) were also evaluated. The shelf life of the samples washed with acetic acid was extended by at least two days over the control samples washed with distilled water. L. monocytogenes counts before decontamination were 5.57 log UFC/g, and after treatment with 2% acetic acid (Day 0), L. monocytogenes counts were 4.47 log UFC/g. Legs washed with 2% acetic acid showed a significant (p < 0.05) inhibitory effect on L. monocytogenes compared to control legs, with a decrease of about 1.31 log units after eight days of storage. Sensory quality was not adversely affected by acetic acid. This study demonstrates that while acetic acid did reduce populations of L. monocytogenes on meat, it did not completely inactivate the pathogen. The application of acetic acid may be used as an additional hurdle contributing to extend the shelf life of raw poultry and reducing populations of L. monocytogenes.
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Affiliation(s)
- Elena Gonzalez-Fandos
- Food Technology Department, CIVA Research Center, University of La Rioja, Madre de Dios 51, 26006 Logroño, La Rioja, Spain.
| | - Barbara Herrera
- Food Technology Department, CIVA Research Center, University of La Rioja, Madre de Dios 51, 26006 Logroño, La Rioja, Spain.
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9
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Efficacy of propionic acid against Listeria monocytogenes attached to poultry skin during refrigerated storage. Food Control 2013. [DOI: 10.1016/j.foodcont.2013.05.034] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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10
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González-Fandos E, Herrera B. Efficacy of malic acid against Listeria monocytogenes attached to poultry skin during refrigerated storage. Poult Sci 2013; 92:1936-41. [DOI: 10.3382/ps.2012-02968] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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11
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Fallah AA, Saei-Dehkordi SS, Rahnama M, Tahmasby H, Mahzounieh M. Prevalence and antimicrobial resistance patterns of Listeria species isolated from poultry products marketed in Iran. Food Control 2012. [DOI: 10.1016/j.foodcont.2012.05.014] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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12
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Sakaridis I, Soultos N, Dovas C, Papavergou E, Ambrosiadis I, Koidis P. Lactic acid bacteria from chicken carcasses with inhibitory activity against Salmonella spp. and Listeria monocytogenes. Anaerobe 2012; 18:62-6. [DOI: 10.1016/j.anaerobe.2011.09.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Revised: 08/29/2011] [Accepted: 09/25/2011] [Indexed: 11/25/2022]
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13
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ZHAO KAI, SUN XIAOFEI, ZHAO XINGHAI, QI BAOMIN, TANG XUEMING. SITE-DIRECTED MUTAGENESIS, ISOLATION AND PURIFICATION OF LISTERIA MONOCYTOGENES LISTERIOLYSIN O AND ITS IMMUNOGENICITY. J Food Saf 2011. [DOI: 10.1111/j.1745-4565.2011.00348.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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14
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Sakaridis I, Soultos N, Iossifidou E, Papa A, Ambrosiadis I, Koidis P. Prevalence and antimicrobial resistance of Listeria monocytogenes isolated in chicken slaughterhouses in Northern Greece. J Food Prot 2011; 74:1017-21. [PMID: 21669084 DOI: 10.4315/0362-028x.jfp-10-545] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study was conducted to determine the prevalence and antimicrobial resistance of Listeria monocytogenes recovered from chicken carcasses in slaughterhouses in Northern Greece. A total of 100 poultry samples (300 carcasses) were examined for Listeria spp. The samples were neck skin taken from four different slaughterhouses in Northern Greece. Forty samples were also taken from the environment of the slaughterhouses. Identification of L. monocytogenes was carried out by PCR and fingerprinting of the isolates by random amplified polymorphic DNA. L. monocytogenes strains isolated from chicken carcasses and from the environment of the slaughterhouses were also examined for antibiotic resistance. Fifty-five isolates of L. monocytogenes were tested for susceptibility to 20 antibiotics using the disk diffusion method. Listeria spp. were present in 99 of the poultry samples tested (99%), and 38 yielded L monocytogenes (38%). L. monocytogenes was also isolated in 80% of samples from the environment of a certain slaughterhouse, while the other slaughterhouses were found to be contaminated only with Listeria spp. All isolates were resistant to nalidixic acid and oxolinic acid, the majority of them to clindamycin, and only a few to tetracycline and oxytetracycline, whereas they were found to be susceptible to all other antimicrobials. The results of this study demonstrate a high prevalence of L. monocytogenes contamination in chicken carcasses, and all isolates were found to be sensitive to the antimicrobials most commonly used to treat human listeriosis.
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Affiliation(s)
- I Sakaridis
- Department of Hygiene and Technology of Foods of Animal Origin, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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15
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Malpass M, Williams A, Jones D, Omed H. Microbiological quality of chicken wings damaged on the farm or in the processing plant. Food Microbiol 2010; 27:521-5. [DOI: 10.1016/j.fm.2009.10.013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2009] [Revised: 10/21/2009] [Accepted: 10/23/2009] [Indexed: 10/20/2022]
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16
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Prevalence and antibiotic susceptibility of Listeria spp. isolated from raw meat and retail foods. Food Control 2010. [DOI: 10.1016/j.foodcont.2009.10.012] [Citation(s) in RCA: 102] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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17
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Berrang ME, Meinersmann RJ, Frank JF, Ladely SR. Colonization of a newly constructed commercial chicken further processing plant with Listeria monocytogenes. J Food Prot 2010; 73:286-91. [PMID: 20132673 DOI: 10.4315/0362-028x-73.2.286] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
This study was undertaken to determine potential sources of Listeria monocytogenes in a newly constructed chicken further processing plant and document the eventual colonization of the facility by this pathogen. To ascertain the colonization status of the plant, floor drains were sampled after a production shift and again after a cleanup shift on roughly a monthly basis for 21 months. Potential sources of L. monocytogenes to the plant included incoming raw meat, incoming fresh air, and personnel. Nearby environment and community samples were also examined. All L. monocytogenes detected were subjected to DNA sequence-based subtyping. L. monocytogenes was not detected in the plant before the commencement of processing operations. Within 4 months, several subtypes of L. monocytogenes were detected in floor drains, both before and after cleaning and sanitizing operations. No L. monocytogenes was detected on filters for incoming air, samples associated with plant employees, or a nearby discount shopping center. One subtype of L. monocytogenes was detected in a natural stream near the plant; however, this subtype was never detected inside the plant. Eight subtypes of L. monocytogenes were detected in raw meat staged for further processing; one of the raw meat subtypes was indistinguishable from a persistent drain subtype recovered after cleaning on eight occasions in four different drains. Poultry further processing plants are likely to become colonized with L. monocytogenes; raw product is an important source of the organism to the plant.
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Affiliation(s)
- Mark E Berrang
- U.S. Department of Agriculture, Agricultural Research Service, Russell Research Center, Athens, Georgia 30604-5677, USA.
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18
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Ayaz ND, Ayaz Y, Kaplan YZ, Dogru AK, Aksoy MH. Rapid detection ofListeria monocytogenes in chicken carcasses by IMS-PCR. ANN MICROBIOL 2009. [DOI: 10.1007/bf03179217] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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19
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González-Fandos E, Herrera B, Maya N. Efficacy of citric acid againstListeria monocytogenesattached to poultry skin during refrigerated storage. Int J Food Sci Technol 2009. [DOI: 10.1111/j.1365-2621.2007.01673.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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20
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CEYLAN Z, DEMİRKAYA A, ADIGÜZEL G. INCIDENCE OF LISTERIA MONOCYTOGENES IN RETAIL CHICKEN MEAT AND ESTABLISHING RELATIONSHIP WITH SOME BACTERIA BY LOGISTIC REGRESSION. J FOOD QUALITY 2008. [DOI: 10.1111/j.1745-4557.2007.00188.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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21
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Cohen N, Ennaji H, Bouchrif B, Hassar M, Karib H. Comparative Study of Microbiological Quality of Raw Poultry Meat at Various Seasons and for Different Slaughtering Processes in Casablanca (Morocco). J APPL POULTRY RES 2007. [DOI: 10.3382/japr.2006-00061] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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22
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González-Fandos E, Dominguez J. Effect of potassium sorbate washing on the growth of Listeria monocytogenes on fresh poultry. Food Control 2007. [DOI: 10.1016/j.foodcont.2006.04.008] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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23
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González-Fandos E, Dominguez JL. Efficacy of lactic acid against Listeria monocytogenes attached to poultry skin during refrigerated storage. J Appl Microbiol 2006; 101:1331-9. [PMID: 17105564 DOI: 10.1111/j.1365-2672.2006.03022.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIMS The aim of this study was to evaluate the effect of lactic acid washing on the growth of Listeria monocytogenes on poultry legs stored at 4 degrees C for 7 days. METHODS AND RESULTS Fresh inoculated chicken legs were dipped into either a 0.11, 0.22 mol l(-1) or 0.55 mol l(-1) lactic acid solution for 5 min or distilled water (control). Surface pH values, sensorial characteristics and L. monocytogenes, mesophiles and pychrotrophs counts were evaluated after treatment (day 0) and after 1, 3, 5 and 7 days of storage at 4 degrees C. Legs washed with 0.55 mol l(-1) lactic acid for 5 min showed a significant (P < 0.05) inhibitory effect on L. monocytogenes compared with control legs, being about 1.74 log units lower in the first ones than in control legs after 7 days of storage. Sensory quality was not adversely affected by lactic acid, with the exception of colour. CONCLUSIONS Treatments with 0.55 mol l(-1) lactic acid reduced bacterial growth and preserved reasonable sensorial quality after storage at 4 degrees C for 7 days. However, it was observed a reduction in the colour score within 1 day post-treatment with 0.55 mol l(-1) lactic. SIGNIFICANCE AND IMPACT OF THE STUDY This study demonstrates that, while lactic acid did reduce populations of L. monocytogenes on poultry, it did not completely inactivate the pathogen. The application of lactic acid may be used as an additional hurdle contributing to extend the shelf-life of raw poultry.
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Affiliation(s)
- E González-Fandos
- Food Technology Department. University of La Rioja, La Rioja, Spain.
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24
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Francois K, Devlieghere F, Uyttendaele M, Standaert AR, Geeraerd AH, Nadal P, Van Impe JF, Debevere J. Single cell variability of L. monocytogenes grown on liver pate and cooked ham at 7oC: comparing challenge test data to predictive simulations. J Appl Microbiol 2006; 100:800-12. [PMID: 16553736 DOI: 10.1111/j.1365-2672.2006.02833.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS The variability in growth between individual Listeria monocytogenes cells was investigated on liver pâté and cooked ham. These results were compared to Monte Carlo simulations based on data collected previously in broths (Francois et al., submitted for publication). METHODS AND RESULTS Single cells were isolated by a dilution protocol and inoculated on 15 g samples of liver pâté and cooked ham, pasteurized in the packaging. Of each product, 250 samples were inoculated, of which 50 samples were analysed for L. monocytogenes on each analysis day. Results were compared to simulations, based on distributions that describe the variability of the individual cell lag phases and generation times of L. monocytogenes cultivated in broths. Based on the same simulation techniques, the variability effect was investigated for different inoculum levels (10, 100, 10,00 and 10,000 cells). It was demonstrated that the expected variability of the outgrowth of L. monocytogenes in a challenge test is very high for low inoculum levels. CONCLUSIONS The variability in growth characteristics observed between different single L. monocytogenes cells on foods is very large. The simulations based on the previously collected optical density data in broths, could be confirmed by foods inoculated with single L. monocytogenes cells. SIGNIFICANCE AND IMPACT OF THE STUDY The large variability between different individual L. monocytogenes cells has serious consequences for the experimental design of a challenge test. One thousand cells per portion are necessary in order to reduce the variability to acceptable levels and quantify the behaviour of the pathogen consistently with a reasonable number of challenge tests.
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Affiliation(s)
- K Francois
- Laboratory of Food Microbiology and Food Preservation, Department of Food Safety and Food Quality, Ghent University, Ghent, Belgium
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Praakle-Amin K, Hänninen ML, Korkeala H. Prevalence and genetic characterization of Listeria monocytogenes in retail broiler meat in Estonia. J Food Prot 2006; 69:436-40. [PMID: 16496590 DOI: 10.4315/0362-028x-69.2.436] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The prevalence and genetic diversity of Listeria monocytogenes in raw broiler legs at the retail level in Estonia were studied. A total of 240 raw broiler legs (120 from Estonia and 120 of foreign origin, which had been imported to Estonia from Denmark, Finland, Hungary, Sweden, and the United States) from 12 retail stores in the two largest cities in Estonia (Tallinn and Tartu) were investigated from January to December 2002. Of these, 70% were positive for L. monocytogenes. The prevalence of L. monocytogenes in broiler legs of Estonian origin (88%) was significantly higher than in broiler legs of foreign origin (53%) (P < 0.001). Altogether, 169 (106 Estonian and 63 imported) L. monocytogenes isolates were characterized by pulsed-field gel electrophoresis (PFGE) typing after treatment with the restriction enzyme AscI. The isolates showed a wide genetic diversity, with 35 different PFGE types obtained. Of these, 11 PFGE types came only from isolates of broiler legs of Estonian origin, 4 of Danish origin, 2 of Finnish origin, and 4 of Hungarian origin. Fourteen PFGE types came from isolates of broiler legs that originated from various countries. The strains that shared the same PFGE types from isolates of Estonian origin were recovered from broiler legs that came from different stores over the course of several months. Seventy-one L. monocytogenes isolates, including all PFGE types, were serotyped, and three serotypes (1/2a, 1/2b, and 4b) were obtained. Serotype 1/2a accounted for 96% of the isolates.
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Affiliation(s)
- Kristi Praakle-Amin
- Department of Food and Environmental Hygiene, Faculty of Veterinary Medicine, University of Helsinki, Finland.
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Francois K, Devlieghere F, Uyttendaele M, Debevere J. Risk assessment of Listeria monocytogenes: impact of individual cell variability on the exposure assessment step. RISK ANALYSIS : AN OFFICIAL PUBLICATION OF THE SOCIETY FOR RISK ANALYSIS 2006; 26:105-14. [PMID: 16492184 DOI: 10.1111/j.1539-6924.2006.00716.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Recently, the lag phase research in predictive microbiology is focusing more on the individual cell variability, especially for pathogenic microorganisms that typically occur in very low contamination levels, like Listeria monocytogenes. In this study, the effect of this individual cell lag phase variability was introduced in an exposure assessment study for L. monocytogenes in a liver pâté. A basic framework was designed to estimate the contamination level of pâté at the time of consumption, taking into account the frequency of contamination and the initial contamination levels of pâté at retail. Growth was calculated on pâté units of 150 g, comparing an individual-based approach with a classical population-based approach. The two different protocols were compared using simulations. If only the individual cell lag variability was taken into account, important differences were observed in cell density at the time of consumption between the individual-based approach and the classical approach, especially at low inoculum levels, resulting in high variability when using the individual-based approach. Although, when all variable factors were taken into account, no significant differences were observed between the different approaches, allowing the conclusion that the individual cell lag phase variability was overruled by the global variability of the exposure assessment framework. Even in more extreme conditions like a low inoculum level or a low water activity, no differences were created in cell density at the time of consumption between the individual-based approach and the classical approach. This means that the individual cell lag phase variability of L. monocytogenes has important consequences when studying specific growth cases, especially when the applied inoculum levels are low, but when performing more general exposure assessment studies, the variability between the individual cell lag phases is too limited to have a major impact on the total exposure assessment.
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Affiliation(s)
- K Francois
- Laboratory of Food Microbiology and Food Preservation, Department of Food Safety and Food Quality, Ghent University, Coupure Links 653, B-9000 Ghent, Belgium
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Reiter MGR, Bueno CMM, López C, Jordano R. Occurrence of Campylobacter and Listeria monocytogenes in a poultry processing plant. J Food Prot 2005; 68:1903-6. [PMID: 16161691 DOI: 10.4315/0362-028x-68.9.1903] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The occurrence of Campylobacter and Listeria monocytogenes was studied in 645 samples from surfaces, water, and poultry products (chicken carcasses, chicken parts, viscera, and spoils) in a poultry processing plant in southern Brazil. The automated mini-VIDAS system was used to detect the presence of Campylobacter and L. monocytogenes on the samples. The positive samples were confirmed by conventional methods. Campylobacter and L. monocytogenes were found in 16.6 and 35.6% of the analyzed samples, respectively. The sampling points with the highest Campylobacter incidence were intestine (63.3%, 19 of 30 samples), gallbladder (46.7%, 14 of 30), carcasses before evisceration (33.33%, 10 of 30), and carcasses after plucking (30%, 9 of 30). For L. monocytogenes, the majority of positive samples were from frozen breast (100%, 15 of 15 samples), frozen wing (93.3%, 14 of 15), fresh breast (83.3%, 25 of 30), fresh wing (80%, 24 of 30), skin of breast and leg (76.7%, 23 of 30), frozen leg (60%, 9 of 15), and fresh leg (50%, 15 of 30).
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Affiliation(s)
- Mercedes G R Reiter
- Department of Natural Sciences, Regional University of Blumenau, Blumenau, Santa Catarina, Brazil
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28
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Rørvik LM, Aase B, Alvestad T, Caugant DA. Molecular epidemiological survey of Listeria monocytogenes in broilers and poultry products. J Appl Microbiol 2003; 94:633-40. [PMID: 12631199 DOI: 10.1046/j.1365-2672.2003.01895.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
AIMS To investigate the prevalence of Listeria monocytogenes in poultry products, and to elucidate whether poultry products may be linked to listeriosis cases. A further goal was to identify contamination routes for L. monocytogenes to broiler carcasses. METHODS AND RESULTS Poultry products (385 samples) were screened for L. monocytogenes. The recovered isolates and 19 patient isolates were characterized by multilocus enzyme electrophoresis and restriction enzyme analysis. The poultry isolates showed great genetic diversity, but no identical subclones were identified from poultry sources and patients. One slaughterhouse was examined in detail during a 16-month period. The contamination rates increased along the processing line, and one subclone was found during the whole period. Only low prevalence of the bacteria was revealed from broiler faeces. CONCLUSIONS The prevalence of L. monocytogenes in poultry products was high, but no listeriosis cases was linked to poultry products. Broilers seem to be contaminated during the slaughter process, and specific strains may persist in the processing environment. Broiler faeces does not seem to be an important source of L. monocytogenes in poultry products. SIGNIFICANCE AND IMPACT OF THE STUDY Preventive measures to avoid contamination of poultry products by L. monocytogenes must be taken in the processing plants.
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Affiliation(s)
- L M Rørvik
- Department of Pharmacology, Microbiology and Food Hygiene, The Norwegian School of Veterinary Science, Oslo, Norway.
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Capita R, Alonso-Calleja C. Comparison of different most-probable-number methods for enumeration of Listeria in poultry. J Food Prot 2003; 66:65-71. [PMID: 12540183 DOI: 10.4315/0362-028x-66.1.65] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
To estimate levels of Listeria spp. in poultry and to select the most appropriate enumeration method for routine analysis, 40 naturally contaminated retail chicken carcasses were tested in Ponferrada (León, N.W. Spain) using the direct plate count technique and various most-probable-number (MPN) designs (UVM I [University of Vermont modified Listeria enrichment broth], Fraser enrichment broth, or both were used in 3-, 5-, and 10-tube MPN techniques). MPN estimation was obtained from the number of tubes with Listeria confirmed (after streaking on PALCAM and modified Oxford agars: "true" MPN) and from the number of dark Fraser broth tubes ("predictive" MPN). Samples were analyzed in duplicate. Low levels of Listeria were found (< 110 CFU/g). The direct plate count technique was totally ineffective for enumerating Listeria in poultry. The single-step (UVM I) and the two-step (UVM I-Fraser) MPN methods gave comparable estimations and a low number of significantly discrepant predictions. Using a single-step method with Fraser broth, lower true MPNs were obtained. The number of tubes used (3, 5, or 10) did not have a substantial influence on the results. Similar estimations, highly correlated (r = 0.538 to 0.968; P < 0.001), were found with (true MPN) and without (predictive MPN) plating confirmation when using the two-step MPN method. The statistical evaluation of the differential character of Fraser broth as part of the two-step MPN method showed high sensitivity (87.5 to 92.5%), specificity (95.2 to 98.6%), efficiency (94.2 to 97.6%), and predictive values (73.6 to 89.9% for a positive test and 98.0 to 98.9% for a negative test). Taking into account these results, we suggest the convenience of using a 3- or 5-tube two-step (UVM I-Fraser) MPN method with estimations obtained from the number of tubes with darkening, without confirmation, in order to achieve great savings in time and money.
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Affiliation(s)
- Rosa Capita
- Area de Nutrición y Bromatología, Escuela Superior y Técnica de Ingeniería Agraria (ESTIA), Universidad de León (Campus de Ponferrada), Avda. Astorga, s/n, 24400-Ponferrada (León), Spain.
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Antunes P, Réu C, Sousa JC, Pestana N, Peixe L. Incidence and susceptibility to antimicrobial agents of Listeria spp. and Listeria monocytogenes isolated from poultry carcasses in Porto, Portugal. J Food Prot 2002; 65:1888-93. [PMID: 12495006 DOI: 10.4315/0362-028x-65.12.1888] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The occurrence of Listeria spp. and Listeria monocytogenes in 63 samples of Portuguese poultry carcasses obtained from two local butcher shops and one canteen in the city of Porto, Portugal, and the susceptibility of these bacteria to antimicrobial agents allowed for use in human or animal therapeutics were evaluated. All poultry samples were contaminated with Listeria spp., and L. monocytogenes was isolated from 41% (26 of 63) of the samples. Other Listeria species, including L. innocua, L. welshimeri, and L. seeligeri, were also isolated from poultry samples. A multiplex polymerase chain reaction method was used for the identification of all of the Listeria isolates; this method showed total conformity with the conventional method of biochemical identification and proved to be more reliable, faster, and less arduous. In addition, high percentages of Listeria spp. (84%) and L. monocytogenes (73%) isolates were found to be resistant to one or more antimicrobial agents of different groups, and 12 different resistance profiles were recorded. The frequency of the resistance of L. monocytogenes isolates to enrofloxacin and clindamycin is notable. The results of this study suggest a high incidence of L. monocytogenes on Portuguese poultry products available for consumers and indicate that poultry could be a potential vehicle of foodborne infections due to strains of L. monocytogenes that are resistant to antimicrobial agents.
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Affiliation(s)
- Patrícia Antunes
- Faculty of Nutrition and Food Sciences, University of Porto, Dr. Roberto Frias, 4200 Porto, Portugal
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Miettinen MK, Palmu L, Björkroth KJ, Korkeala H. Prevalence of Listeria monocytogenes in broilers at the abattoir, processing plant, and retail level. J Food Prot 2001; 64:994-9. [PMID: 11456209 DOI: 10.4315/0362-028x-64.7.994] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The environment and products from two broiler abattoirs and processing plants and raw broiler pieces at the retail level were sampled for Listeria monocytogenes in order to evaluate the contamination level of the broiler carcasses and products. Sampling started in the slaughtering process and finished with raw broiler meat or ready-to-eat cooked product. Sampling sites positive for L. monocytogenes at the broiler abattoir were the air chiller, the skin-removing machine, and the conveyor belt leading to the packaging area. The L monocytogenes contamination rate varied from 1 to 19% between the two plants studied. Furthermore, 62% (38 of 61) of the raw broiler pieces, bought from retail stores, were positive for L. monocytogenes. Altogether, 136 L. monocytogenes isolates were obtained for serotyping and pulsed-field gel electrophoresis (PFGE) characterization performed with two rare-cutting enzymes (ApaI and AscI). Altogether three serotypes (1/2a, 1/2c, and 4b) and 14 different PFGE types were obtained using information provided from both ApaI and AscI patterns for discrimination basis. The two broiler abattoirs studied did not share the same PFGE types. However, the same PFGE types found in the raw broiler pieces at the retail level were also found in the broiler abattoirs where the broilers had been slaughtered.
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Affiliation(s)
- M K Miettinen
- Department of Food and Environmental Hygiene, Faculty of Veterinary Medicine, University of Helsinki, Finland.
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Capita R, Alonso-Calleja C, Garcı́a-Arias MT, Moreno B, Garcı́a-Fernández MC. Evaluation of Fraser Broth to Isolate Listeria from Poultry. Lebensm Wiss Technol 2000. [DOI: 10.1006/fstl.2000.0712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Borges MDF, Siqueira RSD, Bittencourt AM, Vanetti MCD, Gomide LAM. Occurrence of Listeria monocytogenes in salami. ACTA ACUST UNITED AC 1999. [DOI: 10.1590/s0001-37141999000400012] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Eighty-one samples of four different types of salami (Friolan, Hamburguese, Italian and Milanese), belonging to five brands, and purchased at Rio de Janeiro market, were evaluated for the occurrence of Listeria monocytogenes. The pathogen was detected in 13.3% of Italian type samples of salami, while L. innocua occurred in 6.5% of the Italian type and in 16.6% of the Milanese type. The remaining samples were negative for Listeria spp.
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Yuste J, Mor-Mur M, Capellas M, Pla R. Listeria innocua and aerobic mesophiles during chill storage of inoculated mechanically recovered poultry meat treated with high hydrostatic pressure. Meat Sci 1999; 53:251-7. [DOI: 10.1016/s0309-1740(99)00064-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/1999] [Revised: 03/08/1999] [Accepted: 04/28/1999] [Indexed: 10/18/2022]
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