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Knific T, Ocepek M, Kirbiš A, Krt B, Prezelj J, Gethmann JM. Quantitative Risk Assessment of Exposure to Mycobacterium avium subsp. paratuberculosis (MAP) via Different Types of Milk for the Slovenian Consumer. Foods 2022; 11:foods11101472. [PMID: 35627042 PMCID: PMC9140596 DOI: 10.3390/foods11101472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2022] [Revised: 05/05/2022] [Accepted: 05/17/2022] [Indexed: 11/16/2022] Open
Abstract
This study aimed to assess the risk of exposure to Mycobacterium avium subsp. paratuberculosis (MAP) via milk for the Slovenian consumer. MAP is suspected to be associated with several diseases in humans, therefore the risk of exposure should be better understood. The primary source of MAP for humans is thought to be cattle, in which MAP causes paratuberculosis or Johne’s disease. We developed a stochastic quantitative risk assessment model using Monte Carlo simulations. Considering the assumptions and uncertainties, we estimated the overall risk of exposure to MAP via milk to be low. For people consuming raw milk from MAP positive farms, the risk was high. On-farm pasteurisation reduced the risk considerably, but not completely. The risk of exposure via pasteurised retail milk was most likely insignificant. However, with a higher paratuberculosis prevalence the risk would also increase. Given the popularity of raw milk vending machines and homemade dairy products, this risk should not be ignored. To reduce the risk, consumers should heat raw milk before consumption. To prevent a potential public health scare and safeguard farmers’ livelihoods, a reduction in paratuberculosis prevalence should be sought. Our results show that culling clinically infected cows was insufficient to reduce milk contamination with MAP.
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Affiliation(s)
- Tanja Knific
- Institute of Food Safety, Feed and Environment, Veterinary Faculty, University of Ljubljana, Gerbičeva ulica 60, 1000 Ljubljana, Slovenia;
- Correspondence:
| | - Matjaž Ocepek
- Institute of Microbiology and Parasitology, Veterinary Faculty, University of Ljubljana, Gerbičeva ulica 60, 1000 Ljubljana, Slovenia; (M.O.); (B.K.)
| | - Andrej Kirbiš
- Institute of Food Safety, Feed and Environment, Veterinary Faculty, University of Ljubljana, Gerbičeva ulica 60, 1000 Ljubljana, Slovenia;
| | - Branko Krt
- Institute of Microbiology and Parasitology, Veterinary Faculty, University of Ljubljana, Gerbičeva ulica 60, 1000 Ljubljana, Slovenia; (M.O.); (B.K.)
| | - Jasna Prezelj
- Department of Mathematics, Faculty of Mathematics and Physics, University of Ljubljana, Jadranska ulica 19, 1000 Ljubljana, Slovenia;
- Department of Mathematics, Faculty of Mathematics, Natural Sciences and Information Technologies, University of Primorska, Glagoljaška 8, 6000 Koper, Slovenia
- Institute of Mathematics, Physics and Mechanics, Jadranska ulica 19, 1000 Ljubljana, Slovenia
| | - Jörn M. Gethmann
- Friedrich-Loeffler-Institut, Federal Research Institute for Animal Health, Institute of Epidemiology, Südufer 10, 17493 Greifswald-Insel Riems, Germany;
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Foddai ACG, Watson G, McAloon CG, Grant IR. Phagomagnetic separation-quantitative PCR: A rapid, sensitive and specific surveillance tool for viable Mycobacterium avium ssp. paratuberculosis in bulk tank and individual cow milk samples. J Dairy Sci 2021; 104:5218-5228. [PMID: 33663850 DOI: 10.3168/jds.2020-19626] [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: 09/11/2020] [Accepted: 12/30/2020] [Indexed: 12/24/2022]
Abstract
Bulk tank milk samples from 392 Northern Ireland dairy farms and individual milk from animals (n = 293) on 4 of these farms were tested by a novel phagomagnetic separation (PhMS)-quantitative (q)PCR assay able to detect and quantify viable Mycobacterium avium ssp. paratuberculosis (MAP), to demonstrate its potential utility as a milk surveillance tool. Viable MAP were detected in 26.5% of the bulk tank milks, with MAP contamination levels ranging from 1 to 8,432 MAP/50 mL of milk; less than 2% of farms had MAP contamination levels >100 MAP/50 mL in their bulk tank milk. Follow-up PhMS-qPCR testing of milk from individual animals on 4 farms that had the highest numbers of MAP in their bulk tank milks indicated that 17 to 24% of animals in each herd were shedding viable MAP in their milk. Mean MAP numbers detected ranged between 6.7 and 42.1 MAP/50 mL of milk. No significant correlation was observed between the detection of viable MAP in bulk or individual milks by PhMS-qPCR and parallel milk ELISA results, or between PhMS-qPCR results and any other milk recording results (somatic cell count, total bacterial count, % butterfat, or % protein). Viable MAP was detected by IS900 qPCR in 52 (85.2%) Pozzato broth cultures of 61 PhMS-qPCR-positive individual milks after 12 wk of incubation, suggesting few PhMS-qPCR results were false positives. The mean sensitivities of the PhMS-qPCR assay and milk ELISA applied to individual milks were estimated by Bayesian latent class analysis to be 0.7096 and 0.2665, respectively, and mean specificities were similar (0.9626 and 0.9509). Our findings clearly demonstrate that the novel PhMS-qPCR assay could be a useful milk surveillance tool for dairy processors, or a milk monitoring tool for Johne's disease control or milk quality assurance programs.
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Affiliation(s)
- Antonio C G Foddai
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, Northern Ireland, United Kingdom
| | - Gary Watson
- Dale Farm Cooperative Limited, Dale Farm House, 15 Dargan Rd, Belfast BT3 9LS, Northern Ireland, United Kingdom
| | - Conor G McAloon
- Section of Herd Health and Animal Husbandry, School of Veterinary Medicine, University College Dublin, Dublin D04 W6F6, Ireland
| | - Irene R Grant
- Institute for Global Food Security, School of Biological Sciences, Queen's University Belfast, 19 Chlorine Gardens, Belfast BT9 5DL, Northern Ireland, United Kingdom.
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Fusco V, Chieffi D, Fanelli F, Logrieco AF, Cho G, Kabisch J, Böhnlein C, Franz CMAP. Microbial quality and safety of milk and milk products in the 21st century. Compr Rev Food Sci Food Saf 2020; 19:2013-2049. [DOI: 10.1111/1541-4337.12568] [Citation(s) in RCA: 47] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 04/03/2020] [Accepted: 04/03/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Vincenzina Fusco
- Institute of Sciences of Food Production National Research Council of Italy (CNR‐ISPA) Bari Italy
| | - Daniele Chieffi
- Institute of Sciences of Food Production National Research Council of Italy (CNR‐ISPA) Bari Italy
| | - Francesca Fanelli
- Institute of Sciences of Food Production National Research Council of Italy (CNR‐ISPA) Bari Italy
| | - Antonio F. Logrieco
- Institute of Sciences of Food Production National Research Council of Italy (CNR‐ISPA) Bari Italy
| | - Gyu‐Sung Cho
- Department of Microbiology and BiotechnologyMax‐Rubner Institut Kiel Germany
| | - Jan Kabisch
- Department of Microbiology and BiotechnologyMax‐Rubner Institut Kiel Germany
| | - Christina Böhnlein
- Department of Microbiology and BiotechnologyMax‐Rubner Institut Kiel Germany
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Sange MD, Becker A, Hassan AA, Bülte M, Ganter M, Siebert U, Abdulmawjood A. Development and validation of a loop-mediated isothermal amplification assay-a rapid and sensitive detection tool for Mycobacterium avium subsp. paratuberculosis in small ruminants. J Appl Microbiol 2019; 127:47-58. [PMID: 31002199 DOI: 10.1111/jam.14284] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2019] [Revised: 04/09/2019] [Accepted: 04/14/2019] [Indexed: 12/22/2022]
Abstract
AIMS The aim of this study was to design an assay for the identification of Mycobacterium avium subsp. paratuberculosis (MAP) to be used in faeces and milk samples of small ruminants with a loop-mediated isothermal amplification (LAMP) system, as a time-saving and user-friendly method in contrast to real-time PCR. METHODS AND RESULTS For the detection of MAP in milk and faeces of small ruminants, we developed a set of primers, specific for the target gene ISMap02. The analytical sensitivity of LAMP, when targeting ISMap02, showed a DNA detection limit of 10 fg μl-1 . After performing spiking experiments with two MAP reference strains, DSM 44133 and ATCC 19698T , the limit of detection, using the LAMP protocol described herein were 3·8 MAP CFU per ml milk and 12·5 MAP CFU per gram faeces. All LAMP results during the establishment of the assay were compared to those of the real-time PCR results. An internal amplification control was incorporated into the assay to exclude false-negative results produced and had no significant negative impact on the analytical sensitivity. Validation of the assay was confirmed by testing field samples of faeces and revising the results with real-time PCR. CONCLUSION Our study conducted the first MAP detection system with a LAMP targeting ISMap02. Due to the positive results we encourage the use of LAMP in combination with ISMap02, when detecting MAP in faeces samples, as an alternative to targeting other genes as f57 or IS900. Further research on MAP detection in different matrices like raw milk, tissue or sperm with this system is recommended. SIGNIFICANCE AND IMPACT OF THE STUDY This study provides new achievements in MAP diagnostic. Especially small ruminants do not show signs of diarrhoea until the terminal stage of the illness. The greatest task in fighting MAP is to rule out animals, which shed MAP with faeces and milk before showing symptoms of Johne's disease. Worldwide there is a need to eradicate animals, which are low MAP shedders to stop the illness spreading in animal holdings. MAP detection with LAMP is time saving, easy to use, does not need expensive equipment, as, for example, PCR kits and can be used without access to laboratories. The target gene ISMap02 was shown to be a specific insertion element for MAP and is a reliable aim in future MAP detection studies.
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Affiliation(s)
- M D Sange
- Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - A Becker
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - A A Hassan
- Institute of Food Science, Faculty of Veterinary Medicine of the Justus-Liebig-University Gießen, Gießen, Germany
| | - M Bülte
- Institute of Food Science, Faculty of Veterinary Medicine of the Justus-Liebig-University Gießen, Gießen, Germany
| | - M Ganter
- Clinic for Swine, Small Ruminants and Forensic Medicine, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - U Siebert
- Institute for Terrestrial and Aquatic Wildlife Research, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
| | - A Abdulmawjood
- Research Center for Emerging Infections and Zoonoses, University of Veterinary Medicine Hannover, Foundation, Hannover, Germany
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Robertson RE, Cerf O, Condron RJ, Donaghy JA, Heggum C, Jordan K. Review of the controversy over whether or not Mycobacterium avium subsp. paratuberculosis poses a food safety risk with pasteurised dairy products. Int Dairy J 2017. [DOI: 10.1016/j.idairyj.2017.04.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Serraino A, Bonilauri P, Giacometti F, Ricchi M, Cammi G, Piva S, Zambrini V, Canever A, Arrigoni N. Short communication: Investigation into Mycobacterium avium ssp. paratuberculosis in pasteurized milk in Italy. J Dairy Sci 2016; 100:118-123. [PMID: 27816242 DOI: 10.3168/jds.2016-11627] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2016] [Accepted: 09/11/2016] [Indexed: 11/19/2022]
Abstract
This study investigated the presence of viable Mycobacterium avium ssp. paratuberculosis (MAP) in pasteurized milk produced by Italian industrial dairy plants to verify the prediction of a previously performed risk assessment. The study analyzed 160 one-liter bottles of pasteurized milk from 2 dairy plants located in 2 different regions. Traditional cultural protocols were applied to 500mL of pasteurized milk for each sample. The investigation focused also on the pasteurization parameters and data on the microbiological characteristics of raw milk (total bacterial count) and pasteurized milk (Enterobacteriaceae and Listeria monocytogenes). No sample was positive for MAP, the pasteurization parameters complied with European Union legislation, and the microbiological analysis of raw and pasteurized milk showed good microbiological quality. The results show that a 7-log (or >7) reduction could be a plausible value for commercial pasteurization. The combination of hygiene practices at farm level and commercial pasteurization yield very low or absent levels of MAP contamination in pasteurized milk, suggesting that pasteurized milk is not a significant source of human exposure to MAP in the dairies investigated.
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Affiliation(s)
- A Serraino
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy
| | - P Bonilauri
- Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Via Pitagora 2, 42100 Reggio Emilia, Italy
| | - F Giacometti
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy.
| | - M Ricchi
- National Reference Centre for Paratuberculosis, Experimental Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Strada della Faggiola 1, 29027 Gariga di Podenzano (PC), Italy
| | - G Cammi
- National Reference Centre for Paratuberculosis, Experimental Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Strada della Faggiola 1, 29027 Gariga di Podenzano (PC), Italy
| | - S Piva
- Department of Veterinary Medical Sciences, University of Bologna, Via Tolara di Sopra 50, 40064 Ozzano Emilia (BO), Italy
| | - V Zambrini
- Granarolo s.p.a, Via Cadriano 27/2, 40121 Bologna, Italy
| | - A Canever
- Granarolo s.p.a, Via Cadriano 27/2, 40121 Bologna, Italy
| | - N Arrigoni
- National Reference Centre for Paratuberculosis, Experimental Institute for Zooprophylaxis in Lombardy and Emilia-Romagna, Strada della Faggiola 1, 29027 Gariga di Podenzano (PC), Italy
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Peterz M, Butot S, Jagadeesan B, Bakker D, Donaghy J. Thermal Inactivation of Mycobacterium avium subsp. paratuberculosis in Artificially Contaminated Milk by Direct Steam Injection. Appl Environ Microbiol 2016; 82:2800-2808. [PMID: 26944840 PMCID: PMC4836428 DOI: 10.1128/aem.04042-15] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2015] [Accepted: 02/23/2016] [Indexed: 01/06/2023] Open
Abstract
UNLABELLED The efficiency of direct steam injection (DSI) at 105 °C for 3 s to inactivate Mycobacterium avium subsp. paratuberculosis in milk at a pilot-plant scale was investigated. Milk samples were artificially contaminated with M. avium subsp. paratuberculosis and also with cow fecal material naturally infected with M. avium subsp. paratuberculosis. We also tested milk artificially contaminated with Mycobacterium smegmatis as a candidate surrogate to compare thermal inactivation between M. smegmatis and M. avium subsp. paratuberculosis. Following the DSI process, no viable M. avium subsp. paratuberculosis or M. smegmatis was recovered using culture methods for both strains. For pure M. avium subsp. paratuberculosis cultures, a minimum reduction of 5.6 log10 was achieved with DSI, and a minimum reduction of 5.7 log10 was found with M. smegmatis. The minimum log10 reduction for wild-type M. avium subsp. paratuberculosis naturally present in feces was 3.3. In addition, 44 dairy and nondairy powdered infant formula (PIF) ingredients used during the manufacturing process of PIF were tested for an alternate source for M. avium subsp. paratuberculosis and were found to be negative by quantitative PCR (qPCR). In conclusion, the results obtained from this study indicate that a >7-fold-log10 reduction of M. avium subsp. paratuberculosis in milk can be achieved with the applied DSI process. IMPORTANCE M. avium subsp. paratuberculosis is widespread in dairy herds in many countries. M. avium subsp. paratuberculosis is the causative agent of Johne's disease in cattle, and infected animals can directly or indirectly (i.e., fecal contamination) contaminate milk. Despite much research and debate, there is no conclusive evidence that M. avium subsp. paratuberculosis is a zoonotic bacterium, i.e., one that causes disease in humans. The presence of M. avium subsp. paratuberculosis or its DNA has been reported in dairy products, including pasteurized milk, cheese, and infant formula. In light of this, it is appropriate to evaluate existing mitigation measures to inactivate M. avium subsp. paratuberculosis in dairy products. The work conducted in this study describes the efficacy of direct steam injection, a thermal process commonly used in the dairy industry, to eliminate M. avium subsp. paratuberculosis and a surrogate bacterium in milk, thus ensuring the absence of M. avium subsp. paratuberculosis in dairy products subject to these process conditions.
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Affiliation(s)
- Mats Peterz
- Nestlé Research Center, Nestec Ltd., Lausanne, Switzerland
| | - Sophie Butot
- Nestlé Research Center, Nestec Ltd., Lausanne, Switzerland
| | | | - Douwe Bakker
- The Mycobact Consultancy, Lelystad, The Netherlands
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Serraino A, Bonilauri P, Arrigoni N, Ostanello F, Ricchi M, Marchetti G, Bonfante E, Albonetti S, Giacometti F. Quantitative risk assessment of Mycobacterium avium subsp. paratuberculosis survival in pasteurized milk in three dairy plants in Italy. Food Control 2014. [DOI: 10.1016/j.foodcont.2014.04.029] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Bakker D. Danish designs on the control of bovine paratuberculosis. Vet J 2013; 198:311-2. [PMID: 24268479 DOI: 10.1016/j.tvjl.2013.09.061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2013] [Accepted: 09/23/2013] [Indexed: 10/26/2022]
Affiliation(s)
- Douwe Bakker
- Department of Bacteriology and TSEs, Central Veterinary Institute of Wageningen University, Edelhertweg 15, 8200 AB Lelystad, The Netherlands.
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