1
|
Reale A, Puppo MC, Boscaino F, Garzon AG, Drago SR, Marulo S, Di Renzo T. Development and Evaluation of a Fermented Pistachio-Based Beverage Obtained by Colloidal Mill. Foods 2024; 13:2342. [PMID: 39123534 PMCID: PMC11312421 DOI: 10.3390/foods13152342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2024] [Revised: 07/22/2024] [Accepted: 07/23/2024] [Indexed: 08/12/2024] Open
Abstract
The aim of the present study was to develop a fermented pistachio beverage as a plant-based alternative to milk-based drinks. For this purpose, a colloidal mill was used to finely grind and homogenize the pistachios to obtain a homogeneous consistency and prevent sedimentation. In addition, lactic acid bacteria fermentation was used to develop unique flavours and characteristics in the final product and to achieve microbiological stability for up to 30 days of storage a 4 °C. The formulated beverages were evaluated for chemical-physical characteristics (pH, organic acid production, and fructose, sucrose, and glucose content), nutritional profile (proximate composition, amino acid and GABA content), and volatile organic composition by HS-SPME-GC/MS analysis. The pistachio-based beverages were characterized by a good source of protein, fat, fiber, and minerals (mainly K and P). The colloidal mill contributed to creating a homogeneous texture and to making the nutrients readily available to the starter microorganisms, which reached concentrations above 108 ufc/mL in the final products. The beverages were characterized by pronounced acidity and some by the presence of acetoin and 2,3-butanedione, volatile components associated with a yogurt- or kefir-like aroma. This innovative approach provides an alternative to traditional milk-based beverages and highlights the role of LAB in the development of nutritious and attractive plant-based beverages.
Collapse
Affiliation(s)
- Anna Reale
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
| | | | - Floriana Boscaino
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
| | - Antonela Guadalupe Garzon
- Instituto de Tecnología de Alimentos, CONICET, Facultad de Ingeniería Química—Universidad Nacional del Litoral, 1° de Mayo 3250, Santa Fe 3000, Argentina; (A.G.G.); (S.R.D.)
| | - Silvina Rosa Drago
- Instituto de Tecnología de Alimentos, CONICET, Facultad de Ingeniería Química—Universidad Nacional del Litoral, 1° de Mayo 3250, Santa Fe 3000, Argentina; (A.G.G.); (S.R.D.)
| | - Serena Marulo
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
| | - Tiziana Di Renzo
- Institute of Food Sciences, National Research Council (ISA-CNR), Via Roma 64, 83100 Avellino, Italy; (F.B.); (S.M.); (T.D.R.)
| |
Collapse
|
2
|
Hua Z, Thapa BB, Younce F, Tang J, Zhu MJ. Impacts of water activity on survival of Listeria innocua and Enterococcus faecium NRRL B-2354 in almonds during steam treatments. Int J Food Microbiol 2024; 413:110592. [PMID: 38308878 DOI: 10.1016/j.ijfoodmicro.2024.110592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 01/15/2024] [Accepted: 01/19/2024] [Indexed: 02/05/2024]
Abstract
Raw almonds have been associated with Salmonella outbreaks and multiple recalls related to Listeria monocytogenes contamination. While steam treatment has been approved for pasteurizing both conventional and organic whole almonds, there is limited understanding of how water activity (aw) influences the effectiveness of steam treatments in decontaminating almonds. Hence, this study aimed to assess and compare the efficacy of steam treatments against Listeria innocua and Enterococcus faecium NRRL B-2354, the known non-pathogenic surrogates, on almonds. It also sought to investigate the impact of almond's aw on bacterial resistance during steam treatments. Almond kernels were inoculated with ~8 log10 CFU/g of either E. faecium or L. innocua and equilibrated to aw 0.25 or 0.45 before being subjected to steam treatments at temperatures of 100-135 °C. Our results revealed that L. innocua exhibited lower resistance to steam compared to E. faecium, with 1.2-2.6 log10 CFU/g reductions for L. innocua and 1.0-2.0 log10 CFU/g reductions for E. faecium when the surface temperature of almonds reached 100-130 °C, depending on the aw of the almonds. The obtained DL. innocua, 100-130°C-values were 2.0-16.6 s, and DE. faecium, 100-130°C-values were 4.0-21.8 s, depending on the aw of almonds. In general, elevating steam temperatures and almond aw decreased the tolerance of L. innocua and E. faecium during steam inactivation. In addition, the z-values indicated that E. faecium on almonds was less sensitive to change in steam temperature compared to L. innocua, especially at lower aw. The zL. innocua-values were 36.6 °C and 35.7 °C, while zE. faecium-values were 48.9 °C and 42.7 °C in almonds with aw 0.25 and 0.45, respectively. Results from this study suggest that steam treatments serve as effective interventions for controlling pathogen contaminations in raw almonds.
Collapse
Affiliation(s)
- Zi Hua
- School of Food Science, Washington State University, Pullman, WA 99164, United States of America
| | - Bhim Bahadur Thapa
- School of Food Science, Washington State University, Pullman, WA 99164, United States of America
| | - Frank Younce
- School of Food Science, Washington State University, Pullman, WA 99164, United States of America
| | - Juming Tang
- Biological Systems Engineering, Washington State University, Pullman, WA 99164, United States of America
| | - Mei-Jun Zhu
- School of Food Science, Washington State University, Pullman, WA 99164, United States of America.
| |
Collapse
|
3
|
Kim SH, Park SH, Ahn JB, Kang DH. Inactivation of E. coli O157:H7, Salmonella enterica, and L. monocytogenes through semi-continuous superheated steam treatment with additional effects of enhancing initial germination rate and salinity tolerance. Food Microbiol 2024; 117:104373. [PMID: 37918996 DOI: 10.1016/j.fm.2023.104373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 08/26/2023] [Accepted: 08/28/2023] [Indexed: 11/04/2023]
Abstract
Superheated steam (SHS) is a powerful technology used to reduce bacteria on food surfaces while causing less damage to the underlying sublayer of food compared to conventional heating treatments. In this study, a semi-continuous SHS system was developed to inactivate foodborne pathogens within 1 s (Escherichia coli O157:H7, Salmonella enterica, and Listeria monocytogenes) on radish seed surfaces and to enhance the seeds' salinity tolerance, which is vital for adapting to arid and semi-arid regions. The temperature of the SHS was set to 200 °C and 300 °C, with flow rates of 5 m/s and 7 m/s, and treatments were cycled either once or three times. As a result, increased temperature (200 °C-300 °C) and number of treatments (1 time to 3 times) led to a significantly larger microbial reduction on the surface of radish seeds. E. coli O157:H7, S. enterica, and L. monocytogenes were reduced by 4.42, 4.73, and 3.95 log CFU/g (P < 0.05), respectively, after three SHS treatments at 300 °C and 7 m/s. However, due to the ongoing potential for recovery of residual microorganisms, further research involving combinations is essential to enhance the microbicidal effect. Water imbibition showed significantly higher values in the SHS-treated group up to 30 min, indicating faster germination rates in the SHS-treated group (71.3-81.3%) compared to the control group (52.7%) on the second day, indicating a significant enhancement in germination rate. In addition, the salinity resistance of the radish seeds increased after SHS treatment. When moisturized with 0.5% NaCl solution, more radish seeds germinated after treatment with SHS (40%) than controls (22.7%) (P < 0.05). The results of this study, the first to apply semi-continuous SHS to seeds, are expected to serve as a cornerstone for future pilot-scale investigations aiming to implement the system within the seed industry.
Collapse
Affiliation(s)
- Soo-Hwan Kim
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea
| | - Sang-Hyun Park
- Department of Food Science and Technology, Kongju National University, Yesan, Chungnam, 32439, Republic of Korea
| | - Jun-Bae Ahn
- 4 School of Food Service & Culinary Arts, Seowon University, Cheongju, Chungbuk, Republic of Korea
| | - Dong-Hyun Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea.
| |
Collapse
|
4
|
Lin Y, Suehr Q, Dolan K, Simsek S, Bergholz TM. Inactivation of Salmonella and Shiga-toxin producing Escherichia coli on soft wheat kernels using vacuum steam pasteurization. Int J Food Microbiol 2023; 406:110375. [PMID: 37660435 DOI: 10.1016/j.ijfoodmicro.2023.110375] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2023] [Revised: 08/21/2023] [Accepted: 08/29/2023] [Indexed: 09/05/2023]
Abstract
Wheat, the raw material for flour milling, can be contaminated with enteric pathogens, leading to outbreaks linked to flour. In previous lab-scale studies, vacuum steam treatment was able to reduce Salmonella Enteritidis PT30 and Shiga-toxin producing E. coli (STEC) O121 levels on soft wheat kernels while maintaining flour quality and gluten functionality. This study used a newly designed lab-scale vacuum steam pasteurizer (VSP) to evaluate its efficacy to inactivate multiple strains of Salmonella and STEC on soft wheat by modeling the non-isothermal time-temperature history during treatment and reduction of the microbial populations. The results demonstrated that vacuum steam treatment could effectively disinfect wheat grains inoculated with enteric pathogens. In this study, Salmonella strains were less thermally resistant than STEC strains. The D75°C of Salmonella strains were 2.8 and 3.2 min, and the D75°C of STEC ranged from 3.1 to 4.6 min. E. faecium had a D75°C of 3.3 min, which indicates that it could be used as surrogate for larger scale evaluation of vacuum steam pasteurization in the future but was not conservative compared to some of the STEC strains.
Collapse
Affiliation(s)
- Yawei Lin
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI 48824, United States of America
| | - Quincy Suehr
- Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI 48824, United States of America
| | - Kirk Dolan
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI 48824, United States of America; Department of Biosystems and Agricultural Engineering, Michigan State University, East Lansing, MI 48824, United States of America
| | - Senay Simsek
- Whistler Center for Carbohydrate Research, Department of Food Science, Purdue University, West Lafayette, IN 47907, United States of America
| | - Teresa M Bergholz
- Department of Food Science and Human Nutrition, Michigan State University, East Lansing, MI 48824, United States of America.
| |
Collapse
|
5
|
Ban GH, Kim SH, Kang DH, Park SH. Comparison of the efficacy of physical and chemical strategies for the inactivation of biofilm cells of foodborne pathogens. Food Sci Biotechnol 2023; 32:1679-1702. [PMID: 37780592 PMCID: PMC10533464 DOI: 10.1007/s10068-023-01312-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 04/03/2023] [Accepted: 04/13/2023] [Indexed: 10/03/2023] Open
Abstract
Biofilm formation is a strategy in which microorganisms generate a matrix of extracellular polymeric substances to increase survival under harsh conditions. The efficacy of sanitization processes is lowered when biofilms form, in particular on industrial devices. While various traditional and emerging technologies have been explored for the eradication of biofilms, cell resistance under a range of environmental conditions renders evaluation of the efficacy of control challenging. This review aimed to: (1) classify biofilm control measures into chemical, physical, and combination methods, (2) discuss mechanisms underlying inactivation by each method, and (3) summarize the reduction of biofilm cells after each treatment. The review is expected to be useful for future experimental studies and help to guide the establishment of biofilm control strategies in the food industry.
Collapse
Affiliation(s)
- Ga-Hee Ban
- Department of Food Science and Biotechnology, Ewha Womans University, Seoul, 03760 Republic of Korea
| | - Soo-Hwan Kim
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute of Agricultural and Life Sciences, Seoul National University, Seoul, 08826 Republic of Korea
| | - Dong-Hyun Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute of Agricultural and Life Sciences, Seoul National University, Seoul, 08826 Republic of Korea
| | - Sang-Hyun Park
- Department of Food Science and Technology, Kongju National University, Yesan, Chungnam 32439 Republic of Korea
| |
Collapse
|
6
|
Reduction of Aspergillus flavus and aflatoxin on almond kernels using gaseous chlorine dioxide fumigation. Food Chem 2023; 402:134161. [DOI: 10.1016/j.foodchem.2022.134161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2022] [Revised: 09/03/2022] [Accepted: 09/05/2022] [Indexed: 11/22/2022]
|
7
|
Practice and Progress: Updates on Outbreaks, Advances in Research, and Processing Technologies for Low-moisture Food Safety. J Food Prot 2023; 86:100018. [PMID: 36916598 DOI: 10.1016/j.jfp.2022.11.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 11/03/2022] [Accepted: 11/20/2022] [Indexed: 12/31/2022]
Abstract
Large, renowned outbreaks associated with low-moisture foods (LMFs) bring to light some of the potential, inherent risks that accompany foods with long shelf lives if pathogen contamination occurs. Subsequently, in 2013, Beuchat et al. (2013) noted the increased concern regarding these foods, specifically noting examples of persistence and resistance of pathogens in low-water activity foods (LWAFs), prevalence of pathogens in LWAF processing environments, and sources of and preventive measures for contamination of LWAFs. For the last decade, the body of knowledge related to LMF safety has exponentially expanded. This growing field and interest in LMF safety have led researchers to delve into survival and persistence studies, revealing that some foodborne pathogens can survive in LWAFs for months to years. Research has also uncovered many complications of working with foodborne pathogens in desiccated states, such as inoculation methods and molecular mechanisms that can impact pathogen survival and persistence. Moreover, outbreaks, recalls, and developments in LMF safety research have created a cascading feedback loop of pushing the field forward, which has also led to increased attention on how industry can improve LMF safety and raise safety standards. Scientists across academia, government agencies, and industry have partnered to develop and evaluate innovate thermal and nonthermal technologies to use on LMFs, which are described in the presented review. The objective of this review was to describe aspects of the extensive progress made by researchers and industry members in LMF safety, including lessons-learned about outbreaks and recalls, expansion of knowledge base about pathogens that contaminate LMFs, and mitigation strategies currently employed or in development to reduce food safety risks associated with LMFs.
Collapse
|
8
|
Xu S, Chen H. Vacuum packaging improved inactivation efficacy of moderate dry heat for decontamination of Salmonella on almond kernels. Int J Food Microbiol 2022; 379:109849. [DOI: 10.1016/j.ijfoodmicro.2022.109849] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Revised: 07/18/2022] [Accepted: 07/24/2022] [Indexed: 11/28/2022]
|
9
|
Fang J, Liu C, Law CL, Mujumdar AS, Xiao HW, Zhang C. Superheated steam processing: An emerging technology to improve food quality and safety. Crit Rev Food Sci Nutr 2022; 63:8720-8736. [PMID: 35389273 DOI: 10.1080/10408398.2022.2059440] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Heat processing is one of the most efficient strategies used in food industry to improve quality and prolong shelf life. However, conventional processing methods such as microwave heating, burning charcoal treatment, boiling, and frying are energy-inefficient and often lead to inferior product quality. Superheated steam (SHS) is an innovative technology that offers many potential benefits to industry and is increasingly used in food industry. Compared to conventional processing methods, SHS holds higher heat transfer coefficients, which can reduce microorganisms on surface of foodstuffs efficiently. Additionally, SHS generates a low oxygen environment, which prevents lipid oxidation and harmful compounds generation. Furthermore, SHS can facilitate development of desired product quality, such as protein denaturation with functional characteristics, proper starch gelatinization, and can also reduce nutrient loss, and improve the physicochemical properties of foodstuffs. The current work provides a comprehensive review of the impact of SHS on the nutritional, physicochemical, and safety properties of various foodstuffs including meat, fruits, and vegetables, cereals, etc. Additionally, it also provides food manufacturers and researchers with basic knowledge and practical techniques for SHS processing of foodstuffs, which may improve the current scope of SHS and transfer current food systems to a healthy and sustainable one.
Collapse
Affiliation(s)
- Jiajia Fang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS, Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, China)
| | - Chongxin Liu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS, Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, China)
| | - Chung-Lim Law
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, Selangor, Malaysia
| | - Arun S Mujumdar
- Department of Bioresource Engineering, McGill University, Quebec, Canada
| | - Hong-Wei Xiao
- College of Engineering, China Agricultural University, Beijing, China
| | - Chunjiang Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences (CAAS, Key Laboratory of Agro-Products Processing, Ministry of Agriculture, Beijing, China)
| |
Collapse
|
10
|
Rahmati E, Khoshtaghaza MH, Banakar A, Ebadi M. Decontamination technologies for medicinal and aromatic plants: A review. Food Sci Nutr 2022; 10:784-799. [PMID: 35311169 PMCID: PMC8907729 DOI: 10.1002/fsn3.2707] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 09/29/2021] [Accepted: 11/21/2021] [Indexed: 11/08/2022] Open
Abstract
Microbial quality assurance has always been an important subject in the production, trade, and consumption of medicinal and aromatic plants (MAPs). Most MAPs have therapeutic and nutritional properties due to the presence of active substances such as essential oils, flavonoids, alkaloids, etc. However, MAPs can become infected with microorganisms due to poor hygienic conditions during cultivation and postharvest processes. This problem reduces the shelf life and effective ingredients of the product. To overcome these problems, several technologies such as using ethylene oxide gas, gamma irradiation, and steam heating have been used. However, these technologies have disadvantages such as the formation of toxic by-products, low consumer acceptance, or may have a negative effect on the quality of MAPs. This requires a need for novel decontamination technology which can effectively reduce the biological contamination and minimize the food quality losses. In recent years, new technologies such as ozonation, cold plasma, ultraviolet, infrared, microwave, radiofrequency and combination of these technologies have been developed. In this review, biological contamination of MAPs and technologies used for their decontamination were studied. Also, the mechanism of inactivation of microorganisms and the efficacy of decontamination techniques on the qualitative and microbial characteristics of MAPs were investigated.
Collapse
Affiliation(s)
- Edris Rahmati
- Department of Biosystems EngineeringTarbiat Modares UniversityTehranIran
| | | | - Ahmad Banakar
- Department of Biosystems EngineeringTarbiat Modares UniversityTehranIran
| | | |
Collapse
|
11
|
Advances, Applications, and Comparison of Thermal (Pasteurization, Sterilization, and Aseptic Packaging) against Non-Thermal (Ultrasounds, UV Radiation, Ozonation, High Hydrostatic Pressure) Technologies in Food Processing. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12042202] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Nowadays, food treatment technologies are constantly evolving due to an increasing demand for healthier and tastier food with longer shelf lives. In this review, our aim is to highlight the advantages and disadvantages of some of the most exploited industrial techniques for food processing and microorganism deactivation, dividing them into those that exploit high temperatures (pasteurization, sterilization, aseptic packaging) and those that operate thanks to their inherent chemical–physical principles (ultrasound, ultraviolet radiation, ozonation, high hydrostatic pressure). The traditional thermal methods can reduce the number of pathogenic microorganisms to safe levels, but non-thermal technologies can also reduce or remove the adverse effects that occur using high temperatures. In the case of ultrasound, which inactivates pathogens, recent advances in food treatment are reported. Throughout the text, novel discoveries of the last decade are presented, and non-thermal methods have been demonstrated to be more attractive for processing a huge variety of foods. Preserving the quality and nutritional values of the product itself and at the same time reducing bacteria and extending shelf life are the primary targets of conscious producers, and with non-thermal technologies, they are increasingly possible.
Collapse
|
12
|
Liu S, Wei X, Tang J, Qin W, Wu Q. Recent developments in low-moisture foods: microbial validation studies of thermal pasteurization processes. Crit Rev Food Sci Nutr 2021:1-16. [PMID: 34927484 DOI: 10.1080/10408398.2021.2016601] [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] [Indexed: 10/19/2022]
Abstract
Outbreaks associated with low-moisture foods (e.g., wheat flour, nuts, and cereals) have urged the development of novel technologies and re-validation of legacy pasteurization process. For various thermal pasteurization processes, they share same scientific facts (e.g., bacterial heat resistance increased at reduced water activity) and guidelines. However, they also face specific challenges because of their different heat transfer mechanisms, processing conditions, or associated low-moisture foods' formulations. In this article, we first introduced the general structural for validating a thermal process and the shared basic information that would support our understanding of the key elements of each thermal process. Then, we reviewed the current progress of validation studies of 7 individual heating technologies (drying roasting, radiofrequency-assisted pasteurization, superheated steam, etc.) and the combined treatments (e.g., infrared and hot air). Last, we discussed knowledge gaps that require more scientific data in the future studies. We aimed to provide a process-centric view point of thermal pasteurization studies of low-moisture foods. The information could provide detailed protocol for process developers, operators, and managers to enhance low-moisture foods safety.
Collapse
Affiliation(s)
- Shuxiang Liu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou, China.,Institute of Food Processing and Safety, School of Food Science, Sichuan Agricultural University, Sichuan, China
| | - Xinyao Wei
- College of Biological Science and Engineering, Fuzhou University, Fuzhou, China
| | - Juming Tang
- Department of Biological Systems Engineering, Washington State University, Pullman, WA, USA
| | - Wen Qin
- Institute of Food Processing and Safety, School of Food Science, Sichuan Agricultural University, Sichuan, China
| | - Qingping Wu
- State Key Laboratory of Applied Microbiology Southern China, Guangdong Provincial Key Laboratory of Microbial Culture Collection and Application, Guangdong Open Laboratory of Applied Microbiology, Guangdong Institute of Microbiology, Guangzhou, China
| |
Collapse
|
13
|
|
14
|
Wason S, Verma T, Subbiah J. Validation of process technologies for enhancing the safety of low-moisture foods: A review. Compr Rev Food Sci Food Saf 2021; 20:4950-4992. [PMID: 34323364 DOI: 10.1111/1541-4337.12800] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2021] [Revised: 06/03/2021] [Accepted: 06/10/2021] [Indexed: 01/03/2023]
Abstract
The outbreaks linked to foodborne illnesses in low-moisture foods are frequently reported due to the occurrence of pathogenic microorganisms such as Salmonella Spp. Bacillus cereus, Clostridium spp., Cronobacter sakazakii, Escherichia coli, and Staphylococcus aureus. The ability of the pathogens to withstand the dry conditions and to develop resistance to heat is regarded as the major concern for the food industry dealing with low-moisture foods. In this regard, the present review is aimed to discuss the importance and the use of novel thermal and nonthermal technologies such as radiofrequency, steam pasteurization, plasma, and gaseous technologies for decontamination of foodborne pathogens in low-moisture foods and their microbial inactivation mechanisms. The review also summarizes the various sources of contamination and the factors influencing the survival and thermal resistance of pathogenic microorganisms in low-moisture foods. The literature survey indicated that the nonthermal techniques such as CO2 , high-pressure processing, and so on, may not offer effective microbial inactivation in low-moisture foods due to their insufficient moisture content. On the other hand, gases can penetrate deep inside the commodities and pores due to their higher diffusion properties and are regarded to have an advantage over thermal and other nonthermal processes. Further research is required to evaluate newer intervention strategies and combination treatments to enhance the microbial inactivation in low-moisture foods without significantly altering their organoleptic and nutritional quality.
Collapse
Affiliation(s)
- Surabhi Wason
- Department of Food Science, University of Arkansas System Division of Agriculture, Fayetteville, Arkansas, USA
| | - Tushar Verma
- Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| | - Jeyamkondan Subbiah
- Department of Food Science, University of Arkansas System Division of Agriculture, Fayetteville, Arkansas, USA.,Department of Food Science and Technology, University of Nebraska-Lincoln, Lincoln, Nebraska, USA
| |
Collapse
|
15
|
Deng LZ, Sutar PP, Mujumdar AS, Tao Y, Pan Z, Liu YH, Xiao HW. Thermal Decontamination Technologies for Microorganisms and Mycotoxins in Low-Moisture Foods. Annu Rev Food Sci Technol 2021; 12:287-305. [PMID: 33317321 DOI: 10.1146/annurev-food-062220-112934] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The contamination risks of microorganisms and mycotoxins in low-moisture foods have heightened public concern. Developing novel decontamination technologies to improve the safety of low-moisture foods is of great interest in both economics and public health. This review summarizes the working principles and applications of novel thermal decontamination technologies such as superheated steam, infrared, microwave, and radio-frequency heating as well as extrusion cooking. These methods of decontamination can effectively reduce the microbial load on products andmoderately destruct the mycotoxins. Meanwhile, several integrated technologies have been developed that take advantage of synergistic effects to achieve the maximum destruction of contaminants and minimize the deterioration of products.
Collapse
Affiliation(s)
- Li-Zhen Deng
- College of Engineering, China Agricultural University, 100083 Beijing, China; .,State Key Laboratory of Food Science and Technology, Nanchang University, 330047 Nanchang, China
| | - Parag Prakash Sutar
- Department of Food Process Engineering, National Institute of Technology, Rourkela, Odisha 769008, India
| | - Arun S Mujumdar
- Department of Bioresource Engineering, McGill University, Ste. Anne de Bellevue, Quebec H9X 3V9, Canada
| | - Yang Tao
- College of Food Science and Technology, Nanjing Agricultural University, 210095 Nanjing, China
| | - Zhongli Pan
- Department of Biological and Agricultural Engineering, University of California, Davis, California 95616, USA
| | - Yan-Hong Liu
- College of Engineering, China Agricultural University, 100083 Beijing, China;
| | - Hong-Wei Xiao
- College of Engineering, China Agricultural University, 100083 Beijing, China;
| |
Collapse
|
16
|
Thermal and non-thermal treatment effects on Staphylococcus aureus biofilms formed at different temperatures and maturation periods. Food Res Int 2020; 137:109432. [PMID: 33233114 DOI: 10.1016/j.foodres.2020.109432] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 05/30/2020] [Accepted: 06/09/2020] [Indexed: 11/20/2022]
Abstract
The objective of this study was to investigate the effect of temperature and maturation period on the resistance of Staphylococcus aureus biofilms to thermal and non-thermal treatments. First, biofilm development was compared at three different temperatures (15, 25, and 37°C) for 5 days. The cell population at 15 and 25°C remained relatively consistent approximately at 6.3 log CFU/cm2, whereas 37°C resulted in the highest cell population on day 1 (7.6 log CFU/cm2) followed by a continual decline. Then, biofilm resistance to steam and sodium hypochlorite (NaOCl) treatments was evaluated. Obtained results highlighted that biofilms had different resistance to both treatments depending on development conditions. Specifically, steam treatment of 10 s eliminated 4.1 log CFU/cm2 of the biofilm formed at 25°C for 5 days. The same treatment inactivated over 5 log population of biofilms developed in other temperature and maturation period conditions. Treatment with NaOCl reduced approximately 1 log CFU/cm2 of biofilm cells developed at 25°C for 5 days. However, inactivation was found to be over 2 log CFU/cm2 under other development conditions. An extracellular polymeric substances (EPS) quantification using 96-well plates and stainless steel coupons was conducted. In the 96-well plate experiment, it was found that the highest amount of polysaccharide was secreted at 25°C (p < 0.05), while total biomass and protein contents were greatest at 37°C (p < 0.05). No significant difference in EPS content was observed for stainless steel, but the results displayed a similar trend to the 96-well plate. In particular, biofilms developed at 25°C tended to secret the highest amount of polysaccharide, which aligned with the current literature. This finding indicated that polysaccharide was the main contribution to the enhanced resistance of S. aureus biofilms. Overall, it was shown that biofilms formed at 25°C for 5 days exhibited the greatest resistance to thermal and nonthermal treatments due to the elevated exopolysaccharide secretion. This study demonstrates that temperature and maturation period significantly affect the resistance of S. aureus biofilms to thermal and non-thermal treatments.
Collapse
|
17
|
Acuff JC, Wu J, Marik C, Waterman K, Gallagher D, Huang H, Williams RC, Ponder MA. Thermal inactivation of Salmonella, Shiga toxin-producing Escherichia coli, Listeria monocytogenes, and a surrogate (Pediococcus acidilactici) on raisins, apricot halves, and macadamia nuts using vacuum-steam pasteurization. Int J Food Microbiol 2020; 333:108814. [PMID: 32805576 DOI: 10.1016/j.ijfoodmicro.2020.108814] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 06/17/2020] [Accepted: 08/02/2020] [Indexed: 11/20/2022]
Abstract
Salmonella, Shiga toxin-producing Escherichia coli (STEC), and Listeria monocytogenes have been isolated from low water activity foods (LWAF), where they may survive for extended periods. The ready-to-eat nature of many LWAF, such as dried fruits and nuts, warrants effective post-harvest thermal treatment for the reduction of pathogens such as low-temperature, saturated steam, also known as vacuum-assisted steam pasteurization. The objective of this study was to determine reductions of Salmonella, STEC, L. monocytogenes, and a possible surrogate (Pediococcus acidilactici) on dried apricot halves, whole macadamia nuts, and raisins after treatment with vacuum-assisted steam at three temperatures (62 °C, 72 °C, or 82 °C) and multiple time intervals. Bacterial inactivation was variable between commodities, with higher temperatures and longer times necessary to achieve comparable reductions of pathogens on apricot halves and macadamia nuts compared to raisins. Reductions of the tested pathogens were comparable; therefore, one species was not more resistant than the others. Pathogens were reduced by 5-log CFU/g on apricot halves after 20 min at 72 °C and after 5 min at 82 °C. Longer treatment times were necessary to achieve reductions of each pathogen on macadamia nuts. Pathogens were reduced by nearly 5 log CFU/g on macadamia nuts after 38 min at 72 °C (4.6-6.5 log CFU/g) and after 12 min at 82 °C (4.9-5.7 log CFU/g). Reductions of pathogens on raisins were achieved at lower temperatures than necessary for the other foods. A 5-log reduction for each of the pathogens (CFU/g) on raisins occurred after 20 min at 62 °C and after 5 min at 72 °C. Overall, the reductions of the pathogens exceeded those of P. acidilactici on both the dried fruits and macadamia nuts. Statistically significant differences, indicating greater confidence as a conservative surrogate, were observed at lower treatment temperatures. Inactivation kinetics were modeled for each pathogen on each food type and temperature. Bacterial survival was best described by the Weibull model for raisins and macadamia nuts, while the Gompertz model best described reductions on apricot halves according to Akaike information criterion (AIC) and root-mean-square error (RMSE) evaluations. Water activity and moisture content were increased due to the treatments, which could be addressed through implementation of drying steps. Thermal inactivation kinetic models and 5-log reduction parameters can help food processors design and evaluate similar vacuum-assisted steam interventions to comply with FSMA regulations and preventive control plans. However, results or model predictions should not be extrapolated to assume the safety of other types of foods.
Collapse
Affiliation(s)
- Jennifer C Acuff
- Virginia Tech, Food Science and Technology, 1230 Washington St., Blacksburg, VA 24061, USA
| | - Jian Wu
- Virginia Tech, Food Science and Technology, 1230 Washington St., Blacksburg, VA 24061, USA
| | - Claire Marik
- Virginia Tech, Food Science and Technology, 1230 Washington St., Blacksburg, VA 24061, USA
| | - Kim Waterman
- Virginia Tech, Food Science and Technology, 1230 Washington St., Blacksburg, VA 24061, USA
| | - Daniel Gallagher
- Virginia Tech, Civil and Environmental Engineering Department, 409 Durham Hall, Blacksburg, VA 24061, USA
| | - Haibo Huang
- Virginia Tech, Food Science and Technology, 1230 Washington St., Blacksburg, VA 24061, USA
| | - Robert C Williams
- Virginia Tech, Food Science and Technology, 1230 Washington St., Blacksburg, VA 24061, USA
| | - Monica A Ponder
- Virginia Tech, Food Science and Technology, 1230 Washington St., Blacksburg, VA 24061, USA.
| |
Collapse
|
18
|
Hasani M, Wu F, Hu K, Farber J, Warriner K. Inactivation of Salmonella and Listeria monocytogenes on dried fruit, pistachio nuts, cornflakes and chocolate crumb using a peracetic acid-ethanol based sanitizer or Advanced Oxidation Process. Int J Food Microbiol 2020; 333:108789. [DOI: 10.1016/j.ijfoodmicro.2020.108789] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 06/30/2020] [Accepted: 07/08/2020] [Indexed: 12/28/2022]
|
19
|
Malekmohammadi S, Shah MK, Townsend Ramsett MK, Bergholz TM. Survival and thermal resistance among four Salmonella serovars inoculated onto flaxseeds. Food Microbiol 2020; 91:103516. [PMID: 32539945 DOI: 10.1016/j.fm.2020.103516] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 02/24/2020] [Accepted: 04/18/2020] [Indexed: 10/24/2022]
Abstract
Thermal resistance among Salmonella serovars has been shown to vary, however, such data are minimal for Salmonella inoculated onto low moisture foods. We evaluated survival and subsequent thermal resistance for 32 strains of Salmonella from four serovars (Agona, Enteritidis, Montevideo, and Tennessee) on flaxseed over 24 weeks. After inoculation, flaxseeds were adjusted to aw = 0.5 and stored at 22 °C. After 24 weeks at 22 °C, strains of serovar Agona had a significantly slower rate of reduction compared to those of Enteritidis and Montevideo (adj. p < 0.05). Inoculated flaxseeds were processed at 71 °C with vacuum steam pasteurization at 4 time points during storage. Average initial D71°C values ranging from 1.0 to 1.5 min were similar across serovars. Over 24 weeks, D71°C varied in a serovar-dependent manner. D71°C at 8, 16, and 24 weeks did not change significantly for Enteritidis and Montevideo but did for Tennessee and Agona. While significant, the differences in D71°C over time were less than 1 min, indicating that storage time prior to heat treatment would have a minimal effect on the processing time required to inactivate Salmonella on flaxseed.
Collapse
Affiliation(s)
- Sahar Malekmohammadi
- Department of Microbiological Sciences North Dakota State University, Fargo, ND, 58102, USA
| | - Manoj K Shah
- Department of Microbiological Sciences North Dakota State University, Fargo, ND, 58102, USA
| | | | - Teresa M Bergholz
- Department of Microbiological Sciences North Dakota State University, Fargo, ND, 58102, USA.
| |
Collapse
|
20
|
Bahrami A, Moaddabdoost Baboli Z, Schimmel K, Jafari SM, Williams L. Efficiency of novel processing technologies for the control of Listeria monocytogenes in food products. Trends Food Sci Technol 2020. [DOI: 10.1016/j.tifs.2019.12.009] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
|
21
|
Zhou Z, Zuber S, Campagnoli M, Putallaz T, Devlieghere F, Uyttendaele M. Effect of mild steaming treatment on the inactivation of Salmonella, Listeria monocytogenes, Escherichia coli O157:H7 and their surrogates on black peppercorns. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.106726] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
22
|
|
23
|
Cheng T, Wang S. Modified atmosphere packaging pre-storage treatment for thermal control of E. coli ATCC 25922 in almond kernels assisted by radio frequency energy. J FOOD ENG 2019. [DOI: 10.1016/j.jfoodeng.2018.11.011] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
24
|
Jo Y, Bae H, Kim SS, Ban C, Kim SO, Choi YJ. Inactivation of Bacillus cereus ATCC 14579 Spore on Garlic with Combination Treatments of Germinant Compounds and Superheated Steam. J Food Prot 2019; 82:691-695. [PMID: 30917044 DOI: 10.4315/0362-028x.jfp-18-401] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
HIGHLIGHTS Germinant compounds were combined with SHS to inactivate B. cereus spores. B. cereus spores were inactivated effectively by SHS after Ala+IMP treatment. Inactivation trend was analyzed by the Weibull model, and t3 d values were determined. Sublethal injury was not observed by SHS after Ala+IMP treatment.
Collapse
Affiliation(s)
- Youngje Jo
- 1 Department of Agricultural Biotechnology, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, Republic of Korea
| | - Hyeryeon Bae
- 1 Department of Agricultural Biotechnology, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, Republic of Korea
| | - Sang-Soon Kim
- 2 Department of Food Engineering, Dankook University, Cheonan, Chungnam 31116, Republic of Korea
| | - Choongjin Ban
- 3 Institute of Biomolecule Control, Sungkyunkwan University, Suwon, Gyunggi-do 16419, Republic of Korea
| | - Sang Oh Kim
- 4 LG Electronics, 51 Gasan Digital 1 ro, Geumcheongu, Seoul 08592, Republic of Korea
| | - Young Jin Choi
- 1 Department of Agricultural Biotechnology, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, Republic of Korea.,5 Center for Food and Bioconvergence, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, Republic of Korea.,6 Research Institute of Agriculture and Life Sciences, Seoul National University, 1 Gwanakro, Gwanakgu, Seoul 151-921, Republic of Korea
| |
Collapse
|
25
|
Kwon SA, Song WJ, Kang DH. Combination effect of saturated or superheated steam and lactic acid on the inactivation of Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes on cantaloupe surfaces. Food Microbiol 2019; 82:342-348. [PMID: 31027792 DOI: 10.1016/j.fm.2019.03.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Revised: 03/07/2019] [Accepted: 03/08/2019] [Indexed: 12/14/2022]
Abstract
The purpose of this study was to evaluate the effectiveness of the combination treatment of lactic acid immersion and saturated or superheated steam (SHS) on inactivation of foodborne pathogens on cantaloupes. Saturated steam (SS) treatments were performed at 100 °C, while SHS treatments were delivered at either 150 or 200 °C. Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes-inoculated cantaloupes were exposed to 2% lactic acid or sterile distilled water for 1 min followed by a maximum of 20 s of SS or SHS. Populations of each of the three pathogens on cantaloupes were reduced to under the detection limit (1.0 log CFU/cm2) after the combination treatment of 2% lactic acid and 200 °C steam for 20 s. To compare the effect of the lactic acid treatment method, we conducted spray application with 2% lactic acid combined with SS or SHS treatment; however, no significant log reduction differences were found between immersion and spraying techniques. After combination treatment of cantaloupes for 20 s, color and maximum load values (a characteristic of texture) were not significantly different from those of untreated controls. The results of this study suggest that the combination treatment of lactic acid and SHS can be used as an antimicrobial intervention for cantaloupes without inducing quality deterioration.
Collapse
Affiliation(s)
- Sun-Ah Kwon
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea
| | - Won-Jae Song
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea
| | - Dong-Hyun Kang
- Department of Food and Animal Biotechnology, Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute for Agricultural and Life Sciences, Seoul National University, Seoul, 08826, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, 25354, Republic of Korea.
| |
Collapse
|
26
|
Salt content dependent dielectric properties of pistachios relevant to radio-frequency pasteurization. Sci Rep 2019; 9:2400. [PMID: 30787372 PMCID: PMC6382758 DOI: 10.1038/s41598-019-38987-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 01/07/2019] [Indexed: 11/25/2022] Open
Abstract
This study was conducted to investigate the effect of salt content during radio-frequency (RF) heating on rate of temperature increase, dielectric properties (DPs), and reduction of pathogens in pistachios. Also, the effect of RF heating on pistachio quality of varying salt content was determined. Pistachios of different salt content (0, 100, and 330 mg sodium/serving) were inoculated with Salmonella enterica and treated in a 27.12-MHz RF heater. The RF heating rate increased when salt content was in the range of 0–100 mg sodium/serving, but there were no significant (P > 0.05) differences in the rate of temperature rise after salt content reached to 100 mg sodium/serving. Both dielectric constant and dielectric loss factor of pistachios increased with rising salt content. Along with increased salt content, RF treatment time required to reduce this pathogen by 4 log CFU/g decreased first and then remained the same above an upper limit of salt content corresponding to the peak heating rate. RF treatment did not significantly (P > 0.05) cause changes in the color and level of lipid oxidation of pistachios. The results of the current study imply that RF heating may be a potential intervention for inactivating foodborne pathogens in pistachios and that the effect of pasteurization is influenced by dielectric loss factor relative to salt content.
Collapse
|
27
|
Kharel K, Yemmireddy VK, Graham CJ, Prinyawiwatkul W, Adhikari A. Hot water treatment as a kill-step to inactivate Escherichia coli O157:H7, Salmonella enterica, Listeria monocytogenes and Enterococcus faecium on in-shell pecans. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.07.048] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|
28
|
Ban GH, Kang DH. Inactivation of Escherichia coli O157:H7, Salmonella typhimurium, and Listeria monocytogenes on cherry tomatoes and oranges by superheated steam. Food Res Int 2018; 112:38-47. [DOI: 10.1016/j.foodres.2018.05.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 05/23/2018] [Accepted: 05/30/2018] [Indexed: 11/16/2022]
|
29
|
Newkirk JJ, Wu J, Acuff JC, Caver CB, Mallikarjunan K, Wiersema BD, Williams RC, Ponder MA. Inactivation of Salmonella enterica and Surrogate Enterococcus faecium on Whole Black Peppercorns and Cumin Seeds Using Vacuum Steam Pasteurization. FRONTIERS IN SUSTAINABLE FOOD SYSTEMS 2018. [DOI: 10.3389/fsufs.2018.00048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
30
|
Casulli KE, Garces-Vega FJ, Dolan KD, Ryser ET, Harris LJ, Marks BP. Impact of Process Temperature, Humidity, and Initial Product Moisture on Thermal Inactivation of Salmonella Enteritidis PT 30 on Pistachios during Hot-Air Heating. J Food Prot 2018; 81:1351-1356. [PMID: 30019958 DOI: 10.4315/0362-028x.jfp-17-439] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Some thermal processes, such as pistachio roasting, are not yet well characterized with respect to the impact of product and process variables on Salmonella lethality. This study aimed to quantify the effects of process temperature, humidity, and initial product water activity (aw), on Salmonella lethality for in-shell pistachios. In-shell pistachios were inoculated with Salmonella Enteritidis PT 30 (∼8.5 log CFU/g), equilibrated (0.45 or 0.65 aw), and heated without soaking ("dry") or after a pure-water or 27% NaCl brining pretreatment ("presoaked"). Inoculated pistachio samples (15 g) were heated in a laboratory-scale, moist-air convection oven at 104.4 or 118.3°C, humidities of ∼3, 15, or 30%, v/v (∼24.4, 54.4, or 69.4°C dew point), and air speed of 1.3 m/s. Salmonella survivors were quantified at six times during each treatment, targeting total reductions of ∼3 to 5 log. Survivor data were analyzed using analysis of variance to identify main effects (time, temperature, humidity, and initial aw) and two-term interactions with time. As expected, lethality increased ( P < 0.05) with temperature and humidity. For example, the time to achieve a 4-log reduction decreased 50 to 80% when humidity increased from ∼3 to 30%. When the dry and presoaked treatments were analyzed separately, initial product aw (0.45 versus 0.65 aw or 0.75 versus 0.95 aw) did not affect lethality ( P > 0.05). However, when comparing dry against presoaked treatments, the time to achieve a 4-log reduction decreased 55 to 85% ( P < 0.05) for presoaked pistachios subjected to the same temperature-humidity treatment. Salt had no effect ( P > 0.05) on lethality outcomes. These results, relative to initial aw, process humidity, brining, and salt effects on process lethality, are critically important and must be considered in the design and validation of thermal processes for Salmonella reduction in pistachio processing.
Collapse
Affiliation(s)
- Kaitlyn E Casulli
- 1 Department of Biosystems and Agricultural Engineering, 524 South Shaw Lane (ORCID: http://orcid.org/0000-0003-1234-257X [K.E.C.]) and
| | - Francisco J Garces-Vega
- 1 Department of Biosystems and Agricultural Engineering, 524 South Shaw Lane (ORCID: http://orcid.org/0000-0003-1234-257X [K.E.C.]) and
| | - Kirk D Dolan
- 1 Department of Biosystems and Agricultural Engineering, 524 South Shaw Lane (ORCID: http://orcid.org/0000-0003-1234-257X [K.E.C.]) and.,2 Department of Food Science and Human Nutrition, 469 Wilson Road, Michigan State University, East Lansing, Michigan 48824 (ORCID: http://orcid.org/0000-0003-1337-2658 [E.T.R.]); and
| | - Elliot T Ryser
- 2 Department of Food Science and Human Nutrition, 469 Wilson Road, Michigan State University, East Lansing, Michigan 48824 (ORCID: http://orcid.org/0000-0003-1337-2658 [E.T.R.]); and
| | - Linda J Harris
- 3 Department of Food Science and Technology, University of California, Davis, 392 Old Davis Road, Davis, California 95616, USA (ORCID: http://orcid.org/0000-0002-1911-752X )
| | - Bradley P Marks
- 1 Department of Biosystems and Agricultural Engineering, 524 South Shaw Lane (ORCID: http://orcid.org/0000-0003-1234-257X [K.E.C.]) and.,2 Department of Food Science and Human Nutrition, 469 Wilson Road, Michigan State University, East Lansing, Michigan 48824 (ORCID: http://orcid.org/0000-0003-1337-2658 [E.T.R.]); and
| |
Collapse
|
31
|
Ban C, Lee DH, Jo Y, Bae H, Seong H, Kim SO, Lim S, Choi YJ. Use of superheated steam to inactivate Salmonella enterica serovars Typhimurium and Enteritidis contamination on black peppercorns, pecans, and almonds. J FOOD ENG 2018. [DOI: 10.1016/j.jfoodeng.2017.11.036] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
32
|
Schmidt M, Zannini E, Arendt EK. Recent Advances in Physical Post-Harvest Treatments for Shelf-Life Extension of Cereal Crops. Foods 2018; 7:E45. [PMID: 29565832 PMCID: PMC5920410 DOI: 10.3390/foods7040045] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 03/14/2018] [Accepted: 03/21/2018] [Indexed: 11/17/2022] Open
Abstract
As a result of the rapidly growing global population and limited agricultural area, sufficient supply of cereals for food and animal feed has become increasingly challenging. Consequently, it is essential to reduce pre- and post-harvest crop losses. Extensive research, featuring several physical treatments, has been conducted to improve cereal post-harvest preservation, leading to increased food safety and sustainability. Various pests can lead to post-harvest losses and grain quality deterioration. Microbial spoilage due to filamentous fungi and bacteria is one of the main reasons for post-harvest crop losses and mycotoxins can induce additional consumer health hazards. In particular, physical treatments have gained popularity making chemical additives unnecessary. Therefore, this review focuses on recent advances in physical treatments with potential applications for microbial post-harvest decontamination of cereals. The treatments discussed in this article were evaluated for their ability to inhibit spoilage microorganisms and degrade mycotoxins without compromising the grain quality. All treatments evaluated in this review have the potential to inhibit grain spoilage microorganisms. However, each method has some drawbacks, making industrial application difficult. Even under optimal processing conditions, it is unlikely that cereals can be decontaminated of all naturally occurring spoilage organisms with a single treatment. Therefore, future research should aim for the development of a combination of treatments to harness their synergistic properties and avoid grain quality deterioration. For the degradation of mycotoxins the same conclusion can be drawn. In addition, future research must investigate the fate of degraded toxins, to assess the toxicity of their respective degradation products.
Collapse
Affiliation(s)
- Marcus Schmidt
- School of Food and Nutritional Sciences, University College Cork, Western Road, T12 Y337 Cork, Ireland.
| | - Emanuele Zannini
- School of Food and Nutritional Sciences, University College Cork, Western Road, T12 Y337 Cork, Ireland.
| | - Elke K Arendt
- School of Food and Nutritional Sciences, University College Cork, Western Road, T12 Y337 Cork, Ireland.
- Alimentary Pharmabotic Centre Microbiome Institute, University College Cork, T12 Y337 Cork, Ireland.
| |
Collapse
|
33
|
Bezanson GS, Ells TC, Fan L, Forney CF, LeBlanc DI. Aerated Steam Sanitization of Whole Fresh Cantaloupes Reduces and Controls Rind-Associated Listeria but Enhances Fruit Susceptibility to Secondary Colonization. J Food Sci 2018; 83:1025-1031. [PMID: 29488631 DOI: 10.1111/1750-3841.14082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2017] [Revised: 01/10/2018] [Accepted: 01/19/2018] [Indexed: 11/26/2022]
Abstract
Recent bacterial illnesses and outbreaks associated with the consumption of fresh and fresh-cut fruit and vegetables emphasize the need to supply produce that is microbiologically safe while retaining its quality and nutrient value. We assessed the capacity of aerated steam to reduce initial levels and control the posttreatment proliferation of a 4-strain mixture of Listeria innocua, a surrogate for L. monocytogenes, and microflora native to the rind of whole cantaloupes. Studies were conducted at the pilot-scale level by passing deliberately contaminated melons through a prototype stainless-steel, continuous-feed heating device. Exposure for 240 s to aerated steam heated to 85 °C achieved a mean reduction in surface-inoculated L. innocua of 3.9 ± 0.6 log10 CFU/cm2 (n = 3) and decreased background microorganisms (yeast, moulds, and coliforms) to undetectable levels. No significant outgrowth of surviving L. innocua or yeast and moulds was observed on heat-treated melons during their storage at 4, 7, and 10 °C for 14 days. Treated fruit continued to respire. Although rind quality was altered, edible fleshy portions remained largely unaffected. Cantaloupe inoculated with L. innocua subsequent to its exposure to aerated steam provided a suitable environment for surrogate growth (mean 3.3 log10 increase in rind density over 10 days at 7 °C), whereas its proliferation was restricted on nonheated cantaloupe (mean 0.7 log10 increase). Steam sanitization provides an effective means for the control of pathogen and spoilage organisms, but the proliferation of surrogate organisms on heated cantaloupes raises concern regarding the impact of postprocessing contamination on consumer health risk. PRACTICAL APPLICATION Water vapor (steam) at a high temperature can be used to sanitize the surface of fresh, whole cantaloupe melons in a continuous-feed manner. Both Listeria bacteria and spoilage organisms are markedly reduced from initial levels and survivor outgrowth severely restricted during subsequent refrigerated storage. This approach to microorganism control is likely most applicable in situations where rinds and flesh are to be separated immediately via further processing.
Collapse
Affiliation(s)
- Greg S Bezanson
- Agriculture and AgriFood Canada, Kentville Research and Development Centre, 32 Main Street, Kentville, Nova Scotia, B4N 1J5, Canada
| | - Timothy C Ells
- Agriculture and AgriFood Canada, Kentville Research and Development Centre, 32 Main Street, Kentville, Nova Scotia, B4N 1J5, Canada
| | - Lihua Fan
- Agriculture and AgriFood Canada, Kentville Research and Development Centre, 32 Main Street, Kentville, Nova Scotia, B4N 1J5, Canada
| | - Charles F Forney
- Agriculture and AgriFood Canada, Kentville Research and Development Centre, 32 Main Street, Kentville, Nova Scotia, B4N 1J5, Canada
| | - Denyse I LeBlanc
- Agriculture and AgriFood Canada, Kentville Research and Development Centre, 32 Main Street, Kentville, Nova Scotia, B4N 1J5, Canada
| |
Collapse
|
34
|
Kwon SA, Song WJ, Kang DH. Comparison of the effect of saturated and superheated steam on the inactivation of Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes on cantaloupe and watermelon surfaces. Food Microbiol 2018; 72:157-165. [PMID: 29407392 DOI: 10.1016/j.fm.2017.10.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 09/21/2017] [Accepted: 10/26/2017] [Indexed: 11/25/2022]
Abstract
The purpose of this study was evaluation of the effectiveness of superheated steam (SHS) on inactivation of foodborne pathogens on cantaloupes and watermelons. Saturated steam (SS) treatment was performed at 100 °C and that of SHS at 150 and 200 °C. Escherichia coli O157:H7, Salmonella Typhimurium and Listeria monocytogenes-inoculated cantaloupes and watermelons were exposed for a maximum of 30 s and 10 s, respectively. Populations of the three pathogens on cantaloupes and watermelons were reduced by more than 5 log after 200 °C steam treatment for 30 s and 10 s, respectively. After SHS treatment of cantaloupes and watermelons for each maximum treatment time, color and maximum load values were not significantly different from those of untreated controls. By using a noncontact 3D surface profiler, we found that surface characteristics, especially surface roughness, is the main reason for differences in microbial inactivation between cantaloupes and watermelons. The results of this study suggest that SHS treatment can be used as an antimicrobial intervention for cantaloupes and watermelons without inducing quality deterioration.
Collapse
Affiliation(s)
- Sun-Ah Kwon
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute of Agricultural and Life Sciences, Seoul National University, Seoul, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, Republic of Korea
| | - Won-Jae Song
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute of Agricultural and Life Sciences, Seoul National University, Seoul, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, Republic of Korea
| | - Dong-Hyun Kang
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, Research Institute of Agricultural and Life Sciences, Seoul National University, Seoul, Republic of Korea; Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang-gun, Gangwon-do, Republic of Korea.
| |
Collapse
|
35
|
Shah MK, Asa G, Sherwood J, Graber K, Bergholz TM. Efficacy of vacuum steam pasteurization for inactivation of Salmonella PT 30, Escherichia coli O157:H7 and Enterococcus faecium on low moisture foods. Int J Food Microbiol 2017; 244:111-118. [DOI: 10.1016/j.ijfoodmicro.2017.01.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2016] [Revised: 12/21/2016] [Accepted: 01/06/2017] [Indexed: 11/30/2022]
|