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Bi K, Liu Y, Xin W, Yang J, Zhang B, Zhang Z. Combined treatment of ε-polylysine and heat damages protective structures and spore inner membranes to inactivate Bacillus subtilis spores. Food Microbiol 2023; 109:104137. [DOI: 10.1016/j.fm.2022.104137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Revised: 09/05/2022] [Accepted: 09/05/2022] [Indexed: 11/25/2022]
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Ramírez R, Garrido M, Rocha-Pimienta J, García-Parra J, Delgado-Adámez J. Immunological components and antioxidant activity in human milk processed by different high pressure-thermal treatments at low initial temperature and flash holding times. Food Chem 2020; 343:128546. [PMID: 33214041 DOI: 10.1016/j.foodchem.2020.128546] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 10/21/2020] [Accepted: 10/31/2020] [Indexed: 01/02/2023]
Abstract
The effect of high pressure thermal (HPT) processing on the immunoglobulin (IgM, IgA and IgG), and cytokine content (IL-6, IL-8, IL-10, and TNF-α), and antioxidant activity of human milk was analyzed after the application of different treatments between 200, and 800 MPa at low initial temperatures (between -15, and 50 °C) and for 1 s (flash treatments). Low pressures intensities did not induce changes in Igs while at 800 MPa, all combinations reduced the control levels. IL-6 and IL-10 were not affected by any of the treatments applied while IL-8 and TNF-α were reduced at treatments which combined temperatures at 50 °C. In general antioxidant activity was not affected at the processing conditions chosen. The flash HPT treatment applied at 600 MPa and at 0 °C could be the best choice to preserve immunological parameters and the antioxidant activity of human milk.
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Affiliation(s)
- Rosario Ramírez
- Technological Agri-food Institute (INTAEX), Centro de Investigaciones Científicas y Tecnológicas de Extremadura (CICYTEX), Badajoz, Spain
| | - María Garrido
- Department of Physiology (Neuroimmunophysiology and Chrononutrition Research Group), Faculty of Science, University of Extremadura, Badajoz, Spain
| | - Javier Rocha-Pimienta
- Technological Agri-food Institute (INTAEX), Centro de Investigaciones Científicas y Tecnológicas de Extremadura (CICYTEX), Badajoz, Spain
| | - Jesús García-Parra
- Technological Agri-food Institute (INTAEX), Centro de Investigaciones Científicas y Tecnológicas de Extremadura (CICYTEX), Badajoz, Spain
| | - Jonathan Delgado-Adámez
- Technological Agri-food Institute (INTAEX), Centro de Investigaciones Científicas y Tecnológicas de Extremadura (CICYTEX), Badajoz, Spain.
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Hauck-Tiburski J, Rosenthal A, Iaconnelli C, Perrier-Cornet JM, Gervais P. Inactivation of dried spores of Bacillus subtilis 168 by a treatment combining high temperature and pressure. Int J Food Microbiol 2019; 295:1-7. [DOI: 10.1016/j.ijfoodmicro.2019.01.017] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 01/21/2019] [Accepted: 01/26/2019] [Indexed: 10/27/2022]
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4
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Huang Y, Ye XP, Doona CJ, Feeherry FE, Radosevich M, Wang S. An investigation of inactivation mechanisms of Bacillus amyloliquefaciens spores in non-thermal plasma of ambient air. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2019; 99:368-378. [PMID: 29888388 DOI: 10.1002/jsfa.9198] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 04/24/2018] [Accepted: 06/07/2018] [Indexed: 06/08/2023]
Abstract
BACKGROUND To utilize the potential of non-thermal plasma technologies for food safety control and sanitation, the inactivation mechanisms of Bacillus amyloliquefaciens spores by non-thermal plasma of ambient air (NTP-AA) were investigated using scanning electron microscopy, atomic force microscopy, attenuated total reflectance Fourier transform infrared spectroscopy with chemometric analysis and proton nuclear magnetic resonance spectroscopy, aiming to probe both the morphological and biochemical changes occurring in spores during the kinetic inactivation process. RESULTS Kinetic analysis indicates that there is no intrinsic D-value (i.e. time required to inactivate 90% of the spores) in spore inactivation by NTP-AA because we observed non-linear (biphasic) inactivation kinetics and, in addition, the inactivation rate depended on the initial spore concentration and how the spores were exposed to the reactive species in the NTP-AA. The presence of suitable amount of water in the NTP-AA field accelerates spore inactivation. CONCLUSION Progressive erosion of spore surface by NTP-AA with ensuing or concomitant biochemical damage, which includes the alteration of structural proteins, internal lipids and the loss of dipicolinic acid content from the spore core, represent the main mechanisms of inactivation, and there is evidence that reactive NTP-AA species could penetrate the cortex and reach the core of spores to cause damage. © 2018 Society of Chemical Industry.
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Affiliation(s)
- Yaohua Huang
- Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN, USA
| | - Xiaofei P Ye
- Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN, USA
| | | | | | - Mark Radosevich
- Department of Biosystems Engineering and Soil Science, The University of Tennessee, Knoxville, TN, USA
| | - Siqun Wang
- Center for Renewable Carbon, The University of Tennessee, Knoxville, TN, USA
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Wang BS, Li BS, Du JZ, Zeng QX. Combined pressure-thermal inactivation effect on spores in lu-wei beef - a traditional Chinese meat product. J Appl Microbiol 2015; 119:446-54. [DOI: 10.1111/jam.12841] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Revised: 05/03/2015] [Accepted: 05/04/2015] [Indexed: 11/30/2022]
Affiliation(s)
- B.-S. Wang
- School of Chemistry and Chemical Engineering; Lingnan Normal University; ZhanJiang Guangdong China
| | - B.-S. Li
- College of Light Industry and Food Sciences; South China University of Technology; Guangzhou Guangdong China
| | - J.-Z. Du
- School of Chemistry and Chemical Engineering; Lingnan Normal University; ZhanJiang Guangdong China
| | - Q.-X. Zeng
- College of Light Industry and Food Sciences; South China University of Technology; Guangzhou Guangdong China
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Noell AC, Ely T, Bolser DK, Darrach H, Hodyss R, Johnson PV, Hein JD, Ponce A. Spectroscopy and viability of Bacillus subtilis spores after ultraviolet irradiation: implications for the detection of potential bacterial life on Europa. ASTROBIOLOGY 2015; 15:20-31. [PMID: 25590531 DOI: 10.1089/ast.2014.1169] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
One of the most habitable environments in the Solar System outside of Earth may exist underneath the ice on Europa. In the near future, our best chance to look for chemical signatures of a habitable environment (or life itself) will likely be at the inhospitable icy surface. Therefore, it is important to understand the ability of organic signatures of life and life itself to persist under simulated europan surface conditions. Toward that end, this work examined the UV photolysis of Bacillus subtilis spores and their chemical marker dipicolinic acid (DPA) at temperatures and pressures relevant to Europa. In addition, inactivation curves for the spores at 100 K, 100 K covered in one micron of ice, and 298 K were measured to determine the probability for spore survival at the surface. Fourier transform infrared spectra of irradiated DPA showed a loss of carboxyl groups to CO2 as expected but unexpectedly showed significant opening of the heterocyclic ring, even for wavelengths>200 nm. Both DPA and B. subtilis spores showed identical unknown spectral bands of photoproducts after irradiation, further highlighting the importance of DPA in the photochemistry of spores. Spore survival was enhanced at 100 K by ∼5× relative to 298 K, but 99.9% of spores were still inactivated after the equivalent of ∼25 h of exposure on the europan surface.
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Affiliation(s)
- Aaron C Noell
- NASA Astrobiology Institute and Jet Propulsion Laboratory, California Institute of Technology , Pasadena, California
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García-Parra J, González-Cebrino F, Cava R, Ramírez R. Effect of a different high pressure thermal processing compared to a traditional thermal treatment on a red flesh and peel plum purée. INNOV FOOD SCI EMERG 2014. [DOI: 10.1016/j.ifset.2014.08.002] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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In situ investigation of Geobacillus stearothermophilus spore germination and inactivation mechanisms under moderate high pressure. Food Microbiol 2014; 41:8-18. [DOI: 10.1016/j.fm.2014.01.007] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2013] [Revised: 11/21/2013] [Accepted: 01/10/2014] [Indexed: 01/18/2023]
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Prediction of Injured and Dead Inactivated Escherichia coli O157:H7 Cells after Heat and Pulsed Electric Field Treatment with Attenuated Total Reflectance Infrared Microspectroscopy Combined with Multivariate Analysis Technique. FOOD BIOPROCESS TECH 2013. [DOI: 10.1007/s11947-013-1195-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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10
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Tiburski JH, Rosenthal A, Guyot S, Perrier-Cornet JM, Gervais P. Water Distribution in Bacterial Spores: A Key Factor in Heat Resistance. FOOD BIOPHYS 2013. [DOI: 10.1007/s11483-013-9312-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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DE LAMO-CASTELLVÍ S, RODRÍGUEZ-SAONA L. USE OF ATTENUATED TOTAL REFLECTANCE INFRARED MICROSPECTROSCOPY TO DISCRIMINATE BACILLUS SPORES. J Food Saf 2011. [DOI: 10.1111/j.1745-4565.2011.00313.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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12
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Lu X, Liu Q, Wu D, Al-Qadiri HM, Al-Alami NI, Kang DH, Shin JH, Tang J, Jabal JM, Aston ED, Rasco BA. Using of infrared spectroscopy to study the survival and injury of Escherichia coli O157:H7, Campylobacter jejuni and Pseudomonas aeruginosa under cold stress in low nutrient media. Food Microbiol 2011; 28:537-46. [DOI: 10.1016/j.fm.2010.11.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Revised: 10/31/2010] [Accepted: 11/02/2010] [Indexed: 11/30/2022]
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Alvarez-Ordóñez A, Mouwen DJM, López M, Prieto M. Fourier transform infrared spectroscopy as a tool to characterize molecular composition and stress response in foodborne pathogenic bacteria. J Microbiol Methods 2011; 84:369-78. [PMID: 21256893 DOI: 10.1016/j.mimet.2011.01.009] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2010] [Accepted: 01/11/2011] [Indexed: 10/18/2022]
Abstract
Vibrational spectroscopy techniques have shown capacity to provide non-destructive, rapid, relevant information on microbial systematics, useful for classification and identification. Infrared spectroscopy enables the biochemical signatures from microbiological structures to be extracted and analyzed, in conjunction with advanced chemometrics. In addition, a number of recent studies have shown that Fourier Transform Infrared (FT-IR) spectroscopy can help understand the molecular basis of events such as the adaptive tolerance responses expressed by bacteria when exposed to stress conditions in the environment (e.g. those that cells confront in food and during food processing). The current review gives an overview of the published experimental techniques, data-processing algorithms and approaches used in FT-IR spectroscopy to assess the mechanisms of bacterial inactivation by food processing technologies and antimicrobial compounds, to monitor the spore and membrane properties of foodborne pathogens in changing environments, to detect stress-injured microorganisms in food-related environments, to assess dynamic changes in bacterial populations, and to study bacterial tolerance responses.
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Seale RB, Bremer PJ, Flint SH, McQuillan AJ. Characterization of spore surfaces from a Geobacillus sp. isolate by pH dependence of surface charge and infrared spectra. J Appl Microbiol 2010; 109:1339-48. [PMID: 20522147 DOI: 10.1111/j.1365-2672.2010.04760.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
AIMS The surfaces of spores from a Geobacillus sp. isolated from a milk powder production line were examined to obtain fundamental information relevant to bacterial spore adhesion to materials. MATERIALS AND RESULTS The surfaces of spores were characterized using transmission electron microscopy and infrared spectroscopy. Thin sections of spores stained with ruthenium red revealed an exosporium with a hair-like nap around the spores. Attenuated total reflection infrared spectra of the spores exposed to different pH solutions on a ZnSe prism revealed that pH-sensitive carboxyl and phosphodiester groups associated with proteins and polysaccharides contributed to the spore's negative charge which was revealed by our previous zeta potential measurements on the spores. Lowering the pH to the isoelectric point of spores resulted in an increase in intensity of all spectral bands, indicating that the spores moved closer to the zinc selenide (ZnSe) surface as the charged surface groups were neutralized and the spore surface polymers compressed. The attachment of spores to stainless steel was threefold higher at pH 3 compared with pH 7. CONCLUSIONS This research showed that spore attachment to surfaces is influenced by electrostatic interactions, surface polymer conformation and associated steric interactions. SIGNIFICANCE AND IMPACT OF THE STUDY The adhesion of thermophilic spores is largely controlled by functional groups of surface polymers and polymer conformation.
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Affiliation(s)
- R B Seale
- Department of Food Science, University of Otago, Dunedin, New Zealand
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Chaves-López C, Lanciotti R, Serio A, Paparella A, Guerzoni E, Suzzi G. Effect of high pressure homogenization applied individually or in combination with other mild physical or chemical stresses on Bacillus cereus and Bacillus subtilis spore viability. Food Control 2009. [DOI: 10.1016/j.foodcont.2008.09.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Samuels AC, Snyder AP, Emge DK, Amant D, Minter J, Campbell M, Tripathi A. Classification of select category A and B bacteria by Fourier transform infrared spectroscopy. APPLIED SPECTROSCOPY 2009; 63:14-24. [PMID: 19146715 DOI: 10.1366/000370209787169867] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Fourier transform infrared (FT-IR) spectroscopy historically is a powerful tool for the taxonomic classification of bacteria by genus, species, and strain when they are grown under carefully controlled conditions. Relatively few reports have investigated the determination and classification of pathogens such as the National Institute of Allergy and Infectious Diseases (NIAID) Category A Bacillus anthracis spores and cells (BA), Yersinia species, Francisella tularensis (FT), and Category B Brucella species from FT-IR spectra. We investigated the multivariate statistics classification ability of the FT-IR spectra of viable pathogenic and non-pathogenic NIAID Category A and B bacteria. The impact of different growth media, growth time and temperature, rolling circle filter of the data, and wavelength range were investigated for their microorganism differentiation capability. Viability of the bacteria was confirmed by agar plate growth after the FT-IR experimental procedures were performed. Principal component analysis (PCA) was reduced to maps of two PC vectors in order to distill the FT-IR spectral features into manageable, visual presentations. The PCA results of the strains of BA, FT, Brucella, and Yersinia spectra from conditions of varying growth media and culture time were readily separable in two-dimensional (2D) PC plots. FT spectra were separated from those of the three other genera. The BA pathogenic spore strains 1029, LA1, and Ames were clearly differentiated from the rest of the dataset. Yersinia rhodei, Y. enterocolitica, and Y. pestis species were distinctly separated from the remaining dataset and could also be classified by growth media. Different growth media produced distinct subsets in the FT, BA, and Yersinia spp. regions in the 2D PC plots. Various 2D PC plots provided differential degrees of separation with respect to the four viable bacterial genera including the BA sub-categories of pathogenic spores, vegetative cells, and nonpathogenic vegetative cells. This work provided evidence that FT-IR spectroscopy can indeed separate the four major pathogenic bacterial genera of NIAID Category A and B biological threat agents including details according to the growth conditions and statistical parameters.
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Affiliation(s)
- Alan C Samuels
- ECBC, Research and Technology Directorate, Edgewood Area, Aberdeen Proving Ground, Maryland 21010-5424, USA
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Subramanian A, Ahn J, Balasubramaniam VM, Rodriguez-Saona L. Monitoring biochemical changes in bacterial spore during thermal and pressure-assisted thermal processing using FT-IR spectroscopy. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:9311-7. [PMID: 17907780 DOI: 10.1021/jf0708241] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/15/2023]
Abstract
Pressure-assisted thermal processing (PATP) is being widely investigated for processing low acid foods. However, its microbial safety has not been well established and the mechanism of inactivation of pathogens and spores is not well understood. Fourier transform infrared (FT-IR) spectroscopy was used to study some of the biochemical changes in bacterial spores occurring during PATP and thermal processing (TP). Spore suspensions (approximately 10(9) CFU/mL of water) of Clostridium tyrobutyricum, Bacillus sphaericus, and three strains of Bacillus amyloliquefaciens were treated by PATP (121 degrees C and 700 MPa) for 0, 10, 20, and 30 s and TP (121 degrees C) for 0, 10, 20, and 30 s. Treated and untreated spore suspensions were analyzed using FT-IR in the mid-infrared region (4000-800 cm(-1)). Multivariate classification models based on soft independent modeling of class analogy (SIMCA) were developed using second derivative-transformed spectra. The spores could be differentiated up to the strain level due to differences in their biochemical composition, especially dipicolinic acid (DPA) and secondary structure of proteins. During PATP changes in alpha-helix and beta-sheets of secondary protein were evident in the spectral regions 1655 and 1626 cm(-1), respectively. Infrared absorption bands from DPA (1281, 1378, 1440, and 1568 cm(-1)) decreased significantly during the initial stages of PATP, indicating release of DPA. During TP changes were evident in the bands associated with secondary proteins. DPA bands showed little or no change during TP. A correlation was found between the spore's Ca-DPA content and its resistance to PATP. FT-IR spectroscopy could classify different strains of bacterial spores and determine some of the changes occurring during spore inactivation by PATP and TP. Furthermore, this technique shows great promise for rapid screening PATP-resistant bacterial spores.
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Affiliation(s)
- Anand Subramanian
- Department of Food Science and Technology, Ohio State University, 2015 Fyffe Court, Columbus, Ohio 43210, USA
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