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Martins WF, Severo DDS, Longhi DA, de Aragão GMF. Comparison of SYBR® Green qPCR assay and plate count method to describe growth of Weissella viridescens and Leuconostoc mesenteroides in pure and mixed cultivation. Food Microbiol 2024; 119:104452. [PMID: 38225053 DOI: 10.1016/j.fm.2023.104452] [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: 06/15/2023] [Revised: 11/28/2023] [Accepted: 12/18/2023] [Indexed: 01/17/2024]
Abstract
The current study was conducted to statistically compare the SYBR® Green quantitative polymerase chain reaction (qPCR) assay and the conventional plate counting (PC) method to construct growth curves of a cocktail of Weissella viridescens in pure culture under different isothermal storage conditions (4, 8, 14, and 30 °C) and in mixed culture with Leuconostoc mesenteroides at 8 °C. The efficiency and specificity of the qPCR standard curves were confirmed, and both methods were adequate to quantify the growth kinetics of W. viridescens at all isothermal temperatures, demonstrating a good correlation and agreement. The efficiencies of the standard curves varied between 98% and 102%. The SYBR® Green qPCR assay was also able to differentiate the growth curves of W. viridescens and L. mesenteroides in the mixed culture at 8 °C. Additionally, the SYBR® Green qPCR method was considered a faster and more sensitive alternative to construct growth curves under different isothermal conditions and differentiate morphologically similar lactic acid bacteria. Overall, the results suggest that the SYBR® Green qPCR method is a reliable and efficient tool to study microbial growth kinetics in pure and mixed cultures.
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Affiliation(s)
- Wiaslan Figueiredo Martins
- Department of Food Technology, Goiano Federal Institute of Education, Science, and Technology, IF Goiano/Morrinhos Campus, Zip Code 75650-000, Morrinhos, GO, Brazil; Chemical and Food Engineering Department, Federal University of Santa Catarina, EQA/UFSC, Zip Code 88040-900, Florianopolis, SC, Brazil.
| | - Danielle de Sousa Severo
- Chemical and Food Engineering Department, Federal University of Santa Catarina, EQA/UFSC, Zip Code 88040-900, Florianopolis, SC, Brazil
| | - Daniel Angelo Longhi
- LaBeM - Laboratory of Bioactives and Microbiology, School of Food Engineering, Federal University of Paraná, UFPR/Jandaia do Sul Campus, Zip Code 86900-000, Jandaia do Sul, PR, Brazil
| | - Gláucia Maria Falcão de Aragão
- Chemical and Food Engineering Department, Federal University of Santa Catarina, EQA/UFSC, Zip Code 88040-900, Florianopolis, SC, Brazil
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The Antimicrobial Effect of Various Single-Strain and Multi-Strain Probiotics, Dietary Supplements or Other Beneficial Microbes against Common Clinical Wound Pathogens. Microorganisms 2022; 10:microorganisms10122518. [PMID: 36557771 PMCID: PMC9781324 DOI: 10.3390/microorganisms10122518] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 12/09/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022] Open
Abstract
The skin is the largest organ in the human body and is colonized by a diverse microbiota that works in harmony to protect the skin. However, when skin damage occurs, the skin microbiota is also disrupted, and pathogens can invade the wound and cause infection. Probiotics or other beneficial microbes and their metabolites are one possible alternative treatment for combating skin pathogens via their antimicrobial effectiveness. The objective of our study was to evaluate the antimicrobial effect of seven multi-strain dietary supplements and eleven single-strain microbes that contain probiotics against 15 clinical wound pathogens using the agar spot assay, co-culturing assay, and agar well diffusion assay. We also conducted genera-specific and species-specific molecular methods to detect the DNA in the dietary supplements and single-strain beneficial microbes. We found that the multi-strain dietary supplements exhibited a statistically significant higher antagonistic effect against the challenge wound pathogens than the single-strain microbes and that lactobacilli-containing dietary supplements and single-strain microbes were significantly more efficient than the selected propionibacteria and bacilli. Differences in results between methods were also observed, possibly due to different mechanisms of action. Individual pathogens were susceptible to different dietary supplements or single-strain microbes. Perhaps an individual approach such as a 'probiogram' could be a possibility in the future as a method to find the most efficient targeted probiotic strains, cell-free supernatants, or neutralized cell-free supernatants that have the highest antagonistic effect against individual clinical wound pathogens.
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Kim E, Kim DS, Yang SM, Kim HY. The accurate identification and quantification of six Enterococcus species using quantitative polymerase chain reaction based novel DNA markers. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2022.113769] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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Distribution of Lactobacillus species in Iranian women with both human papillomavirus (HPV) infection and bacterial vaginosis (BV). Meta Gene 2020. [DOI: 10.1016/j.mgene.2020.100791] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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Verruck S, Silva KJ, de Oliveira Santeli H, Scariot MC, Venturelli GL, Prudencio ES, Arisi ACM. Bifidobacterium animalis ssp. lactis BB-12 enumeration by quantitative PCR assay in microcapsules with full-fat goat milk and inulin-type fructans. Food Res Int 2020; 133:109131. [PMID: 32466908 DOI: 10.1016/j.foodres.2020.109131] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 02/25/2020] [Accepted: 02/26/2020] [Indexed: 12/16/2022]
Abstract
The current study was conducted to develop a quantitative polymerase chain reaction (qPCR) assay for Bifidobacterium animalis ssp. lactis BB-12 quantification in microcapsules matrix with full-fat goat milk and inulin-type fructans. DNA was isolated from milk, feed solutions (before spray drying) and microcapsules (after spray drying) using DNAzol. Two primer pairs targeting Bal-23S or Tuf sequences were evaluated by qPCR. The qPCR efficiency was higher (89.5%) using the Tuf primers than Bal-23S primers (84.8%). Tuf primer pair was able to selectively detect B. animalis ssp. lactis BB-12. After, quantification of bifidobacteria in the microcapsules matrix by Tuf qPCR assay was compared to conventional enumeration by plate counting. The analysis of probiotic feed solutions and microcapsules showed higher (P < 0.05) bacterial enumeration determined by Tuf qPCR assay compared to those obtained by plate counting. This qPCR assay was considered a rapid and sensitive alternative for the quantification of B. animalis ssp. lactis BB-12 in probiotic microcapsules compared to plate counting.
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Affiliation(s)
- Silvani Verruck
- Dairy Technology Laboratory, Food Science and Technology Department, Agrarian Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, Itacorubi, 88034-001 Florianópolis, SC, Brazil
| | - Kelly Justin Silva
- Molecular Biology Laboratory, Food Science and Technology Department, Agrarian Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, Itacorubi, 88034-001 Florianópolis, SC, Brazil
| | - Helena de Oliveira Santeli
- Molecular Biology Laboratory, Food Science and Technology Department, Agrarian Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, Itacorubi, 88034-001 Florianópolis, SC, Brazil
| | - Mirella Christine Scariot
- Molecular Biology Laboratory, Food Science and Technology Department, Agrarian Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, Itacorubi, 88034-001 Florianópolis, SC, Brazil
| | - Gustavo Luiz Venturelli
- Molecular Biology Laboratory, Food Science and Technology Department, Agrarian Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, Itacorubi, 88034-001 Florianópolis, SC, Brazil
| | - Elane Schwinden Prudencio
- Dairy Technology Laboratory, Food Science and Technology Department, Agrarian Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, Itacorubi, 88034-001 Florianópolis, SC, Brazil
| | - Ana Carolina Maisonnave Arisi
- Molecular Biology Laboratory, Food Science and Technology Department, Agrarian Science Center, Federal University of Santa Catarina, Rod. Admar Gonzaga, 1346, Itacorubi, 88034-001 Florianópolis, SC, Brazil.
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Shakeri MS, Shahidi F, Mortazavi A, Bahrami AR, Nassiri MR. Combination of competitive PCR and cultivation methods for differential enumeration of viable Lactobacillus acidophilus
in bio-yoghurts. INT J DAIRY TECHNOL 2018. [DOI: 10.1111/1471-0307.12536] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Monir-Sadat Shakeri
- Department of Food Biotechnology; Research Institute of Food Science and Technology; Mashhad Iran
| | - Fakhri Shahidi
- Department of Food Science and Technology; Faculty of Agriculture; Mashhad Iran
| | - Ali Mortazavi
- Department of Food Science and Technology; Faculty of Agriculture; Mashhad Iran
| | - Ahmad Reza Bahrami
- Cellular and Molecular Research Group; Institute of Biotechnology; Ferdowsi University of Mashhad; Mashhad Iran
| | - Mohammad Reza Nassiri
- Department of Animal Science; Faculty of Agriculture; Ferdowsi University of Mashhad; Mashhad Iran
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Gobert G, Cotillard A, Fourmestraux C, Pruvost L, Miguet J, Boyer M. Droplet digital PCR improves absolute quantification of viable lactic acid bacteria in faecal samples. J Microbiol Methods 2018; 148:64-73. [DOI: 10.1016/j.mimet.2018.03.004] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 03/12/2018] [Accepted: 03/12/2018] [Indexed: 02/06/2023]
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Oketič K, Matijašić BB, Obermajer T, Radulović Z, Lević S, Mirković N, Nedović V. Evaluation of propidium monoazide real-time PCR for enumeration of probiotic lactobacilli microencapsulated in calcium alginate beads. Benef Microbes 2015; 6:573-81. [DOI: 10.3920/bm2014.0095] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The aim of the study was to evaluate real-time PCR coupled with propidium monoazide (PMA) treatment for enumeration of microencapsulated probiotic lactobacilli microencapsulated in calcium alginate beads. Lactobacillus gasseri K7 (CCM 7710) and Lactobacillus delbrueckii subsp. bulgaricus (CCM 7712) were analysed by plate counting and PMA real-time PCR during storage at 4 °C for 90 days. PMA was effective in preventing PCR amplification of the target sequences of DNA released from heat-compromised bacteria. The values obtained by real-time PCR of non-treated samples were in general higher than those obtained by real-time PCR of PMA-treated samples or by plate counting, indicating the presence of sub-lethally injured cells. This study shows that plate count could not be completely replaced by culture independent method PMA real-time PCR for enumeration of probiotics, but may rather complement the well-established plate counting, providing useful information about the ratio of compromised bacteria in the samples.
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Affiliation(s)
- K. Oketič
- University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Institute of Dairy Science and Probiotics, Groblje 3, 1230 Domžale, Slovenia
| | - B. Bogovič Matijašić
- University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Institute of Dairy Science and Probiotics, Groblje 3, 1230 Domžale, Slovenia
| | - T. Obermajer
- University of Ljubljana, Biotechnical Faculty, Department of Animal Science, Institute of Dairy Science and Probiotics, Groblje 3, 1230 Domžale, Slovenia
| | - Z. Radulović
- University of Belgrade, Faculty of Agriculture, Department of Food Technology, Nemanjina 6, 11080 Belgrade, Serbia
| | - S. Lević
- University of Belgrade, Faculty of Agriculture, Department of Food Technology, Nemanjina 6, 11080 Belgrade, Serbia
| | - N. Mirković
- University of Belgrade, Faculty of Agriculture, Department of Food Technology, Nemanjina 6, 11080 Belgrade, Serbia
| | - V. Nedović
- University of Belgrade, Faculty of Agriculture, Department of Food Technology, Nemanjina 6, 11080 Belgrade, Serbia
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Selection of potential probiotic Enterococcus faecium isolated from Portuguese fermented food. Int J Food Microbiol 2014; 191:144-8. [PMID: 25268323 DOI: 10.1016/j.ijfoodmicro.2014.09.009] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 08/28/2014] [Accepted: 09/14/2014] [Indexed: 11/24/2022]
Abstract
Four Enterococcus faecium strains isolated from fermented products were evaluated for potential use as probiotic strains. In addition to efaAfm gene, commonly found in E. faecium food isolates, none of the isolates possessed virulence genes and none had positive reactions for the production of tyramine, histamine, putrescine and cadaverine in the screening medium used. All of these four isolates proved to be resistant to 65 °C. E. faecium 119 did not show antimicrobial activity against any of the target bacteria investigated. E. faecium 85 and 101 inhibited Listeria innocua and E. faecium DSMZ 13590. The strain E. faecium 120 inhibited seven target bacteria (Listeria monocytogenes 7946, L. monocytogenes 7947, L. innocua 2030c, L. innocua NCTC 11286, E. faecium DSMZ 13590, Enterococcus faecalis ATCC 29212 and Staphylococcus aureus ATCC 29213) and was chosen as the representative to assess the ability to survive gastrointestinal tract passage simulation, as well as the protective role of two food matrices (skim milk and Alheira) during its passage. For both matrices used, no significant differences (p<0.05) were obtained between the types of digestion - quick and slow passage simulation. In the skim milk matrix the isolate was reduced to values below the detection limit of the enumeration technique by the end of the two digestions, in contrast to the Alheira matrix, for which isolate 120 showed a reduction of only ca. 1 log CFU/ml. The E. faecium strain 120 was shown to be a potential candidate for further investigations as a potential probiotic culture.
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Davis C. Enumeration of probiotic strains: Review of culture-dependent and alternative techniques to quantify viable bacteria. J Microbiol Methods 2014; 103:9-17. [DOI: 10.1016/j.mimet.2014.04.012] [Citation(s) in RCA: 174] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2014] [Revised: 04/29/2014] [Accepted: 04/29/2014] [Indexed: 02/09/2023]
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Costa GN, Marcelino-Guimarães FC, Vilas-Bôas GT, Matsuo T, Miglioranza LHS. Potential fate of ingested Lactobacillus plantarum and its occurrence in human feces. Appl Environ Microbiol 2014; 80:1013-9. [PMID: 24271176 PMCID: PMC3911214 DOI: 10.1128/aem.02588-13] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 11/19/2013] [Indexed: 12/26/2022] Open
Abstract
Lactobacillus plantarum has been used in human clinical trials to promote beneficial effects in the immune system, to alleviate intestinal disorders, and to reduce the risk of cardiovascular disease. It is also involved in many fermentation processes in the food industry. However, information on the fate of ingested L. plantarum is limited. In this study, 61 subjects received daily doses of fermented milk containing 2 × 10(11) cells of L. plantarum Lp115 for different periods of time. The target microorganism was monitored in the fecal microbiota via quantitative PCR (qPCR). L. plantarum was detected and quantified in all of the subjects during the ingestion periods. The differences between the L. plantarum levels at time zero and during all the different ingestion periods were statistically significant (P = 0.001). However, at 15 and 45 days after discontinuing supplementation, the number of lactobacilli was reduced to the baseline level (those at time zero). A longer period with L. plantarum in the diet did not result in increased levels of this bacterium in the stool, based on postconsumption evaluations (P = 0.001). The qPCR method was specific and sensitive for L. plantarum quantification in such a complex microbial environment as the gastrointestinal tract.
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Affiliation(s)
- Giselle Nobre Costa
- Departamento de Ciência e Tecnologia de Alimentos, Universidade Estadual de Londrina, Londrina, PR, Brazil
- Mestrado em Ciência e Tecnologia do Leite e Derivados, Universidade Norte do Paraná, Londrina, PR, Brazil
| | | | | | - Tiemi Matsuo
- Departamento de Matemática e Estatística Aplicada, Universidade Estadual de Londrina, Londrina, PR, Brazil
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Rittich B, Španová A. SPE and purification of DNA using magnetic particles. J Sep Sci 2013; 36:2472-85. [DOI: 10.1002/jssc.201300331] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 05/13/2013] [Accepted: 05/13/2013] [Indexed: 12/21/2022]
Affiliation(s)
- Bohuslav Rittich
- Faculty of Chemistry; Brno University of Technology; Brno Czech Republic
| | - Alena Španová
- Faculty of Chemistry; Brno University of Technology; Brno Czech Republic
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Fonseca S, Cachaldora A, Gómez M, Franco I, Carballo J. Monitoring the bacterial population dynamics during the ripening of Galician chorizo, a traditional dry fermented Spanish sausage. Food Microbiol 2013; 33:77-84. [DOI: 10.1016/j.fm.2012.08.015] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2012] [Revised: 08/07/2012] [Accepted: 08/31/2012] [Indexed: 10/27/2022]
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