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Todaro M, Garofalo G, Busetta G, Gannuscio R, Di Rosa AR, Scatassa ML, Cardamone C, Mancuso I, Franciosi E, Rando F, Agnolucci M, Chiofalo V, Gaglio R, Settanni L. Reduction of PDO Pecorino Siciliano cheese making duration: Microbial dynamics and quality attributes deriving from replacing whey permeate with hot water during cooking. Int J Food Microbiol 2024; 410:110481. [PMID: 37977081 DOI: 10.1016/j.ijfoodmicro.2023.110481] [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: 07/26/2023] [Revised: 11/04/2023] [Accepted: 11/05/2023] [Indexed: 11/19/2023]
Abstract
This work was carried out with the aim to reduce the transformation duration of Protected Designation of Origin (PDO) Pecorino Siciliano cheese. To this purpose, the cooking in hot water (experimental production, EXP) was compared to the traditional cheese cooking under whey permeate (control production, CTR). The microbiological composition of under rind (UR) and core (Co) section of CTR and EXP cheeses was determined by a combined culture-dependent and -independent approach. Total mesophilic microorganisms and lactic acid bacteria (LAB) present in raw ewes' milk (5.0 log CFU/mL) increased during cheese making and reached values of about 8.0 log CFU/g in both sections (UR and Co) of 5-month ripened cheeses of both productions (CTR and EXP) monitored. The identification of the viable LAB populations in ripened cheeses showed that Enterococcus, Lacticaseibacillus, Lactiplantibacillus, Levilactobacillus, Limosilactobacillus and Streptococcus dominated UR and Co sections of all cheeses. MiSeq Illumina analysis demonstrated that LAB populations (lactobacilli, lactococci and streptococci) dominated the bacterial community of cheeses at 95.63-98.41 % of relative abundance. The two different cooking operations did not influence the physicochemical characteristics of PDO Pecorino Siciliano cheeses. Sensory evaluation performed by artificial senses analysis and trained panelists confirmed that the modification of PDO Pecorino Siciliano cheese production protocol did not significantly affect product characteristics and overall acceptance. Thus, data of this work confirmed that cooking under hot water allowed to reduce transformation duration and safeguard typicality of PDO Pecorino Siciliano cheese.
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Affiliation(s)
- Massimo Todaro
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg. 5, 90128 Palermo, Italy
| | - Giuliana Garofalo
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg. 5, 90128 Palermo, Italy
| | - Gabriele Busetta
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg. 5, 90128 Palermo, Italy
| | - Riccardo Gannuscio
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg. 5, 90128 Palermo, Italy
| | - Ambra Rita Di Rosa
- Department of Veterinary Sciences, University of Messina, 98168 Messina, Italy
| | - Maria Luisa Scatassa
- Institute for Experimental Veterinary Medicine of Sicily A. Mirri, 90129 Palermo, Italy
| | - Cinzia Cardamone
- Institute for Experimental Veterinary Medicine of Sicily A. Mirri, 90129 Palermo, Italy
| | - Isabella Mancuso
- Institute for Experimental Veterinary Medicine of Sicily A. Mirri, 90129 Palermo, Italy
| | - Elena Franciosi
- Research and Innovation Centre, Fondazione Edmund Mach (FEM), Via E. Mach 1, 38098 San Michele all'Adige, Italy
| | - Fatima Rando
- Institute for Experimental Veterinary Medicine of Sicily A. Mirri, 90129 Palermo, Italy; Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, Pisa 56124, Italy
| | - Monica Agnolucci
- Department of Agriculture, Food and Environment, University of Pisa, Via del Borghetto 80, Pisa 56124, Italy
| | - Vincenzo Chiofalo
- Department of Veterinary Sciences, University of Messina, 98168 Messina, Italy
| | - Raimondo Gaglio
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg. 5, 90128 Palermo, Italy.
| | - Luca Settanni
- Department of Agricultural, Food and Forest Sciences, University of Palermo, Viale delle Scienze, Bldg. 5, 90128 Palermo, Italy
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Dourou D, Doulgeraki AI, Vitsou-Anastasiou S, Argyri AA, Chorianopoulos NG, Nychas GJE, Tassou CC. Deciphering the growth responses and genotypic diversity of bioluminescent Photobacterium phosphoreum on chicken meat during aerobic refrigerated storage. Int J Food Microbiol 2023; 405:110334. [PMID: 37517119 DOI: 10.1016/j.ijfoodmicro.2023.110334] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2023] [Revised: 06/29/2023] [Accepted: 07/20/2023] [Indexed: 08/01/2023]
Abstract
The advent of high-throughput sequencing technologies in recent years has revealed the unexpected presence of genus Photobacterium within the chicken meat spoilage ecosystem. This study was undertaken to decipher the occurrence, the growth patterns and the genotypic biodiversity of Photobacterium phosphoreum on chicken breast fillets stored aerobically at 4 °C through conventional microbiological methods and molecular techniques. Samples were periodically cultured on marine broth agar (MA; supplemented with meat extract and vancomycin) for the enumeration of presumptive bioluminescent Photobacterium spp. In total, 90 bioluminescent bacteria were recovered from the initial (time of first appearance), middle and end stages of storage. Concomitantly, 95 total psychrotrophic/psychrophilic bacteria were isolated from the same medium to assess the presence and diversity of non-luminous photobacteria. Genetic diversity between bioluminescent isolates was assessed with two PCR-based DNA fingerprinting methods, i.e. RAPD and rep-PCR. Moreover, the characterization of selected bacterial isolates at the genus and/or species level was performed by sequencing of the 16S rRNA and/or gyrB gene. Bioluminescent bacteria were scarcely encountered in fresh samples at population levels of ca. 2.0 log CFU/g, whilst total psychrotrophic/psychrophilic bacteria were found at levels of ca. 4.4 log CFU/g. As time proceeded and close to shelf-life end, bioluminescent bacteria were encountered at higher populations, and were found at levels of 5.3 and 7.0 log CFU/g in samples from the second and third batch, respectively. In the first batch their presence was occasional and at levels up to 3.9 log CFU/g. Accordingly, total psychrotrophic/psychrophilic bacteria exceeded 8.4 log CFU/g at the end of storage, suggesting the possible underestimation of bioluminescent populations following the specific cultivation conditions. Sequence analysis assigned bioluminescent isolates to Photobacterium phosphoreum, while genetic fingerprinting revealed high intra-species variability. Respectively, total psychrotrophs/psychrophiles were assigned to genera Pseudomonas, Shewanella, Psychrobacter, Acinetobacter, Vibrio and Photobacterium. Non-luminous photobacteria were not identified within the psychrotrophs/psychrophiles. Results of the present study reveal the intra- and inter-batch variability on the occurrence and growth responses of P. phosphoreum and highlight its potential role in the chicken meat spoilage consortium.
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Affiliation(s)
- Dimitra Dourou
- Hellenic Agricultural Organization - DIMITRA, Institute of Technology of Agricultural Products, Sofokli Venizelou 1, 14123 Lycovrissi, Attica, Greece
| | - Agapi I Doulgeraki
- Hellenic Agricultural Organization - DIMITRA, Institute of Technology of Agricultural Products, Sofokli Venizelou 1, 14123 Lycovrissi, Attica, Greece.
| | - Stamatia Vitsou-Anastasiou
- Hellenic Agricultural Organization - DIMITRA, Institute of Technology of Agricultural Products, Sofokli Venizelou 1, 14123 Lycovrissi, Attica, Greece; Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Food Microbiology and Biotechnology, Iera Odos 75, 11855 Athens, Greece
| | - Anthoula A Argyri
- Hellenic Agricultural Organization - DIMITRA, Institute of Technology of Agricultural Products, Sofokli Venizelou 1, 14123 Lycovrissi, Attica, Greece
| | - Nikos G Chorianopoulos
- Hellenic Agricultural Organization - DIMITRA, Institute of Technology of Agricultural Products, Sofokli Venizelou 1, 14123 Lycovrissi, Attica, Greece; Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Food Microbiology and Biotechnology, Iera Odos 75, 11855 Athens, Greece
| | - George-John E Nychas
- Agricultural University of Athens, Department of Food Science and Human Nutrition, Laboratory of Food Microbiology and Biotechnology, Iera Odos 75, 11855 Athens, Greece
| | - Chrysoula C Tassou
- Hellenic Agricultural Organization - DIMITRA, Institute of Technology of Agricultural Products, Sofokli Venizelou 1, 14123 Lycovrissi, Attica, Greece.
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Öztürk H, Geniş B, Özden Tuncer B, Tuncer Y. Bacteriocin production and technological properties of Enterococcus mundtii and Enterococcus faecium strains isolated from sheep and goat colostrum. Vet Res Commun 2023; 47:1321-1345. [PMID: 36738399 DOI: 10.1007/s11259-023-10080-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 01/31/2023] [Indexed: 02/05/2023]
Abstract
Enterococci are lactic acid bacteria (LAB) that play a role in the aroma formation, maturation, and sensory development of fermented foods such as meat and dairy products. They also contribute to the improvement of the extended shelf life of fermented foods by producing bacteriocin. The aim of this study was to isolate bacteriocin-producing LAB from sheep and goat colostrum, to characterize the bacteriocin-producing strains, and determine the technological properties of the strains. A total of 13 bacteriocin-producing LAB was isolated and identified as 11 Enterococcus mundtii and two Enterococcus faecium. The strains were found to be genetically different from each other by phylogenetic analysis of 16S rRNA gene sequences and random amplified polymorphic-DNA (RAPD-PCR). It has been determined that bacteriocins show activity in a wide pH range and are resistant to heat, lose their activity with proteolytic enzymes and α-amylase, but are resistant to detergents. While the presence of the munKS gene was detected in all of the strains, it was determined that E. faecium HC121.4, HC161.1, E. mundtii HC147.1, HC166.5, and HC166.8 strains contained multiple enterocin genes. Trisin-SDS-PAGE analysis revealed two active protein bands of approximately 5.1 and 5.5 kDa in E. faecium HC121.4 and one active protein band with a weight of approximately 4.96 kDa in other strains. E. mundtii strains and E. faecium HC161.1 were identified as mundticin KS producers, and E. faecium HC121.4 was defined as an enterocin A and B producer. Except for E. mundtii HC166.8, acid production of strains was found to be slow at 6 h and moderate at 24 h. None of them showed extracellular proteolytic and lipolytic activities. It was found that the strains had esterase, esterase lipase, leucine arylamidase, acid phosphatase, and naphthol-AS-Bl-phosphohydrolase activities, while protease activities were low and peptidase activities were high. In conclusion, bacteriocin producer 13 Enterococcus strains isolated from sheep and goat colostrum were found to have the potential to be included in starter culture combinations.
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Affiliation(s)
- Hüseyin Öztürk
- Department of Food Technology, Manavgat Vocational School, Akdeniz University, 07600, Antalya, Turkey
| | - Burak Geniş
- Faculty of Engineering, Department of Food Engineering, Süleyman Demirel University, 32260, Isparta, Turkey
| | - Banu Özden Tuncer
- Faculty of Engineering, Department of Food Engineering, Süleyman Demirel University, 32260, Isparta, Turkey
| | - Yasin Tuncer
- Faculty of Engineering, Department of Food Engineering, Süleyman Demirel University, 32260, Isparta, Turkey.
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ElHadedy DE, Kim C, Yousuf AB, Wang Z, Ndegwa EN. Understanding Age-Related Longitudinal Dynamics in Abundance and Diversity of Dominant Culturable Gut Lactic Acid Bacteria in Pastured Goats. Animals (Basel) 2023; 13:2669. [PMID: 37627460 PMCID: PMC10451344 DOI: 10.3390/ani13162669] [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: 06/18/2023] [Revised: 08/01/2023] [Accepted: 08/17/2023] [Indexed: 08/27/2023] Open
Abstract
Understanding gut lactic acid bacteria (LAB) in healthy hosts is an important first step in selecting potential probiotic species. To understand the dynamics of LAB in healthy goats, a cohort of thirty-seven healthy new-born goat kids was studied over a ten-month period. Total LAB was quantified using SYBR green qPCR. Seven hundred LAB isolates were characterized using microscopy, M13 RAPD genotyping and 16S rDNA sequencing. The highest and lowest LAB counts were detected at one week and ten months of age, respectively. Diverse LAB species were detected, whose identity and prevalence varied with age. The main isolates belonged to Limosilactobacillus reuteri, Limosilactibacillus fermentum, Lactobacillus johnsonni, Ligilactobacillus murinus, Ligilactobacillus salivarius, Limosilactobacillus mucosae, Lactiplantibacillus plantarum, Ligilactobacillus agilis, Lactobacillus acidophilus/amyolovolus, Pediococcus spp. and Enterococcus spp. Uniquely, L. reuteri and Pediococcus spp. were most common in pre- and peri-weaned goats, while Lactobacillus mucosae and Enterococcus spp. were predominant in goats one month and older. Based on RAPD genotyping, L. reuteri had the highest genotypic diversity, with age being a factor on the genotypes detected. This data may be relevant in the selection of age-specific probiotics for goats. The findings may also have broader implications by highlighting age as a factor for consideration in probiotic bacteria selection in other animal hosts.
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Affiliation(s)
- Doaa E. ElHadedy
- Agricultural Research Station, Virginia State University, Petersburg, VA 23806, USA; (D.E.E.); (C.K.); (A.B.Y.); (Z.W.)
- National Centre for Radiation Research and Technology NCRRT, Radiation Microbiology Department, Egyptian Atomic Energy Authority (EAEA), Cairo 11787, Egypt
| | - Chyer Kim
- Agricultural Research Station, Virginia State University, Petersburg, VA 23806, USA; (D.E.E.); (C.K.); (A.B.Y.); (Z.W.)
| | - Adnan B. Yousuf
- Agricultural Research Station, Virginia State University, Petersburg, VA 23806, USA; (D.E.E.); (C.K.); (A.B.Y.); (Z.W.)
| | - Zhenping Wang
- Agricultural Research Station, Virginia State University, Petersburg, VA 23806, USA; (D.E.E.); (C.K.); (A.B.Y.); (Z.W.)
| | - Eunice N. Ndegwa
- Agricultural Research Station, Virginia State University, Petersburg, VA 23806, USA; (D.E.E.); (C.K.); (A.B.Y.); (Z.W.)
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Jing Y, Feng B, Gao J, Li J, Zhou G, Sun Z, Wang Y. BLAB2CancerKD: a knowledge graph database focusing on the association between lactic acid bacteria and cancer, but beyond. Database (Oxford) 2023; 2023:7176387. [PMID: 37221044 DOI: 10.1093/database/baad036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 04/23/2023] [Accepted: 04/28/2023] [Indexed: 05/25/2023]
Abstract
In a broad sense, lactic acid bacteria (LAB) is a general term for Gram-positive bacteria that can produce lactic acid by utilizing fermentable carbohydrates. It is widely used in essential fields such as industry, agriculture, animal husbandry and medicine. At the same time, LAB are closely related to human health. They can regulate human intestinal flora and improve gastrointestinal function and body immunity. Cancer, a disease in which some cells grow out of control and spread to other body parts, is one of the leading causes of human death worldwide. In recent years, the potential of LAB in cancer treatment has attracted attention. Mining knowledge from the scientific literature significantly accelerates its application in cancer treatment. Using 7794 literature studies of LAB cancer as source data, we have processed 16 543 biomedical concepts and 23 091 associations by using automatic text mining tools combined with manual curation of domain experts. An ontology containing 31 434 pieces of structured data is constructed. Finally, based on ontology, a knowledge graph (KG) database, which is called Beyond 'Lactic acid bacteria to Cancer Knowledge graph Database' (BLAB2CancerKD), is constructed by using KG and web technology. BLAB2CancerKD presents all the relevant knowledge intuitively and clearly in various data presentation forms, and the interactive system function also makes it more efficient. BLAB2CancerKD will be continuously updated to advance the research and application of LAB in cancer therapy. Researchers can visit BLAB2CancerKD at. Database URL http://110.40.139.2:18095/.
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Affiliation(s)
- Yi Jing
- Faculty of Science, The University of New South Wales, High Street, Sydney, New South Wales 2052, Australia
- Inner Mongolia Autonomous Region Key Laboratory of Big Data Research and Application for Agriculture and Animal Husbandry, Zhaowuda Road No. 306, Hohhot 010018, China
| | - Baiyang Feng
- Inner Mongolia Autonomous Region Key Laboratory of Big Data Research and Application for Agriculture and Animal Husbandry, Zhaowuda Road No. 306, Hohhot 010018, China
- College of Computer and Information Engineering, Inner Mongolia Agricultural University, Erdos East Street No. 29, Hohhot 010011, China
| | - Jing Gao
- Inner Mongolia Autonomous Region Key Laboratory of Big Data Research and Application for Agriculture and Animal Husbandry, Zhaowuda Road No. 306, Hohhot 010018, China
- College of Computer and Information Engineering, Inner Mongolia Agricultural University, Erdos East Street No. 29, Hohhot 010011, China
- Inner Mongolia Autonomous Region Big Data Center, Chilechuan Street No. 1, Hohhot 010091, China
| | - Jin Li
- Inner Mongolia Autonomous Region Key Laboratory of Big Data Research and Application for Agriculture and Animal Husbandry, Zhaowuda Road No. 306, Hohhot 010018, China
- College of Computer and Information Engineering, Inner Mongolia Agricultural University, Erdos East Street No. 29, Hohhot 010011, China
| | - Ganghui Zhou
- Inner Mongolia Autonomous Region Key Laboratory of Big Data Research and Application for Agriculture and Animal Husbandry, Zhaowuda Road No. 306, Hohhot 010018, China
- College of Computer and Information Engineering, Inner Mongolia Agricultural University, Erdos East Street No. 29, Hohhot 010011, China
| | - Zhihong Sun
- College of Food Science and Engineering, Inner Mongolia Agricultural University, Zhaowuda Road No. 306, Hohhot 010018, China
| | - Yufei Wang
- The Affiliated Hospital of Inner Mongolia Medical University, Tongdao North road No.1, Hohhot 010050, China
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Rebaza-Cardenas TD, Silva-Cajaleón K, Sabater C, Delgado S, Montes-Villanueva ND, Ruas-Madiedo P. "Masato de Yuca" and "Chicha de Siete Semillas" Two Traditional Vegetable Fermented Beverages from Peru as Source for the Isolation of Potential Probiotic Bacteria. Probiotics Antimicrob Proteins 2023; 15:300-311. [PMID: 34453308 PMCID: PMC10024669 DOI: 10.1007/s12602-021-09836-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/11/2021] [Indexed: 10/20/2022]
Abstract
In this work, two Peruvian beverages "Masato de Yuca," typical of the Amazonian communities made from cassava (Manihot esculenta), and "Chicha de Siete Semillas," made from different cereal, pseudo-cereal, and legume flours, were explored for the isolation of lactic acid bacteria after obtaining the permission of local authorities following Nagoya protocol. From an initial number of 33 isolates, 16 strains with different RAPD- and REP-PCR genetic profiles were obtained. In Chicha, all strains were Lactiplantibacillus plantarum (formerly Lactobacillus plantarum), whereas in Masato, in addition to this species, Limosilactobacillus fermentum (formerly Lactobacillus fermentum), Pediococcus acidilactici, and Weissella confusa were also identified. Correlation analysis carried out with their carbohydrate fermentation patterns and enzymatic profiles allowed a clustering of the lactobacilli separated from the other genera. Finally, the 16 strains were submitted to a static in vitro digestion (INFOGEST model) that simulated the gastrointestinal transit. Besides, their ability to adhere to the human epithelial intestinal cell line HT29 was also determined. Following both procedures, the best probiotic candidate was Lac. plantarum Ch13, a robust strain able to better face the challenging conditions of the gastrointestinal tract and showing higher adhesion ability to the intestinal epithelium in comparison with the commercial probiotic strain 299v. In order to characterize its benefit for human health, this Ch13 strain will be deeply studied in further works.
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Affiliation(s)
- Teresa D Rebaza-Cardenas
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain
- Facultad de Ingeniería Agraria, Universidad Católica Sedes Sapientiae (UCSS), Lima, Peru
| | - Kenneth Silva-Cajaleón
- Facultad de Ingeniería Agraria, Universidad Católica Sedes Sapientiae (UCSS), Lima, Peru
| | - Carlos Sabater
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain
- Group Functionality and Ecology of Beneficial Microbes, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Asturias, Oviedo, Spain
| | - Susana Delgado
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain
- Group Functionality and Ecology of Beneficial Microbes, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Asturias, Oviedo, Spain
| | | | - Patricia Ruas-Madiedo
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias - Consejo Superior de Investigaciones Científicas (IPLA-CSIC), Villaviciosa, Asturias, Spain.
- Group Functionality and Ecology of Beneficial Microbes, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Asturias, Oviedo, Spain.
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Alfonzo A, Naselli V, Gaglio R, Settanni L, Corona O, La Croce F, Vagnoli P, Krieger-Weber S, Francesca N, Moschetti G. Use of Different Nutrients to Improve the Fermentation Performances of Lactiplantibacillus pentosus OM13 during the Production of Sevillian Style Green Table Olives. Microorganisms 2023; 11:microorganisms11040825. [PMID: 37110248 PMCID: PMC10146404 DOI: 10.3390/microorganisms11040825] [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: 02/20/2023] [Revised: 03/16/2023] [Accepted: 03/22/2023] [Indexed: 04/29/2023] Open
Abstract
The aim of this study was to evaluate the fermentation performance of the commercial starter Lactiplantibacillus pentosus OM13 with four nutrients (A, B, C, and D) that differed in the following ingredients: starch, sugars, maltodextrin, inactivated yeast, inactivated yeast rich in amino acids, inactivated yeast rich in mannoproteins, and salt (NaCl). For this purpose, six different experimental productions of Nocellara del Belice table olives were carried out. During transformation, the fermentation process was monitored by measuring pH and plate counts for lactic acid bacteria (LAB), yeasts, Enterobacteriaceae, Staphylococcaceae, and Pseudodomondaceae populations. At the end of the production process, each trial was subjected to volatile organic compound analysis and sensory evaluation. The addition of the different nutrients resulted in a significant reduction in pH (around 2.5 points) after 3 days of fermentation. At the same time, a significant increase in the number of LAB populations (> 6.6 log CFU/mL) was observed for all trials. Volatile organic compound (VOC) analysis revealed the presence of 39 compounds. In this study, nutrient C was optimal for improving the fermentation activity of L. pentosus OM13. These results provide elements for the implementation of experimental protocols to reduce product losses and improve sensory characteristics.
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Affiliation(s)
- Antonio Alfonzo
- Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, Viale delle Scienze Bldg. 5, Ent. C, 90128 Palermo, Italy
| | - Vincenzo Naselli
- Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, Viale delle Scienze Bldg. 5, Ent. C, 90128 Palermo, Italy
| | - Raimondo Gaglio
- Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, Viale delle Scienze Bldg. 5, Ent. C, 90128 Palermo, Italy
| | - Luca Settanni
- Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, Viale delle Scienze Bldg. 5, Ent. C, 90128 Palermo, Italy
| | - Onofrio Corona
- Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, Viale delle Scienze Bldg. 5, Ent. C, 90128 Palermo, Italy
| | - Francesco La Croce
- Geolive Belice S.r.l., S.S. 115 Km dir. Marinella, 91022 Castelvetrano, Italy
| | - Paola Vagnoli
- Lallemand Italia, Via Rossini 14/B, 37060 Castel D'Azzano, Italy
| | - Sibylle Krieger-Weber
- Lallemand, Office Korntal-Münchingen, In den Seiten 53, 70825 Korntal-Münchingen, Germany
| | - Nicola Francesca
- Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, Viale delle Scienze Bldg. 5, Ent. C, 90128 Palermo, Italy
| | - Giancarlo Moschetti
- Department of Agricultural, Food and Forest Sciences (SAAF), University of Palermo, Viale delle Scienze Bldg. 5, Ent. C, 90128 Palermo, Italy
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Baev V, Apostolova E, Gotcheva V, Koprinarova M, Papageorgiou M, Rocha JM, Yahubyan G, Angelov A. 16S-rRNA-Based Metagenomic Profiling of the Bacterial Communities in Traditional Bulgarian Sourdoughs. Microorganisms 2023; 11:microorganisms11030803. [PMID: 36985376 PMCID: PMC10058899 DOI: 10.3390/microorganisms11030803] [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: 01/30/2023] [Revised: 03/14/2023] [Accepted: 03/17/2023] [Indexed: 03/30/2023] Open
Abstract
Sourdoughs (SDs) are spontaneously formed microbial ecosystems composed of various species of lactic acid bacteria (LAB) and acid-tolerant yeasts in food matrices of cereal flours mixed with water. To date, more than 90 LAB species have been isolated, significantly impacting the organoleptic characteristics, shelf life, and health properties of bakery products. To learn more about the unique bacterial communities involved in creating regional Bulgarian sourdoughs, we examined the metacommunities of five sourdoughs produced by spontaneous fermentation and maintained by backslopping in bakeries from three geographic locations. The 16S rRNA gene amplicon sequencing showed that the former genus Lactobacillus was predominant in the studied sourdoughs (51.0-78.9%). Weissella (0.9-42.8%), Herbaspirillum (1.6-3.8%), Serratia (0.1-11.7%), Pediococcus (0.2-7.5%), Bacteroides (0.1-1.3%), and Sphingomonas (0.1-0.5%) were also found in all 5 samples. Genera Leuconostoc, Enterococcus, Bacillus, and Asaia were sample-specific. It is interesting to note that the genus Weissella was more abundant in wholegrain samples. The greatest diversity at the species level was found in the former genus Lactobacillus, presented in the sourdough samples with 13 species. The UPGMA cluster analysis clearly demonstrated similarity in species' relative abundance between samples from the same location. In addition, we can conclude that the presence of two main clusters-one including samples from mountainous places (the cities of Smolyan and Bansko) and the other including samples from the city of Ruse (the banks of the Danube River)-may indicate the impact of climate and geographic location (e.g., terrain, elevation, land use, and nearby water bodies and their streams) on the abundance of microbiome taxa. As the bacterial population is crucial for bread standardization, we expect the local bakery sector to be interested in the relationship between process variables and their effect on bacterial dynamics described in this research study.
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Affiliation(s)
- Vesselin Baev
- Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria
| | - Elena Apostolova
- Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria
| | - Velitchka Gotcheva
- Department of Biotechnology, University of Food Technologies, 26 Maritza Blvd., 4000 Plovdiv, Bulgaria
| | - Miglena Koprinarova
- Institute of Molecular Biology "Acad. Roumen Tsanev", Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 21, 1113 Sofia, Bulgaria
- Department of Catering and Nutrition, University of Food Technologies, 26 Maritza Blvd., 4000 Plovdiv, Bulgaria
| | - Maria Papageorgiou
- Department of Food Science and Technology, International Hellenic University, P.O. Box 141, 57400 Thessaloniki, Greece
| | - João Miguel Rocha
- Universidade Católica Portuguesa, CBQF-Centro de Biotecnologia e Química Fina-Laboratório Associado, Escola Superior de Biotecnologia, Rua Diogo Botelho 1327, 4169-005 Porto, Portugal
| | - Galina Yahubyan
- Faculty of Biology, University of Plovdiv, Tzar Assen 24, 4000 Plovdiv, Bulgaria
| | - Angel Angelov
- Department of Biotechnology, University of Food Technologies, 26 Maritza Blvd., 4000 Plovdiv, Bulgaria
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9
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Abarquero D, Bodelón R, Flórez AB, Fresno JM, Renes E, Mayo B, Tornadijo ME. Technological and safety assessment of selected lactic acid bacteria for cheese starter cultures design: Enzymatic and antimicrobial activity, antibiotic resistance and biogenic amine production. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
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10
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Saticioglu IB, Ay H, Altun S, Duman M. Genomic insight into Chryseobacterium turcicum sp. nov. and Chryseobacterium muglaense sp. nov. isolated from farmed rainbow trout in Turkey. Syst Appl Microbiol 2023; 46:126385. [PMID: 36410095 DOI: 10.1016/j.syapm.2022.126385] [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: 07/10/2022] [Revised: 11/08/2022] [Accepted: 11/10/2022] [Indexed: 11/15/2022]
Abstract
Four strains, designated as C-2, C-17T, C-39T and Ch-15, were isolated from farmed rainbow trout samples showing clinical signs during an investigation for a fish-health screening study. The pairwise 16S rRNA gene sequence analysis showed that strain C-17T shared the highest identity level of 98.1 % with the type strain of Chryseobacterium piscium LMG 23089T while strains C-2, C-39T and Ch-15 were closely related to Chryseobacterium balustinum DSM 16775T with an identity level of 99.3 %. A polyphasic approach involving phenotypic, chemotaxonomic and genome-based analyses was employed to determine the taxonomic provenance of the strains. The overall genome relatedness indices including dDDH and ANI analyses confirmed that strains C-2, C-17T, C-39T and Ch-15 formed two novel species within the genus Chryseobacterium. Chemotaxonomic analyses showed that strains C-17T and C-39T have typical characteristics of the genus Chryseobacterium by having phosphatidylethanolamine in their polar lipid profile, MK-6 as only isoprenoid quinone and the presence of iso-C15:0 as major fatty acid. The genome size and G + C content of the strains ranged between 4.4 and 5.0 Mb and 33.5 - 33.6 %, respectively. Comprehensive genome analyses revealed that the strains have antimicrobial resistance genes, prophages and horizontally acquired genes in addition to secondary metabolite-coding gene clusters. In conclusion, based on the polyphasic analyses conducted on the present study, strains C-17T and C-39T are representatives of two novel species within the genus Chryseobacterium, for which the names Chryseobacterium turcicum sp. nov. and Chryseobacterium muglaense sp. nov. with the type strains C-17T (=JCM 34190T = KCTC 82250T) and C-39T (=JCM 34191T = KCTC 822251T), respectively, are proposed.
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Affiliation(s)
- Izzet Burcin Saticioglu
- Department of Aquatic Animal Disease, Faculty of Veterinary Medicine, Erciyes University, 38280 Kayseri, Turkey; Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Bursa Uludag University, Bursa 16059, Turkey.
| | - Hilal Ay
- Department of Molecular Biology and Genetics, Faculty of Science, Ondokuz Mayis University, Samsun 55139, Turkey
| | - Soner Altun
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Bursa Uludag University, Bursa 16059, Turkey
| | - Muhammed Duman
- Department of Aquatic Animal Diseases, Faculty of Veterinary Medicine, Bursa Uludag University, Bursa 16059, Turkey
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11
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Haryani Y, Halid NA, Guat GS, Nor-Khaizura MAR, Hatta MAM, Sabri S, Radu S, Hasan H. High prevalence of multiple antibiotic resistance in fermented food-associated lactic acid bacteria in Malaysia. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.109558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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12
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Shiga Toxin Subtypes, Serogroups, Phylogroups, RAPD Genotypic Diversity, and Select Virulence Markers of Shiga-Toxigenic Escherichia coli Strains from Goats in Mid-Atlantic US. Microorganisms 2022; 10:microorganisms10091842. [PMID: 36144444 PMCID: PMC9505625 DOI: 10.3390/microorganisms10091842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Revised: 09/11/2022] [Accepted: 09/13/2022] [Indexed: 12/03/2022] Open
Abstract
Understanding Shiga toxin subtypes in E. coli from reservoir hosts may give insight into their significance as human pathogens. The data also serve as an epidemiological tool for source tracking. We characterized Shiga toxin subtypes in 491 goat E. coli isolates (STEC) from the mid-Atlantic US region (stx1 = 278, stx2 = 213, and stx1/stx2 = 95). Their serogroups, phylogroups, M13RAPD genotypes, eae (intimin), and hly (hemolysin) genes were also evaluated. STEC-positive for stx1 harbored Stx1c (79%), stx1a (21%), and stx a/c (4%). Those positive for Stx2 harbored stx2a (55%) and Stx2b (32%), while stx2a/stx2d and stx2a/stx2b were each 2%. Among the 343 STEC that were serogrouped, 46% (n = 158) belonged to O8, 20% (n = 67) to 076, 12% (n = 42) to O91, 5% (n = 17) to O5, and 5% (n = 18) to O26. Less than 5% belonged to O78, O87, O146, and O103. The hly and eae genes were detected in 48% and 14% of STEC, respectively. Most belonged to phylogroup B1 (73%), followed by D (10%), E (8%), A (4%), B2 (4%), and F (1%). M13RAPD genotyping revealed clonality of 091, O5, O87, O103, and O78 but higher diversity in the O8, O76, and O26 serogroups. These results indicate goat STEC belonged to important non-O157 STEC serogroups, were genomically diverse, and harbored Shiga toxin subtypes associated with severe human disease.
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13
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Valorisation of Bovine Sweet Whey and Sunflower Press Cake Blend through Controlled Fermentation as Platform for Innovative Food Materials. Foods 2022; 11:foods11101417. [PMID: 35626987 PMCID: PMC9142124 DOI: 10.3390/foods11101417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Revised: 05/05/2022] [Accepted: 05/09/2022] [Indexed: 11/16/2022] Open
Abstract
The current environmental challenge is pushing food systems towards more sustainable models of production that require reorganizing of processes by re-using side products still containing nutrients. This work aimed at valorising a mix of bovine sweet whey and sunflower press cake, through targeted fermentation. After preliminary screening based on growth rate, final pH, lactose/galactose assimilation, phytase activity, six Lactic Acid Bacteria strains (Lacticaseibacillus casei, L. paracasei (2), Lactococcus lactis, Lentilactobacillus parakefiri and Leuconostoc pseudomesenteroides) and three yeasts (Kluyveromyces lactis, K. marxianus and Torulaspora delbrueckii) were co-cultivated in pairs in microcosms (1-part ground press cake: 4-parts whey). All tested microorganisms were able to grow and acidify the blend: the LAB counts increased during the incubation (26 °C for 48 h) of +2.80 log CFU/g, whereas yeasts counts were of +1.98 log CFU/g, with significant differences among the different associations (p < 0.01). Mould counts were always <3 log CFU/g. Interestingly, the bacterial contaminants count significantly varied in samples with different pairs of strains (p < 0.001). Acidification level, acetic acid and ethanol contents were the limiting factors affecting the growth of spoilage micro-organisms. Best performances were attained in microcosms inoculated with L. lactis or L. paracasei and K. lactis or K. marxianus.
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14
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Yeast Biodiversity in Vineyard during Grape Ripening: Comparison between Culture Dependent and NGS Analysis. Processes (Basel) 2022. [DOI: 10.3390/pr10050901] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
In this study, the evolution of the yeast microflora present on the berry surface, during the ripening of Barbera grapes, was monitored. Sampling was performed in three vineyards located in the “Nizza” Barbera d’Asti DOC zone and different methodologies have been employed. A culture-dependent method based on the identification of strains grown on solid media by ARDRA (Amplified Ribosomal DNA Restriction Analysis) and the D1-D2 domain of ribosomal 26S DNA capillary sequencing was coupled to NGS (Next Generation Sequencing) targeting ITS (Internal Transcribed Sequence) amplicons with the Illumina MiSeq platform. By using culture-dependent techniques, the most frequently detected species was the yeast-like fungus Aureobasidium pullulans, which was dominant in the culturable fraction. Among yeasts, the presence of oligotrophic basidiomycetes such as Cryptococcus spp., Rhodotorula graminis and Sporidiobolus pararoseus was observed at the beginning of ripening. Afterward, upon approaching the harvest, a succession of oxidative or weakly fermentative copiotrophic species occurs, such as Saturnispora diversa, Issatchenkia terricola, Hanseniaspora opuntiae, Starmerella bacillaris and Hanseniaspora uvarum. The massive sequencing revealed a larger number of species, respect to the culture-dependent data. Comparing the two different approaches used in this work, it is possible to highlight some similarities since Aureobasidium, Rhodotorula and Sporobolomyces were detected by both methods. On the contrary, genera Hanseniaspora, Issatchenkia and Saturnispora were revealed by culture-dependent methods, but not by NGS, while Saccharomyces spp. were identified, with low frequency, only by NGS. The integrated application of NGS sequencing and culture-dependent techniques provides a comprehensive view of mycodiversity in the wine-growing environment, especially for yeasts with low abundance.
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Jomehzadeh N, Amin M, Javaherizadeh H, Rashno M. MOLECULAR ASSESSMENT OF FECAL LACTOBACILLI POPULATIONS IN CHILDREN WITH FUNCTIONAL CONSTIPATION. ARQUIVOS DE GASTROENTEROLOGIA 2022; 59:244-250. [PMID: 35830036 DOI: 10.1590/s0004-2803.202202000-44] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 03/29/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Investigation of the gut-specific bacterial strains including lactobacilli is essential for understanding the bacterial etiology of constipation. OBJECTIVE This study aimed to compare the prevalence and quantity of intestinal lactobacilli in constipated children and healthy controls. METHODS Forty children fulfilling Rome IV criteria for functional constipation and 40 healthy controls were recruited. Fecal samples were analyzed using species-specific polymerase chain reaction followed by random amplified polymorphic DNA-PCR and quantitative real-time PCR. RESULTS Totally, seven different species of lactobacilli were detected. Out of 80 volunteers, 65 (81.3%) were culture and species-specific PCR positive from which 25 (38.46%) constipated children and 40 (61.54%) healthy subjects. The most prevalent species were L. paracasei 21 (32.3%) followed by L. plantarum 18 (27.7%) among both healthy and patient groups. Analysis of the RAPD dendrograms displayed that strains isolated from constipated and non-constipated children have similarity coefficients of more than 90%. The qPCR assays demonstrated constipated children had a lower amount of total lactobacilli population (per gram of feces) than healthy controls. CONCLUSION Our findings showed that the mere existence of various species of Lactobacillus in the gut does not enough to prevent some gastrointestinal disorders such as functional constipation, and their quantity plays a more important role.
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Affiliation(s)
- Nabi Jomehzadeh
- Department of Microbiology, School of Medicine, Abadan University of Medical Sciences, Abadan, Iran
- Cellular and Molecular Research Center, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mansour Amin
- Infectious and Tropical Diseases Research Center, Health Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Hazhir Javaherizadeh
- Alimentary Tract Research Center, Clinical Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Mohammad Rashno
- Department of Microbiology, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
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16
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Rodríguez J, González-Guerra A, Vázquez L, Fernández-López R, Flórez AB, de la Cruz F, Mayo B. Isolation and phenotypic and genomic characterization of Tetragenococcus spp. from two Spanish traditional blue-veined cheeses made of raw milk. Int J Food Microbiol 2022; 371:109670. [DOI: 10.1016/j.ijfoodmicro.2022.109670] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Revised: 03/28/2022] [Accepted: 04/02/2022] [Indexed: 11/27/2022]
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17
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Bastião Rocha PA, Monteiro Marques JM, Barreto AS, Semedo-Lemsaddek T. Enterococcus spp. from Azeitão and Nisa PDO-cheeses: Surveillance for antimicrobial drug resistance. Lebensm Wiss Technol 2022. [DOI: 10.1016/j.lwt.2021.112622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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18
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Technological Parameters, Anti- Listeria Activity, Biogenic Amines Formation and Degradation Ability of L. plantarum Strains Isolated from Sheep-Fermented Sausage. Microorganisms 2021; 9:microorganisms9091895. [PMID: 34576790 PMCID: PMC8470431 DOI: 10.3390/microorganisms9091895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 08/27/2021] [Accepted: 08/31/2021] [Indexed: 11/17/2022] Open
Abstract
The aim of this work was to identify and characterize, from a technological and safety point of view, the lactic acid bacteria (LAB) isolated from traditional sheep-fermented sausage. First, LABs were identified then were screened for some technological parameters such as acidifying and growth ability, proteolytic and lipolytic activity and for antimicrobial activity. Finally, biogenic amine production and degradation abilities were also evaluated. This research reveals the predominance of Lactiplantibacillus (L.) plantarum on LAB community. Almost all L. plantarum strains were active against Listeria monocytogenes strains (inhibition zone diameters > 1 cm). None of the tested strains were positive in histidine (hdcA), lysine (ldc) and tyrosine (tyrdc) decarboxylase genes and only one (L. plantarum PT9-2) was positive to the agmatine deiminase (agdi) gene. Furthermore, given the positive results of the sufl (multi-copper oxidase) gene detection, all strains showed a potential degradation ability of biogenic amines.
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19
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Blaiotta G, Marrone R, Aponte M, Peruzy MF, Smaldone G, Vollano L, Murru N. Characterisation of Conciato Romano: one of the oldest Italian cheeses. Int Dairy J 2021. [DOI: 10.1016/j.idairyj.2021.105077] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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20
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Gholizadeh P, Aghazadeh M, Ghotaslou R, Rezaee MA, Pirzadeh T, Cui L, Watanabe S, Feizi H, Kadkhoda H, Kafil HS. Role of CRISPR-Cas system on antibiotic resistance patterns of Enterococcus faecalis. Ann Clin Microbiol Antimicrob 2021; 20:49. [PMID: 34321002 PMCID: PMC8317297 DOI: 10.1186/s12941-021-00455-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2021] [Accepted: 07/19/2021] [Indexed: 12/27/2022] Open
Abstract
Clustered regularly interspaced short palindromic repeat (CRISPR)-Cas systems are one of the factors which can contribute to limiting the development and evolution of antibiotic resistance in bacteria. There are three genomic loci of CRISPR-Cas in Enterococcus faecalis. In this study, we aimed to assess correlation of the CRISPR-Cas system distribution with the acquisition of antibiotic resistance among E. faecalis isolates. A total of 151 isolates of E. faecalis were collected from urinary tract infections (UTI) and dental-root canal (DRC). All isolates were screened for phenotypic antibiotic resistance. In addition, antibiotic resistance genes and CRISPR loci were screened by using polymerase chain reaction. Genomic background of the isolates was identified by random amplified polymorphic DNA (RAPD)-PCR. The number of multidrug-resistant E. faecalis strains were higher in UTI isolates than in DRC isolates. RAPD-PCR confirmed that genomic background was diverse in UTI and DRC isolates used in this study. CRISPR loci were highly accumulated in gentamycin-, teicoplanin-, erythromycin-, and tetracycline-susceptible strains. In concordance with drug susceptibility, smaller number of CRISPR loci were identified in vanA, tetM, ermB, aac6’-aph(2”), aadE, and ant(6) positive strains. These data indicate a negative correlation between CRISPR-cas loci and antibiotic resistance, as well as, carriage of antibiotic resistant genes in both of UTI and DRC isolates.
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Affiliation(s)
- Pourya Gholizadeh
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Aghazadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Ghotaslou
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Tahereh Pirzadeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Longzhu Cui
- Division of Bacteriology, Department of Infection and Immunity, School of Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Shinya Watanabe
- Division of Bacteriology, Department of Infection and Immunity, School of Medicine, Jichi Medical University, Shimotsuke, Tochigi, Japan
| | - Hadi Feizi
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hiva Kadkhoda
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.,Student Research Committee, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Hossein Samadi Kafil
- Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran.
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21
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Isolation and Characterization of Lactic Acid Bacteria and Yeasts from Typical Bulgarian Sourdoughs. Microorganisms 2021; 9:microorganisms9071346. [PMID: 34206198 PMCID: PMC8306846 DOI: 10.3390/microorganisms9071346] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 06/11/2021] [Accepted: 06/17/2021] [Indexed: 11/23/2022] Open
Abstract
Traditional sourdoughs in Bulgaria were almost extinct during the centralized food production system. However, a rapidly developing trend of sourdough revival in the country is setting the demand for increased production and use of commercial starter cultures. The selection of strains for such cultures is based on geographical specificity and beneficial technological properties. In this connection, the aim of this study was to isolate, identify and characterize lactic acid bacteria (LAB) and yeasts from typical Bulgarian sourdoughs for the selection of strains for commercial sourdough starter cultures. Twelve samples of typical Bulgarian sourdoughs were collected from different geographical locations. All samples were analyzed for pH, total titratable acidity and dry matter content. Enumeration of LAB and yeast was also carried out. Molecular identification by 16S rDNA sequence analysis was performed for 167 LAB isolates, and 106 yeast strains were identified by ITS1-5.8S-ITS2 rRNA gene partial sequence analysis. The LAB strains were characterized according to their amylolytic and proteolytic activity and acidification capacity, and 11 strains were selected for further testing of their antimicrobial properties. The strains with the most pronounced antibacterial and antifungal activity are listed as recommended candidates for the development of starter cultures for sourdoughs or other food products.
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22
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Eveno M, Salouhi A, Belguesmia Y, Bazinet L, Gancel F, Fliss I, Drider D. Biodiversity and Phylogenetic Relationships of Novel Bacteriocinogenic Strains Isolated from Animal's Droppings at the Zoological Garden of Lille, France. Probiotics Antimicrob Proteins 2021; 13:218-228. [PMID: 32388703 DOI: 10.1007/s12602-020-09657-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
This study aimed at exploring droppings of animals living in captivity in the zoological garden (Zoo) of Lille (France), as novel sources of bacteriocinogenic strains. A collection of 295 bacterial isolates was constituted from droppings of capybara, alpaca, muntjac, zebra, tapir, rhinoceros, binturong, armadillo, saki monkey and cockatoo. Of 295 isolates, 51 exhibited antagonism against a panel of pathogenic target bacteria like Escherichia coli MC4100, Clostridium perfringens DSM 756 and Salmonella enterica subsp. enterica Newport ATCC6962. Remarkably, within this collection, only 2 Gram-negative bacilli exhibited activity against E. coli MC4100 strain used as target organism. Then, the 16S rDNA sequencing revealed these thereafter cited species, Pediococcus pentosaceus, Weissella cibaria, E. coli, Lactobacillus reuteri, Enterococcus hirae and Enterococcus faecalis. Characterization of this antagonism has revealed 11 strains able producing extracellular protease-sensitive inhibitory compounds. These strains included E. coli ICVB442 and ICVB443, Ent. faecalis ICVB472, ICVB474, ICVB477 ICVB479, ICVB481, ICVB497 and ICVB501 and Ped. pentosaceus ICVB491 and ICVB492. The genomes of the 5 most promising bacteriocinogenic strains were sequenced and analysed with Bagel4 software. Afterwards, this bioinformatics analysis permitted to locate genes encoding bacteriocins like colicin Y (E. coli), enterocin 1071A, enterocin 107 B (Ent. faecalis) and penocin A (Ped. pentosaceus), associating the above-mentioned antibacterial activity of proteinaceous nature to possible production of bacteriocins. All these results enabled us to select different bacteriocinogenic strains for a further characterization in terms of beneficial traits.
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Affiliation(s)
- Mégane Eveno
- UMR Transfrontalière BioEcoAgro N° 1158, Univ. Lille, INRAE, Univ. Liège, UPJV, YNCREA, Univ. Artois, Univ. Littoral Côte d'Opale, ICV - Institut Charles Viollette, F-59000, Lille, France.,Pavillon Paul-Comtois, Université Laval, 2425 Rue de l'Agriculture, Local 1413, Québec, Canada
| | - Amine Salouhi
- UMR Transfrontalière BioEcoAgro N° 1158, Univ. Lille, INRAE, Univ. Liège, UPJV, YNCREA, Univ. Artois, Univ. Littoral Côte d'Opale, ICV - Institut Charles Viollette, F-59000, Lille, France
| | - Yanath Belguesmia
- UMR Transfrontalière BioEcoAgro N° 1158, Univ. Lille, INRAE, Univ. Liège, UPJV, YNCREA, Univ. Artois, Univ. Littoral Côte d'Opale, ICV - Institut Charles Viollette, F-59000, Lille, France
| | - Laurent Bazinet
- Pavillon Paul-Comtois, Université Laval, 2425 Rue de l'Agriculture, Local 1413, Québec, Canada
| | - Frédérique Gancel
- UMR Transfrontalière BioEcoAgro N° 1158, Univ. Lille, INRAE, Univ. Liège, UPJV, YNCREA, Univ. Artois, Univ. Littoral Côte d'Opale, ICV - Institut Charles Viollette, F-59000, Lille, France
| | - Ismail Fliss
- Pavillon Paul-Comtois, Université Laval, 2425 Rue de l'Agriculture, Local 1413, Québec, Canada
| | - Djamel Drider
- Pavillon Paul-Comtois, Université Laval, 2425 Rue de l'Agriculture, Local 1413, Québec, Canada. .,Université de Lille, Cité Scientifique/Avenue Paul Langevin, Polytech-Lille, Bureau C315, 59655, Villeneuve d'Ascq, France.
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23
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Mancini A, Rodriguez MC, Zago M, Cologna N, Goss A, Carafa I, Tuohy K, Merz A, Franciosi E. Massive Survey on Bacterial-Bacteriophages Biodiversity and Quality of Natural Whey Starter Cultures in Trentingrana Cheese Production. Front Microbiol 2021; 12:678012. [PMID: 34194413 PMCID: PMC8236940 DOI: 10.3389/fmicb.2021.678012] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2021] [Accepted: 04/29/2021] [Indexed: 01/04/2023] Open
Abstract
This study focused on the microbial and bacteriophages identification and characterization in cheese-production facilities that use natural whey starter (NWS) cultures for Trentingrana production. Bacterial and phage screening was carried out on cooked not acidified whey and NWS samples isolated from six dairy factories, for 4 consecutive days in four different months. By means of a combined approach, using plate counts, bacterial isolation, and metataxonomic analysis Lactobacillus helveticus was found occurring as the dominant species in NWS cultures and Levilactobacillus brevis as codominant in the cheese factories where the temperature of NWS production was mainly lower than 40°C, suggesting that the variability in the parameters of the NWS culture preparation could differently modulate the bacterial species in NWS cultures. Using turbidity test approach on 303 bacterial isolates from the NWS cultures, 120 distinct phages were identified. L. helveticus phage contamination of NWS cultures was revealed in most of the analyzed samples, but despite the great recovery of bacteriophage contamination cases, the microbial quality of NWS cultures was high. Our results support the presence of natural bacteriophage resistance mechanisms in L. helveticus. The use of NWS cultures probably creates an ideal environment for the proliferation of different L. helveticus strains balanced with their phages without a clear dominance. It is evident, from this study, that the presence of a high biodiversity of NWS bacterial strains is relevant to avoid phages dominance in NWS cultures and consequently to keep a good acidification ability.
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Affiliation(s)
- Andrea Mancini
- Food Quality and Nutrition Department, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
| | - Maria Cid Rodriguez
- Food Quality and Nutrition Department, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
| | - Miriam Zago
- Centro di ricerca Zootecnia e Acquacoltura (CREA-ZA), Lodi, Italy
| | - Nicola Cologna
- Trentingrana Consorzio dei Caseifici Sociali Trentini s.c.a., Trento, Italy
| | - Andrea Goss
- Trentingrana Consorzio dei Caseifici Sociali Trentini s.c.a., Trento, Italy
| | - Ilaria Carafa
- Food Quality and Nutrition Department, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
| | - Kieran Tuohy
- Food Quality and Nutrition Department, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
| | - Andrea Merz
- Trentingrana Consorzio dei Caseifici Sociali Trentini s.c.a., Trento, Italy
| | - Elena Franciosi
- Food Quality and Nutrition Department, Research and Innovation Centre, Fondazione Edmund Mach (FEM), San Michele all'Adige, Italy
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Levante A, Bertani G, Bottari B, Bernini V, Lazzi C, Gatti M, Neviani E. How new molecular approaches have contributed to shedding light on microbial dynamics in Parmigiano Reggiano cheese. Curr Opin Food Sci 2021. [DOI: 10.1016/j.cofs.2020.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Bonny SQ, Hossain MAM, Uddin SMK, Pulingam T, Sagadevan S, Johan MR. Current trends in polymerase chain reaction based detection of three major human pathogenic vibrios. Crit Rev Food Sci Nutr 2020; 62:1317-1335. [DOI: 10.1080/10408398.2020.1841728] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Sharmin Quazi Bonny
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - M. A. Motalib Hossain
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Syed Muhammad Kamal Uddin
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Thiruchelvi Pulingam
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Suresh Sagadevan
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
| | - Mohd Rafie Johan
- Nanotechnology and Catalysis Research Centre, Institute of Advanced Studies, University of Malaya, Kuala Lumpur, Malaysia
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Microbial Profile Antibacterial Properties and Chemical Composition of Raw Donkey Milk. Animals (Basel) 2020; 10:ani10112001. [PMID: 33143191 PMCID: PMC7694164 DOI: 10.3390/ani10112001] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2020] [Revised: 10/20/2020] [Accepted: 10/28/2020] [Indexed: 11/17/2022] Open
Abstract
The human interest in donkey milk is growing due to its nutritional, functional properties and excellent microbiological quality according to published reports. However, more research needs to be conducted to assess the above variables from various breeds. In the present study, milk samples were collected from 17 Cypriot and six Arcadian healthy Greek donkeys. The microbiological quality, somatic cell counts (SCC), chemical composition analysis, and antimicrobial activity of the samples was assessed. In addition, clustering and identification of the bacterial composition was performed by RAPD-PCR and 16S rDNA sequencing, respectively. The good microbiological quality of the samples as estimated by the total aerobic mesophilic and psychrotrophic counts, which ranged from 2.18 to 2.71 log CFU/mL and from 1.48 to 2.37 log CFU/mL, respectively, was also verified. SCC were below 4.4 log CFU/mL. However, potential pathogenic species of Staphylococcus aureus, Bacillus cereus, and Clostridium spp. were enumerated in the milk of both breeds. The gross chemical composition showed mean values for fat, protein, and lactose from 0.82% to 1.24%, 1.22% to 1.87%, and 6.01% to 6.78%, respectively. All milk samples exhibited an antimicrobial activity against St. haemolyticus and Listeria monocytogenes, although quality control measures should be taken for health and safety prior to human consumption.
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CHOEISOONGNERN T, SIVAMARUTHI BS, SIRILUN S, PEERAJAN S, CHOISET Y, RABESONA H, HAERTLÉ T, CHAIYASUT C. Screening and identification of bacteriocin-like inhibitory substances producing lactic acid bacteria from fermented products. FOOD SCIENCE AND TECHNOLOGY 2020. [DOI: 10.1590/fst.13219] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | | | | | | | - Yvan CHOISET
- Institut National de la Recherche Agronomique, France
| | | | - Thomas HAERTLÉ
- Institut National de la Recherche Agronomique, France; Poznan University of Life Sciences, Poland; Teheran University, Iran
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Bader R, Becila S, Ruiz P, Djeghim F, Sanah I, Boudjellal A, Gatellier P, Portanguen S, Talon R, Leroy S. Physicochemical and microbiological characteristics of El-Guedid from meat of different animal species. Meat Sci 2020; 171:108277. [PMID: 32805642 DOI: 10.1016/j.meatsci.2020.108277] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Revised: 07/09/2020] [Accepted: 08/07/2020] [Indexed: 11/18/2022]
Abstract
El-Guedid is an Algerian traditional meat-based product that is prepared from red meats. It belongs to the wide diversity of salted/dried meat products. This study described the physicochemical and microbiological properties of different products from four animal origins and during all the conservation. Results indicated that these products were mainly characterized by a low moisture with an average decrease of water content between 15.6% and 16.3% for all the samples, and a decrease in water activity ranging from 0.66 to 0.68, while the salt content ranged from 8.8 to 19.3%. A decrease in pH values oscillated from (6.3-6.4) to reach (5.2-5.5) at T0 and T365 consecutively, in all the samples. Microbial analyses revealed the absence of pathogenic bacteria such as Listeria and Salmonella but the sporadic contamination by Staphylococcus aureus up to one month of ripening. Lactic acid bacteria and coagulase negative staphylococci were the dominant populations in El-Guedid with Leuconostoc mesenteroides, Lactobacillus sakei, and Staphylococcus saprophyticus as the main species identified. All these populations decreased along the process and reached low levels (2 log CFU/g) at the end of storage (365 days). The drastic drying of El-Guedid led to safe traditional meat product that could promote its production.
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Affiliation(s)
- Roumeila Bader
- Equipe MaQuaV, Laboratoire BioQuAI, Institut de Nutrition d'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université des Frères Mentouri Constantine 1, 25000, Algeria
| | - Samira Becila
- Equipe MaQuaV, Laboratoire BioQuAI, Institut de Nutrition d'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université des Frères Mentouri Constantine 1, 25000, Algeria.
| | - Philippe Ruiz
- Université Clermont Auvergne, INRAE, MEDIS, Clermont-Ferrand 63000, France
| | - Fairouz Djeghim
- Equipe Elaboration et Transformation de Produits Agro-Alimentaires (T.E.P.A.), Laboratoire de Nutrition et Technologie Alimentaire (L.N.T.A.). INATAA, 25000, Algeria
| | - Ibtissem Sanah
- Equipe MaQuaV, Laboratoire BioQuAI, Institut de Nutrition d'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université des Frères Mentouri Constantine 1, 25000, Algeria
| | - Abdelghani Boudjellal
- Equipe MaQuaV, Laboratoire BioQuAI, Institut de Nutrition d'Alimentation et des Technologies Agro-Alimentaires (INATAA), Université des Frères Mentouri Constantine 1, 25000, Algeria
| | - Philippe Gatellier
- INRAE, UR370 Qualité des Produits Animaux, F-63122 Saint Genès-Champanelle, France
| | - Stéphane Portanguen
- INRAE, UR370 Qualité des Produits Animaux, F-63122 Saint Genès-Champanelle, France
| | - Régine Talon
- Université Clermont Auvergne, INRAE, MEDIS, Clermont-Ferrand 63000, France
| | - Sabine Leroy
- Université Clermont Auvergne, INRAE, MEDIS, Clermont-Ferrand 63000, France
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Evaluation of bacterial communities of Grana Padano cheese by DNA metabarcoding and DNA fingerprinting analysis. Food Microbiol 2020; 93:103613. [PMID: 32912585 DOI: 10.1016/j.fm.2020.103613] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2020] [Revised: 07/27/2020] [Accepted: 07/28/2020] [Indexed: 12/20/2022]
Abstract
The composition of the bacterial community of Grana Padano (GP) cheese was evaluated by an amplicon-based metagenomic approach (DNA metabarcoding) and RAPD-PCR fingerprinting. One hundred eighteen cheeses, which included 118 dairies located in the production area of GP, were collected. Two hundred fifty-four OTUs were detected, of which 82 were further discriminated between dominant (32 OTUs; > 1% total reads) and subdominant (50 OTUs; between 0.1% and 1% total reads) taxa. Lactobacillus (L.) delbrueckii, Lacticaseibacillus (Lact.) rhamnosus, Lact. casei, Limosilactobacillus fermentum, Lactococcus (Lc.) raffinolactis, L. helveticus, Streptococcus thermophilus, and Lc. lactis were the major dominant taxa ('core microbiota'). The origin of samples significantly impacted on both richness, evenness, and the relative abundance of bacterial species, with peculiar pattern distribution among the five GP production regions. A differential analysis allowed to find bacterial species significantly associated with specific region pairings. The analysis of pattern similarity among RAPD-PCR profiles highlighted the presence of a 'core' community banding pattern present in all the GP samples, which was strictly associated with the core microbiota highlighted by DNA metabarcoding. A trend to group samples according to the five production regions was also observed. This study widened our knowledge on the bacterial composition and ecology of Grana Padano cheese.
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Miragoli F, Patrone V, Romaniello F, Rebecchi A, Callegari ML. Development of an S-layer gene-based PCR-DGGE assay for monitoring dominant Lactobacillus helveticus strains in natural whey starters of Grana Padano cheese. Food Microbiol 2020; 89:103457. [DOI: 10.1016/j.fm.2020.103457] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2019] [Revised: 12/11/2019] [Accepted: 02/08/2020] [Indexed: 10/25/2022]
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Bachtarzi N, Speciale I, Kharroub K, De Castro C, Ruiz L, Ruas-Madiedo P. Selection of Exopolysaccharide-Producing Lactobacillus Plantarum ( Lactiplantibacillus Plantarum) Isolated from Algerian Fermented Foods for the Manufacture of Skim-Milk Fermented Products. Microorganisms 2020; 8:E1101. [PMID: 32717902 PMCID: PMC7465087 DOI: 10.3390/microorganisms8081101] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 07/17/2020] [Accepted: 07/21/2020] [Indexed: 01/02/2023] Open
Abstract
The exopolysaccharide (EPS)-producing Lactobacillus plantarum (renamed as Lactiplantibacillus plantarum) LBIO1, LBIO14 and LBIO28 strains, isolated from fermented dairy products typical from Algeria, were characterized to evaluate the impact of the polymers in milk fermentations. Their genomes revealed the presence of two complete eps clusters of the four described for the reference strain WCFS1. Besides, the three strains presented identical sequences of eps3 and eps4 clusters, but LBIO1 and LBIO28 harbour three genes belonging to eps2 which are absent in the LBIO14 genome. The EPS purified from fermented skim-milks manufactured with the strains showed identical nuclear magnetic resonance (1H-NMR) and size exclusion chromatography coupled with a multiangle laser light scattering detector (SEC-MALLS) profiles for polymers LBIO1 and LBIO28, whereas LBIO14 EPS was different due to the lack of the high-molecular weight (HMW)-EPS and the absence of specific monosaccharide's peaks in the anomeric region of its proton NMR spectrum. The presence of the HMW-EPS correlated with optimal sensorial-physical characteristics of the fermented skim-milks (ropy phenotype). Their microstructures, studied by confocal scanning laser microscopy (CSLM), also showed differences in the organization of the casein-network and the distribution of the bacteria inside this matrix. Therefore, the strain LBIO1 can be proposed for the manufacture of dairy products that require high whey retention capability, whereas LBIO28 could be applied to increase the viscosity.
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Affiliation(s)
- Nadia Bachtarzi
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias-Consejo Superior de Investigaciones Científicas (IPLA-CSIC), 33300 Villaviciosa, Asturias, Spain; (N.B.); (L.R.)
- Laboratoire de Recherche Biotechnologie et Qualité des Aliments (BIOQUAL), Institut de la Nutrition, de l’Alimentation et des Technologies Agro Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Constantine 25017, Algeria;
| | - Immacolata Speciale
- Department of Sciences, University of Naples Federico II, 80126 Napoli, Italy;
| | - Karima Kharroub
- Laboratoire de Recherche Biotechnologie et Qualité des Aliments (BIOQUAL), Institut de la Nutrition, de l’Alimentation et des Technologies Agro Alimentaires (INATAA), Université Frères Mentouri Constantine 1 (UFMC1), Constantine 25017, Algeria;
| | - Cristina De Castro
- Department of Agricultural Sciences, University of Naples Federico II, 80055 Portici, Italy;
| | - Lorena Ruiz
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias-Consejo Superior de Investigaciones Científicas (IPLA-CSIC), 33300 Villaviciosa, Asturias, Spain; (N.B.); (L.R.)
- Group Functionality and Ecology of Beneficial Microbes, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Asturias, Spain
| | - Patricia Ruas-Madiedo
- Department of Microbiology and Biochemistry of Dairy Products, Instituto de Productos Lácteos de Asturias-Consejo Superior de Investigaciones Científicas (IPLA-CSIC), 33300 Villaviciosa, Asturias, Spain; (N.B.); (L.R.)
- Group Functionality and Ecology of Beneficial Microbes, Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), 33011 Oviedo, Asturias, Spain
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Sirichoat A, Flórez AB, Vázquez L, Buppasiri P, Panya M, Lulitanond V, Mayo B. Antibiotic Resistance-Susceptibility Profiles of Enterococcus faecalis and Streptococcus spp. From the Human Vagina, and Genome Analysis of the Genetic Basis of Intrinsic and Acquired Resistances. Front Microbiol 2020; 11:1438. [PMID: 32695087 PMCID: PMC7333779 DOI: 10.3389/fmicb.2020.01438] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Accepted: 06/03/2020] [Indexed: 01/01/2023] Open
Abstract
The spread of antibiotic resistance is a major public health concern worldwide. Commensal bacteria from the human genitourinary tract can act as reservoirs of resistance genes playing a role in their transfer to pathogens. In this study, the minimum inhibitory concentration of 16 antibiotics to 15 isolates from the human vagina, identified as Enterococcus faecalis, Streptococcus anginosus, and Streptococcus salivarius, was determined. Eight isolates were considered resistant to tetracycline, five to clindamycin and quinupristin-dalfopristin, and four to rifampicin. To investigate the presence of antimicrobial resistance genes, PCR analysis was performed in all isolates, and five were subjected to whole-genome sequencing analysis. PCR reactions identified tet(M) in all tetracycline-resistant E. faecalis isolates, while both tet(M) and tet(L) were found in tetracycline-resistant S. anginosus isolates. The tet(M) gene in E. faecalis VA02-2 was carried within an entire copy of the transposon Tn916. In S. anginosus VA01-10AN and VA01-14AN, the tet(M) and tet(L) genes were found contiguous with one another and flanked by genes encoding DNA mobilization and plasmid replication proteins. Amplification and sequencing suggested the lsaA gene to be complete in all E. faecalis isolates resistant to clindamycin and quinupristin-dalfopristin, while the gene contain mutations rendering to a non-functional LsaA in susceptible isolates. These results were subsequently confirmed by genome analysis of clindamycin and quinupristin-dalfopristin resistant and susceptible E. faecalis strains. Although a clinical breakpoint to kanamycin for S. salivarius has yet to be established, S. salivarius VA08-2AN showed an MIC to this antibiotic of 128 μg mL-1. However, genes involved in kanamycin resistance were not identified. Under the assayed conditions, neither tet(L) nor tet(M) from either E. faecalis or S. anginosus was transferred by conjugation to recipient strains of E. faecalis, Lactococcus lactis, or Lactobacillus plantarum. Nonetheless, the tet(L) gene from S. anginosus VA01-10AN was amplified by PCR, and cloned and expressed in Escherichia coli, to which it provided a resistance of 48-64 μg mL-1 to tetracycline. Our results expand the knowledge of the antibiotic resistance-susceptibility profiles of vaginal bacteria and provide the genetic basis of their intrinsic and acquired resistance.
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Affiliation(s)
- Auttawit Sirichoat
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Villaviciosa, Spain
- Department of Microbiology, Research and Diagnostic Center for Emerging Infectious Diseases (RCEID), Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Ana Belén Flórez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Villaviciosa, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (IISPA), Oviedo, Spain
| | - Lucía Vázquez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Villaviciosa, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (IISPA), Oviedo, Spain
| | - Pranom Buppasiri
- Department of Obstetrics and Gynecology, Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Marutpong Panya
- College of Medicine and Public Health, Ubon Ratchathani University, Ubon Ratchathani, Thailand
| | - Viraphong Lulitanond
- Department of Microbiology, Research and Diagnostic Center for Emerging Infectious Diseases (RCEID), Faculty of Medicine, Khon Kaen University, Khon Kaen, Thailand
| | - Baltasar Mayo
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Villaviciosa, Spain
- Instituto de Investigación Sanitaria del Principado de Asturias (IISPA), Oviedo, Spain
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Metabolism of Soy Isoflavones by Intestinal Bacteria: Genome Analysis of an Adlercreutzia Equolifaciens Strain That Does Not Produce Equol. Biomolecules 2020; 10:biom10060950. [PMID: 32586036 PMCID: PMC7355428 DOI: 10.3390/biom10060950] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 06/05/2020] [Accepted: 06/20/2020] [Indexed: 12/16/2022] Open
Abstract
Isoflavones are transformed in the gut into more estrogen-like compounds or into inactive molecules. However, neither the intestinal microbes nor the pathways leading to the synthesis of isoflavone-derived metabolites are fully known. In the present work, 73 fecal isolates from three women with an equol-producing phenotype were considered to harbor equol-related genes by qPCR. After typing, 57 different strains of different taxa were tested for their ability to act on the isoflavones daidzein and genistein. Strains producing small to moderate amounts of dihydrodaidzein and/or O-desmethylangolensin (O-DMA) from daidzein and dihydrogenistein from genistein were recorded. However, either alone or in several strain combinations, equol producers were not found, even though one of the strains, W18.34a (also known as IPLA37004), was identified as Adlercreutzia equolifaciens, a well-described equol-producing species. Analysis and comparison of A. equolifaciens W18.34a and A. equolifaciens DSM19450T (an equol producer bacterium) genome sequences suggested a deletion in the former involving a large part of the equol operon. Furthermore, genome comparison of A. equolifaciens and Asaccharobacter celatus (other equol-producing species) strains from databases indicated many of these also showed deletions within the equol operon. The present results contribute to our knowledge to the activity of gut bacteria on soy isoflavones.
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Biolcati F, Andrighetto C, Bottero MT, Dalmasso A. Microbial characterization of an artisanal production of Robiola di Roccaverano cheese. J Dairy Sci 2020; 103:4056-4067. [DOI: 10.3168/jds.2019-17451] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 01/14/2020] [Indexed: 01/26/2023]
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Jarocki P, Komoń-Janczara E, Glibowska A, Dworniczak M, Pytka M, Korzeniowska-Kowal A, Wzorek A, Kordowska-Wiater M. Molecular Routes to Specific Identification of the Lactobacillus Casei Group at the Species, Subspecies and Strain Level. Int J Mol Sci 2020; 21:ijms21082694. [PMID: 32294944 PMCID: PMC7216162 DOI: 10.3390/ijms21082694] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/05/2020] [Accepted: 04/10/2020] [Indexed: 12/12/2022] Open
Abstract
The genus Lactobacillus includes, among others, Lactobacillus casei, Lactobacillus paracasei and Lactobacillus rhamnosus, species that are collectively referred to as the Lactobacillus casei group. Many studies have shown that strains belonging to this group may decrease lactose intolerance, the effects of inflammatory bowel disease, diarrhea, constipation, food allergies and even colon cancer. Moreover, evidences exists of positive effects of these bacteria on mucosal immunity and blood cholesterol level. Because of their beneficial influence on human health, many of them are used as food additives and probiotic pharmaceuticals. It should be stressed that health-promoting properties are not attributed at the species level, but to specific strains. Therefore, procedures are necessary to allow specific identification at each phylogenetic level-genus, species and strain. In this paper we present a practical overview of molecular methods for the identification and differentiation of L. casei bacteria. The research included 30 bacterial strains belonging to three species: L.casei, L. paracasei and L. rhamnosus. Among the tested procedures were genus- and species-specific PCR, multiplex-PCR, Real-Time HRM analysis, RFLP-PCR, rep-PCR, RAPD-PCR, AFLP-PCR, and proteomic methods such as MALDI-TOF MS typing and SDS-PAGE fingerprinting. The obtained results showed that multiplex-PCR and MALDI-TOF MS turned out to be the most useful methods to identify the tested bacteria at the species level. At the strain level, the AFLP-PCR method showed the highest discriminatory power. We hope that the presented results will allow for the easy selection of an appropriate procedure, depending on the experiment conducted and the equipment capabilities of any given laboratory.
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Affiliation(s)
- Piotr Jarocki
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
- Correspondence: (P.J.); (M.K.-W.); Tel.: +48-81462-3351 (P.J.)
| | - Elwira Komoń-Janczara
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Agnieszka Glibowska
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Michał Dworniczak
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Monika Pytka
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
| | - Agnieszka Korzeniowska-Kowal
- Polish Collection of Microorganisms (PCM), Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland; (A.K.-K.); (A.W.)
| | - Anna Wzorek
- Polish Collection of Microorganisms (PCM), Department of Immunology of Infectious Diseases, Hirszfeld Institute of Immunology and Experimental Therapy, Polish Academy of Sciences, Rudolfa Weigla 12, 53-114 Wroclaw, Poland; (A.K.-K.); (A.W.)
| | - Monika Kordowska-Wiater
- Department of Biotechnology, Microbiology and Human Nutrition, University of Life Sciences in Lublin, 8 Skromna St., 20-704 Lublin, Poland; (E.K.-J.); (A.G.); (M.D.); (M.P.)
- Correspondence: (P.J.); (M.K.-W.); Tel.: +48-81462-3351 (P.J.)
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36
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Sirichoat A, Flórez AB, Vázquez L, Buppasiri P, Panya M, Lulitanond V, Mayo B. Antibiotic Susceptibility Profiles of Lactic Acid Bacteria from the Human Vagina and Genetic Basis of Acquired Resistances. Int J Mol Sci 2020; 21:E2594. [PMID: 32276519 PMCID: PMC7178285 DOI: 10.3390/ijms21072594] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2020] [Revised: 04/01/2020] [Accepted: 04/07/2020] [Indexed: 12/29/2022] Open
Abstract
Lactic acid bacteria can act as reservoirs of antibiotic resistance genes that can be ultimately transferred to pathogens. The present work reports on the minimum inhibitory concentration (MIC) of 16 antibiotics to 25 LAB isolates of five Lactobacillus and one Bifidobacterium species from the human vagina. Acquired resistances were detected to kanamycin, streptomycin, chloramphenicol, gentamicin, and ampicillin. A PCR analysis of lactobacilli failed to identify genetic determinants involved in any of these resistances. Surprisingly, a tet(W) gene was detected by PCR in two Bifidobacterium bifidum strains, although they proved to be tetracycline-susceptible. In agreement with the PCR results, no acquired genes were identified in the genome of any of the Lactobacillus spp. strains sequenced. A genome analysis of B. bifidum VA07-1AN showed an insertion of two guanines in the middle of tet(W) interrupting the open reading frame. By growing the strain in the presence of tetracycline, stable tetracycline-resistant variants were obtained. An amino acid substitution in the ribosomal protein S12 (K43R) was further identified as the most likely cause of VA07-1AN being streptomycin resistance. The results of this work expand our knowledge of the resistance profiles of vaginal LAB and provide evidence for the genetic basis of some acquired resistances.
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Affiliation(s)
- Auttawit Sirichoat
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares, s/n, 33300 Villaviciosa, Asturias, Spain; (A.S.); (A.B.F.); (L.V.)
- Department of Microbiology and Research and Diagnostic Center for Emerging Infectious Diseases (RCEID), Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand;
| | - Ana Belén Flórez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares, s/n, 33300 Villaviciosa, Asturias, Spain; (A.S.); (A.B.F.); (L.V.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011 Oviedo, Spain
| | - Lucía Vázquez
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares, s/n, 33300 Villaviciosa, Asturias, Spain; (A.S.); (A.B.F.); (L.V.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011 Oviedo, Spain
| | - Pranom Buppasiri
- Department of Obstetrics and Gynecology, Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand;
| | - Marutpong Panya
- College of Medicine and Public Health, Ubon Ratchathani University, Ubon Ratchathani 34190, Thailand;
| | - Viraphong Lulitanond
- Department of Microbiology and Research and Diagnostic Center for Emerging Infectious Diseases (RCEID), Faculty of Medicine, Khon Kaen University, Khon Kaen 40002, Thailand;
| | - Baltasar Mayo
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (IPLA-CSIC), Paseo Río Linares, s/n, 33300 Villaviciosa, Asturias, Spain; (A.S.); (A.B.F.); (L.V.)
- Instituto de Investigación Sanitaria del Principado de Asturias (ISPA), Avenida de Roma s/n, 33011 Oviedo, Spain
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Structural enterocin gene profiles and mode of antilisterial activity in synthetic liquid media and skim milk of autochthonous Enterococcus spp. isolates from artisan Greek Graviera and Galotyri cheeses. Food Microbiol 2020; 86:103335. [DOI: 10.1016/j.fm.2019.103335] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Revised: 08/28/2019] [Accepted: 09/13/2019] [Indexed: 12/18/2022]
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Santos ADOD, Ávila CLDS, Soares C, Carvalho BF, Schwan RF, Lima N. Lactic acid bacteria diversity in corn silage produced in Minas Gerais (Brazil). ANN MICROBIOL 2019. [DOI: 10.1007/s13213-019-01528-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Abstract
Purpose
The diversity of lactic acid bacteria (LAB) in silages produced in warm climate countries is not well known. This study aimed to identify and characterise the metabolic and genotypic aspects of autochthonous LAB isolated from corn silage produced in the state of Minas Gerais, Brazil.
Methods
Eighty-eight LAB were isolated. To evaluate their performance at the strain level, all isolates were distinguished among strains using random amplified polymorphic DNA polymerase chain reaction (RAPD-PCR) and repetitive extragenic palindromic PCR (REP-PCR) techniques. The organic acid and ethanol production were determined by high-performance liquid chromatography (HPLC).
Result
The fingerprints obtained by RAPD-PCR with a M13 primer were more discriminatory than those obtained with the REP-PCR technique using a (GACA)4 primer. Moreover, 28 representative isolates were identified as Lactobacillus acidophilus, L. buchneri, L. casei, L. diolivorans, L. hilgardii, L. paracasei, L. parafarraginis, L. plantarum, L. rhamnosus, L. zeae and Pediococcus acidilactici. Different fingerprinting profiles between isolates within the same species were observed. However, some strains isolated from different silages showed the same band profile, thus suggesting the presence of clusters with high similar fingerprints in silages from various regions.
Conclusion
A variation in LAB diversity was observed in the silages of the evaluated regions, with L. rhamnosus and L. buchneri showing the highest distribution. Differences in organic acid production were observed among the strains belonging to the same species. This research contributes to a better understanding of the LAB community present in corn silage produced in warm climates. These strains will be studied as potential silage starters.
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Carminati D, Bonvini B, Rossetti L, Zago M, Tidona F, Giraffa G. Investigation on the presence of blue pigment-producing Pseudomonas strains along a production line of fresh mozzarella cheese. Food Control 2019. [DOI: 10.1016/j.foodcont.2019.02.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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41
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Kakabadze E, Zago M, Rossetti L, Bonvini B, Tidona F, Carminati D, Chanishvili N, Giraffa G. Characterisation of lactic acid bacteria isolated from the Georgian, yoghurt‐like Matsoni. INT J DAIRY TECHNOL 2019. [DOI: 10.1111/1471-0307.12589] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Elene Kakabadze
- R & D Department George Eliava Institute of Bacteriophage, Microbiology and Virology Gotua Street 3 0160 Tbilisi Georgia
- Faculty of Exact and Natural Science Tbilisi State University 1, Chavchavadze Ave. 0179 Tbilisi Georgia
| | - Miriam Zago
- CREA Research Centre for Animal Production and Aquaculture (CREA‐ZA) via Lombardo 11 26900 Lodi Italy
| | - Lia Rossetti
- CREA Research Centre for Animal Production and Aquaculture (CREA‐ZA) via Lombardo 11 26900 Lodi Italy
| | - Barbara Bonvini
- CREA Research Centre for Animal Production and Aquaculture (CREA‐ZA) via Lombardo 11 26900 Lodi Italy
| | - Flavio Tidona
- CREA Research Centre for Animal Production and Aquaculture (CREA‐ZA) via Lombardo 11 26900 Lodi Italy
| | - Domenico Carminati
- CREA Research Centre for Animal Production and Aquaculture (CREA‐ZA) via Lombardo 11 26900 Lodi Italy
| | - Nina Chanishvili
- R & D Department George Eliava Institute of Bacteriophage, Microbiology and Virology Gotua Street 3 0160 Tbilisi Georgia
| | - Giorgio Giraffa
- CREA Research Centre for Animal Production and Aquaculture (CREA‐ZA) via Lombardo 11 26900 Lodi Italy
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Vandera E, Kakouri A, Koukkou AI, Samelis J. Major ecological shifts within the dominant nonstarter lactic acid bacteria in mature Greek Graviera cheese as affected by the starter culture type. Int J Food Microbiol 2019; 290:15-26. [DOI: 10.1016/j.ijfoodmicro.2018.09.014] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 07/27/2018] [Accepted: 09/16/2018] [Indexed: 11/25/2022]
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Eraclio G, Ricci G, Moroni P, Santisteban C, Plumed-Ferrer C, Bennett J, Fortina MG. Sand bedding as a reservoir for Lactococcus garvieae dissemination in dairy farms. Can J Microbiol 2019; 65:84-89. [DOI: 10.1139/cjm-2018-0251] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Lactococcus garvieae is now recognized as a species with clinical significance for human and veterinary medicine. The aim of this study was to evaluate the presence of this pathogen in sand bedding and milk samples. Two farms in Minnesota with problems of clinical and subclinical mastitis due to streptococci-like organisms were selected. Twenty-four Lactococcus garvieae isolates from sand bedding and 18 isolates from quarter milk were comparatively studied using a genotypic approach. RAPD (random amplification of polymorphic DNA) PCR and REP (repetitive element palindromic) PCR experiments highlighted a similar electrophoretic profile. When genes belonging to the core genome of L. garvieae were tested through a MLRT (multilocus restriction typing), we again observed that all L. garvieae isolates coming from sand bedding and milk shared a common profile, distinguishable from previously studied representative L. garvieae strains. These data indicate that the L. garvieae isolated from sand bedding and milk originated from a few strains adapted to persist in the same habitat. This supports the hypothesis that sand bedding can represent a reservoir of L. garvieae strains and be a potential vehicle for their dissemination in dairy farms.
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Affiliation(s)
- Giovanni Eraclio
- Department of Food, Environmental and Nutritional Sciences, Division of Food Microbiology and Bioprocesses, Università degli Studi di Milano, Via Celoria 2, 20133 Milan, Italy
| | - Giovanni Ricci
- Department of Food, Environmental and Nutritional Sciences, Division of Food Microbiology and Bioprocesses, Università degli Studi di Milano, Via Celoria 2, 20133 Milan, Italy
| | - Paolo Moroni
- Dipartimento di Medicina Veterinaria, Università degli Studi di Milano, Via Celoria 10, 20133 Milan, Italy
- Animal Health Diagnostic Center, Quality Milk Production Services, Cornell University, 240 Farrier Road, Ithaca, NY 14853, USA
| | - Carlos Santisteban
- Animal Health Diagnostic Center, Quality Milk Production Services, Cornell University, 240 Farrier Road, Ithaca, NY 14853, USA
| | - Carme Plumed-Ferrer
- Food Biotechnology, Institute of Public Health and Clinical Nutrition, University of Eastern Finland, P.O. Box 1627, FI-70210 Kuopio, Finland
| | - James Bennett
- Northern Valley Dairy Production Medicine Center, 900 N Wabasha Plainview, MN 55964, USA
| | - Maria Grazia Fortina
- Department of Food, Environmental and Nutritional Sciences, Division of Food Microbiology and Bioprocesses, Università degli Studi di Milano, Via Celoria 2, 20133 Milan, Italy
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Saticioglu IB, Duman M, Wiklund T, Altun S. Serological and genetic characterization of Flavobacterium psychrophilum isolated from farmed salmonids in Turkey. JOURNAL OF FISH DISEASES 2018; 41:1899-1908. [PMID: 30294785 DOI: 10.1111/jfd.12901] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 08/31/2018] [Accepted: 09/05/2018] [Indexed: 06/08/2023]
Abstract
Turkey was the largest rainbow trout producer of the European countries in 2016, and the reason for this production is mainly attributed to its egg and fry production. Flavobacterium psychrophilum cause the highest rates of mortality in the starting to feeding stages of the fish. In the present study, twenty-five F. psychrophilum isolates recovered from rainbow trout, coruh trout and brook trout were analysed by RAPD-PCR, ERIC-PCR, REP-PCR and PCR-RFLP, including 16S rRNA, gyrA and gyrB gene regions and PCR-based serotyping method. The PCR-based molecular analysis showed that the isolates could not be differentiated exactly according to isolation source and geographical region. Most isolates were of type-1 and type-2, and some of them were of type-0 and type-3; in addition, one isolate showed a unique serotype. The combined analysis results showed that F. psychrophilum isolates discriminated as five different genotypes and all isolates were successfully discriminated based on host.
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Affiliation(s)
- I B Saticioglu
- Aquatic Animal Disease Department, Faculty of Veterinary Medicine, Erciyes University, Kayseri, Turkey
| | - M Duman
- Aquatic Animal Disease Department, Faculty of Veterinary Medicine, Uludag University, Bursa, Turkey
| | - T Wiklund
- Laboratory of Aquatic Pathobiology, Environmental and Marine Biology, Åbo Akademi University, Turku, Finland
| | - S Altun
- Aquatic Animal Disease Department, Faculty of Veterinary Medicine, Uludag University, Bursa, Turkey
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Vaudano E, Quinterno G, Costantini A, Pulcini L, Pessione E, Garcia-Moruno E. Yeast distribution in Grignolino grapes growing in a new vineyard in Piedmont and the technological characterization of indigenous Saccharomyces spp. strains. Int J Food Microbiol 2018; 289:154-161. [PMID: 30245288 DOI: 10.1016/j.ijfoodmicro.2018.09.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 09/14/2018] [Accepted: 09/17/2018] [Indexed: 10/28/2022]
Abstract
The aim of this study was to characterize the yeast consortium isolated from Grignolino grapes in a newly planted vineyard in Piedmont (Italy) via analysis of the intra-vineyard yeast distribution of grape samples from single rows. A two-phase approach allowed the identification of culturable yeasts present on grape skins and, through an enriching procedure via grape fermentation, the isolation of low frequency non-Saccharomyces and Saccharomyces spp. fermentative species, including S. paradoxus, which is highly unusual during grape fermentation, along with the intra-specific characterization of S. cerevisiae isolates. Culture-based molecular techniques revealed a grape yeast microbiota formed by (in order of abundance) Hanseniaspora uvarum, the yeast-like fungus Aerobasidium pullulans, Candida zemplinina, Pichia kluyveri, Candida californica, Curvibasidium cygneicollum, Meyerozima caribbica, Rhodotorula babjevae, Metschnikowia pulcherrima and Cryptococcus flavescens. Technological properties of isolated Saccharomyces spp. strains were analysed, identifying strains, including S. paradoxus, potentially suitable as an ecotypical starter for territorial wines.
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Affiliation(s)
- Enrico Vaudano
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria - Centro di Ricerca Viticoltura ed Enologia, Via Pietro Micca 35, 14100 Asti, Italy.
| | - Giorgia Quinterno
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria - Centro di Ricerca Viticoltura ed Enologia, Via Pietro Micca 35, 14100 Asti, Italy
| | - Antonella Costantini
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria - Centro di Ricerca Viticoltura ed Enologia, Via Pietro Micca 35, 14100 Asti, Italy
| | - Laura Pulcini
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria - Centro di Ricerca Viticoltura ed Enologia, Via Pietro Micca 35, 14100 Asti, Italy
| | - Enrica Pessione
- Università di Torino - Dipartimento di Scienze della Vita e Biologia dei Sistemi, Via Accademia Albertina 13, 10123 Torino, Italy
| | - Emilia Garcia-Moruno
- Consiglio per la ricerca in agricoltura e l'analisi dell'economia agraria - Centro di Ricerca Viticoltura ed Enologia, Via Pietro Micca 35, 14100 Asti, Italy
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Biscola V, Choiset Y, Rabesona H, Chobert JM, Haertlé T, Franco BDGM. Brazilian artisanal ripened cheeses as sources of proteolytic lactic acid bacteria capable of reducing cow milk allergy. J Appl Microbiol 2018; 125:564-574. [PMID: 29654625 DOI: 10.1111/jam.13779] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Revised: 02/16/2018] [Accepted: 03/23/2018] [Indexed: 01/16/2023]
Abstract
AIM The objective was to obtain lactic acid bacteria (LAB) capable of hydrolysing immunoreactive proteins in milk, to optimize the hydrolysis, to determine the proteolysis kinetics and to test the safety of the best hydrolytic strain. METHODS AND RESULTS Brazilian cheese was used as source of LAB capable of hydrolysing main milk allergens. Proteolytic isolates were submitted to RAPD-PCR for the characterization of clonal diversity. Optimized hydrolysis was strain and protein fraction dependent. 16S rDNA sequencing identified three proteolytic strains: Enterococcus faecalis VB43, that hydrolysed αS1 -, αS2 - and β-caseins, α-lactalbumin and β-lactoglobulin (partial hydrolysis), and Pediococcus acidilactici VB90 and Weissella viridescens VB111, that caused partial hydrolysis of αS1 - and αS2 -caseins. Enterococcus faecalis VB43 tested negative for virulence genes asa1, agg, efaA, hyl, esp, cylLL and cylLS but positive for genes ace and gelE. Ethylenediamine tetra-acetic acid inhibited the proteolysis, indicating that the main proteases of E. faecalis VB43 are metalloproteases. CONCLUSION Brazilian artisanal cheese is a good source of LAB capable of hydrolysing allergenic proteins in milk. One isolate (E. faecalis VB43) presented outstanding activity against these proteins and lacked most of the tested virulence genes. SIGNIFICANCE AND IMPACT OF THE STUDY Enterococcus faecalis VB43 presents good potential for the manufacture of hypoallergenic dairy products.
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Affiliation(s)
- V Biscola
- Food Research Center, Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of São Paulo, Sao Paulo, SP, Brazil.,UR 1268 Biopolymères Interactions Assemblages, INRA, Protein Functions and Interactions Research Team, Nantes Cedex, France
| | - Y Choiset
- UR 1268 Biopolymères Interactions Assemblages, INRA, Protein Functions and Interactions Research Team, Nantes Cedex, France
| | - H Rabesona
- UR 1268 Biopolymères Interactions Assemblages, INRA, Protein Functions and Interactions Research Team, Nantes Cedex, France
| | - J-M Chobert
- UR 1268 Biopolymères Interactions Assemblages, INRA, Protein Functions and Interactions Research Team, Nantes Cedex, France
| | - T Haertlé
- UR 1268 Biopolymères Interactions Assemblages, INRA, Protein Functions and Interactions Research Team, Nantes Cedex, France.,Department of Animal Nutrition and Feed Management, Poznan University of Life Sciences, Poznań, Poland
| | - B D G M Franco
- Food Research Center, Department of Food and Experimental Nutrition, Faculty of Pharmaceutical Sciences, University of São Paulo, Sao Paulo, SP, Brazil
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Blaiotta G, Murru N, Di Cerbo A, Romano R, Aponte M. Production of probiotic bovine salami using Lactobacillus plantarum 299v as adjunct. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:2285-2294. [PMID: 28990658 DOI: 10.1002/jsfa.8717] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 09/08/2017] [Accepted: 10/02/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Five probiotic lactobacilli were tested, alone or in combination with two commercial starters, to select the most suitable strain for a probiotic bovine salami production. Lactobacillus plantarum 299v was used with both starters, to make salami according to a traditional recipe. Salami obtained by using just the starters and by spontaneous fermentation, served as control. Microbial dynamics, as well as the main physico-chemical parameters, were monitored throughout ripening. The survival of probiotic 299v was confirmed by strains' tracking by means of RAPD-PCR coupled to a culture-independent approach PCR-DGGE-based. RESULTS The results showed a remarkable viability of the probiotic strain even after 60 days of storage. Experimental salami exhibited the same level of sensory acceptance of control salami, were hygienically safe, and characterised by pH, weight loss and microbiological loads within the ranges conventionally advocated for optimal fermented sausages. CONCLUSION Outcomes indicate the workable possibility of using second-quality beef cuts for probiotic salami production. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Giuseppe Blaiotta
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, (NA), Italy
| | - Nicoletta Murru
- Dipartimento di Medicina Veterinaria e Produzione Animali, Universita degli Studi di Napoli Federico II, Naples, Italy
| | - Alessandro Di Cerbo
- Dipartimento di Chirurgia Generale e Specialità Chirurgiche, Università degli Studi di Modena e Reggio Emilia, Modena, Italy
| | - Raffaele Romano
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, (NA), Italy
| | - Maria Aponte
- Dipartimento di Agraria, Università degli Studi di Napoli Federico II, Portici, (NA), Italy
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Isolation and characterization of microorganisms and volatiles associated with Moroccan saffron during different processing treatments. Int J Food Microbiol 2018; 273:43-49. [PMID: 29574333 DOI: 10.1016/j.ijfoodmicro.2018.03.014] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Revised: 03/17/2018] [Accepted: 03/19/2018] [Indexed: 11/22/2022]
Abstract
Saffron may be spoiled by a variety of microorganisms during cultivation, harvesting, and post harvesting. As saffron can be dried and stored in different ways, this preliminary study explored the natural microbiota present in Moroccan saffron when subjected to different drying techniques. An analysis of the carotenoid-derived volatiles present in the saffron was also carried out. The culturable microbiota of the saffron samples dried using different methods, namely in the shade (also called natural), in the sun, or in the oven, were studied using classical and molecular approaches. The effect of the drying methods on head-space chemical volatiles was also determined. Eighty-two isolates grown in the different culture media were chosen from the colonies, and genotype analysis grouped the microorganisms into 58 clusters, revealing a wide diversity. Out of the 82 isolates, 75 belonged to the Bacillaceae family. The other isolates were distributed within the Dietziaceae, Paenibacillaceae and Carnobacteriaceae families. The dominant species was Bacillus simplex, which was detected in all samples, regardless of the drying method used. Lysinibacillus macroides was dominant in the sun-dried saffron. No pathogens were isolated, but an isolate belonging to Dietzia maris, a potential human pathogenic species, was detected. The biodiversity indexes were linked to the drying method and generally decreased as the intensity of the treatment increased. The results of this preliminary work show that the different drying methods strongly influenced the microbiota and affect the saffron volatile profile. Further analysis will be needed to determine possible effects of selected microbiota on saffron volatiles.
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Abbasian F, Ghafar-Zadeh E, Magierowski S. Microbiological Sensing Technologies: A Review. Bioengineering (Basel) 2018; 5:E20. [PMID: 29498670 PMCID: PMC5874886 DOI: 10.3390/bioengineering5010020] [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: 12/07/2017] [Revised: 02/23/2018] [Accepted: 02/23/2018] [Indexed: 12/13/2022] Open
Abstract
Microorganisms have a significant influence on human activities and health, and consequently, there is high demand to develop automated, sensitive, and rapid methods for their detection. These methods might be applicable for clinical, industrial, and environmental applications. Although different techniques have been suggested and employed for the detection of microorganisms, and the majority of these methods are not cost effective and suffer from low sensitivity and low specificity, especially in mixed samples. This paper presents a comprehensive review of microbiological techniques and associated challenges for bioengineering researchers with an engineering background. Also, this paper reports on recent technological advances and their future prospects for a variety of microbiological applications.
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Affiliation(s)
- Firouz Abbasian
- Biologically Inspired Sensors and Actuators Laboratory, Department of EECS, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada.
| | - Ebrahim Ghafar-Zadeh
- Biologically Inspired Sensors and Actuators Laboratory, Department of EECS, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada.
| | - Sebastian Magierowski
- Biologically Inspired Sensors and Actuators Laboratory, Department of EECS, Lassonde School of Engineering, York University, Toronto, ON M3J 1P3, Canada.
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Flórez AB, Mayo B. Antibiotic Resistance-Susceptibility Profiles of Streptococcus thermophilus Isolated from Raw Milk and Genome Analysis of the Genetic Basis of Acquired Resistances. Front Microbiol 2017; 8:2608. [PMID: 29312272 PMCID: PMC5744436 DOI: 10.3389/fmicb.2017.02608] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2017] [Accepted: 12/14/2017] [Indexed: 12/26/2022] Open
Abstract
The food chain is thought to play an important role in the transmission of antibiotic resistances from commensal and beneficial bacteria to pathogens. Streptococcus thermophilus is a lactic acid bacterium of major importance as a starter for the dairy industry. This study reports the minimum inhibitory concentration (MIC) of 16 representative antimicrobial agents to 41 isolates of S. thermophilus derived from raw milk. Strains showing resistance to tetracycline (seven), erythromycin and clindamycin (two), and streptomycin and neomycin (one) were found. PCR amplification identified tet(S) in all the tetracycline-resistant strains, and ermB in the two erythromycin/clindamycin-resistant strains. Hybridisation experiments suggested each resistance gene to be located in the chromosome with a similar genetic organization. Five antibiotic-resistant strains -two resistant to tetracycline (St-2 and St-9), two resistant to erythromycin/clindamycin (St-5 and St-6), and one resistant to streptomycin/neomycin (St-10)- were subjected to genome sequencing and analysis. The tet(S) gene was identified in small contigs of 3.2 and 3.7 kbp in St-2 and St-9, respectively, flanked by truncated copies of insertion sequence (IS) elements. Similarly, ermB in St-6 and St-5 was found in contigs of 1.6 and 28.1 kbp, respectively. Sequence analysis and comparison of the largest contig showed it to contain three segments (21.9, 3.7, and 1.4 kbp long) highly homologous to non-collinear sequences of pRE25 from Enterococcus faecalis. These segments contained the ermB gene, a transference module with an origin of transfer (oriT) plus 15 open reading frames encoding proteins involved in conjugation, and modules for plasmid replication and segregation. Homologous stretches were separated by short, IS-related sequences, resembling the genetic organization of the integrative and conjugative elements (ICEs) found in Streptococcus species. No gene known to provide aminoglycoside resistance was seen in St-10. Four strain-specific amino acid substitutions in the RsmG methyltransferase were scored in this strain; these might be associated to its streptomycin/neomycin resistance. Under yogurt manufacturing and storage conditions, no transfer of either tet(S) or ermB from S. thermophilus to L. delbrueckii was detected. The present results contribute toward characterisation of the antibiotic resistance profiles in S. thermophilus, provide evidence for the genetic basis of acquired resistances and deepen on their transference capability.
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Affiliation(s)
| | - Baltasar Mayo
- Departamento de Microbiología y Bioquímica, Instituto de Productos Lácteos de Asturias (CSIC), Paseo Río Linares s/n, Asturias, Spain
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