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Senoussi A, Aissaoui-Zitoun O, Chenchouni H, Senoussi S, Saoudi Z, Pediliggieri C, Zidoune MNE, Carpino S. Microbial screening of animal skin bags used in traditional cheesemaking. Int J Food Microbiol 2024; 411:110549. [PMID: 38157636 DOI: 10.1016/j.ijfoodmicro.2023.110549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Revised: 11/19/2023] [Accepted: 12/19/2023] [Indexed: 01/03/2024]
Abstract
Bouhezza is a traditional Algerian cheese produced and ripened in goatskin bags called Djeld. The aim of this study was to characterize the microbial ecosystem from Djeld (fresh and dried Djeld for making Bouhezza cheese) and the changes introduced by Lben microflora during its preparation and to identify its role in cheesemaking and its safety. Two replicates of fresh and dried skin bags (FS and DS) were sampled and analyzed before and after contact with Lben. The microbiological results showed no pathogens. Skins observed before the addition of Lben were less populated 2.86 and 3.20 log CFU cm-2 than skins examined after the addition of Lben (approximately 6.0 log CFU cm-2), suggesting a potential role of Lben in releasing some microorganisms into the skin during its time in the Djeld. However, an increase in mesophilic lactic acid bacteria and yeasts was observed in Lben after different periods of interaction with the skin. PCR-TTGE revealed the predominance of lactic acid bacteria (Lactiplantibacillus plantarum, Limosilactobacillus fermentum, Staphylococcus equorum subsp. linens, Lactococcus cremoris, Streptococcus thermophilus) and a few high-GC-content bacteria (Lacticaseibacillus paracasei, Brevibacterium casei). Transfer of several microbial species was observed between the goatskin bag biofilm and Lben during the overnight interaction. Bands corresponding to Lacticaseibacillus paracasei, Brevibacterium casei, and Lactobacillus delbrueckii subsp. lactis were detected in the fresh skin profile and in Lben after contact with the fresh skin. Lacticaseibacillus paracasei was found in dried skin and Lben after contact with dry skin. Lactobacillus helveticus and Enterococcus faecalis appeared in the Lben profile and persisted in Lben and the biofilm-covered dry skin after interaction. These results demonstrate an exchange of specific microbial populations between goatskin bag biofilm and Lben during the traditional preparation method, suggesting that the diversity of goatskin biofilm contributes to the microbial diversity of Lben used in the production of Bouhezza cheese.
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Affiliation(s)
- Asma Senoussi
- Department of Applied Biology, Faculty of Exact Sciences and Nature and Life Sciences, University of Larbi Tebessi - Tebessa, 12002, Tebessa, Algeria; Laboratoire de Nutrition et Technologies Alimentaires (LNTA), Equipe "TEPA", INATAA, University of Constantine 1, 25000 Constantine, Algeria.
| | - Ouarda Aissaoui-Zitoun
- Laboratoire de Génie Agro-Alimentaire (GeniAAl), INATAA, University of Constantine 1, 25000 Constantine, Algeria
| | - Haroun Chenchouni
- Laboratory of Algerian Forests and Climate Change, Higher National School of Forests, 40000 Khenchela, Algeria; Laboratory of Natural Resources and Management of Sensitive Environments 'RNAMS', University of Larbi Ben M'hidi, 04000 Oum El Bouaghi, Algeria.
| | - Sana Senoussi
- Faculty of Exact Sciences and Nature and Life Sciences, University of Larbi Ben M'hidi, 04000 Oum El Bouaghi, Algeria
| | - Zineddine Saoudi
- Laboratoire de Génie Agro-Alimentaire (GeniAAl), INATAA, University of Constantine 1, 25000 Constantine, Algeria
| | | | - Mohammed Nasser-Eddine Zidoune
- Laboratoire de Nutrition et Technologies Alimentaires (LNTA), Equipe "TEPA", INATAA, University of Constantine 1, 25000 Constantine, Algeria
| | - Stefania Carpino
- Department of Central Inspectorate for Fraud Repression and Quality Protection of the Agri-food Products and Foodstuffs (ICQRF), Laboratory of Perugia, 06128 Perugia, Italy
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2
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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] [What about the content of this article? (0)] [Affiliation(s)] [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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Hadef S, Idoui T, Sifour M, Genay M, Dary-Mourot A. Screening of Wild Lactic Acid Bacteria from Algerian Traditional Cheeses and Goat Butter to Develop a New Probiotic Starter Culture. Probiotics Antimicrob Proteins 2023; 15:387-399. [PMID: 36307627 DOI: 10.1007/s12602-022-10000-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/18/2022] [Indexed: 11/24/2022]
Abstract
Twenty-five lactic acid bacterial (LAB) strains have been isolated from traditional goat butter and three types of cheese (dry Klila, frech Klila, and Bouhezza) and evaluated for technological abilities, probiotic properties, and potentials as starter cultures. The twenty-five LAB strains comprised eight strains belonging to Lactobacillus, four strains belonging to Lactococcus, eleven strains belonging to Enterococcus, and two strains belonging to Leuconostoc. A non-hierarchical cluster analysis was performed in order to select the performing strains. After carrying out the preliminary phenotypic characterizations and the probiotic potential, three strains designated as BM10, B15, and C30 belonging to the genus Lactobacillus and Enterococcus with good tolerance to acidity were selected. The strains showed a significant resistance to 0.5% bile salts and 0.4% phenol. Hemolytic activity was not detected; in addition, good hydrophobicity and autoaggregation was obtained. A significant antimicrobial activity was exhibited by all selected strains against Listeria innocua. Genotypic identification by 16S rRNA allowed the identification of B15, BM10, and C30 as Lactobacillus plantarum, Lactobacillus casei, and Enterococcus durans, respectively. The results of the current study suggest that the strains isolated from Algerian fermented dairy products have high potential as probiotic starter cultures in the goat butter and cheese industry.
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Affiliation(s)
- Sawsen Hadef
- Department of Nature and Life Sciences, Abdelhafid Boussouf University Center, RP. 26, 43000, Mila, Algeria.
- Laboratory of Biotechnology, Environment and Health, University Mohamed Seddik Benyahia of Jijel, 18000, Jijel, Algeria.
| | - Tayeb Idoui
- Laboratory of Biotechnology, Environment and Health, University Mohamed Seddik Benyahia of Jijel, 18000, Jijel, Algeria
| | - Mohamed Sifour
- Laboratory of Molecular Toxicology, Faculty of Nature and Life Sciences, University Mohamed Seddik Benyahia of Jijel, 18000, Jijel, Algeria
| | - Magali Genay
- CALBINOTOX, University of Lorraine, 54000, Nancy, France
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Alphonse DW, Baké Marie Thérèse SO, Gwladys K, Philippe S, Karim Issiaka YA, Souaïbou F, Joseph HD, Jacques M, Rock M, Marc P, Eméric MY, Caroline D, Marie-Louise S, Antoine C, Paulin A. Processing and preservation methods of Wagashi Gassirè, a traditional cheese produced in Benin. Heliyon 2022; 8:e10605. [PMID: 36158106 PMCID: PMC9489737 DOI: 10.1016/j.heliyon.2022.e10605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2022] [Revised: 07/01/2022] [Accepted: 09/07/2022] [Indexed: 10/30/2022] Open
Abstract
Purpose Wagashi Gassirè (WG) is a traditional cheese produced from cow milk following local processing methods in Benin. The aim of this study was to describe the milk processing methods and the preservation practices with the objective of improving WG production and sanitary quality. Methods A survey was carried out among 390 actors (84 dairy farmers, 165 producers, 53 traders, and 88 consumers) from two municipalities (Dassa and Nikki) in Benin. Results WG is highly preferred by consumers for its whiteness (63.0%), softness (24.7%), smoothness (19.2%), and firmness (13.7%). WG production is based on the coagulation of milk using Calotropis procera extracts as coagulant. Six milk processing methods, including three new WG production methods were identified, depending on how the C. procera extracts were pre-treated and used during WG production. Boiling (67%) was the most widely used as WG preservation method. The use of aluminium cooking pots (100% of WG producers), WG open-air production (66.7% of producers) and antibiotic misuse (59.3% of dairy farmers) may lead to the chemical or microbiological contamination of WG. Conclusions Six WG production and six preservation methods were identified after the survey among WG producers and traders. Future studies should assess the sanitary and physico-chemical quality of WG from the identified processing and preservation methods. The next step of research should be also focused on the development of specific standards to produce a better quality of WG.
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Affiliation(s)
- Dossou Wanignon Alphonse
- Department of Food Science & FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium.,Laboratory of Food Sciences, Faculty of Agronomic Sciences, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Seko Orou Baké Marie Thérèse
- Laboratory of Analysis of Social Dynamics and Development, Faculty of Agronomic Sciences, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Komagbe Gwladys
- Research Unit on Communicable Diseases, Polytechnic School of Abomey-Calavi, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Sessou Philippe
- Research Unit on Communicable Diseases, Polytechnic School of Abomey-Calavi, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Youssao Abdou Karim Issiaka
- Laboratory of Animal Biotechnology and Meat Technology, Polytechnic School of Abomey-Calavi, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Farougou Souaïbou
- Research Unit on Communicable Diseases, Polytechnic School of Abomey-Calavi, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Hounhouigan Djidjoho Joseph
- Laboratory of Food Sciences, Faculty of Agronomic Sciences, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Mahillon Jacques
- Laboratory of Food and Environmental Microbiology, Faculty of Bioscience Engineering, Catholic University of Louvain, Louvain-la-Neuve, Belgium
| | - Mongbo Rock
- Laboratory of Analysis of Social Dynamics and Development, Faculty of Agronomic Sciences, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Poncelet Marc
- Observing Recomposing Worlds, Faculty of Social Sciences, University of Liège, Liège, Belgium
| | - Madode Yann Eméric
- Laboratory of Food Sciences, Faculty of Agronomic Sciences, University of Abomey-Calavi, Abomey-Calavi, Benin
| | - Douny Caroline
- Department of Food Science & FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Scippo Marie-Louise
- Department of Food Science & FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Clinquart Antoine
- Department of Food Science & FARAH, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | - Azokpota Paulin
- Laboratory of Food Sciences, Faculty of Agronomic Sciences, University of Abomey-Calavi, Abomey-Calavi, Benin
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5
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Jahansepas A, Aghazadeh M, Rezaee MA, Heidarzadeh S, Mardaneh J, Mohammadzadeh A, Pouresmaeil O. Prevalence, Antibiotic Resistance and Virulence of Enterococcus spp. Isolated from Traditional Cheese Types. Ethiop J Health Sci 2022; 32:799-808. [PMID: 35950059 PMCID: PMC9341016 DOI: 10.4314/ejhs.v32i4.17] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Indexed: 11/17/2022] Open
Abstract
Background Enterococci are naturally found in the gastrointestinal (GI) tract of animals and humans, as well as animal-derived foods and vegetables. We here aimed to determine the prevalence, antibiotic resistance, and virulence determinants of E. faecium and E. faecalis in traditional cheese in the North-west of Iran. Materials and Methods Fifty specimens of popular traditional cheese from dairy stores of Urmia and Tabriz, Iran, were collected. Identification of the genus and species of enterococci was done using molecular and phenotypic techniques. Results Forty-eight (96 %) of 50 traditional cheese samples were harboring Enterococcus spp, including Enterococcus faecalis (n= 40; 83.33 %) and E. faecium (n= 8; 16.67 %). The prevalence of enterococci ranged from 1.1×105 to 9.7×104 CFU/g, and 1.1×103 to 9.8×103 CFU/g in Urmia and Tabriz samples, respectively. Rifampicin resistance (n= 38; 79.2 %) was the most common pattern observed in the susceptibility test, which was followed by quinupristin/dalfopristin (n= 33; 68.75 %). Among E. faecalis isolates, cpd (100 %), ace (92.5 %) and gelE (87.5 %), and among E. faecium isolates, gelE (100 %) and asa1 (75 %) were found to have the most common virulence genes. Conclusion E. faecalis was the predominant species, displaying more virulence determinants. It also had high antibiotic resistance, as compared to E. faecium. The enterococci identified here commonly expressed virulence and antibiotic resistance determinants. So, it is required to improve the maintenance and production quality of traditional cheese to avoid enterococci contamination.
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Affiliation(s)
- Ali Jahansepas
- Reference Laboratory, Imam Khomeini Hospital, Urmia University of Medical Sciences, Urmia, Iran
| | - Mohammad Aghazadeh
- Infectious and Tropical Diseases Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Clinical Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mohammad Ahangarzadeh Rezaee
- Infectious and Tropical Diseases Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran.,Department of Clinical Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Siamak Heidarzadeh
- Department of Microbiology and Virology, School of Medicine, Zanjan University of Medical Sciences, Zanjan, Iran
| | - Jalal Mardaneh
- Department of Microbiology, School of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
| | - Alireza Mohammadzadeh
- Department of Microbiology, School of Medicine, Infectious Diseases Research Center, Gonabad University of Medical Sciences, Gonabad, Iran
| | - Omid Pouresmaeil
- Department of Microbiology and Virology, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.,Student Research Committee, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
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Martín I, Rodríguez A, Alía A, Martínez-Blanco M, Lozano-Ojalvo D, Córdoba JJ. Control of Listeria monocytogenes growth and virulence in a traditional soft cheese model system based on lactic acid bacteria and a whey protein hydrolysate with antimicrobial activity. Int J Food Microbiol 2022; 361:109444. [PMID: 34749186 DOI: 10.1016/j.ijfoodmicro.2021.109444] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 10/08/2021] [Accepted: 10/17/2021] [Indexed: 12/26/2022]
Abstract
"Torta del Casar" is a Spanish soft-ripened cheese made with sheep's raw milk and subjected to a short ripening process, which favors the growth of pathogenic microorganisms including Listeria monocytogenes. The development of strategies to control pathogens and minimize health risks associated with the presence of L. monocytogenes in these products is of great interest. In this regard, the anti-Listeria activity of a whey protein hydrolysate (ProH) alone or combined with six lactic acid bacteria strains isolated from cheese was evaluated in this study as a biocontrol strategy using a "Torta del Casar" cheese-based medium. The most active combinations of lactic acid bacteria assayed induced a reduction higher than two logarithmic units in the growth of L. monocytogenes (serotype 4b) compared to their respective control when they were co-inoculated in "Torta del Casar" cheese-based medium at 7 °C for 7 days. In addition, the observed downregulation of some key virulence genes of L. monocytogenes suggests that the strain Lactiplantibacillus plantarum B2 alone and combined with the strain Lactiplantibacillus spp. B4 are good candidates to be used as biocontrol agents against L. monocytogenes growth in traditional soft cheeses based on raw milk during their storage at refrigeration temperatures.
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Affiliation(s)
- Irene Martín
- Food Hygiene and Safety, Meat and Meat Products Research Institute, Faculty of Veterinary Science, University of Extremadura, Avda. de las Ciencias, s/n, 10003 Cáceres, Spain
| | - Alicia Rodríguez
- Food Hygiene and Safety, Meat and Meat Products Research Institute, Faculty of Veterinary Science, University of Extremadura, Avda. de las Ciencias, s/n, 10003 Cáceres, Spain.
| | - Alberto Alía
- Food Hygiene and Safety, Meat and Meat Products Research Institute, Faculty of Veterinary Science, University of Extremadura, Avda. de las Ciencias, s/n, 10003 Cáceres, Spain
| | - Mónica Martínez-Blanco
- Instituto de Investigación en Ciencias de la Alimentación (CIAL) (CSIC-UAM), Madrid, Spain
| | - Daniel Lozano-Ojalvo
- Instituto de Investigación en Ciencias de la Alimentación (CIAL) (CSIC-UAM), Madrid, Spain
| | - Juan J Córdoba
- Food Hygiene and Safety, Meat and Meat Products Research Institute, Faculty of Veterinary Science, University of Extremadura, Avda. de las Ciencias, s/n, 10003 Cáceres, Spain
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7
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Sri Prabakusuma A, Zhu J, Shi Y, Ma Q, Zhao Q, Yang Z, Xu Y, Huang A. Prevalence and antimicrobial resistance profiling of Staphylococcus aureus isolated from traditional cheese in Yunnan, China. 3 Biotech 2022; 12:1. [PMID: 34926114 PMCID: PMC8639989 DOI: 10.1007/s13205-021-03072-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Accepted: 11/22/2021] [Indexed: 01/03/2023] Open
Abstract
The prevalence of staphylococcal infection and the emergence of multidrug resistance of Staphylococcus aureus (S. aureus) are major concerns in food safety and public health. This study aimed to investigate the prevalence of S. aureus isolated from traditional Chinese Rubing and Rushan cheese, antimicrobial resistance profiles, genomic characteristics, and predict antimicrobial resistance genes (ARGs). From 124 samples, 18 of 62 (29.03%) of Rubing and 5 of 62 (8.06%) of Rushan cheese were confirmed to be S. aureus positive by standard culture-based methods. Twenty-three coagulase-positive staphylococci isolates were grouped into 16 clusters by pulsed-field gel electrophoresis and subjected to routine susceptibility testing to 12 antibiotics. Those isolates exhibited high resistance to penicillin (100%), erythromycin, trimethoprim-sulphamethoxazole (34.78%), oxacillin, clindamycin, and cefoxitin (21.74%). Multidrug-resistant (MDR) S. aureus was found in 34.78% (8 of 23) of isolates. Further, S. aureus strain DC.RB_015 isolated from Rubing cheese, recognized as the most resistant to six antibiotics, was selected for whole-genome sequencing (WGS), continued with in silico approaches. S. aureus DC.RB_015 had a single chromosome size of 2,794,578 bp and a plasmid size of 22,961 bp. The strain harbored 18 predicted ARGs, including eight efflux pump genes (mepA, tet(K), arlR, arlS, norA, mgrA, tet(38), LmrS), one peptidoglycan biosynthesis gene (bacA), two β-lactams resistance genes (mecA, blaZ), and seven genes conferring other antimicrobial resistance (APH(3')-IIIa, aad(6), ErmB, SAT-4, mecR1, GlpT, murA). The results of this study expand the knowledge of S. aureus strain DC.RB_015, increase food safety awareness, and will be helpful in establishing therapeutic therapy. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s13205-021-03072-4.
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Affiliation(s)
- Adhita Sri Prabakusuma
- Department of Food Technology, Faculty of Industrial Technology, Universitas Ahmad Dahlan, Yogyakarta, 55166 Indonesia
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Jingjing Zhu
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Yanan Shi
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Qingwen Ma
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Qiong Zhao
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
| | - Zushun Yang
- Yunnan Center for Disease Control and Prevention (CDC), Kunming, 650100 Yunnan China
| | - Yan Xu
- Yunnan Center for Disease Control and Prevention (CDC), Kunming, 650100 Yunnan China
| | - Aixiang Huang
- College of Food Science and Technology, Yunnan Agricultural University, Kunming, 650201 China
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8
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Centorotola G, Sperandii AF, Tucci P, D'Alterio N, Ricci L, Goffredo E, Mancini ME, Iannetti L, Salini R, Migliorati G, Pomilio F, Valiani A, Ortenzi R, Lanni L. Survival rate of Escherichia coli O157 in artificially contaminated raw and thermized ewe milk in different Pecorino cheese production processes. Int J Food Microbiol 2021; 347:109175. [PMID: 33812165 DOI: 10.1016/j.ijfoodmicro.2021.109175] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 02/04/2021] [Accepted: 03/20/2021] [Indexed: 11/24/2022]
Abstract
Pecorino is a typical Italian cheese, mostly produced in central and southern Italy regions using ewe raw milk and following traditional procedures. The use of raw milk constitutes a risk linked to the potential survival or multiplication of pathogenic microorganisms, as Shiga toxin-producing Escherichia coli (STEC). The aim of this study was to compare different Italian traditional Pecorino production methods to determine if there were any phases that could influence the Escherichia coli O157 survival rate, but also if they could negatively influence lactic acid bacteria survival rate, during the phases of production and ripening. Therefore batches of Pecorino cheese were prepared using different production methods, representing the real and typical cheese production in southern and central Italy regions: 1) heating the milk at 37 °C for about 40 min before curding, 2) heating the milk at 60 °C (thermization) for 13 min, so that the alkaline phosphatase reaction is still positive before curding, 3) cooking curd at 41 °C and 4) at 45 °C, both for 5 min. Our results demonstrated that traditional milk treatments different from pasteurization can help but do not eliminate serious microbiological treats, as E. coli O157, especially if the raw milk is heavily contaminated. The heat treatment at 60 °C applied to raw milk was able to decrease the concentration of E. coli O157 of 1.7 log10CFU/ml and, according to the inactivation slope, it would be further reduced prolonging the heating treatment. The results obtained also showed that, during the Pecorino cheese ripening, E. coli O157 was always enumerable for 60 days, remaining detectable after 90 days of ripening.
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9
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Jahansepas A, Sharifi Y, Aghazadeh M, Ahangarzadeh Rezaee M. Comparative analysis of Enterococcus faecalis and Enterococcus faecium strains isolated from clinical samples and traditional cheese types in the Northwest of Iran: antimicrobial susceptibility and virulence traits. Arch Microbiol 2019; 202:765-772. [PMID: 31822952 DOI: 10.1007/s00203-019-01792-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Revised: 11/29/2019] [Accepted: 12/03/2019] [Indexed: 01/07/2023]
Abstract
This research was conducted using 50 samples of popular traditional cheeses and 160 enterococcal clinical isolates. Phenotypic and genotypic methods used for identification of enterococci. Then, the incidences of antibacterial resistance and virulence traits were investigated. In total, 165 E. faecalis and 43 E. faecium obtained from traditional cheeses and different clinical isolates were analyzed in the study. Antibiotic susceptibility testing revealed 175(84.1%) isolates with multi-drug resistance (MDR) patterns, which was more common among clinical sources. The predominant virulence profile, including gelE, asa1 and cpd was detected within 47 (22.6%) of the MDR isolates. Our results showed that traditional cheeses and clinical E. faecalis isolates have distinct patterns of virulence traits. The identified enterococci with antibiotic resistance and associated virulence factors, could provide a potential risk to the public health.
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Affiliation(s)
- Ali Jahansepas
- Infectious and Tropical Diseases Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran
- Department of Clinical Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Yaeghob Sharifi
- Department of Microbiology, Faculty of Medicine, Urmia University of Medical Sciences, Nazlou road, Urmia, West Azarbyjan, Iran.
- Cellular and Molecular Research Center, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran.
| | - Mohammad Aghazadeh
- Department of Clinical Microbiology, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran
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Benheddi W, Hellal A. Technological characterization and sensory evaluation of a traditional Algerian fresh cheese clotted with Cynara cardunculus L. flowers and lactic acid bacteria. J Food Sci Technol 2019; 56:3431-8. [PMID: 31274911 DOI: 10.1007/s13197-019-03828-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 04/12/2019] [Accepted: 05/08/2019] [Indexed: 10/26/2022]
Abstract
Jben is an Algerian traditional fresh cheese produced on a small scale in a limited area of east and west Algeria, in Maghnia and Nadrouma. It is manufactured from raw sheep, cow or goat milks, coagulated with dried flowers of wild thistle Cynara cardunculus L. without starter culture addition. In this work, Jben was made using cow and goat pasteurized milks to improve the microbiological quality. Milk was clotted with crude enzymatic extract of dried flowers of wild thistle C. cardunculus L. In order to obtain a better organoleptic characteristic, the assays of cheese making were realized with adding strains of lactic acid bacteria isolated from traditional cheeses. Physico-chemical and microbiological analyzes were carried out on the manufactured cheeses. Milk was clotted with 0.5% v/v by aqueous extract (40 g/L) of dried flowers of C. cardunculus L. Better organoleptic quality and higher cheese yield were obtained with goat milk. Cheese made from pasteurized goat's milk added with Lactococcus lactis subsp. lactis, and that added with the mixture of lactic acid bacteria strains L. lactis subsp. lactis, Lactococcus raffinolactis, Leuconostoc mesenteroïdes ssp. mesenteroïdes, were the most appreciated. It is believed that the activity of L. raffinolactis in dairy products may contribute to their final sensory characteristics.
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Ramezani M, Hosseini SM, Fazeli SAS, Amozegar MA, Fakhari J. PCR-DGGE analysis of fungal community in manufacturing process of a traditional Iranian cheese. Iran J Microbiol 2018; 10:180-6. [PMID: 30112156] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND AND OBJECTIVES The microbial communities of traditional milk-based food are of great importance in its manufacturing process, especially when using raw milk with natural cultures. Liqvan (Lighvan or Levan) is a traditional Iranian buried cheese, which is made from raw ewe's milk without a starter addition. The aim of this study was to explore the fungal active population during this cheese manufacturing process by comparing DNA and RNA based culture independent method Denaturing Gradient Gel Electrophoresis (DGGE). MATERIALS AND METHODS Four samples of each milk, curd and ripened cheese were collected from Liqvan village located in East Azerbaijan province of Iran. Total DNA and RNA of each sample were extracted and PCR amplicons of D1 region of 26S rRNA gene was targeted for DGGE analysis. This method applied at both DNA and RNA levels in order to examine which taxonomic groups of fungi are active at each step of ripening. RESULTS DGGE profiles of yeast amplicons showed different results between extracted DNA and RNA during ripening process. However, the main group that is present in all stages of ripening process belongs to the genus Candida although Kluyveromyces, Pichia, Galactomyces, Saccharomyces and Cryptococcus are most abundant fungi. CONCLUSION As no starter culture added to Liqvan cheese it seems fungal diversity are mainly rely on the indigenous microbiota of milk. Furthermore, the percentage of the dominant fungal genera from the total sequences differed among DNA and cDNA libraries.
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Delorme C, Legravet N, Jamet E, Hoarau C, Alexandre B, El-Sharoud WM, Darwish MS, Renault P. Study of Streptococcus thermophilus population on a world-wide and historical collection by a new MLST scheme. Int J Food Microbiol 2016; 242:70-81. [PMID: 27894009 DOI: 10.1016/j.ijfoodmicro.2016.11.016] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 11/16/2016] [Accepted: 11/17/2016] [Indexed: 01/27/2023]
Abstract
We analyzed 178 Streptococcus thermophilus strains isolated from diverse products, from around the world, over a 60-year period with a new multilocus sequence typing (MLST) scheme. This collection included isolates from two traditional cheese-making sites with different starter-use practices, in sampling campaigns carried out over a three years period. The nucleotide diversity of the S. thermophilus population was limited, but 116 sequence types (ST) were identified. Phylogenetic analysis of the concatenated sequences of the six housekeeping genes revealed the existence of groups confirmed by eBURST analysis. Deeper analyses performed on 25 strains by CRISPR and whole-genome analysis showed that phylogenies obtained by MLST and whole-genome analysis were in agreement but differed from that inferred by CRISPR analysis. Strains isolated from traditional products could cluster in specific groups indicating their origin, but also be mixed in groups containing industrial starter strains. In the traditional cheese-making sites, we found that S. thermophilus persisted on dairy equipment, but that occasionally added starter strains may become dominant. It underlined the impact of starter use that may reshape S. thermophilus populations including in traditional products. This new MLST scheme thus provides a framework for analyses of S. thermophilus populations and the management of its biodiversity.
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Affiliation(s)
- Christine Delorme
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France.
| | - Nicolas Legravet
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Emmanuel Jamet
- Actilait, 419, route des champs laitiers, F-74 800 La Roche sur Foron, France
| | - Caroline Hoarau
- Actilait, 419, route des champs laitiers, F-74 800 La Roche sur Foron, France
| | - Bolotin Alexandre
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
| | - Walid M El-Sharoud
- Food Safety and Microbial Physiology Laboratory, Dairy Department, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
| | - Mohamed S Darwish
- Food Safety and Microbial Physiology Laboratory, Dairy Department, Faculty of Agriculture, Mansoura University, Mansoura, Egypt
| | - Pierre Renault
- Micalis Institute, INRA, AgroParisTech, Université Paris-Saclay, 78350 Jouy-en-Josas, France
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Carpino S, Randazzo CL, Pino A, Russo N, Rapisarda T, Belvedere G, Caggia C. Influence of PDO Ragusano cheese biofilm microbiota on flavour compounds formation. Food Microbiol 2016; 61:126-135. [PMID: 27697162 DOI: 10.1016/j.fm.2016.09.006] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2016] [Revised: 06/14/2016] [Accepted: 09/07/2016] [Indexed: 11/19/2022]
Abstract
The objectives of the present study were to characterize the biofilm microbiota of 11 different farms (from A to K), producing PDO Ragusano cheese, and to investigate on its ability to generate volatile organic compounds (VOCs) in milk samples inoculated with biofilm and incubated under Ragusano cheese making conditions. The biofilms were subjected to plate counting and PCR/T/DGGE analysis and the VOCs generated in incubated milk samples were evaluated through SmartNose, GC/O, and GC/MS. Streptococcus thermophilus was the dominant species both in biofilms and in incubated milks. Lactobacillus, Lactococcus, Enterococcus and Leuconostoc were also identified. Low levels of Pseudomonas spp. and yeasts counts were detected, whereas coliforms, Listeria monocytogenes and Salmonella spp., were never found. SmartNose and GC/O analyses were able to differentiate incubated milk samples on the basis of the odour compounds, highlighting that samples E and F overlapped and sample C was clearly separated from the others. These results complied with those acquired by GC/MS analysis, that detected in total 20 VOCs. Principal component analysis showed positive correlations (r > 0.6; P < 0.05) between some lactic acid bacteria (LAB) and VOCs: such as Enterococcus hirae with alcohols, Lactococcus lactis, Lactobacillus plantarum, Lactobacillus casei and Lactobacillus delbrueckii with aldehydes, and Lactobacillus fermentum, Lactobacillus helveticus and Lactobacillus hilgardii with ketones. This work demonstrates that biofilm represents an excellent source of LAB biodiversity, which contribute to generate VOCs during the production of PDO Ragusano cheese.
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Affiliation(s)
| | - Cinzia L Randazzo
- Department of Agricultural, Food and Environment, University of Catania, via Santa Sofia 98, 95124 Catania, Italy.
| | - Alessandra Pino
- Department of Agricultural, Food and Environment, University of Catania, via Santa Sofia 98, 95124 Catania, Italy
| | | | | | | | - Cinzia Caggia
- Department of Agricultural, Food and Environment, University of Catania, via Santa Sofia 98, 95124 Catania, Italy
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Scatassa ML, Gaglio R, Macaluso G, Francesca N, Randazzo W, Cardamone C, Di Grigoli A, Moschetti G, Settanni L. Transfer, composition and technological characterization of the lactic acid bacterial populations of the wooden vats used to produce traditional stretched cheeses. Food Microbiol 2015; 52:31-41. [PMID: 26338114 DOI: 10.1016/j.fm.2015.06.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 06/10/2015] [Accepted: 06/20/2015] [Indexed: 10/23/2022]
Abstract
The biofilms of 12 wooden vats used for the production of the traditional stretched cheeses Caciocavallo Palermitano and PDO Vastedda della valle del Belìce were investigated. Salmonella spp. and Listeria monocytogenes were never detected. Total coliforms were at low numbers with Escherichia coli found only in three vats. Coagulase-positive staphylococci (CPS) were below the enumeration limit, whereas lactic acid bacteria (LAB) dominated the surfaces of all vats. In general, the dominance was showed by coccus LAB. Enterococci were estimated at high numbers, but usually between 1 and 2 Log cycles lower than other LAB. LAB populations were investigated at species and strain level and for their technological properties relevant in cheese production. Eighty-five strains were analysed by a polyphasic genetic approach and allotted into 16 species within the genera Enterococcus, Lactobacillus, Lactococcus, Leuconostoc, Pediococcus and Streptococcus. Enterococcus faecium was found in all wooden vats and the species most frequently isolated were Enterococcus faecalis, Lactococcus lactis, Leuconostoc mesenteroides, Pediococcus acidilactici and Streptococcus thermophilus. The study of the quantitative data on acidification rate, autolysis kinetics, diacetyl production, antibacterial compound generation and proteolysis by cluster and principal component analysis led to the identification of some strains with promising dairy characteristics. Interestingly, a consistent percentage of LAB was bacteriocin-like inhibitory substances (BLIS) producer. Thus, the microbial biofilms of the wooden vats analysed in this study might contribute actively to the stability of the final cheeses.
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Affiliation(s)
- Maria Luisa Scatassa
- Istituto Zooprofilattico Sperimentale della Sicilia "Adelmo Mirri", Via G. Marinuzzi 3, 90129, Palermo, Italy
| | - Raimondo Gaglio
- Dipartimento Scienze Agrarie e Forestali, Università di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy
| | - Giusi Macaluso
- Istituto Zooprofilattico Sperimentale della Sicilia "Adelmo Mirri", Via G. Marinuzzi 3, 90129, Palermo, Italy
| | - Nicola Francesca
- Dipartimento Scienze Agrarie e Forestali, Università di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy
| | - Walter Randazzo
- Dipartimento Scienze Agrarie e Forestali, Università di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy
| | - Cinzia Cardamone
- Istituto Zooprofilattico Sperimentale della Sicilia "Adelmo Mirri", Via G. Marinuzzi 3, 90129, Palermo, Italy
| | - Antonino Di Grigoli
- Dipartimento Scienze Agrarie e Forestali, Università di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy
| | - Giancarlo Moschetti
- Dipartimento Scienze Agrarie e Forestali, Università di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy
| | - Luca Settanni
- Dipartimento Scienze Agrarie e Forestali, Università di Palermo, Viale delle Scienze 4, 90128, Palermo, Italy.
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Astegiano S, Bellio A, Adriano D, Bianchi DM, Gallina S, Gorlier A, Gramaglia M, Lombardi G, Macori G, Zuccon F, Decastelli L. Evaluation of Hygiene and Safety Criteria in the Production of a Traditional Piedmont Cheese. Ital J Food Saf 2014; 3:1705. [PMID: 27800354 PMCID: PMC5076721 DOI: 10.4081/ijfs.2014.1705] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 05/23/2014] [Accepted: 05/23/2014] [Indexed: 12/01/2022] Open
Abstract
Traditional products and related processes must be safe to protect consumers’ health. The aim of this study was to evaluate microbiological criteria of a traditional Piedmont cheese, made by two different cheese producers (A and B). Three batches of each cheese were considered. The following seven samples of each batch were collected: raw milk, milk at 38°C, curd, cheese at 7, 30, 60, 90 days of ripening. During cheese making process, training activities dealing with food safety were conducted. Analyses regarding food safety and process hygiene criteria were set up according to the EC Regulation 2073/2005. Other microbiological and chemical-physical analyses [lactic streptococci, lactobacilli, pH and water activity (Aw)] were performed as well. Shiga-toxin Escherichia coli, aflatoxin M1 and antimicrobial substances were considered only for raw milk. All samples resulted negative for food safety criteria; Enterobacteriaceae, E.coli and coagulase-positive staphylococci (CPS) were high in the first phase of cheese production, however they decreased at the end of ripening. A high level of CPS in milk was found in producer A, likewise in some cheese samples a count of >5 Log CFU/g was reached; staphylococcal enterotoxins resulted negative. The pH and Aw values decreased during the cheese ripening period. The competition between lactic flora and potential pathogen microorganisms and decreasing of pH and Aw are considered positive factors in order to ensure safety of dairy products. Moreover, training activities play a crucial role to manage critical points and perform corrective action. Responsible application of good manufacturing practices are considered key factors to obtain a high hygienic level in dairy products.
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Affiliation(s)
- Sara Astegiano
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Alberto Bellio
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Daniela Adriano
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Daniela Manila Bianchi
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Silvia Gallina
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Alessandra Gorlier
- Dipartimento di Agronomia, Selvicoltura e Gestione del Territorio, Università degli Studi di Torino , Italy
| | - Monica Gramaglia
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Giampiero Lombardi
- Dipartimento di Agronomia, Selvicoltura e Gestione del Territorio, Università degli Studi di Torino , Italy
| | - Guerrino Macori
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Fabio Zuccon
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
| | - Lucia Decastelli
- Struttura Complessa del Controllo Alimenti e Igiene delle Produzioni, Istituto Zooprofilattico Sperimentale del Piemonte , Liguria e Valle d'Aosta, Torino
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Mojarad Khanghah S, Ganbarov K. Lactobacillus with probiotic potential from homemade cheese in Azerbijan. Bioimpacts 2014; 4:49-52. [PMID: 24790899 PMCID: PMC4005284 DOI: 10.5681/bi.2014.014] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/04/2014] [Revised: 04/07/2014] [Accepted: 04/07/2014] [Indexed: 01/23/2023]
Abstract
INTRODUCTION Lactobacillus is believed to be beneficial in human health, thus the search for isolation and identification of friendly human bacteria from traditional fermented foods is important in medicine. One of the dairy products, traditional cheese as a highly-consumed dairy product could be a valuable source of these friendly edible germs. METHODS In this research, home-made cheese from Lankaran, Jalil Abad and Salian regions in Azerbaijan was characterized for the presence of Lactobacilli with probiotic potential. The bacterial suspension was enriched and screened for acid and bile resistances. Then, the isolates were subjected to antibiotic resistance and antibacterial effects against convenient pathogenic bacteria. The isolates were identified by 16s rDNA sequencing. RESULTS The results clearly revealed two probiotics with higher homology to Lactobacillus planetarum and Lactobacillus fermentum. CONCLUSION No antibiotic resistance was detected in any of the potentially probiotic lactobacilli isolates in these regions, where people continue to follow a life-style that is largely traditional, with traditional medications.
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Affiliation(s)
| | - Khudaverdi Ganbarov
- Department of Microbiology, Faculty of biology, State University of Baku, Azarbayjan
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Gaglio R, Scatassa ML, Cruciata M, Miraglia V, Corona O, Di Gerlando R, Portolano B, Moschetti G, Settanni L. In vivo application and dynamics of lactic acid bacteria for the four-season production of Vastedda-like cheese. Int J Food Microbiol 2014; 177:37-48. [PMID: 24598514 DOI: 10.1016/j.ijfoodmicro.2014.02.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2013] [Revised: 01/11/2014] [Accepted: 02/14/2014] [Indexed: 11/18/2022]
Abstract
Twelve lactic acid bacteria (LAB), previously selected in vitro (Gaglio et al., 2014), were evaluated in situ for their potential to act as starter cultures for the continuous four-season production of Vastedda-like cheese, made with raw ewes' milk. The strains belonged to Lactobacillus delbrueckii, Lactococcus lactis subsp. cremoris, Leuconostoc mesenteroides subsp. mesenteroides and Streptococcus thermophilus. LAB were first inoculated in multiple-strain combinations on the basis of their optimal growth temperatures in three process conditions which differed for milk treatment and medium for strain development: process 1, growth of strains in the optimal synthetic media and pasteurised milk; process 2, growth of strains in whey based medium (WBM) and pasteurised milk; and process 3, growth of strains in WBM and raw milk. The strains that acidified the curds in short time, as shown by a pH drop, were all mesophilic and were then tested in a single inoculum through process 3. Randomly amplified polymorphic DNA (RAPD)-PCR analysis applied to the colonies isolated from the highest dilutions of samples confirmed the dominance of the added strains after curd acidification, stretching and storage. After 15days of refrigerated storage, the decrease in pH values showed an activity of the mesophilic strains at low temperatures, but only Lc. lactis subsp. cremoris PON153, Ln. mesenteroides subsp. mesenteroides PON259 and PON559 increased their number during the 15days at 7°C. A sensory evaluation indicated that the cheeses obtained by applying protocol 3 and by inoculation with lactococci are the most similar to the protected denomination of origin (PDO) cheese and received the best scores by the judges. Thus, the experimental cheeses obtained with raw milk and inoculated with single and multiple combinations of lactococci were subjected to the analysis of the volatile organic compounds (VOCs) carried out by a headspace solid phase microextraction (SPME) technique coupled with gas chromatography with mass spectrometric detection (GC/MS). The dominance of lactococci over thermophilic LAB of raw milk was verified during summer production and, based on the combination of VOC profiles and sensory evaluation of the final cheeses, the multi-strain Lactococcus culture resulted in the most suitable starter preparation for the full-year production of Vastedda-like cheese.
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Affiliation(s)
- Raimondo Gaglio
- Department of Agricultural and Forest Science, Università di Palermo, Viale delle Scienze 4, 90128 Palermo, Italy
| | - Maria Luisa Scatassa
- Istituto Zooprofilattico Sperimentale della Sicilia "Adelmo Mirri", Via G. Marinuzzi 3, 90129 Palermo, Italy
| | - Margherita Cruciata
- Department of Agricultural and Forest Science, Università di Palermo, Viale delle Scienze 4, 90128 Palermo, Italy
| | - Viviana Miraglia
- Istituto Zooprofilattico Sperimentale della Sicilia "Adelmo Mirri", Via G. Marinuzzi 3, 90129 Palermo, Italy
| | - Onofrio Corona
- Department of Agricultural and Forest Science, Università di Palermo, Viale delle Scienze 4, 90128 Palermo, Italy
| | - Rosalia Di Gerlando
- Department of Agricultural and Forest Science, Università di Palermo, Viale delle Scienze 4, 90128 Palermo, Italy
| | - Baldassare Portolano
- Department of Agricultural and Forest Science, Università di Palermo, Viale delle Scienze 4, 90128 Palermo, Italy
| | - Giancarlo Moschetti
- Department of Agricultural and Forest Science, Università di Palermo, Viale delle Scienze 4, 90128 Palermo, Italy
| | - Luca Settanni
- Department of Agricultural and Forest Science, Università di Palermo, Viale delle Scienze 4, 90128 Palermo, Italy.
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