1
|
Santamarina-García G, Amores G, Llamazares D, Hernández I, Javier R Barron L, Virto M. Phenotypic and genotypic characterization of antimicrobial resistances reveals the effect of the production chain in reducing resistant lactic acid bacteria in an artisanal raw ewe milk PDO cheese. Food Res Int 2024; 187:114308. [PMID: 38763625 DOI: 10.1016/j.foodres.2024.114308] [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: 01/17/2024] [Revised: 03/27/2024] [Accepted: 04/16/2024] [Indexed: 05/21/2024]
Abstract
Antimicrobial resistance (AMR) is a significant public health threat, with the food production chain, and, specifically, fermented products, as a potential vehicle for dissemination. However, information about dairy products, especially raw ewe milk cheeses, is limited. The present study analysed, for the first time, the occurrence of AMRs related to lactic acid bacteria (LAB) along a raw ewe milk cheese production chain for the most common antimicrobial agents used on farms (dihydrostreptomycin, benzylpenicillin, amoxicillin and polymyxin B). More than 200 LAB isolates were obtained and identified by Sanger sequencing (V1-V3 16S rRNA regions); these isolates included 8 LAB genera and 21 species. Significant differences in LAB composition were observed throughout the production chain (P ≤ 0.001), with Enterococcus (e.g., E. hirae and E. faecalis) and Bacillus (e.g., B. thuringiensis and B. cereus) predominating in ovine faeces and raw ewe milk, respectively, along with Lactococcus (L. lactis) in whey and fresh cheeses, while Lactobacillus and Lacticaseibacillus species (e.g., Lactobacillus sp. and L. paracasei) prevailed in ripened cheeses. Phenotypically, by broth microdilution, Lactococcus, Enterococcus and Bacillus species presented the greatest resistance rates (on average, 78.2 %, 56.8 % and 53.4 %, respectively), specifically against polymyxin B, and were more susceptible to dihydrostreptomycin. Conversely, Lacticaseibacillus and Lactobacillus were more susceptible to all antimicrobials tested (31.4 % and 39.1 %, respectively). Thus, resistance patterns and multidrug resistance were reduced along the production chain (P ≤ 0.05). Genotypically, through HT-qPCR, 31 antimicrobial resistance genes (ARGs) and 6 mobile genetic elements (MGEs) were detected, predominating Str, StrB and aadA-01, related to aminoglycoside resistance, and the transposons tnpA-02 and tnpA-01. In general, a significant reduction in ARGs and MGEs abundances was also observed throughout the production chain (P ≤ 0.001). The current findings indicate that LAB dynamics throughout the raw ewe milk cheese production chain facilitated a reduction in AMRs, which has not been reported to date.
Collapse
Affiliation(s)
- Gorka Santamarina-García
- Lactiker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Bioaraba Health Research Institute-Prevention, Promotion and Health Care, 01009 Vitoria-Gasteiz, Spain; Joint Research Laboratory on Environmental Antibiotic Resistance, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain.
| | - Gustavo Amores
- Lactiker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Bioaraba Health Research Institute-Prevention, Promotion and Health Care, 01009 Vitoria-Gasteiz, Spain; Joint Research Laboratory on Environmental Antibiotic Resistance, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Diego Llamazares
- Lactiker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Igor Hernández
- Lactiker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Bioaraba Health Research Institute-Prevention, Promotion and Health Care, 01009 Vitoria-Gasteiz, Spain; Joint Research Laboratory on Environmental Antibiotic Resistance, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Luis Javier R Barron
- Lactiker Research Group, Department of Pharmacy and Food Sciences, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Joint Research Laboratory on Environmental Antibiotic Resistance, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| | - Mailo Virto
- Lactiker Research Group, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; Bioaraba Health Research Institute-Prevention, Promotion and Health Care, 01009 Vitoria-Gasteiz, Spain; Joint Research Laboratory on Environmental Antibiotic Resistance, Department of Biochemistry and Molecular Biology, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain
| |
Collapse
|
2
|
Morshdy AEMA, Abdallah KME, Abdallah HE, Algahtani FD, Elabbasy MT, Atique S, Ahmad K, Al-Najjar MAA, Abdallah HM, Mahmoud AFA. Potential of Natural Phenolic Compounds as Antimicrobial Agents against Multidrug-Resistant Staphylococcus aureus in Chicken Meat. Molecules 2023; 28:6742. [PMID: 37764518 PMCID: PMC10535414 DOI: 10.3390/molecules28186742] [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: 08/09/2023] [Revised: 09/08/2023] [Accepted: 09/14/2023] [Indexed: 09/29/2023] Open
Abstract
Staphylococcus aureus is one of the most widespread foodborne bacteria that cause high morbidity, mortality, and economic loss, primarily if foodborne diseases are caused by pathogenic and multidrug-resistant (MDR) strains. This study aimed to determine the prevalence of S. aureus in chicken meat in Egyptian markets. Thus, this study might be the first to assess the efficiency of different natural phenolic compounds as novel antibacterial agents against MDR S. aureus pathogens isolated from raw chicken meat in the Egyptian market. The incidence and quantification of pathogenic S. aureus were detected in retail raw chicken meat parts (breast, thigh, fillet, and giblets). In total, 73 out of 80 (91.3%) of the chicken meat parts were contaminated, with S. aureus as the only species isolated. Of the 192 identified S. aureus isolates, 143 were coagulase-positive S. aureus and 117 isolates were MDR (81.8%, 117/143). Twenty-two antibiotic resistance profile patterns were detected. One strain was randomly selected from each pattern to further analyze virulence and resistance genes. Extracted DNA was assessed for the presence of antibiotic-resistance genes, i.e., vancomycin-resistance (vanA), aminoglycosides-resistance (aacA-aphD), apramycin-resistance (apmA), and methicillin-resistance (mecA), penicillin-resistance (blaZ), and virulence genes staphylococcal enterotoxins (sea and seb), Panton-Valentine leucocidin (pvl), clumping factor A (clfA), and toxic shock syndrome toxin (tst). Clustering analyses revealed that six S. aureus strains harbored the most virulence and resistance genes. The activity of hydroquinone was significantly higher than thymol, carvacrol, eugenol, and protocatechuic acid. Therefore, phenolic compounds, particularly hydroquinone, could potentially alternate with conventional antibiotics against the pathogenic MDR S. aureus inhabiting raw chicken meat. Hence, this study indicates that urgent interventions are necessary to improve hygiene for safer meat in Egyptian markets. Moreover, hydroquinone could be a natural phenolic compound for inhibiting foodborne pathogens.
Collapse
Affiliation(s)
- Alaa Eldin M. A. Morshdy
- Food Hygiene, Safety, and Technology Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt; (A.E.M.A.M.); (H.E.A.)
| | - Karima M. E. Abdallah
- Food Hygiene, Safety, and Technology Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt; (A.E.M.A.M.); (H.E.A.)
| | - Heba E. Abdallah
- Food Hygiene, Safety, and Technology Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt; (A.E.M.A.M.); (H.E.A.)
| | - Fahad D. Algahtani
- Department of Public Health, College of Public Health and Health Informatics, University of Hail, Ha’il 81451, Saudi Arabia
| | | | - Suleman Atique
- Department of Public Health Science, Faculty of Landscape and Society, Norwegian University of Life Sciences, 1430 Ås, Norway
| | - Khursheed Ahmad
- Department of Biotechnology, Yeungnam University, Gyeongsan 38541, Republic of Korea
| | | | - Hossam M. Abdallah
- Department of Microbiology, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt;
| | - Abdallah Fikry A. Mahmoud
- Food Hygiene, Safety, and Technology Department, Faculty of Veterinary Medicine, Zagazig University, Zagazig 44519, Egypt; (A.E.M.A.M.); (H.E.A.)
| |
Collapse
|
3
|
Hleba L, Hlebova M, Kovacikova E, Kovacik A. MALDI-TOF MS Indirect Beta-Lactamase Detection in Ampicillin-Resistant Haemophilus influenzae. Microorganisms 2023; 11:microorganisms11041018. [PMID: 37110441 PMCID: PMC10142446 DOI: 10.3390/microorganisms11041018] [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: 02/28/2023] [Revised: 04/11/2023] [Accepted: 04/12/2023] [Indexed: 04/29/2023] Open
Abstract
Rapid identification of beta-lactamase-producing strains of Haemophilus influenzae plays key role in diagnostics in clinical microbiology. Therefore, the aim of this study was the rapid determination of beta-lactamase's presence in H. influenzae isolates via indirect detection of degradation ampicillin products using MALDI-TOF MS. H. influenzae isolates were subjected to antibiotic resistance testing using disk diffusion and MIC methodologies. Beta-lactamase activity was tested using MALDI-TOF MS, and results were compared to spectral analysis of alkaline hydrolysis. Resistant and susceptible strains of H. influenzae were distinguished, and strains with a high MIC level were identified as beta-lactamase-producing. Results indicate that MALDI-TOF mass spectrometry is also suitable for the rapid identification of beta-lactamase-producing H. influenzae. This observation and confirmation can accelerate identification of beta-lactamase strains of H. influenzae in clinical microbiology, which can have an impact on health in general.
Collapse
Affiliation(s)
- Lukas Hleba
- Institute of Biotechnology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. Andreja Hlinku 2, 949 76 Nitra, Slovakia
| | - Miroslava Hlebova
- Department of Biology, Faculty of Natural Sciences, University of Ss. Cyril and Methodius, Nám. J. Herdu 2, 917 01 Trnava, Slovakia
| | - Eva Kovacikova
- AgroBioTech Research Centre, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| | - Anton Kovacik
- Institute of Applied Biology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Tr. A. Hlinku 2, 949 76 Nitra, Slovakia
| |
Collapse
|
4
|
Nalepa B, Markiewicz LH. Microbiological Biodiversity of Regional Cow, Goat and Ewe Milk Cheeses Produced in Poland and Antibiotic Resistance of Lactic Acid Bacteria Isolated from Them. Animals (Basel) 2022; 13:168. [PMID: 36611776 PMCID: PMC9817895 DOI: 10.3390/ani13010168] [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: 11/08/2022] [Revised: 12/27/2022] [Accepted: 12/29/2022] [Indexed: 01/04/2023] Open
Abstract
(1) Unique sensory values of traditional and regional dairy products made them more and more popular among consumers. Lactic acid bacteria naturally occurring in these products can express antibiotic resistance and be a reservoir of antibiotic resistance genes (ARG) in the environment. The aim of the study was to characterize the microbial diversity of twenty regional cheeses produced from non-pasteurized cow, goat and ewe milk, and investigate the phenotypic and genotypic antibiotic resistance (AR) of lactic acid bacteria isolated from these products. (2) Conventional microbiological methods were applied for the enumeration of lactic acid bacteria (lactobacilli and lactococci) and their isolation, and for the enumeration of Enterococcus, Staphylococcus, Enterobacteriaceae and spores. The disc diffusion method was applied for phenotypic AR. The PCR-based methods were used for strain identification, microbiological diversity of cheeses (PCR-DGGE), and for AR gene detection. (3) Among 79 LAB isolates the most frequent species were L. plantarum (n = 18), Leuc. lactis (n = 17), Lc. lactis (n = 11), Leuc. mesenteroides (n = 9) and L. pentosus (n = 8). Additionally, by using the PCR-DGGE method, DNA of L. casei was found in nine products. Lactobacilli (5.63-8.46 log cfu/g) and lactococci (6.15-8.41 log cfu/g) predominated over Enterococcus (max. 4.89 log cfu/g), Staphylococcus (max. 4.18 log cfu/g), and Enterobacteriaceae (mostly up to 4.88 log cfu/g). Analysis of phenotypic resistance to tetracycline (30 µg), erythromycin (15 µg), and chloramphenicol (30 µg) showed that 29% of LAB isolates were resistant to one antibiotic, 8%-to two, and 12%-to all tested antibiotics. Antibiotic resistance genes (AGR) for tetracycline (tet(M), tet(L), tet(W)), erythromycin (erm(B)) and chloramphenicol (cat-TC) were detected in 30 (38%), 29 (36.7%) and 33 (43.4%) LAB isolates, respectively. Among 31 LAB isolates phenotypically susceptible to all tested antibiotics, only 5 (16%) had no ARGs. (4) The results obtained in our work shed light on the potential threat posed by the widespread presence of ARGs in LAB present in regional cheeses.
Collapse
Affiliation(s)
- Beata Nalepa
- Department of Food and Industrial Microbiology, Faculty of Food Technology, University of Warmia and Mazury, Pl. Cieszynski 1, 10-726 Olsztyn, Poland
| | - Lidia Hanna Markiewicz
- Department of Immunology and Food Microbiology, Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-748 Olsztyn, Poland
| |
Collapse
|
5
|
Kmeť V, Čuvalová A, Stanko M. Small mammals as sentinels of antimicrobial-resistant staphylococci. Folia Microbiol (Praha) 2018. [PMID: 29524153 DOI: 10.1007/s12223-018-0594-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
A total of 39 coagulase-negative staphylococci and seven Staphylococcus aureus strains were isolated from small mammal feces, i.e., the striped field mouse (Apodemus agrarius) and the yellow-necked mouse (A. flavicollis) in two sampling areas, deciduous forest and karst plains. MALDI-TOF analysis revealed five species of coagulase-negative staphylococci: S. sciuri, S. hominis, S. warneri, S. haemolyticus, and S. xylosus. All strains were susceptible to tetracycline, linezolid, vancomycin, and teicoplanin. Three MRSA strains with the mecA gene were detected. The beta-lactamase gene blaZ was detected in ampicillin-resistant staphylococci and in the high-level resistant strains (oxacillin over 2 mg/L) mecA gene. The mecC gene was not detected by PCR. Erythromycin-resistant staphylococci harbored the ermC gene and/or the efflux gene msrA. There were no detectable dfr genes in trimethoprim-resistant staphylococci and the rifampicin-resistant strains were without mutation in the rpoB gene. In summary, wild small mammals may serve as sentinels of mecA-positive S. aureus with erythromycin resistance genes ermC and efflux msrA. Small mammals appear to be useful indicators of antibiotic resistance.
Collapse
Affiliation(s)
- Vladimír Kmeť
- Institute of Animal Physiology, Centre of Biosciences, Slovak Academy of Sciences, Soltesovej 4, 040 01, Kosice, Slovakia.
| | - Anna Čuvalová
- Institute of Animal Physiology, Centre of Biosciences, Slovak Academy of Sciences, Soltesovej 4, 040 01, Kosice, Slovakia
| | - Michal Stanko
- Institute of Parasitology and Institute of Zoology, Slovak Academy of Sciences, Hlinkova 3, 040 01, Kosice, Slovakia
| |
Collapse
|
6
|
Safety, probiotic and technological properties of Lactobacilli isolated from unpasteurised ovine and caprine cheeses. ANN MICROBIOL 2017. [DOI: 10.1007/s13213-017-1310-2] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
|
7
|
Kollar P, Šmejkal K, Salmonová H, Vlková E, Lepšová-Skácelová O, Balounová Z, Rajchard J, Cvačka J, Jaša L, Babica P, Pazourek J. Assessment of Chemical Impact of Invasive Bryozoan Pectinatella magnifica on the Environment: Cytotoxicity and Antimicrobial Activity of P. magnifica Extracts. Molecules 2016; 21:E1476. [PMID: 27827926 PMCID: PMC6272939 DOI: 10.3390/molecules21111476] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2016] [Revised: 10/23/2016] [Accepted: 10/31/2016] [Indexed: 11/16/2022] Open
Abstract
Pectinatella magnifica, an invasive bryozoan, might significantly affect ecosystem balance due to its massive occurrence in many areas in Europe and other parts of the world. Biological and chemical analyses are needed to get complete information about the impact of the animal on the environment. In this paper, we aimed to evaluate in vitro cytotoxic effects of five extracts prepared from P. magnifica using LDH assay on THP-1 cell line. Antimicrobial activities of extracts against 22 different bacterial strains were tested by microdilution method. Our study showed that all extracts tested, except aqueous portion, demonstrated LD50 values below 100 μg/mL, which indicates potential toxicity. The water extract of P. magnifica with LD50 value of 250 μg/mL also shows potentially harmful effects. Also, an environmental risk resulting from the presence and increasing biomass of potentially toxic benthic cyanobacteria in old colonies should not be underestimated. Toxicity of Pectinatella extracts could be partially caused by presence of Aeromonas species in material, since we found members of these genera as most abundant bacteria associated with P. magnifica. Furthermore, P. magnifica seems to be a promising source of certain antimicrobial agents. Its methanolic extract, hexane, and chloroform fractions possessed selective inhibitory effect on some potential pathogens and food spoiling bacteria in the range of MIC 0.5-10 mg/mL. Future effort should be made to isolate and characterize the content compounds derived from P. magnifica, which could help to identify the substance(s) responsible for the toxic effects of P. magnifica extracts.
Collapse
Affiliation(s)
- Peter Kollar
- Department of Human Pharmacology and Toxicology, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Palackého tř. 1946/1, Brno 61242, Czech Republic.
| | - Karel Šmejkal
- Department of Natural Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Palackého tř. 1946/1, Brno 61242, Czech Republic.
| | - Hana Salmonová
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, Prague 6, 16521, Czech Republic.
| | - Eva Vlková
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamýcká 129, Prague 6, 16521, Czech Republic.
| | - Olga Lepšová-Skácelová
- Department of Botany, Faculty of Science, University of South Bohemia in České Budějovice, Branišovská 31, České Budějovice 37005, Czech Republic.
| | - Zuzana Balounová
- Department of Biological Studies, Faculty of Agriculture, University of South Bohemia in České Budějovice, Studentská 13, České Budějovice 37005, Czech Republic.
| | - Josef Rajchard
- Department of Biological Studies, Faculty of Agriculture, University of South Bohemia in České Budějovice, Studentská 13, České Budějovice 37005, Czech Republic.
| | - Josef Cvačka
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences of the Czech Republic, v.v.i., Flemingovo nám. 2, Prague 16610, Czech Republic.
| | - Libor Jaša
- RECETOX-Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, Brno 60200, Czech Republic.
- Department of Experimental Phycology and Ecotoxicology, Institute of Botany, Academy of Sciences of the Czech Republic, Lidická 25/27, Brno 60200, Czech Republic.
| | - Pavel Babica
- RECETOX-Research Centre for Toxic Compounds in the Environment, Faculty of Science, Masaryk University, Kamenice 753/5, Brno 60200, Czech Republic.
- Department of Experimental Phycology and Ecotoxicology, Institute of Botany, Academy of Sciences of the Czech Republic, Lidická 25/27, Brno 60200, Czech Republic.
| | - Jiří Pazourek
- Department of Chemical Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Palackého tř. 1946/1, Brno 61242, Czech Republic.
| |
Collapse
|
8
|
Volstatova T, Havlik J, Potuckova M, Geigerova M. Milk digesta and milk protein fractions influence the adherence of Lactobacillus gasseri R and Lactobacillus casei FMP to human cultured cells. Food Funct 2016; 7:3531-8. [DOI: 10.1039/c6fo00545d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Adhesion to the intestinal epithelium is considered an important feature of probiotic bacteria, which may increase their persistence in the intestine, allowing them to exert their beneficial health effect or promote the colonisation process.
Collapse
Affiliation(s)
- Tereza Volstatova
- Department of Microbiology
- Nutrition and Dietetics
- Czech University of Life Sciences Prague
- 165 21 Prague
- Czech Republic
| | - Jaroslav Havlik
- Department of Microbiology
- Nutrition and Dietetics
- Czech University of Life Sciences Prague
- 165 21 Prague
- Czech Republic
| | - Miroslava Potuckova
- Department of Quality of Agricultural Products
- Czech University of Life Sciences Prague
- 165 21 Prague
- Czech Republic
| | - Martina Geigerova
- Department of Microbiology
- Nutrition and Dietetics
- Czech University of Life Sciences Prague
- 165 21 Prague
- Czech Republic
| |
Collapse
|
9
|
Ge J, Wang Y, Gao D, Ping W. Effect of small interfering RNA against Paracin 1.7 bacteriocin produced by Lactobacillus paracasei HD1-7. J Basic Microbiol 2015; 55:1075-81. [PMID: 26011063 DOI: 10.1002/jobm.201400938] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2014] [Accepted: 04/27/2015] [Indexed: 11/11/2022]
Abstract
Lactobacillus paracasei HD1-7 (CCTCCM 205015), isolated from Chinese sauerkraut fermentation broth, contains the bacteriocin Paracin 1.7 which possesses broad-spectrum antibacterial activity. The gene-silencing effect of small interfering RNA (siRNA) is a potential strategy for further understanding the mechanism of production of Paracin 1.7 by L. paracasei HD1-7. In this study, the effect of siRNA on the expression of the most important proteins in the production of Paracin 1.7, sensor kinase (prcK) and response regulator (prcR), was investigated. SiRNA were designed against prcK and prcR, and qRT-PCR was performed to examine the expression of prcK and prcR mRNA. The efficacy of siRNA was determined by comparing the level of antimicrobial activity of the strains. qRT-PCR showed that siRNA-K4 and siRNA-K5 significantly inhibited the expression of prcK mRNA, and siRNA-R4 and siRNA-R6 significantly inhibited the expression of prcR mRNA. The proteins levels and antibacterial activities of mutant strains were lower than the original and control groups, respectively. The results demonstrate that siRNA inhibited both mRNA expression and the production of Paracin 1.7 in L. paracasei HD1-7. Targeting of prcK and prcR with siRNA appears to be a novel strategy for researching the mechanism of Paracin 1.7 production by L. paracasei HD1-7.
Collapse
Affiliation(s)
- Jingping Ge
- Key Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, P.R. China
| | - Yang Wang
- Key Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, P.R. China
| | - Dongni Gao
- Key Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, P.R. China
| | - Wenxiang Ping
- Key Laboratory of Microbiology, College of Life Science, Heilongjiang University, Harbin, P.R. China
| |
Collapse
|
10
|
Vlková E, Killer J, Kmeť V, Rada V, Musilová Š, Bunešová V, Hovorková P, Božik M, Salmonová H, Rajchard J. Identification of microbiota associated with Pectinatella magnifica in South Bohemia. Biologia (Bratisl) 2015. [DOI: 10.1515/biolog-2015-0040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
11
|
Pechar R, Rada V, Parafati L, Musilova S, Bunesova V, Vlkova E, Killer J, Mrazek J, Kmet V, Svejstil R. Mupirocin-mucin agar for selective enumeration of Bifidobacterium bifidum. Int J Food Microbiol 2014; 191:32-5. [PMID: 25217723 DOI: 10.1016/j.ijfoodmicro.2014.08.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/29/2014] [Accepted: 08/23/2014] [Indexed: 10/24/2022]
Abstract
Bifidobacterium bifidum is a bacterial species exclusively found in the human intestinal tract. This species is becoming increasingly popular as a probiotic organism added to lyophilized products. In this study, porcine mucin was used as the sole carbon source for the selective enumeration of B. bifidum in probiotic food additives. Thirty-six bifidobacterial strains were cultivated in broth with mucin. Only 13 strains of B. bifidum utilized the mucin to produce acids. B. bifidum was selectively enumerated in eight probiotic food supplements using agar (MM agar) containing mupirocin (100 mg/L) and mucin (20 g/L) as the sole carbon source. MM agar was fully selective if the B. bifidum species was presented together with Bifidobacterium animalis subsp. lactis, Bifidobacterium breve, and Bifidobacterium longum subsp. longum species and with lactic acid bacteria (lactobacilli, streptococci). Isolated strains of B. bifidum were identified using biochemical, PCR, MALDI-TOF procedures and 16S rRNA gene sequencing. The novel selective medium was also suitable for the isolation of B. bifidum strains from human fecal samples.
Collapse
Affiliation(s)
- Radko Pechar
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, Prague 6 165 21, Czech Republic
| | - Vojtech Rada
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, Prague 6 165 21, Czech Republic.
| | - Lucia Parafati
- Department of Agri-food and Environmental Systems Management, University of Catania, Via S. Sofia 100, 95123 Catania, Italy
| | - Sarka Musilova
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, Prague 6 165 21, Czech Republic
| | - Vera Bunesova
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, Prague 6 165 21, Czech Republic
| | - Eva Vlkova
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, Prague 6 165 21, Czech Republic
| | - Jiri Killer
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, Prague 6 165 21, Czech Republic; Institute of Animal Physiology and Genetics v.v.i., Academy of Sciences of the Czech Republic, Vídenská 1083, Prague 4 142 20, Czech Republic
| | - Jakub Mrazek
- Institute of Animal Physiology and Genetics v.v.i., Academy of Sciences of the Czech Republic, Vídenská 1083, Prague 4 142 20, Czech Republic
| | - Vladimir Kmet
- Institute of Animal Physiology, Slovak Academy of Sciences, Soltesovej 4-6, 040 01 Kosice, Slovakia
| | - Roman Svejstil
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences, Kamycka 129, Prague 6 165 21, Czech Republic
| |
Collapse
|
12
|
Bunesova V, Killer J, Vlkova E, Musilova S, Tomaska M, Rada V, Kmet V. Isolation and characterization of bifidobacteria from ovine cheese. Int J Food Microbiol 2014; 188:26-30. [PMID: 25086349 DOI: 10.1016/j.ijfoodmicro.2014.07.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2014] [Revised: 06/21/2014] [Accepted: 07/01/2014] [Indexed: 11/18/2022]
Abstract
Animal products are one of the niches of bifidobacteria, a fact probably attributable to secondary contamination. In this study, 2 species of the genus Bifidobacterium were isolated by culture-dependent methods from ovine cheeses that were made from unpasteurized milk without addition of starter cultures. The isolates were identified as Bifidobacterium crudilactis and Bifidobacterium animalis subsp. lactis using matrix-assisted laser desorption/ionization time-of-flight analysis and sequencing of phylogenetic markers (16S rRNA, hsp60, and fusA).
Collapse
Affiliation(s)
- Vera Bunesova
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, Prague 6-Suchdol 165 21, Czech Republic.
| | - Jiri Killer
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, Prague 6-Suchdol 165 21, Czech Republic; Institute of Animal Physiology and Genetics, Academy of Sciences of the Czech Republic, Vídeňská 1083, Prague 4-Krč 14 200, Czech Republic
| | - Eva Vlkova
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, Prague 6-Suchdol 165 21, Czech Republic
| | - Sarka Musilova
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, Prague 6-Suchdol 165 21, Czech Republic
| | - Martin Tomaska
- Dairy Research Institute, Dlhá 95, 010 01 Žilina, Slovakia
| | - Vojtech Rada
- Department of Microbiology, Nutrition and Dietetics, Faculty of Agrobiology, Food and Natural Resources, Czech University of Life Sciences Prague, Kamycka 129, Prague 6-Suchdol 165 21, Czech Republic
| | - Vladimir Kmet
- Institute of Animal Physiology of Slovak Academy of Sciences, Soltesovej 4, 040 01 Kosice, Slovakia
| |
Collapse
|
13
|
D'Auria G, Džunková M, Moya A, Tomáška M, Kološta M, Kmet V. Genome Sequence of Lactobacillus plantarum 19L3, a Strain Proposed as a Starter Culture for Slovenska Bryndza Ovine Cheese. GENOME ANNOUNCEMENTS 2014; 2:2/2/e00292-14. [PMID: 24762933 PMCID: PMC3999490 DOI: 10.1128/genomea.00292-14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The genome sequence of Lactobacillus plantarum isolated from ovine cheese is presented here. This bacterium is proposed as a starter strain, named 19L3, for Slovenská bryndza cheese, a traditional Slovak cheese fulfilling European Food Safety Authority (EFSA) requirements.
Collapse
Affiliation(s)
| | | | | | | | | | - Vladimir Kmet
- Institute of Animal Physiology, Slovak Academy of Sciences, Košice, Slovakia
| |
Collapse
|
14
|
Ge J, Fang B, Wang Y, Song G, Ping W. Bacillus subtilis enhances production of Paracin1.7, a bacteriocin produced by Lactobacillus paracasei HD1-7, isolated from Chinese fermented cabbage. ANN MICROBIOL 2014. [DOI: 10.1007/s13213-014-0817-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
|
15
|
|