scholarly journals Exploring the Ambiguous Status of Coagulase-Negative Staphylococci in the Biosafety of Fermented Meats: The Case of Antibacterial Activity Versus Biogenic Amine Formation

2020 ◽  
Vol 8 (2) ◽  
pp. 167 ◽  
Author(s):  
David Van der Veken ◽  
Rafik Benhachemi ◽  
Christina Charmpi ◽  
Lore Ockerman ◽  
Marijke Poortmans ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Biogenic Amine ◽  
High Performance ◽  
Meat Products ◽  
Starter Cultures ◽  
Coagulase Negative Staphylococci ◽  
Prolonged Incubation ◽  
Interesting Candidate ◽  
Low Incidence ◽  
And Staphylococcus Aureus

A total of 332 staphylococcal strains, mainly isolated from meat, were screened for antibacterial activity. Eighteen strains exhibited antibacterial activity towards species within the same genus. These antibacterial strains were further screened against Clostridium botulinum, to assess their potential as anticlostridial starter cultures for the development of fermented meat products without added nitrate or nitrite. Only Staphylococcus sciuri IMDO-S72 had the ability to inhibit all clostridial strains tested, whilst displaying additional activity against Bacillus cereus, Listeria monocytogenes and Staphylococcus aureus. Apart from their potential as bioprotective cultures, the staphylococcal collection was also screened for biogenic amine production, as these compounds may compromise food quality. To this end, ultra-high-performance liquid chromatography coupled to tandem mass spectrometry (UPLC-MS/MS) was applied. A low incidence of biogenic amine production was found, with tyramine and β-phenylethylamine being the most prevalent ones. Concentrations remained relatively low (< 52 mg/L) after a prolonged incubation period, posing no or little threat towards food safety. Taken together, S. sciuri IMDO-S72 could serve as an interesting candidate for the bioprotection of fermented meats as it showed promising antibacterial activity as well as absence of biogenic amine production.

scholarly journals Histamine in Foods: Its Safety and Human Health Implications

2014 ◽  
Vol 8 ◽  
pp. 1-11 ◽  
Author(s):  
Krishna Prasad Rai ◽  
Hare Ram Pradhan ◽  
Bal Kumari Sharma ◽  
Som Kant Rijal
Keyword(s):  
Biogenic Amine ◽  
High Performance ◽  
Histidine Decarboxylase ◽  
Meat Products ◽  
Alcoholic Beverages ◽  
Decarboxylase Activity ◽  
Technological Advancement ◽  
Elisa Technique ◽  
Surveillance Mechanism ◽  
Protein Rich

This article reviews the overall aspects of histamine, one of the most potent biogenic amine, which is formed by decarboxylation of histidine protein rich foods in fish and fish products, dairy products, meat and meat products, fermented vegetables and soy products, and alcoholic beverages such as wine and beer. Normally, three basic conditions i.e. high content of free histidine, bacterial histidine decarboxylase activity and high temperature storage environment elevates the level of histamine in foods. Several chromatographic methods utilizing thin layer chromatography (TLC), high performance liquid chromatography (HPLC), gas chromatography (GC) and colorimetry, fluorimetry and ELISA technique have been developed for the analysis of biogenic amine including histamine. Histamine usually exceeding 1000 mg/kg has been implicated with scombrotoxicosis. Several government authorities including Codex Alimentarious Commission has also set the level of histamine in different food products varying from 5 to 40 mg/100g. Proper technical regulations and surveillance mechanism as well as hygienic and bio-technological advancement in food manufacturing establishment could be the good preventive measures of low histamine foods in future.  DOI: http://dx.doi.org/10.3126/jfstn.v8i0.11720 J. Food Sci. Technol. Nepal, Vol. 8 (1-11), 2013

scholarly journals Formation of Biogenic Amines in Pa (Green Onion) Kimchi and Gat (Mustard Leaf) Kimchi

Foods ◽  
2019 ◽  
Vol 8 (3) ◽  
pp. 109 ◽  
Author(s):  
Jun-Hee Lee ◽  
Young Jin ◽  
Young Park ◽  
Se Yun ◽  
Jae-Hyung Mah
Keyword(s):  
Biogenic Amines ◽  
Biogenic Amine ◽  
High Performance ◽  
Lactobacillus Brevis ◽  
Starter Cultures ◽  
Dependent Manner ◽  
16S Rrna Sequence ◽  
Amine Content ◽  
Seafood Products ◽  
16S Rrna Sequence Analysis

In this study, biogenic amine content in Pa (green onion) kimchi and Gat (mustard leaf) kimchi, Korean specialty kimchi types, was determined by high-performance liquid chromatography (HPLC). Many kimchi samples contained low levels of biogenic amines, but some samples had histamine and tyramine content over the safe levels. Based on the comparative analysis between the ingredient information on food labels and biogenic amine content of kimchi samples, Myeolchi-aekjeot appeared to be an important source of biogenic amines in both kimchi. Besides, through the 16s rRNA sequence analysis, Lactobacillus brevis appeared to be responsible for the formation of biogenic amines (tyramine, β-phenylethylamine, putrescine, and cadaverine) in both kimchi, in a strain-dependent manner. During fermentation, a higher accumulation of tyramine, β-phenylethylamine, and putrescine was observed in both or one (for putrescine) of kimchi types when L. brevis strains served as inocula. The addition of Myeolchi-aekjeot affected the initial concentrations of most biogenic amines (except for spermidine in Gat kimchi) in both kimchi. Therefore, this study suggests that using appropriately salted and fermented seafood products for kimchi preparation and using biogenic amine-negative and/or biogenic amine-degrading starter cultures would be effective in reducing biogenic amine content in Pa kimchi and Gat kimchi.

scholarly journals Safety Evaluation of the Coagulase-Negative Staphylococci Microbiota of Salami: Superantigenic Toxin Production and Antimicrobial Resistance

2015 ◽  
Vol 2015 ◽  
pp. 1-17 ◽  
Author(s):  
Raquel Soares Casaes Nunes ◽  
Eduardo Mere Del Aguila ◽  
Vânia Margaret Flosi Paschoalin
Keyword(s):  
Phylogenetic Analyses ◽  
Food Poisoning ◽  
Meat Products ◽  
Safety Evaluation ◽  
Toxin Production ◽  
Effective Control ◽  
Coagulase Negative Staphylococci ◽  
Enterotoxin Genes ◽  
Low Incidence

The risks of contracting staphylococci food poisoning by the consumption of improperly manufactured salami and the possibility of this food being reservoirs for antibiotic resistance were evaluated. Nineteen coagulase-negative staphylococci (CNS) strains were found in commercial and artisanal salami. The species in commercial salami wereS. saprophyticus,S. sciuri,S. xylosus, andS. carnosus. Artisanal salami showedS. succinus,S. epidermidis, andS. hominisbut noS. carnosus. Phylogenetic analyses grouped the strains into three major staphylococcal species groups, comprised of 4 refined clusters with similarities superior to 90%. Fifteen strains harbored multiple enterotoxin genes, with high incidence ofseb/secandsea, 57% and 50%, respectively, intermediate incidence ofsed/seh/selmandsei/seln/tst-H, 33% and 27%, correspondingly, and low incidence ofsee/selj/seloandseg, of respectively 13% and 1%. Real time RT-PCR and enzyme-linked-immunosorbent assays confirmed the enterotoxigenicity of the strains, which expressed and produced enterotoxinsin vitro. The CNS strains showed multiresistance to several antimicrobials of therapeutic importance in both human and veterinarian medicine, such asβ-lactams, vancomycin, and linezolid. The effective control of undue staphylococci in fermented meat products should be adopted to prevent or limit the risk of food poisoning and the spread of antimicrobial-resistant strains.

scholarly journals Selection of nitrite-degrading and biogenic amine-degrading strains and its involved genes

2020 ◽  
Vol 4 (4) ◽  
pp. 225-235
Author(s):  
Yuxin Li ◽  
Zhihui Yu ◽  
Yingchun Zhu ◽  
Zhixiang Cao
Keyword(s):  
High Performance ◽  
Histidine Decarboxylase ◽  
Meat Products ◽  
Starter Cultures ◽  
Health Concern ◽  
Fermented Sausages ◽  
Degradation Rates ◽  
Genes Encoding ◽  
Encoding Genes ◽  
Selection Of

Abstract Objectives Accumulation of nitrite and biogenic amines (BAs) in fermented meat products is a matter of public health concern. The study aimed to screen nitrite-degrading and BA-degrading strains from sour porridges and sausages and bacon products in China. Materials and Methods After screening out 12 strains, the degradation of nitrite, the degradation of BAs, the activities of nitrite-reducing enzymes, and the detection of genes involved in the BAs were assessed by spectrophotometry method with hydrochloric acid naphthalene ethylenediamine, high-performance liquid chromatography, GENMED kit, and polymerase chain reaction, respectively. Results Pediococcus pentosaceus labelled M SZ1 2 and M GC 2, Lactobacillus plantarum labelled M SZ2 2, and Staphylococcus xylosus labelled Y CC 3 were selected. The activity of nitrite-reducing enzyme in M SZ2 2 was 2.663 units/mg. The degradation rate of total BAs of M SZ2 2 was 93.24%. The degradation rates of nitrite and BAs of M SZ1 2 were 86.49% and 37.87%, respectively. The activity of nitrite-reducing enzyme in M SZ1 2 was up to 1.962 units/mg. M GC 2 showed higher degradation rates of nitrite (89.19%) and Y CC 3 showed higher degradation rates of BAs (36.16%). The genes encoding the multicopper oxidases (suf I/D2EK17) were detected in the four strains, which also did not contain BAs (histidine decarboxylase (hdc), tyrosine decarboxylase (tdc), ornithine decarboxylase (odc), lysine decarboxylase (ldc)) formation encoding genes. Conclusion These four strains (M SZ1 2, M GC 2, M SZ2 2, and Y CC 3) are promising candidates to use as starter cultures for nitrite and BAs in fermented sausages.

scholarly journals The Occurrence of Biogenic Amines and Determination of Biogenic Amine-Producing Lactic Acid Bacteria in Kkakdugi and Chonggak Kimchi

Foods ◽  
2019 ◽  
Vol 8 (2) ◽  
pp. 73 ◽  
Author(s):  
Young Hun Jin ◽  
Jae Hoan Lee ◽  
Young Kyung Park ◽  
Jun-Hee Lee ◽  
Jae-Hyung Mah
Keyword(s):  
Lactic Acid ◽  
Lactic Acid Bacteria ◽  
Biogenic Amines ◽  
Biogenic Amine ◽  
High Performance ◽  
Lactobacillus Brevis ◽  
Starter Cultures ◽  
Sequencing Analysis ◽  
Amine Content

In this study, biogenic amine content in two types of fermented radish kimchi (Kkakdugi and Chonggak kimchi) was determined by high performance liquid chromatography (HPLC). While most samples had low levels of biogenic amines, some samples contained histamine content over the toxicity limit. Additionally, significant amounts of total biogenic amines were detected in certain samples due to high levels of putrefactive amines. As one of the significant factors influencing biogenic amine content in both radish kimchi, Myeolchi-aekjoet appeared to be important source of histamine. Besides, tyramine-producing strains of lactic acid bacteria existed in both radish kimchi. Through 16s rRNA sequencing analysis, the dominant species of tyramine-producing strains was identified as Lactobacillus brevis, which suggests that the species is responsible for tyramine formation in both radish kimchi. During fermentation, a higher tyramine accumulation was observed in both radish kimchi when L. brevis strains were used as inocula. The addition of Myeolchi-aekjeot affected the initial concentrations of histamine and cadaverine in both radish kimchi. Therefore, this study suggests that reducing the ratio of Myeolchi-aekjeot to other ingredients (and/or using Myeolchi-aekjeot with low biogenic amine content) and using starter cultures with ability to degrade and/or inability to produce biogenic amines would be effective in reducing biogenic amine content in Kkakdugi and Chonggak kimchi.

scholarly journals Evaluation of the in vitro antibacterial activity of some essential oils and their blends against Staphylococcus spp. isolated from episodes of sheep mastitis

2021 ◽  
Author(s):  
Filippo Fratini ◽  
Margherita Giusti ◽  
Simone Mancini ◽  
Francesca Pisseri ◽  
Basma Najar ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Essential Oils ◽  
Diffusion Method ◽  
Minimal Bactericidal Concentration ◽  
Coagulase Negative Staphylococci ◽  
Disk Diffusion Method ◽  
In Vitro Antibacterial Activity ◽  
High Concentrations ◽  
Thymus Serpyllum

AbstractStaphylococcus aureus and coagulase-negative staphylococci are among the major causes of mastitis in sheep. The main goal of this research was to determine the in vitro antibacterial activity of several essential oils (EOs, n 30), then five of them were chosen and tested alone and in blends against staphylococci isolates. Five bacteria were isolated from episodes of ovine mastitis (two S. aureus and three S. xylosus). Biochemical and molecular methods were employed to identify the isolates and disk diffusion method was performed to determine their antimicrobial-resistance profile. The relative percentage of the main constituents in the tested essential oils and their blends was detected by GC-EIMS analysis. Antibacterial and bactericidal effectiveness of essential oils and blends were evaluated through minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC). All of them showed sensitivity to the used antimicrobials. The EOs with the highest antibacterial activity were those belonging to the Lamiaceae family characterized by high concentrations of thymol, carvacrol and its precursor p-cymene, together with cinnamon EO, rich in cinnamaldehyde. In terms of both MIC and MBC values, the blend composed by Thymus capitatus EO 40%, Cinnamomum zeylanicum EO 20%, Thymus serpyllum EO 20% and Satureja montana EO 20% was found to be the most effective against all the isolates. Some essential oils appear to represent, at least in vitro, a valid tool against ovine mastitis pathogens. Some blends showed a remarkable effectiveness than the single oils, highlighting a synergistic effect in relation to the phytocomplex.

scholarly journals PSV-25 Detection of heart and aorta tissue peptide markers by the multiple-reaction monitoring method

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 362-363
Author(s):  
Daniil Khvostov ◽  
Natalya Vostrikova ◽  
Irina M Chernukha
Keyword(s):  
Amino Acid ◽  
High Performance ◽  
Multiple Reaction Monitoring ◽  
Meat Product ◽  
Meat Products ◽  
Amino Acid Sequences ◽  
Composition Analysis ◽  
Reaction Monitoring ◽  
Russian Science ◽  
Monitoring Method

Abstract Functional, particularly personalized meat-based foods are of more in demand by a consumer today. Functional additives, such as plant components and animal proteins from bovine or porcine tissues have been successfully used. With many ingredients added to foods, it is important to provide quality and composition monitoring to confirm the products’ authenticity, to identify undeclared or rarely used types of raw meat in product formulations. For example, if animal heart tissue is a component of a product formulation or if aorta tissue presents in a product due to improper trimming. Different methods are used to identify raw materials, including new approaches in proteomics and peptidomics that are considered the most effective modern methods nowadays. The purpose of the study is meat product composition analysis and special biomarker peptide identification to confirm the presence of heart and aorta tissue in a finished meat product. Over 20 amino acid sequences were checked based on earlier obtained data. Those amino acid sequences were analyzed with a high-performance liquid chromatography with mass spectrometric detection as described. The MS settings were selected using the Skyline. Signal-to-Noise ratio (S/N) over 10 units were used to choose the best peptide candidates. Seven peptides were found in porcine hearts. The best candidate was peptide VNVDEVGGEALGR (S/N - 73.10±5.3) from β-Hemoglobin. Two marker peptides from serum albumin were selected for pork aorta: TVLGNFAAFVQK (S/N 53.51±2.4) and EVTEFAK (S/N 31.69±4.1). These biomarkers showed the best detection and specificity. The multiply reaction monitoring method made it possible to identify the most/best specific peptides—biomarkers that could confirm the heart and/or aorta in meat products. The method can be used for comparative research or identification of best peptides that are specific to any type of animal tissue. The work was supported by the Russian Science Foundation, project no. 16-16- 10073.

scholarly journals Synthesis and antimicrobial activities of novel n-substituted 8-(1-alkyl/alkylsulphonyl/alkoxycarbonyl-benzimidazol-2-ylmethoxy)-5-chloroquinolines

2011 ◽  
Vol 76 (9) ◽  
pp. 1199-1206 ◽  
Author(s):  
Raju Chaudhari ◽  
Sahebrao Rindhe
Keyword(s):  
Staphylococcus Aureus ◽  
Antibacterial Activity ◽  
Nitrogen Heterocycles ◽  
Antimicrobial Activities ◽  
Mass Spectral Data ◽  
Antifungal Activities ◽  
Mass Spectral ◽  
Electrophilic Reagents ◽  
Almost All ◽  
And Staphylococcus Aureus

Herein the synthesis of a series of novel 8-(1- alkyl/alkylsulphonyl/alkoxycarbonyl-benzimidazol-2-ylmethoxy)-5- chloroquinoline derivatives is reported. These derivatives were prepared by the condensation of o-phenylenediamine with [(5-chloroquinolin-8- yl)oxy]acetic acid, followed by substitution at nitrogen with different electrophilic reagents in presence of an appropriate base to give a series of nitrogen heterocycles containing the benzimidazole and quinoline nuclei. The structures of the compounds were confirmed based on 1H-NMR, 13CNMR, IR and mass spectral data. Almost all the compounds exhibited promising antibacterial activity against Salmonella typhimurium and Staphylococcus aureus. Some of the compounds showed good antifungal activities against Aspergillus niger but the antifungal activities against Candida albicans were disappointing.

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