Staphylococcus aureus

Wed, 11/20/2019 - 04:08
Author(s): Talita Junia da Silva Cândido, Anderson Clayton da Silva, Luiz Gustavo de Matos, Maristela da Silva do Nascimento, Carlos Henrique Camargo, Rosemeire Cobo Zanella, Vera Lúcia Mores Rall, Nathália Cristina Cirone SilvaAbstractThe aim of this study was to isolate, identify and perform molecular characterisation of Staphylococcus sp. isolated from the processing chain of organic and...
Wed, 11/20/2019 - 03:52
In this work, the photodynamic bactericidal effect of Rose Bengal (RB), combined with green LED light, against Staphylococcus aureus and Salmonella Typhimurium, was investigated. The interaction of RB concentration and illumination time was evaluated using a response surface methodology, and a second‐order polynomial empirical model was adjusted to the experimental data. The derived model...
Fri, 11/15/2019 - 03:28
This study aimed to assess the microbial contamination associated with the traditional processing of fresh pork into grilled pork in Benin. Sixty meat samples (fresh and processed pork) were randomly collected from different processing/selling sites, and the main foodborne microorganisms were sought. About 16.7% of samples exceeded the acceptable limit of <7.0 Log10 CFU g−1 recommended by the...
Fri, 11/15/2019 - 03:24
A series of cyclam- and cyclen-derived salts are described in the present work; they were designed specifically to gain insights into their structure and antibacterial activity towards Staphylococcus aureus and Escherichia coli, used respectively, as Gram-positive and Gram-negative model organisms. The newly synthesized compounds are monosubstituted and trans-disubstituted tetraazamacrocycles...
Thu, 11/14/2019 - 03:26
Aims To prevent the spread of brucellosis, a simple and rapid vertical flow technology for the detection of antibodies targeting brucellosis was developed. Methods and Results In this study, Brucella spp. lipopolysaccharide (LPS) was purified and used to detect brucellosis antibodies. Sheep IgG was used as a negative control. Colloidal gold‐labeled recombinant staphylococcus aureus protein A was...
Wed, 11/13/2019 - 03:35
Author(s): Zhouyi Zhang, Weijia Zhang, Changkao Mu, Ronghua Li, Weiwei Song, Yangfang Ye, Ce Shi, Lei Liu, Huan Wang, Chunlin WangAbstractGalectins are a family of β-galactoside-binding lectins that play key roles in the invertebrate innate immunity system, but no galectin genes have been identified in the mud crab (Scylla paramamosain) so far. The present study is the first to clone a galectin...
Wed, 11/13/2019 - 03:25
MraW is a 16S rRNA methyltransferase and plays a role in the fine-tuning of the ribosomal decoding center. It was recently found to contribute to the virulence of Staphylococcus aureus. In this study, we examined the function of MraW in Escherichia coli O157:H7 and found that the deletion of mraW led to decreased motility, flagellar production and DNA methylation. Whole-genome bisulfite...
Mon, 11/11/2019 - 03:33
Author(s): N.G.C. Vasileiou, P.J. Cripps, K.S. Ioannidi, A.I. Katsafadou, D.C. Chatzopoulos, M.S. Barbagianni, V. Tsioli, E. Dermisiadou, E. Karavanis, N. Papadopoulos, D. Lianou, V.S. Mavrogianni, E. Petinaki, G.C. FthenakisAbstractAlthough coagulase-negative staphylococci are the primary aetiological agents of subclinical mastitis in ewes, there is little information regarding vaccination...
Mon, 11/11/2019 - 03:28
Attiéké is the major fermented plant food in Côte d'Ivoire. The aim of this study was to identify hazards and critical control points (CCP) in order to implement a HACCP system for the production of attiéké. Physico‐chemical and microbiological analyses were carried out. pH of the cossettes used as raw material for attieke process was slightly acidic (6·5 ± 0·23). But attiéké produced had an acid...
Mon, 11/11/2019 - 03:27
Alginate‐based edible coating acts as a carrier enabling the sustained release of thyme oil to the surface of the fresh‐cut apples, inhibiting the growth of Listeria monocytogenes, Salmonella Typhimurium, Staphylococcus aureus and Escherichia coli O157:H7 inoculated onto fresh‐cut apples. Summary In this study, the inhibition of an alginate‐based edible coating (EC) containing thyme oil (0.05%, 0...
Sun, 11/10/2019 - 03:32
Author(s): Ayhan Duran, Halil Ibrahim KahveAbstractBeef is an animal food sensitive to deterioration due to its rich nutrient content. Therefore, some preservation techniques are applied. These include vacuum packaging, a modified atmosphere, a controlled atmosphere and an edible film coating. In this study, it was aimed to extend the shelf life of beef using vacuum packaging (VP) and chitosan...
Thu, 11/07/2019 - 03:29
The microbial population of kefir made from Korean kefir grain was profiled via next‐generation sequencing technology at the species level. Interestingly, Acetobacter fabarum was the second most predominent bacteria in kefir. We isolated Acetobacter fabarum DH1801 strain and revealed its potent and broad‐spectrum antimicrobial activity against pathogenic bacteria. This could contribute to the...
Thu, 11/07/2019 - 03:26
This study examines treatments of the bacterial pathogen Staphylococcus aureus, namely, in the context of its being a major cause of subclinical bovine mastitis. Such infections caused by S. aureus among dairy cows are difficult to detect and can easily become chronic, leading to reduced productivity and large losses for dairy manufacturers. In this study, the role of alternative sigma factor B (...
Tue, 11/05/2019 - 03:27
Staphylococcus aureus is a bacterial pathogen that causes food poisoning, various infections, and sepsis. Effective strategies and new drugs are needed to control S. aureus associated infections due to the emergence and rapid dissemination of antibiotic resistance. In the present study, the antibacterial activity, potential mode of action, and applications of flavonoids from licorice were...
Tue, 11/05/2019 - 03:27
Antimicrobial photodynamic therapy (aPDT) has been shown as a promising technique to inactivate foodborne bacteria, without inducing the development of bacterial resistance. Knowing that addition of inorganic salts, such as potassium iodide (KI), can modulate the photodynamic action of the photosensitizer (PS), we report in this study the antimicrobial effect of eosin (EOS) and rose bengal (RB)...
Mon, 11/04/2019 - 03:25
The chemical and anti-nutritional, antioxidative and anti-microbial properties of seeds from Acacia cyclops, Acacia microbotrya and Acacia victoriae(which are legumes) traditionally consumed by indigenous Western Australians were studied for the first time for their potential as commercial food components. A. microbotrya (2.7 CIU/g) (α < 0.05) had the highest α-chymotrypsin inhibitor activity...
Sun, 11/03/2019 - 02:35
Author(s): Brisha Arulrajah, Belal J. Muhialdin, Mohammad Zarei, Hanan Hasan, Nazamid SaariAbstractKenaf seeds are a promising source of natural preservatives for food applications due to their potential as a substrate to generate peptides with high antibacterial activity. We sought to generate bioactive peptides with antibacterial activity from Kenaf seed proteins via lacto-fermentation. The...
Sun, 11/03/2019 - 02:25
Defeat of the antibiotic resistance of pathogenic bacteria is one great challenge today and for the future. In the last century many classes of effective antibacterials have been developed, so that upcoming resistances could be met with novel drugs of various compound classes. Meanwhile, there is a certain lack of research of the pharmaceutical companies, and thus there are missing developments...
Sat, 11/02/2019 - 03:26
Chrysoperla sinica (Tjeder) is widely recognized as an important holometabolous natural enemy of various insect pests in different cropping systems and as a non-target surrogate in environmental risk assessment of Bt rice (i.e., genetically modified rice to express a toxin gene from Bacillus thuringiensis). Like other complex organisms, abundant microbes live inside C. sinica; however, to date,...
Sat, 11/02/2019 - 03:26
Author(s): Esmeray Kuley, Mebrure Nüket Yavuzer, Emre Yavuzer, Mustafa Durmuş, Hatice Yazgan, Yekta Gezginç, Fatih Özogul The impact of safflower (Carthamus tinctorius) and bitter melon (Momordica charantia L.) extracts on growth of fish spoilage bacteria (Acinetobacter lwoffii, Pseudomonas oryzihabitans, Enterobacter cloacae, Shigella spp., Morganella psychrotolerans, Photobacterium phosphoreum...
Thu, 10/31/2019 - 03:35
Author(s): Junxin Zhao, Ting Peng, Shibo Liang, Maomao Ma, Zheling Zeng, Ping Yu, Deming Gong, Shuguang DengAbstractThe application of dodecyl gallate (DG) is limited due to its poor stability and water-solubility. A new compound of DG microencapsulated with methyl-β-cyclodextrin (MβCD), MβCD-DG was produced, and the inhibition effects of MβCD-DG against three common foodborne pathogens (...
Thu, 10/31/2019 - 03:25
This longitudinal study aimed to evaluate the impact of subclinical intramammary infection (IMI) with non-aureus staphylococcal (NAS) species in the first 18 d in milk (DIM) on the quarter milk somatic cell count (qSCC) and quarter milk yield (qMY) during the first 4 mo of lactation in Holstein Friesian heifers. Quarter milk samples were collected from 82 heifers from 1 to 4 DIM until 130 DIM on...
Wed, 10/30/2019 - 03:38
ABSTRACT Big defensins, ancestors of β-defensins, are composed of a β-defensin-like C-terminal domain and a globular hydrophobic ancestral N-terminal domain. This unique structure is found in a limited number of phylogenetically distant species, including mollusks, ancestral chelicerates, and early-branching cephalochordates, mostly living in marine environments. One puzzling...
Wed, 10/30/2019 - 03:38
ABSTRACT Sporadic literature reports describe isolates of pathogenic bacteria that harbor an antibiotic resistance determinant but remain susceptible to the corresponding antibiotic as a consequence of a genetic defect. Such strains represent a source from which antibiotic resistance may reemerge to cause treatment failure in patients. Here, we report a systematic investigation into the...
Wed, 10/30/2019 - 03:30
Formulation of bio‐degradable active and intelligent food packaging films Propolis extract resulted as an active material for food packaging Anthocyanin preformed as an intelligent material for food packaging Formulated films enhanced food quality, shelf life, and freshness Formulations had shown good antibacterial property against Escherichia coli and methicillin‐resistant Staphylococcus aureus...
Wed, 10/30/2019 - 03:27
Outcome of patients with blood stream infections (BSI) depends on the rapid initiation of adequate antibiotic therapy, which relies on the fast and reliable identification of the underlying pathogen. Blood cultures (BC) using CO2-sensitive colorimetric indicators and subsequent microbiological culturing are the diagnostic gold standard but turnaround times range between 24 and 48 h. The detection...
Wed, 10/30/2019 - 03:26
Staphylococcus aureus bacteremia is one of the most frequent and severe bacterial infections worldwide. The increased incidence of S. aureus infections with a diverse pattern of S. aureus protein A (spa) types across different geographic regions is a global challenge. This study investigated a novel spa type of methicillin-resistant S. aureus in a clinically isolated specimen. A total of 109...
Tue, 10/29/2019 - 03:30
Essential oils (EOs) are natural substances extracted from aromatic and medicinal plants (AMPs), important in food preservation. Several studies have shown that AMPs, as well as their EOs have antimicrobial (antibacterial and antifungal) activity. Indeed, our in vitro studies have shown that oregano and thyme EOs are effective against foodborne bacteria, isolated from fermented meat products and...
Mon, 10/28/2019 - 03:44
Author(s): Miaomiao Liu, Mingxing Feng, Kun Yang, Youfang Cao, Jie Zhang, Junnan Xu, Santiago Hernández Hernández, Xinyuan Wei, Mingtao FanAbstractPersimmon tannin (PT) exhibits antibacterial activity against methicillin-resistant Staphylococcus aureus (MRSA) isolated from retail pork. The involved molecular mechanisms were investigated for the first time using transcriptome and metabolome in...
Mon, 10/28/2019 - 03:38
The above article from the Journal of Food Safety, published online on October 22, 2018 in Wiley Online Library (https://onlinelibrary.wiley.com/doi/full/10.1111/jfs.12501), has been retracted by agreement between the journal Editor‐in‐Chief, Vivian Wu and Wiley Periodicals, Inc. The retraction has been agreed due to evidence indicating that the peer review of this paper was compromised and...
Mon, 10/28/2019 - 03:38
The above article from the Journal of Food Safety, published online on November 23, 2018 in Wiley Online Library (https://onlinelibrary.wiley.com/doi/full/10.1111/jfs.12573), has been retracted by agreement between the journal Editor‐in‐Chief, Vivian Wu and Wiley Periodicals, Inc. The retraction has been agreed due to evidence indicating that the peer review of this paper was compromised and...
Sun, 10/27/2019 - 03:49
Author(s): Qiying Wang, Hao Li, Kaimin Zhou, Xiang Qin, Qun Wang, Weiwei LiAbstractThe Rab family is the most significant subfamily of small GTP-binding proteins. These proteins have widespread intracellular localization and play an important role in many biological processes. Rab7 plays a crucial role in the innate immune system of crustaceans. In the present study, we cloned and characterized...
Sat, 10/26/2019 - 03:48
Author(s): M.J. Fraqueza, C. Martins, L.T. Gama, M.H. Fernandes, M.J. Fernandes, M.H.L. Ribeiro, B.R. Hernando, A.S. Barreto, A.J.I. AlfaiaAbstractThe effect of high hydrostatic pressure (HHP) on the microbial load and physical properties of natural casings, red pepper (Capsicum annuum L.) and garlic (Allium sativum) paste was studied. HHP treatments were performed according to a Response Surface...
Fri, 10/25/2019 - 03:44
Author(s): K.L. Hu, X.Q. Yu, J. Chen, J.N. Tang, L.Z. Wang, Y.M. Li, C. TangAbstractThe 3-methyl-butanal and 3-methyl-butanoic acid are known as fingerprint compounds from Staphylococcus aureus. In this study, we investigated production of these two volatile biomarkers and their correlation to S. aureus growth in pork. Both 3-methyl-butanal and 3-methyl-butanoic acid presented high specificity...
Fri, 10/25/2019 - 03:38
Predicted and experimental values of Staphylococcus aureus during the storage period (log CFU/g).S. aureus can be inactivated in the early periods in probiotic cheese produced by using Lactobacillus rhamnosus and Lactobacillus casei Shirota together with the starter culture. In addition, this work recommends that the proposed. Fourier series‐modeling method provides the possibility to calculate...
Fri, 10/25/2019 - 03:33
The aim of this study was to explore the phytochemical composition, heavy metals analysis and the antibacterial activity of six medicinal plants i.e., Terminalia chebula Retz (fruits), Aegle marmelos L., (fruits), Curcuma longa L., (rhizomes), Syzygium aromaticum L., (flower buds), Piper nigrum L., (seeds), Cinnamomum cassia L., (barks) and its two remedial recipes (recipe 1 and 2) used against...
Thu, 10/24/2019 - 03:48
Genomic surveillance that combines bacterial sequencing and epidemiological information will become the gold standard for outbreak detection, but its clinical translation is hampered by the lack of automated interpretation tools. We performed a prospective pilot study to evaluate the analysis of methicillin-resistant Staphylococcus aureus (MRSA) genomes using the Next Gen Diagnostics (NGD)...
Thu, 10/24/2019 - 03:42
Author(s): Maryam Azizi-lalabadi, Ali Ehsani, Babak Ghanbarzadeh, Bahark DivbandAbstractRecently, oxo-biodegradable polymers have attracted much attention due to taking less time to break down after disposal in comparison to ordinary polymers. Polyvinyl alcohol/gelatin (PVA/G) nanocomposite films, containing ZnO, TiO2 or ZnO/TiO2 nanoparticles supported on 4A zeolite (4A z), are novel active...
Wed, 10/23/2019 - 03:50
Horizontal transfer of plasmids encoding antimicrobial resistance and virulence determinants has been instrumental in Staphylococcus aureus evolution, including the emergence of community-associated methicillin-resistant S. aureus (CA-MRSA). In the early 1990s, the first CA-MRSA strain isolated in Western Australia (WA), WA-5, encoded cadmium, tetracycline, and penicillin resistance genes on...
Wed, 10/23/2019 - 03:46
Author(s): Stanley H. Chen, Narelle Fegan, Chawalit Kocharunchitt, John P. Bowman, Lesley L. DuffyAbstractUnderstanding the bacterial community profile through poultry processing could help the industry to produce better poultry products. In this study, 10 chicken carcasses were randomly sampled from before and after scalding, before and after immersion chilling, and after air chilling each...
Tue, 10/22/2019 - 03:30
This work aimed at investigating the chemical composition, antibacterial properties, and effect mechanism of Smilax china L. polyphenols (SCLP). SCLP was extracted and purified, and then, its eighteen polyphenolic compounds were identified by LC-MS/MS analysis. SCLP exhibited antibacterial activity against five bacteria (Salmonella typhimurium, Listeria monocytogenes, Staphylococcus aureus,...
Mon, 10/21/2019 - 03:39
Author(s): Tiantian Min, Zhu Zhu, Xiaoli Sun, Zhipeng Yuan, Junwei Zha, Yongqiang WenAbstractIn this work, a multifunctional food packaging composite coating with transparent, biodegradable, antifogging and antibacterial properties was designed and fabricated by quaternary ammonium salt modified chitosan (HACC) and poly (vinyl alcohol) (PVA) via a facile and environment-friendly solution casting...
Sun, 10/20/2019 - 03:37
LWT
Author(s): Aleksandra M. Kocot, Magdalena A. OlszewskaAbstractBiofilms pose a serious hygienic concern in the food processing environment due to the strong antimicrobial tolerance and thus higher risk of food contamination. The aim of this study was to investigate dual species biofilm formation of P. aeruginosa ATCC 27853 or S. aureus FI 2 with L. innocua FI 2 and biofilm inactivation using QAC...
Fri, 10/18/2019 - 03:29
Methicillin-resistant Staphylococcus aureus (MRSA) strains are important human pathogens and a significant health hazard for hospitals and the food industry. They are resistant to β-lactam antibiotics including methicillin and extremely difficult to treat. In this study, we show that the Staphylococcus aureus COL (MRSA) strain, with a known complete genome, can easily survive and grow under...
Thu, 10/17/2019 - 03:33
Food poisoning caused by Staphylococcus aureus is responsible for staphylococcal enterotoxin (SE) produced in foods. Staphylococcal food poisoning is mostly caused by staphylococcal enterotoxin type A (SEA) among SEs. Growth/no growth for S. aureus under various environmental conditions was well studied with a logistic regression model so far. Recently we successfully described the boundaries of...
Thu, 10/17/2019 - 03:32
The combined effect of sodium erythorbate, stable chlorine dioxide, and gellan gum glazing on quality of peeled shrimp was investigated during frozen storage, and compared with traditional water‐ice‐glazing treatment. Data revealed that the growth of total aerobes, Escherichia coli, and Staphylococcus aureus was significantly inhibited in the combined treatment, compared to the water‐ice‐glazing...
Thu, 10/17/2019 - 03:31
Food contact surfaces (FCS) in food processing facilities may become contaminated with a number of unwanted microorganisms, such as Listeria monocytogenes, Escherichia coli O157:H7, and Staphylococcus aureus. To reduce contamination and the spread of disease, these surfaces may be treated with sanitizers or have active antimicrobial components adhered to them. Although significant efforts have...
Wed, 10/16/2019 - 03:33
The capsaicin in hot peppers is an important biological active substance that is widely used in food and medicine. Our current study shows that capsaicin derivatives have good antioxidant and antibacterial activities, and therefore, the present study of capsaicin derivatives with good activity provides a good foundation for future applications in natural food additives and medicine. Abstract The...
Tue, 10/15/2019 - 03:47
Author(s): Katesaraporn Nuankeaw, Boonyanoot Chaiyosang, Thanapat Suebrasri, Somdej Kanokmedhakul, Saisaamorn Lumyong, Sophon BoonlueAbstractBioactive compounds of endophytic fungus Trichoderma polyalthiae were extracted from culture broth media. The crude extracts showed strong antimicrobial activity against human pathogens. Biologically active compounds were isolated and purified by...

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