Staphylococcus aureus

Sun, 02/16/2020 - 03:42
Food safety problems pose a great threat to the health of consumers with the greatest burden in developing countries. Street-vended foods play a key role in providing many urban dwellers with cheap, nutritious, and accessible food, but when prepared in an unhygienic and unregulated environment, they could contribute to increased food safety burden. The study investigated the microbiological...
Sat, 02/15/2020 - 03:36
Author(s): Ryunkyoung Oh, Min Jeong Lee, Young-Ok Kim, Bo-Hye Nam, Hee Jeong Kong, Ju-Won Kim, Jung-yeon Park, Jung-Kil Seo, Dong-Gyun KimAbstractWe isolated and purified an antimicrobial peptide (AMP) from the mantle of the hard-shelled mussel, Mytilus coruscus. The peptide was purified through C18 reversed-phase high-performance liquid chromatography, and displayed antibacterial activity. Total...
Sat, 02/15/2020 - 03:28
Antibacterial packaging films were developed by incorporating tea polyphenol (TP) into corn distarch phosphate (CDP)/carboxymethyl cellulose (CMC) films via solvent casting. Incorporation of TP had a great influence on the physical properties of the composite films. The prepared composite films were evaluated by scanning electron microscopy and Fourier transform infrared spectroscopy, and their...
Sat, 02/15/2020 - 03:25
Invited review: Advances in nisin use for preservation of dairy products. By Ibarra-Sánchez et al., page 2041. Dairy products, in particular nonfermented products, are prone to contamination with foodborne pathogens, such as Listeria monocytogenes, Staphylococcus aureus, and Salmonella spp. Nisin, a widely used antimicrobial, is effective in certain dairy products. In this review, we discuss the...
Fri, 02/14/2020 - 03:33
Author(s): Michael A. Pfaller, Cecilia G. Carvalhaes, Caitlin J. Smith, Daniel J. Diekema, Mariana CastanheiraAbstractThe SENTRY Antimicrobial Surveillance Program has monitored bloodstream infections (BSI) from patients in medical centers worldwide since 1997. In this report, we examine the frequency of occurrence and antimicrobial susceptibility profiles of 6741 bacterial and 222 fungal...
Fri, 02/14/2020 - 03:31
LWT
Author(s): Stefania Frassinetti, Morena Gabriele, Eleonora Moccia, Vincenzo Longo, Diana Di GioiaAbstractThe growing concern on the antibiotic resistance spreading among bacteria has stimulated the search for valuable alternatives from plant sources. This study dealt with the potential use of hemp (Cannabis sativa L.) seeds extract to inhibit the growth of selected pathogenic enterobacteria and...
Fri, 02/14/2020 - 03:31
LWT
Author(s): Rasha Mohamed Ali Gharieb, Mai Farag Saad, Asmaa Salah Mohamed, Yasmine Hasanine TartorAbstractThis study targeting the characterization of new lytic phages and studying their impact on Staphylococcus aureus biofilm and growth in milk. Two lytic phages (vB_SauM_ME18 & vB_SauM_ME126) were isolated using 40 Multidrug-Resistant (MDR) S. aureus isolates. Four isolates (10%) were...
Fri, 02/14/2020 - 03:26
Background Aphids are common insect pests that feed on and excrete feces/honeydew on storage vegetables, especially in the temperate region of the northern hemisphere. The honeydew of aphids is an excellent growth medium for microorganisms. To explore the effects of aphid infestation on the risk of microbial contamination and food safety, the bacterial diversity and community in aphid honeydew...
Fri, 02/14/2020 - 03:26
This study aims to produce a biodegradable active packaging film that is pH sensitive, and has a good antioxidant and antimicrobial activity. To do this, a novel phenolic extract was interfacially assembled onto a cellulose film, resulting in a film with a pH-triggered release mechanism of the active polyphenol agent. First, an aqueous extraction of cashew nut testa (CTE) was performed and...
Fri, 02/14/2020 - 03:25
Staphylococcus aureus (S. aureus)-associated infections are one of the major threats to public health. The aim of the present study was to determine the antibiotic resistance pattern, as well as the genetic characterization, of methicillin and vancomycin-resistant S. aureus (VRSA) isolated from a tertiary care hospital in Lahore. The S. aureus isolates were isolated from different clinical...
Thu, 02/13/2020 - 04:06
Intensive poultry production due to public demand raises the risk of contamination, creating potential foodborne hazards to consumers. The prevalence and microbial load of the pathogens Campylobacter, Salmonella, Staphylococcus aureus, and Escherichia coli was determined by standard methods at the farm level. After disinfection, swab samples collected from wall crevices, drinkers, and vents were...
Wed, 02/12/2020 - 10:50
Author(s): B. Tenderis, B. Kılıç, H. Yalçın, A. ŞimşekAbstractFoodborne illnesses affect the health of consumers worldwide, and thus searching for potential antimicrobial agents against foodborne pathogens is given an increased focus. This research evaluated the influence of sodium lactate (SL), encapsulated (e) and unencapsulated (u) polyphosphates (PP; sodium tripolyphosphate, STP; sodium acid...
Wed, 02/12/2020 - 10:49
Author(s): Michał Patrzałek, Maja Kosecka-Strojek, Klaudia Lisowska-Łysiak, Magdalena Trela, Mariusz Kot, Magdalena Gawlak, Dawid Liszka, Mieczysław Sajewicz, Barbara Tombarkiewicz, Krzysztof Pawlak, Jacek Międzobrodzki, Marcin W. LisAbstractThe spatial network structure of Dergall is based on substances nontoxic to humans and the environment which, when applied on solid surfaces, creates a...
Wed, 02/12/2020 - 03:25
Probiotics are important bacteria due to their benefit on human health. In this study, four strains of lactic acid bacteria from chicken bile were isolated and the strain with the best antimicrobial activity was selected for further identification and evaluation on its probiotic traits and safety. The strain was identified as Enterococcus faecium by biochemical characterization and 16S rDNA gene...
Tue, 02/11/2020 - 03:36
Author(s): Shahnawaz Ahmad Bhat, Fahmina Zafar, Aftab Hossain Mondal, Azar Ullah Mirza, Qazi Mohd Rizwanul Haq, Nahid NishatAbstractRemoval of harmful dyes and inhabitation of bacterial growth is one of the outstanding priorities in both environmental and industrial applications. The recognition of the alarming industrial discharge and insufficiency of fresh water has prompted us to develop eco-...
Tue, 02/11/2020 - 03:26
Group A streptococcus (GAS) is a versatile pathogen that causes a wide spectrum of diseases in humans. Invading host cells is a known strategy for GAS to avoid antibiotic killing and immune recognition. However, the underlying mechanisms of GAS resistance to intracellular killing need to be explored. Endothelial HMEC-1 cells were infected with GAS, methicillin-resistant Staphylococcus aureus (...
Sat, 02/08/2020 - 03:37
by Eszter Kovács, Judit Sahin-Tóth, Adrienn Tóthpál, Mark van der Linden, Tamás Tirczka, Orsolya Dobay Background The nasopharynx can from time to time accommodate otherwise pathogenic bacteria. This phenomenon is called asymptomatic carriage. However, in case of decreased immunity, viral infection or any other enhancing factors, severe disease can develop. Our aim in this study was to survey the...
Sat, 02/08/2020 - 03:35
Author(s): Foteini F. Parlapani, Ilario Ferrocino, Sofia Michailidou, Anagnostis Argiriou, Serkos A. Haroutounian, Lambros Kokokiris, Kalliopi Rantsiou, Ioannis S. BoziarisAbstractBacterial communities and Volatile Organic Compounds (VOCs) profile of deepwater rose shrimp (Parapenaeus longirostris) stored at 0 °C (ice) and 4 °C were investigated using 16S amplicon based sequencing and Solid phase...
Sat, 02/08/2020 - 03:35
Author(s): Arakkaveettil Kabeer Farha, Qiong-Qiong Yang, Gowoon Kim, Dan Zhang, Vuyo Mavumengwana, Olivier Habimana, Hua-Bin Li, Harold Corke, Ren-You GanAbstractStaphylococcus aureus, a foodborne pathogen, poses serious problems to the food industries owing to biofilm formation, and over 25% of the foodborne illnesses in China have been attributed to S. aureus only. Phytochemicals are widely...
Fri, 02/07/2020 - 04:07
Author(s): Danielle M. Schultze, Ricardo Couto, Feral Temelli, Lynn M. McMullen, Michael GänzleAbstractLow water activity (aW) foods permit the survival of low-infectious dose pathogens including Escherichia coli and Salmonella. Desiccation of non-heat resistant E. coli and Salmonella enterica increases their heat resistance; therefore, alternative methods are necessary to ensure the safety of...
Fri, 02/07/2020 - 03:53
Aims The purpose of this study was to isolate Lactobacillus from gastrointestinal tract of healthy post‐weaning piglets and investigate its synergistic antimicrobial and probiotic effects with ZnO nanoparticles (nZnO). Methods and Results Out of the 128 isolates, L. plantarum BLPL03 was selected based on its excellent acid and bile salt tolerance properties. L. plantarum BLPL03 was sensitive to β...
Fri, 02/07/2020 - 03:47
Our objective was to assess the enterotoxigenic potential of coagulase-negative staphylococci (CNS) isolated from bovine milk in Poland. We analyzed CNS isolates collected from 133 bovine milk batches from dairy farms in the Western Pomerania district during 2 milking seasons. A total of 163 isolates were screened by multiplex/duplex PCR for the presence of 18 of 25 enterotoxin genes identified...
Wed, 02/05/2020 - 03:30
The study assessed the antibacterial and antifungal effect of Moringa oleifera seed marinade on smoked Clarias gariepinus stored at ambient temperature for 15 days. The optimum effective concentration of moringa seed marinade that acts as antibacterial was found best to be 11.2 g/kg of fish moringa marinade. While 12.08 g/kg exhibited the highest anti‐yeast effect in Clarias gariepinus and 10.6 g...
Wed, 02/05/2020 - 03:26
Fresh foods are vulnerable to foodborne pathogens which cause foodborne illness and endanger people’s life and safety. The rapid detection of foodborne pathogens is crucial for food safety surveillance. An in situ-synthesized gene chip for the detection of foodborne pathogens on fresh-cut fruits and vegetables was developed. The target genes were identified and screened by comparing the specific...
Wed, 02/05/2020 - 03:26
Loranthus europaeus is a well-known and important medicinal plant, with a long history of traditional medicine use. Several studies showed that it contains many bioactive compounds with a wide range of pharmacological effects. In light of these past researches, L. europaeus were chosen to consider its potential antimicrobial action. To this aim, different protocols were performed to selectively...
Mon, 02/03/2020 - 03:34
Author(s): Yan-li Su, Guang-hua Wang, Jing-jing Wang, Bing Xie, Qin-qin Gu, Dong-fang Hao, Hong-mei Liu, Min ZhangAbstractAt present, several reports have indicated that the C-terminal peptides of tissue factor pathway inhibitor 1 (TFPI-1) were active antibacterial peptides. However, the functions of TFPI-1 C-terminal peptides in teleost are still very limited. In this study, a C-terminal peptide...
Mon, 02/03/2020 - 03:34
Author(s): Reza Roohi, Seyed Mohammad Bagher HashemiAbstractThe coupled 3D and transient form of heat and Maxwell's equations were solved to determine the temperature distribution within a carrot slice in the microwave cavity during pasteurization as a clean and energy saving process. To precisely simulate the turning of the sample, the dissipated thermal energy was applied to the carrot as a...
Mon, 02/03/2020 - 03:33
Author(s): Alonzo A. Gabriel, Cecile Leah T. Bayaga, Eiric A. Magallanes, Richard Paolo M. Aba, Karen May N. TanguiligAbstractThis study was conducted to address the dearth in works that simultaneously compare the growth and inactivation behaviors of selected pathogens in different milk products. In worst-case scenarios where hygienic practices are absent and heavy microbiological contaminations...
Mon, 02/03/2020 - 03:32
Author(s): Man-Seok Choi, Eun Bi Jeon, Ji Yoon Kim, Eun Ha Choi, Junsup Lim, Jinsung Choi, Shin Young ParkAbstractThis study investigated the effects of dielectric barrier discharge (DBD) plasma against Staphylococcus aureus and Bacillus cereus (initial inoculum of 8-9 log10CFU/mL) on the surface of dried blackmouth angler, and the physicochemical [pH, Hunter colors, thiobarbituric acid reactive...
Sun, 02/02/2020 - 03:30
Durum wheat (Triticum durum Desf.) has potential as an adjunct in brewing given its agronomic, chemical and technological properties. The aim of this work were to identify the cultivable microflora and evaluate the technological quality of the durum wheat variety ‘Senatore Cappelli’ grown and used by a craft brewery in Sardinia, Italy. The isolated bacterial strains were mainly rhizospheric (...
Fri, 01/31/2020 - 03:29
Salmonella enterica, Listeria monocytogenes, Shigella flexneri, Escherichia coli O157:H7, Vibrio parahaemolyticus, Staphylococcus aureus, Vibrio cholerae, Clostridium botulinum type A, Bacillus cereus, Clostridium perfringens Alpha toxin, and Yersinia enterocolitica are 11 common foodborne pathogens. Traditional bacterial culture methods for detecting pathogens are time‐consuming and labor‐...
Fri, 01/31/2020 - 03:25
Staphylococcus aureus is one of the major pathogens causing mastitis in dairy herds. The colonization of dairy cows and subsequent contamination of raw milk by S. aureus, especially strains exhibiting multidrug resistance and biofilm-forming and toxin-producing abilities, remains an important issue for both dairy farmers and public health. In this study, we investigated the prevalence,...
Fri, 01/31/2020 - 03:25
Staphylococcus aureus is recognized worldwide as one of the main contagious mastitis agents in cattle and can express a set of antimicrobial resistance genes and virulence-associated genes that explain the wide range of outcomes of intramammary infections. Staphylococcus aureus strains are heterogeneous: their different resistance and virulence patterns, associated with host-level factors and...
Thu, 01/30/2020 - 03:29
Arabic gum has an interesting antioxidant and antimicrobial properties. Arabic gum can be used as a natural emulsifier and egg substitution in vegan mayonnaise. The manufacture of mayonnaise with Arabic gum was useful in controlling the development of rancidity. Abstract The main factors affecting the spoilage of mayonnaise are lipid oxidation and microbial contamination. Therefore, the...
Thu, 01/30/2020 - 03:25
Epigenetic agents, histone deacetylase inhibitor (SAHA) and DNA methyltransferase inhibitor (5-Aza), were added to Czapek-Dox medium to trigger the chemical diversity of marine-derived fungus Aspergillus versicolor XS-20090066. By HPLC and 1H NMR analysis, the diversity of fungal secondary metabolites was significantly increased compared with the control. With the aid of MS/MS-based molecular...
Thu, 01/30/2020 - 03:25
Panton-Valentine leukocidin (luk-pv) is a cytotoxin that causes leukocyte destruction and tissue necrosis. The aim of this study was to determine the prevalence of the pv1, mecA, and nuc genes in Staphylococcus aureus isolates obtained from anterior nares and superficial infection sites of skin in a slum population of West Bengal, India. Expression level of pv1 gene was also analysed. Twenty-two...
Wed, 01/29/2020 - 04:01
Author(s): Nguyen Nhat Minh Phuong, Thien Trung Le, John Van Camp, Katleen RaesAbstractMicrobial safety in food products is not always adequately controlled. Chemical antimicrobials which are recognized as hazards to human health are gradually replaced by natural antimicrobial compounds. In the current study, the antimicrobial activity against some Gram-positive and Gram- negative bacteria by the...
Tue, 01/28/2020 - 03:29
Food poisoning risk related to the consumption of contaminated food with known foodborne pathogens or antibiotic‐resistant bacteria is currently a serious threat for public health. Thus, pathogenic Methicillin‐resistant Staphylococcus strains are considered as one of the major cause of food‐borne diseases in hospitals. The present study aims to determine the prevalence and the antibiotic...
Tue, 01/28/2020 - 03:29
Industrial aerobic fermentation of natural black olives. Summary The fermentation of natural black olives is currently carried out under anaerobic conditions. This work investigates the aerobic fermentation of this product in tanks containing 16 000 kg of Empeltre olives during two seasons. The microorganisms in brines were yeasts in all cases, whereas lactic acid bacteria growth was only...
Sun, 01/26/2020 - 03:34
Author(s): Mahmoud Ge. Zayda, Yoshimitsu Masuda, Ahmed M. Hammad, Ken-ichi Honjoh, Abdelrahman M. Elbagory, Takahisa MiyamotoAbstractWe investigated the characteristics of S. aureus isolates causing bovine subclinical mastitis (SCM), and their genetic relatedness with the isolates obtained from Egyptian cheese. Twenty-five S. aureus isolates were identified from 150 SCM milk and 75 cheese samples...
Sun, 01/26/2020 - 03:33
Author(s): Sara Ceballos, Carmen Aspiroz, Laura Ruiz-Ripa, Myriam Zarazaga, Carmen Torres, Spanish study group on clinical LA-MRSAAbstractLivestock-associated (LA) methicillin-resistant Staphyloccoccus aureus (MRSA) of lineage CC398 is an emerging clone causing human infections, although they are most commonly found in pigs. The aim of this study was to characterize the antimicrobial resistance...
Sun, 01/26/2020 - 03:33
Author(s): Johannes Hamel, Yanchao Zhang, Nicole Wente, Volker KrömkerAbstractNon-S. aureus staphylococci (NAS) are the most frequently isolated pathogens from bovine milk and can cause intramammary infections (IMI). They can also be found in teat canals, on bovine skin and in cows’ environment, which may lead to unnoticed contamination of milk samples. The aim of this study was to investigate...
Sun, 01/26/2020 - 03:32
Author(s): Kyle Ganz, Etsuko Yamamoto, Kate Hardie, Christine Hum, Hussein Hussein, Annie Locas, Marina SteeleAbstractA profile of the microbial safety of cheese in Canada was established based on the analysis of 2955 pasteurized and raw-milk cheeses tested under Canada's National Microbiological Monitoring Program (NMMP) and 2009 raw-milk cheeses tested under the Targeted Survey Program. 97.8%...
Sat, 01/25/2020 - 03:24
Rats are a reservoir of human- and livestock-associated methicillin-resistant Staphylococcus aureus (MRSA). However, the composition of the natural S. aureus population in wild and laboratory rats is largely unknown. Here, 144 nasal S. aureus isolates from free-living wild rats, captive wild rats and laboratory rats were genotyped and profiled for antibiotic resistances and human-specific...
Fri, 01/24/2020 - 03:35
by Sarah Ben Maamar, Adam J. Glawe, Taylor K. Brown, Nancy Hellgeth, Jinglin Hu, Ji-Ping Wang, Curtis Huttenhower, Erica M. Hartmann The decades-long global trend of urbanization has led to a population that spends increasing amounts of time indoors. Exposure to microbes in buildings, and specifically in dust, is thus also increasing, and has been linked to various health outcomes and to...
Fri, 01/24/2020 - 03:33
Author(s): Gülden Göksen, Maria José Fabra, H. Ibrahim Ekiz, Amparo López-RubioAbstractThe aim of this work was to develop novel active edible electrospun coatings with antimicrobial properties through the encapsulation of essential oils (EOs) from two widely used spices (Laurus nobilis and Rosmarinus officinalis) for inactivating or reducing spoilage and pathogenic microorganisms. Firstly, EOs...
Fri, 01/24/2020 - 03:24
Increased prevalence of antibiotic resistance in skin and soft tissue infections is a concerning public health challenge currently facing medical science. A combinatory, broad spectrum biocidal antiseptic has been developed (“ASP”) as a topically applied solution to potential resistant and polymicrobial infected wounds that may be encountered in this context. The ASP-105 designate was evaluated...
Fri, 01/24/2020 - 03:24
Staphylococcus aureus is an important pathogen that is associated with nosocomial infections, as well as food poisoning. This bacterium is resistant to antimicrobial agents and can survive in a wide range of environmental conditions. The aim of this study was to measure the uptake and release of amino acids by S. aureus at mid-exponential and stationary phases of growth following exposure to a...
Thu, 01/23/2020 - 03:31
Author(s): Hao Cheng, Muhammad Aslam Khan, Zhenfeng Xie, Shengnan Tao, Yunxing Li, Li LiangAbstractThe combination of different antimicrobial agents might produce synergistic effects and has gained increasing interest. Interfacial engineering of emulsion systems has been developed to co-encapsulate and protect bioactive components with different solubility. In this study, peppermint oil and...
Thu, 01/23/2020 - 03:31
Author(s): Liping Zhou, Tingwei Xu, Jicheng Yan, Xin Li, Yuqing Xie, Hao ChenAbstractThe konjac glucomannan (hereafter referred to simply as konjac) hydrogel has favorable gel-forming ability and swelling capacity, but the insufficient flexibility and poor water retention have limited its utilization. In this study, composite gels based on konjac and fish gelatin (FG) were prepared by alkali...

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