Salmonella

Thu, 01/21/2021 - 16:00
Salmonella spp. is a leading cause of gastrointestinal enteritis in humans where it is largely contracted via contaminated poultry and pork. Phages can be used to control Salmonella infection in the animals, which could break the cycle of infection before the products are accessible for consumption. Here, the potential of 21 myoviruses and a siphovirus to eliminate Salmonella in vitro and in vivo...
Thu, 01/21/2021 - 10:03
The bacterial cell wall plays a key role in viability and is an important drug target. The cell wall is made of elongated polymers that are cross-linked to one another to form a load-bearing mesh. An alternative cell wall cross-linking mechanism used by the l,d-transpeptidase YcbB has been implicated in the stress-regulated roles of β-lactam resistance, outer membrane defect rescue, and...
Thu, 01/21/2021 - 06:14
Author(s): Thuan Khanh Nguyen, Hien Thi Bui, Thy Anh Truong, Diep Ngoc Lam, Shunsuke Ikeuchi, Lien Khai Thi Ly, Yukiko Hara-Kudo, Takahide Taniguchi, Hideki Hayashidani
Thu, 01/21/2021 - 02:02
The essential oil (EO) from the roots of Plectranthus barbatus Andr. (Syn. Coleus forskohlii Briq.) was evaluated for quorum sensing (QS) inhibitory activity. P. barbatus EO was screened for inhibition of QS regulated violacein production in Chromobacterium violaceum (ATCC 12472) wild-type strain. At inhibitory (6.25% v/v) and sub-inhibitory concentrations (3.125% v/v) of the EO, dose-dependent...
Thu, 01/21/2021 - 00:00
Antimicrobial resistance is a global public health concern, and resistance genes in Salmonella, especially those located on mobile genetic elements, are part of the problem. This study used phenotypic and genomic methods to identify antimicrobial resistance and resistance genes, as well as the plasmids that bear them, in Salmonella isolates obtained from poultry in Nigeria. Seventy-four isolates...
Wed, 01/20/2021 - 22:13
Dates are a low moisture ready‐to‐eat fruit which are popular both globally and in the United States. The harvesting and post‐harvest handling of dates could result in the contamination of common produce‐associated foodborne pathogens including E. coli O157:H7, Listeria monocytogenes, and Salmonella spp. In this study, the efficacy of antimicrobial washes for the reduction of foodborne pathogen...
Wed, 01/20/2021 - 16:00
Salmonella enterica remains a leading cause of food-borne diseases worldwide. Serotype information is important in food safety and public health activities to reduce the burden of salmonellosis. In the current st...
Wed, 01/20/2021 - 10:02
Yersinia pestis is a highly virulent pathogen and the causative agent of bubonic, septicemic, and pneumonic plague. Primary pneumonic plague caused by inhalation of respiratory droplets contaminated with Y. pestis is nearly 100% lethal within 4 to 7 days without antibiotic intervention. Pneumonic plague progresses in two phases, beginning with extensive bacterial replication in the lung with...
Wed, 01/20/2021 - 10:02
The stringent response is an essential mechanism of metabolic reprogramming during environmental stress that is mediated by the nucleotide alarmones guanosine tetraphosphate and pentaphosphate [(p)ppGpp]. In addition to physiological adaptations, (p)ppGpp also regulates virulence programs in pathogenic bacteria, including Salmonella enterica serovar Typhimurium. S. Typhimurium is a common cause...
Wed, 01/20/2021 - 04:02
Wine and alcoholic apple cider are commonly back-sweetened with unpasteurized juice to produce fresh, natural, and palatable sweetened alcoholic beverages. Foodborne pathogens may be introduced from unpasteurized juice into alcoholic beverages through this back-sweetening process. Although pathogens generally do not survive under low pH conditions or high alcohol environment, the die-off of these...
Wed, 01/20/2021 - 04:02
Flies are a vector for spreading foodborne pathogens pertinent to fresh produce, such as Shiga-toxigenic Escherichia coli and Salmonella; however, most studies focus on concentrated animal feeding operations, which do not reflect low-density animal farming practices that often adjoin fruit and vegetable acreage.  In this study, we determined the prevalence of Salmonella in flies collected...
Tue, 01/19/2021 - 10:03
Pyridoxal 5'-phosphate (PLP) is the biologically active form of vitamin B6, essential for cellular function in all domains of life. In many organisms, such as Salmonella enterica serovar Typhimurium and Escherichia coli, this cofactor can be synthesized de novo or salvaged from B6 vitamers in the environment. Unexpectedly, S. enterica strains blocked in PLP biosynthesis were able to use exogenous...
Tue, 01/19/2021 - 10:03
Salmonella spp. are resilient bacterial pathogens in low-moisture foods. There has been a general lack of understanding of critical factors contributing to the enhanced thermal tolerance of Salmonella spp. in dry environments. In this study, we hypothesized that the moisture content (XW) of bacterial cells is a critical intrinsic factor influencing the resistance of Salmonella spp. to thermal...
Tue, 01/19/2021 - 10:03
Despite recent advances in Salmonella-sprout research, little is known about the relationship between Salmonella and the sprout microbiome during sprouting. Sprout spent irrigation water (SSIW) provides an informative representation of the total microbiome of this primarily aquaponic crop. This study was designed to characterize the function and taxonomy of the most actively transcribed genes in...
Tue, 01/19/2021 - 06:12
Author(s): H. Zeng, K. De Reu, S. Gabriël, W. Mattheus, L. De Zutter, G. Rasschaert
Thu, 01/14/2021 - 06:19
Author(s): Mario González-Angulo, Vinicio Serment-Moreno, Laura Clemente-García, Carole Tonello, Isabel Jaime, Jordi Rovira Despite the commercial success of high pressure processing (HPP) in the juice industry, some regulatory agencies still require process validation. However, there is a lack of consensus on various aspects regarding validation protocols, including the selection of...
Wed, 01/13/2021 - 16:00
Foodborne illness caused by consumption of food contaminated with Salmonella is one of the most common causes of diarrheal disease and affects millions of people worldwide. The rising emergence and spread of antimicrobial resistance, especially in some serotypes of Salmonella, has raised a great awareness of public health issues worldwide. To ensure safety of the food processing chain, the...
Wed, 01/13/2021 - 10:03
ABSTRACT Salmonella enterica serotype Kentucky is frequently associated with high-level fluoroquinolone resistance and has gained epidemiological importance globally. A retrospective screening was performed to understand the national prevalence of ciprofloxacin-resistant S. Kentucky in China. S. enterica strains (n = 15,405) were collected within the frame of two national surveillance networks...
Wed, 01/13/2021 - 06:10
Author(s): Andrea R. McWhorter, Samiullah Khan, Margaret Sexton, Talia S. Moyle, Kapil K. Chousalkar Despite food safety recommendations, raw egg-based foods, such as mayonnaise, are frequently identified as the source of Salmonella during outbreaks. Acidification and storage temperature have been linked with reduced bacterial culturability. Raw egg-based sauces stored at 25°C have historically...
Wed, 01/13/2021 - 02:02
Deoxynivalenol (DON) is a widely distributed mycotoxin that frequently occurs in various foodstuffs, and poses a health risk to human and animals. Biodegradation of DON to less- or non-toxic substances using naturally existing microorganisms is considered the best approach for DON detoxification. Although various microorganisms capable of detoxifying DON have been reported; however, such studies...
Tue, 01/12/2021 - 22:14
The objective of this survey was to estimate the prevalence, contamination level, and genetic diversity of Salmonella in selected raw, shelled tree nuts (Brazil nuts, cashews, hazelnuts, macadamia nuts, pecans, pine nuts, pistachios, and walnuts) at retail markets in the United States. A total of 3,374 samples of eight tree nuts were collected from different types of retail stores and markets...
Tue, 01/12/2021 - 06:15
Author(s): Zhengquan Chen, Jie Bai, Xibin Zhang, Shaojun Wang, Kaifeng Chen, Qijie Lin, Chenggang Xu, Xiaoyun Qu, Hongxia Zhang, Ming Liao, Jianmin Zhang This study was undertaken to investigate the prevalence, serotype distribution and antimicrobial resistance in Salmonella isolated from retail meat in Southern China, and to characterize the major mechanisms that mediate the ciprofloxacin...
Tue, 01/12/2021 - 04:02
Salmonella  has been linked to many food-borne illnesses and epidemics in both humans and animals. This cross-sectional study determined the prevalence, serovars and factors associated with Salmonella contamination of chickens slaughtered in outlets of the informal markets in Gauteng Province, South Africa. A total of 151 chicken carcasses were randomly collected from 47 outlets. Standard...
Tue, 01/12/2021 - 04:02
Salad vegetables purchased from farmers’ markets and grocery stores in central Ohio during the summers of 2015 and 2016 were tested for the presence of Enterobacteriaceae resistant to extended spectrum cephalosporins and carbapenems, Salmonella contamination, and coliform bacteria count. A total of 364 samples were collected from 36 farmers’ markets and 33 grocery stores. Using selective media we...
Mon, 01/11/2021 - 22:13
Disk diffusion method to determine antimicrobial activity of plant essential oils was used. While the essential oil extracted from oregano has a high effect on 9 of our test microorganisms (75%), one of them had a medium effect and two of them had a weak effect in the test results. While the essential oil obtained from thyme was effective on VRE, MSSA, Escherichia feacalis and Staphylococcus...
Mon, 01/11/2021 - 16:00
The lesser-known traditionally processed meat products such as beef kargyong, pork kargyong, satchu, and khyopeh are popular food items in the Himalayan state of Sikkim in India. The present study aimed to assess the microbiological safety of traditional meat products by identifying the potential spoilage or pathogenic bacteria, detecting the enterotoxins, and screening the antibiotic...
Mon, 01/11/2021 - 06:09
Author(s): Jing Zhuang, Xiaoyue Ji, Yue Zhu, Wei Liu, Jing Sun, Xinan Jiao, Xiulong Xu Autophagy plays an important role in restricting the growth of invading intracellular microbes. Salmonella (S) Typhimurium, an intracellular pathogen that causes gastroenteritis and food poisoning in humans, evades autophagic detection by multiple mechanisms. There has been growing interest in developing...
Sun, 01/10/2021 - 22:09
BACKGROUND Fermentation, a traditional food preserving technique and an effective process, widely used to enrich the nutrients diversity and bioactivity of the fermented foods since ancient times. This study aimed at investigating the effects of various fermentation starters on the physicochemical, antioxidant, antimicrobial, and antidiabetic properties of the blueberry juices. The blueberry...
Sun, 01/10/2021 - 06:10
Author(s): Renata Galetti, Rafael Antonio Casarin Penha Filho, Joseane Cristina Ferreira, Alessandro M. Varani, Pavelas Sazinas, Lars Jelsbak, Ana Lúcia Costa Darini The rapid emergence of resistant bacteria is occurring worldwide. The understanding of the dissemination of antimicrobial resistance using high-throughput sequencing and bioinformatics approaches is providing valuable insights into...
Sat, 01/09/2021 - 12:01
ABSTRACT Biofilm is a predominant lifestyle of bacteria that comprises of cells as collectives enmeshed in a polymeric matrix. Biofilm formation is vital for bacterial species as it provides access to nutrients and protects the cells from environmental stresses. Here we show that interference in biofilm matrix production is a strategy by the competing bacterial species to reduce the ability of...
Fri, 01/08/2021 - 16:00
The açai palm (Euterpe oleracea) is native to the Amazon basin, a humid tropical forest. High levels of total mesophilic bacteria with high diversity have been consistently reported in açai fruits. As local consumers have few digestive problems, the results of the present study reveal the lactic acid bacteria (LAB) recovered from açai fruits with characteristics that suggest they are possible...
Fri, 01/08/2021 - 06:07
Author(s): Zhang Jian, Wei Luo, Guifeng Liu, Yang Wang, Shizhong Geng, Zhiming Pan, Xin’an Jiao Salmonella Enteritidis (SE) is important zoonotic pathogens, it can be easily transferred to human by contaminated animal products. It is necessary for epidemic surveys of SE in current modern large-scale chicken farms. And so in this study, Salmonella strains were isolated from suspected samples being...
Fri, 01/08/2021 - 04:02
Refugee camps provide basic necessities such as food, water, shelter, and medical treatment for displaced persons. Unsanitary conditions in refugee camps due to overcrowding, poor sanitation systems, lack of clean water, minimal ways to cook and store food can lead to an increased risk of foodborne illness. This article reviews the limited literature on the epidemiology of foodborne illness in...
Fri, 01/08/2021 - 04:02
Salmonella enterica has been increasingly linked to outbreaks involving consumption of fresh produce. While several studies have identified genes whose products are involved in mediating S. enterica -plant interactions, the use of varying experimental approaches, serovars and plant types have generated variable and conflicting data. The purpose of this study was to determine whether conditions...
Thu, 01/07/2021 - 22:14
Animal petting zoos and farm fairs provide the opportunity for children and adults to interact with animals, but contact with animals carries a risk of exposure to zoonotic pathogens and antimicrobial‐resistant bacteria. The aim of this study was to assess the occurrence of Shiga toxin‐producing Escherichia coli (STEC), Salmonella, extended‐spectrum β‐lactamase (ESBL)‐producing Enterobacteriaceae...
Thu, 01/07/2021 - 10:05
ABSTRACT Salmonella enterica encodes a wide array of virulence factors. One novel virulence factor, an A2B5 toxin known as the typhoid toxin (TT), was recently identified among a variety of S. enterica serovars. While past studies have shown that some serovars encode both the TT (active subunits CdtB and PltA and binding subunit PltB) and a second binding subunit (ArtB), these serovars were...
Thu, 01/07/2021 - 10:05
Salmonella enterica serovar Livingstone 1236H was isolated originally from peanut butter and represents a health risk in low-moisture foods. The current work presents the strain’s genome sequencing results, which show a 4,824,729-bp genome sequence and 4,435 protein coding sequences, including some that are involved in adaptation to low-moisture environments.
Thu, 01/07/2021 - 10:05
Here, we report the complete genome sequences for 36 Canadian isolates of Salmonella enterica subsp. enterica serovar Typhimurium and its monophasic variant I 1,4,[5]:12:i:– from both clinical and animal sources. These genome sequences will provide useful references for understanding the genetic variation within this prominent serotype.
Wed, 01/06/2021 - 10:02
ABSTRACT Pullorum disease is one of the most common diarrhea-related diseases caused by Salmonella enterica subspecies enterica serovar Gallinarum biovar Pullorum (S. Pullorum); it negatively affects the poultry industry. However, limited studies have explored the association between the gut microbiota and S. Pullorum infection in chickens. In the present study, we performed a microbiome...
Wed, 01/06/2021 - 06:09
Author(s): Xin Wang, Yiluo Cheng, Wenting Zhang, Qin Lu, Guoyuan Wen, Qingping Luo, Huabin Shao, Zishu Pan, Tengfei Zhang Salmonella Pullorum is a pathogen specific to birds that can cause Pullorum disease in young chickens and lead to considerable economic losses in the poultry industry. During transmission and infection, S. Pullorum will encounter various environmental stresses and host...
Wed, 01/06/2021 - 06:08
Author(s): Xin Yin, Nkuchia M. M’ikanatha, Epiphanie Nyirabahizi, Patrick F. McDermott, Heather Tate Antimicrobial resistance (AMR) in non-typhoidal Salmonella from poultry is a public health concern. Injudicious use of antibiotics in humans and agriculture fuels the emergence of resistance. The objective of this study is to characterize the prevalence, antibiotic susceptibility profiles and...
Wed, 01/06/2021 - 06:08
Author(s): Tania Veltman, David Jordan, Christopher A. McDevitt, Jan Bell, Benjamin P. Howden, Mary Valcanis, Mark O’Dea, Sam Abraham, Peter Scott, Jessica H. Kovac, Raymond Chia, Barry Combs, Kapil Chousalkar, Timothy Wilson, Darren J. Trott The development of antimicrobial resistance in foodborne pathogens is a growing public health concern. This study was undertaken to determine the...
Wed, 01/06/2021 - 02:03
The study evaluates the effect of Artemisia dracunculus essential oil (EO) on two pathogenic bacteria Salmonella enterica serovar Typhimurium and Staphylococcus aureus and Vero cell line. To evaluating the anti-biofilm potential of the EO, a microtiter-plate test (MtP) and scanning electron microscopy (SEM) were performed. The quorum-sensing inhibitory properties were examined by QS-related gene...
Tue, 01/05/2021 - 10:03
ABSTRACT Small proteins are gaining increased attention due to their important functions in major biological processes throughout the domains of life. However, their small size and low sequence conservation make them difficult to identify. It is therefore not surprising that enterobacterial ryfA has escaped identification as a small protein coding gene for nearly 2 decades. Since its...
Tue, 01/05/2021 - 10:03
ABSTRACT Salmonella enterica serovar Typhimurium is an intracellular pathogen that elicits nitric oxide (NO·) production by host macrophages. NO· is a potent antimicrobial mediator with diverse targets, including protein thiols and metal centers. The mobilization of zinc from metalloproteins by NO· increases the availability of free intracellular zinc, which is detrimental to...
Tue, 01/05/2021 - 10:02
The initial steps of Salmonella pathogenesis involve adhesion to and invasion into host epithelial cells. While well-studied for Salmonella enterica serovar Typhimurium, the factors contributing to this process in other, host-adapted serovars remains unexplored. Here, we screened clinical isolates of serovars Gallinarum, Dublin, Choleraesuis, Typhimurium, and Enteritidis for adhesion to and...
Mon, 01/04/2021 - 22:13
This present work shows the potential of dimethyl dicarbonate (DMDC) as a promising approach to ensure quality and safety of coconut water in term of microbial inactivation and minimal changes in quality parameters during cold storage (4 °C). Pathogenic strains including Escherichia coli, Staphylococcus aureus, Salmonella Enteritidis and Listeria monocytogenes were selected for evaluation of...

Pages