Publications
| Title | Abstract | Year(sorted ascending) Filter | PMID Filter |
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| inefficient translocation of a truncated o unit by a salmonella wzx affects both o-antigen production and cell growth. | bacterial wzx flippases translocate (flip) short oligosaccharide repeat units (o units) across the inner membrane into the periplasm, which is a critical step in the assembly of many o antigens, capsules and other surface polysaccharides. there is enormous diversity in o antigens and capsules in particular, even within species. wzx proteins are similarly diverse, but it has been widely accepted that they have significant specificity only for the first sugar of an o unit. in this study, we analys ... | 2015 | 25837817 |
| survival of salmonella on chamomile, peppermint, and green tea during storage and subsequent survival or growth following tea brewing. | the survival of salmonella on dried chamomile flowers, peppermint leaves, and green tea leaves stored under different conditions was examined. survival and growth of salmonella was also assessed after subsequent brewing using dried inoculated teas. a salmonella enterica serovar cocktail was inoculated onto different dried tea leaves or flowers to give starting populations of approximately 10 log cfu/g. the inoculum was allowed to dry (at ambient temperature for 24 h) onto the dried leaves or flo ... | 2015 | 25836389 |
| oral administration of the salmonella typhimurium vaccine strain nal2/rif9/rtt to laying hens at day of hatch reduces shedding and caecal colonization of salmonella 4,12:i:-, the monophasic variant of salmonella typhimurium. | a new monophasic variant of salmonella typhimurium, salmonella enterica serotype 4,12:i:-, is rapidly emerging. this serotype is now considered to be among the 10 most common serovars isolated from humans in many countries in europe and in the united states. the public health risk posed by these emerging monophasic salmonella typhimurium strains is considered comparable to that of classical salmonella typhimurium strains. the serotype 4,12:i:- is frequently isolated from pigs but also poultry ar ... | 2015 | 25825785 |
| metal tolerance in emerging clinically relevant multidrug-resistant salmonella enterica serotype 4,[5],12:i:- clones circulating in europe. | the occurrence of acquired metal tolerance genes in emerging mdr salmonella enterica serotype 4,[5],12:i:- clones was assessed and their associated platforms and tolerance phenotype were characterised. salmonella 4,[5],12:i:- from different sources belonging to european, spanish and southern european clones were studied. screening for copper (pcoa-pcod/tcrb), silver/copper (sila-sile), mercury (mera), arsenic (arsb) and tellurite (terf) tolerance genes was performed by pcr/sequencing. cuso(4)/ag ... | 2015 | 25816978 |
| early onset neonatal sepsis due to salmonella enterica serovar 4,5,12:i:-: a case report with literature review. | the authors report a case of a 36-week male infant born via spontaneous vaginal delivery who developed salmonella sepsis at hrh princess maha chakri sirindhorn medical center srinakharinwirot university, nakhon nayok, thailand. he was born to a mother without identifiable risk factors. on day 3, he developed fever tachycardia, lethargy, poor feeding and diarrhea prompting a sepsis evaluation. blood and stool cultures were positive for s. enterica serovar 4,5,12:i:-. therefore, salmonella infecti ... | 2015 | 27276847 |
| contribution to virulence of a novel anti-inflammatory effector in salmonella enterica. | 2015 | 27437422 | |
| [fluorescent and magnetic relaxation switch immunosensor for the detecting foodborne pathogen salmonella enterica in water samples]. | fluoroimmunoassay based on quantum dots (qds) and magnetic relaxation switch (mrs) immunoassay based on superparamagnetic nanoparticles (smn) were constructed to detect salmonella enterica (s. enterica) in water samples. in fluoroimmunoassay, magnetic beads was conjugated with s. enterica capture antibody (mb-ab2) to enrich s. enterica from sample solution, then the qds was conjugated with the s. enterica detection antibody (qds-ab1) to detect s. enterica based on sandwich immunoassay format. an ... | 2015 | 26978918 |
| prevalence and epidemiology of salmonella enterica serovar gallinarum from poultry in some parts of haryana, india. | the present study was investigated to ascertain the epidemiological status of fowl typhoid (ft) in broilers in some parts of haryana during january 2011 to december 2013. | 2015 | 27047033 |
| convergent synthesis of oligosaccharide fragments corresponding to the cell wall o-polysaccharide of salmonella enterica o53. | conventional glycoconjugate vaccines are prepared with polysaccharides isolated from bacterial fermentation, an approach with some significant drawbacks such as handling of live bacterial strains, the presence of biological impurities, and inter-batch variations in oligosaccharide epitope structure. however, it has been shown in many cases that a synthetic fragment of appropriate structure conjugated to a protein can be an effective vaccine that circumvents the shortcomings of using full-length ... | 2015 | 27308202 |
| antimicrobial resistance of enteric salmonella in bangui, central african republic. | introduction. the number of salmonella isolated from clinical samples that are resistant to multiple antibiotics has increased worldwide. the aim of this study was to determine the prevalence of resistant salmonella enterica isolated in bangui. methods. all enteric salmonella strains isolated from patients in 2008 were identified and serotyped, and the phenotypes of resistance were determined by using the disk diffusion method. nine resistance-associated genes, bla tem , bla oxa , bla shv , teta ... | 2015 | 26880999 |
| dissemination of salmonella enterica sequence types among asean economic community countries. | food-borne illness caused by salmonella enterica remains a public health problem and results in economic loss worldwide. with the up-coming establish- ment of the asean economic community (aec) allowing unrestricted move- ment of labor and goods, there is a higher risk of pathogen transmission among the aec countries. this study characterized and investigated the spatial and temporal associations of s. enterica strains isolated in aec countries during 1940- 2012 compared with those isolated in n ... | 2015 | 26867391 |
| high prevalence of typhoidal salmonella enterica serovars excreting food handlers in karachi-pakistan: a probable factor for regional typhoid endemicity. | typhoid fever is the persistent cause of morbidity worldwide. salmonella enterica serovar's carriers among food handlers have the potential to disseminate this infection on large scale in the community. the purpose of this study was to determine the prevalence of typhoidal s. enterica serovars among food handlers of karachi. | 2015 | 26825058 |
| selection and electrophoretic characterization of salmonella enterica subsp. enterica biocide variants resistant to antibiotics. | the proposed research outlines a serious common concern of salmonella resistance to antimicrobials following prolonged exposure to the disinfectants (biocides). these phenotypes of bacteria could potentially result in hard to treat infections. typical for avian sources, biocide sensitive s. enterica subsp. enterica serovars: typhimurium, enteritidis, virchow and zanzibar and their isogenic biocide-tolerant variants were studied in order to investigate bacteriostatic effect of two commercially av ... | 2015 | 26812813 |
| comparative evaluation of the mutagenicity and genotoxicity of smoke condensate derived from korean cigarettes. | cigarette smoking is associated with carcinogenesis owing to the mutagenic and genotoxic effects of cigarette smoke. the aim of this study was to evaluate the mutagenic and genotoxic effects of korean cigarettes using in vitro assays. | 2015 | 26796893 |
| massive gastrointestinal hemorrhage secondary to typhoid colitis: a case report and literature review. | we present a case of massive lower gastrointestinal hemorrhage secondary to salmonella enterica subtype typhi (s. typhi) colitis, in a 29 year-old female treated for s. typhi bacteremia. one week post-treatment, she unexpectedly developed a large volume of rectal bleeding. endoscopy showed colonic ulcers and ileitis, but no endoscopic hemostasis was required. treatment was supportive with transfusions and a prolonged course of antimicrobials, with the bleeding stopping spontaneously. this case i ... | 2015 | 26793465 |
| salmonella enterica typhimurium fljba operon stability: implications regarding the origin of salmonella enterica i 4,[5],12:i:. | salmonella enterica subsp enterica serovar 4,5,12:i:- has been responsible for many recent salmonella outbreaks worldwide. several studies indicate that this serovar originated from s. enterica subsp enterica serovar typhimurium, by the loss of the flagellar phase ii gene (fljb) and adjacent sequences. however, at least two different clones of s. enterica 4,5,12:i:- exist that differs in the molecular events responsible for fljb deletion. the aim of this study was to test the stability of the fl ... | 2015 | 26782556 |
| emergence of a clonal lineage of multidrug-resistant esbl-producing salmonella infantis transmitted from broilers and broiler meat to humans in italy between 2011 and 2014. | we report the spread of a clone of multidrug-resistant (mdr), esbl-producing (blactx-m-1) salmonella enterica subsp. enterica serovar infantis, in the italian broiler chicken industry and along the food-chain. this was first detected in italy in 2011 and led to human infection in italy in 2013-2014.a set (n = 49) of extended-spectrum cephalosporin (esc)-resistant (r) isolates of s. infantis (2011-2014) from humans, food-producing animals and meat thereof, were studied along with a selected set o ... | 2015 | 26716443 |
| complex regulation of the sirtuin-dependent reversible lysine acetylation system of salmonella enterica. | the extensive involvement of the reversible lysine acylation (rla) system in metabolism has attracted the attention of investigators interested in understanding the fundamentals of prokaryotic and eukaryotic cell function. research in this area of cell physiology is diverse, ranging from probing the molecular bases of human diseases, to optimizing engineered metabolic pathways for biotechnological applications, to advancing our understanding of fundamental cellular processes, among others. a gap ... | 2015 | 26705535 |
| salmonella enterica infections in the united states and assessment of coefficients of variation: a novel approach to identify epidemiologic characteristics of individual serotypes, 1996-2011. | despite control efforts, salmonellosis continues to cause an estimated 1.2 million infections in the united states (us) annually. we describe the incidence of salmonellosis in the us and introduce a novel approach to examine the epidemiologic similarities and differences of individual serotypes. | 2015 | 26701276 |
| putative alternative polyadenylation (apa) events in the early interaction of salmonella enterica typhimurium and human host cells. | the immune response of epithelial cells upon infection is mediated by changing activity levels of a variety of proteins along with changes in mrna, and also ncrna abundance. alternative polyadenylation (apa) represents a mechanism that diversifies gene expression similar to alternative splicing. t-cell activation, neuronal activity, development and several human diseases including viral infections involve apa, but at present it remains unclear if this mechanism is also implicated in the response ... | 2015 | 26697380 |
| spatial-temporal epidemiology of human salmonella enteritidis infections with major phage types (pts 1, 4, 5b, 8, 13, and 13a) in ontario, canada, 2008-2009. | in ontario and canada, the incidence of human salmonella enterica serotype enteritidis (s. enteritidis) infections have increased steadily during the last decade. our study evaluated the spatial and temporal epidemiology of the major phage types (pts) of s. enteritidis infections to aid public health practitioners design effective prevention and control programs. | 2015 | 26673616 |
| salmonella enterica serovars enteritidis infection alters the indigenous microbiota diversity in young layer chicks. | avian gastrointestinal (gi) tracts are highly populated with a diverse array of microorganisms that share a symbiotic relationship with their hosts and contribute to the overall health and disease state of the intestinal tract. the microbiome of the young chick is easily prone to alteration in its composition by both exogenous and endogenous factors, especially during the early posthatch period. the genetic background of the host and exposure to pathogens can impact the diversity of the microbia ... | 2015 | 26664988 |
| infection of murine macrophages by salmonella enterica serovar heidelberg blocks murine norovirus infectivity and virus-induced apoptosis. | gastroenteritis caused by bacterial and viral pathogens constitutes a major public health threat in the united states accounting for 35% of hospitalizations. in particular, salmonella enterica and noroviruses cause the majority of gastroenteritis infections, with emergence of sporadic outbreaks and incidence of increased infections. although mechanisms underlying infections by these pathogens have been individually studied, little is known about the mechanisms regulating co-infection by these pa ... | 2015 | 26658916 |
| multiplex pcr for diagnosis of salmonella enterica serovar typhi. | typhoid fever caused by salmonella enterica serovar typhi is endemic in developing countries. its detection by culturing on specific media or serological methods like the widal test is time consuming and/or less sensitive than the pcr technique. here we apply a multiplex pcr dependent detection for s. typhi using two specific primers for inva and flic genes. | 2015 | 26642717 |
| mechanism of na(+)-dependent citrate transport from the structure of an asymmetrical cits dimer. | the common human pathogen salmonella enterica takes up citrate as a nutrient via the sodium symporter secits. uniquely, our 2.5 å x-ray structure of the secits dimer shows three different conformations of the active protomer. one protomer is in the outside-facing state. two are in different inside-facing states. all three states resolve the substrates in their respective binding environments. together with comprehensive functional studies on reconstituted proteoliposomes, the structures explain ... | 2015 | 26636752 |
| indolent non-typhoidal salmonella vertebral osteomyelitis in a diabetic patient. | we herein describe the case of a 59-year-old japanese man with diabetes mellitus who presented with vertebral osteomyelitis caused by salmonella enterica subspecies enterica serovar enteritidis. the patient presented with a persistent fever without back pain. extraintestinal infections of salmonella species are well known and are often reported in immunocompromised patients; however, they are rare in non-immunosuppressed patients. the protracted course and atypical presentation of osteomyelitis ... | 2015 | 26631898 |
| validation of single and pooled manure drag swabs for the detection of salmonella serovar enteritidis in commercial poultry houses. | single swabs (cultured individually) are currently used in the food and drug administration (fda) official method for sampling the environment of commercial laying hens for the detection of salmonella enterica ssp. serovar enteritidis (salmonella enteritidis). the fda has also granted provisional acceptance of the national poultry improvement plan's (npip) salmonella isolation and identification methodology for samples taken from table-egg layer flock environments. the npip method, as with the f ... | 2015 | 26629631 |
| immortalization of fetal bovine colon epithelial cells by expression of human cyclin d1, mutant cyclin dependent kinase 4, and telomerase reverse transcriptase: an in vitro model for bacterial infection. | cattle are the economically important animals in human society. they are essential for the production of livestock products such as milk and meats. the production efficiency of livestock products is negatively impacted by infection with zoonotic pathogens. to prevent and control infectious diseases, it is important to understand the interaction between cattle tissue and pathogenic bacteria. in this study, we established an in vitro infection model of an immortalized bovine colon-derived epitheli ... | 2015 | 26624883 |
| salmonella newport causing osteomyelitis in a patient with diabetes. | salmonella is a foodborne pathogen that commonly causes intestinal symptoms. bacteraemia and extraintestinal infections have been documented within the literature, and are more frequently associated with immunodeficiency and general debilitation. we discuss the case of a previously well 36-year-old man who presented with a septic knee and new-onset diabetes. imaging confirmed osteomyelitis and a brodie's abscess, with blood and tissue cultures revealing the isolate salmonella enterica newport. h ... | 2015 | 26604232 |
| simplest identification, o-specific polysaccharide purification and antigenic evaluation of salmonella enterica serovar typhi vi negative isolate. | currently licensed typhoid vaccines are based on vi capsular polysaccharides. recent molecular reports from typhoid endemic countries state that salmonella enterica serovar typhi (s. typhi) vi negative strains occur naturally and cause typhoid fever which is indistinguishable from disease caused by vi positive strains. vaccine based on vi polysaccharide may not protect patients if the invading s. typhi are negative for vi. the lipopolysaccharide (lps) is an essential component of s. typhi outer ... | 2015 | 26600755 |
| comparison of mixed effects models of antimicrobial resistance metrics of livestock and poultry salmonella isolates from a national monitoring system. | antimicrobial use in agriculture is considered a pathway for the selection and dissemination of resistance determinants among animal and human populations. from 1997 through 2003 the u.s. national antimicrobial resistance monitoring system (narms) tested clinical salmonella isolates from multiple animal and environmental sources throughout the united states for resistance to panels of 16-19 antimicrobials. in this study we applied two mixed effects models, the generalized linear mixed model (glm ... | 2015 | 26597093 |
| mara and rama regulate virulence in salmonella enterica serovar choleraesuis. | salmonella enterica serovar choleraesuis is considered as an important porcine pathogen that causes serious systemic infections and exhibits poor response to treatment because of an increase in multidrug resistance (mdr). among the various regulators of resistance, multiple antibiotic resistance factor a (mara) and regulator of acetate metabolism a (rama) are the most effective in conferring antibiotic tolerance by activation of multidrug efflux pumps. here we investigated the regulation of viru ... | 2015 | 26608721 |
| lipidbuilder: a framework to build realistic models for biological membranes. | the physical and chemical characterization of biological membranes is of fundamental importance for understanding the functional role of lipid bilayers in shaping cells and organelles, steering vesicle trafficking and promoting membrane-protein signaling. molecular dynamics simulations stand as a powerful tool to probe the properties of membranes at atomistic level. however, the biological membrane is highly complex, and closely mimicking its physiological constitution in silico is not a straigh ... | 2015 | 26606666 |
| complete genome sequences of two outbreak strains of salmonella enterica subsp. enterica serovar thompson associated with cilantro. | salmonella enterica subsp. enterica serovar thompson strains rm1984 (cadph-99a2334) and rm1986 (cadph-99a2345) are associated with a 1999 outbreak in contaminated cilantro. we report here the complete genome sequences and annotation of these two s. thompson strains. these genomes are distinct and provide additional data for our understanding of s. enterica. | 2015 | 26586897 |
| epigenetic control of salmonella enterica o-antigen chain length: a tradeoff between virulence and bacteriophage resistance. | the salmonella enterica opvab operon is a horizontally-acquired locus that undergoes phase variation under dam methylation control. the opva and opvb proteins form intertwining ribbons in the inner membrane. synthesis of opva and opvb alters lipopolysaccharide o-antigen chain length and confers resistance to bacteriophages 9na (siphoviridae), det7 (myoviridae), and p22 (podoviridae). these phages use the o-antigen as receptor. because opvab undergoes phase variation, s. enterica cultures contain ... | 2015 | 26583926 |
| overview of molecular typing tools for the characterization of salmonella enterica in malaysia. | 2015 | 26582097 | |
| 2-aminoacrylate stress induces a context-dependent glycine requirement in rida strains of salmonella enterica. | the reactive enamine 2-aminoacrylate (2aa) is a metabolic stressor capable of damaging cellular components. members of the broadly conserved rid (rida/yer057c/uk114) protein family mitigate 2aa stress in vivo by facilitating enamine and/or imine hydrolysis. previous work showed that 2aa accumulation in rida strains of salmonella enterica led to the inactivation of multiple target enzymes, including serine hydroxymethyltransferase (glya). however, the specific cause of a rida strain's inability t ... | 2015 | 26574511 |
| complete genome sequence of salmonella enterica subsp. enterica serovar typhi isolate b/sf/13/03/195 associated with a typhoid carrier in pasir mas, kelantan, malaysia. | we report here the complete genome sequence of salmonella enterica subsp. enterica serovar typhi b/sf/13/03/195 obtained from a typhoid carrier, who is a food handler in pasir mas, kelantan. | 2015 | 26564035 |
| genome sequence of salmonella enterica subsp. enterica serovar typhi isolate pm016/13 from untreated well water associated with a typhoid outbreak in pasir mas, kelantan, malaysia. | salmonella enterica subsp. enterica serovar typhi is a human-restricted pathogen that causes typhoid fever. even though it is a human-restricted pathogen, the bacterium is also isolated from environments such as groundwater and pond water. here, we describe the genome sequence of the salmonella enterica subsp. enterica serovar typhi pm016/13 which was isolated from well water during a typhoid outbreak in kelantan, malaysia, in 2013. | 2015 | 26564032 |
| crystal structure of an antigenic outer-membrane protein from salmonella typhi suggests a potential antigenic loop and an efflux mechanism. | st50, an outer-membrane component of the multi-drug efflux system from salmonella enterica serovar typhi, is an obligatory diagnostic antigen for typhoid fever. st50 is an excellent and unique diagnostic antigen with 95% specificity and 90% sensitivity and is used in the commercial diagnosis test kit (typhidot(tm)). the crystal structure of st50 at a resolution of 2.98 å reveals a trimer that forms an α-helical tunnel and a β-barrel transmembrane channel traversing the periplasmic space and oute ... | 2015 | 26563565 |
| salmonella enterica serovar napoli infection in italy from 2000 to 2013: spatial and spatio-temporal analysis of cases distribution and the effect of human and animal density on the risk of infection. | salmonella napoli is uncommon in europe. in italy however, it has been growing in importance since 2000. to date, no risk factors have been identified to account for its rise. this study aims at describing the epidemiology, spatial and spatio-temporal patterns of s. napoli in italy from 2000 to 2013, and to explore the role of several environmental correlates, namely urbanization, altitude and number of livestock farms, on the risk of s. napoli infection among humans. | 2015 | 26558381 |
| intestinal lactic acid bacteria from muscovy duck as potential probiotics that alter adhesion factor gene expression. | the purpose of this study was to assess the suitability of lactic acid bacteria (labs) isolated from muscovy duck as a potential probiotic. isolates were identified by targeted polymerase chain reaction and assessed in vitro for probiotic characteristics such as autoaggregation; surface-charge; hydrophobicity; tolerance to acidic ph, bile salts and protease; and expression of genes involved in caco-2 cell adhesion. the lab isolates exhibited strong resistance to high bile concentration and acidi ... | 2015 | 26505375 |
| biomarker identification from next-generation sequencing data for pathogen bacteria characterization and surveillance. | the purpose was to develop an analytical pipeline for specific gene analysis and biomarker discovery from next generation sequencing (ngs) data. | 2015 | 26501894 |
| breast abscess by salmonella paratyphi a: case report and literature review. | a case of suspicious breast mass due to salmonella enterica serotype paratyphi a in a non-lactating, diabetic female is being described. the infection was successfully treated with a combination of surgical drainage and antibiotic treatment. this case highlights the fact that a focal salmonella infection involving the breast should be considered as a rare differential diagnosis for breast malignancy and submission of specimens for microbiological analysis may be helpful in establishment of an ac ... | 2015 | 26500907 |
| is200 and multilocus sequence typing for the identification of salmonella enterica serovar typhi strains from indonesia. | in this work, is200 and multi-locus sequence typing (mlst) were used to analyze 19 strains previously serotyped as salmonella enterica serovar typhi and isolated in indonesia (16 strains), mexico (2 strains), and switzerland (1 strain). most of the strains showed the most common typhi sequence types, st1 and st2, and a new typhi genotype (st1856) was described. however, one isolate from mexico and another from indonesia were of the st365 and st426 sequence types, indicating that they belonged to ... | 2015 | 26496617 |
| genome sequences of multidrug-resistant salmonella enterica serovar paratyphi b (dt+) and heidelberg strains from the colombian poultry chain. | salmonella enterica is a pathogen of significant public health importance that is frequently associated with foodborne illness. we report the whole-genome sequences of four multidrug-resistant salmonella enterica serovar paratyphi b and heidelberg strains, isolated from the colombian poultry chain. the isolates contain a variety of antimicrobial resistance genes for aminoglycosides, β-lactams, fluoroquinolones, sulfonamides, tetracycline, and trimethoprim. | 2015 | 26494672 |
| first draft genome sequence of salmonella enterica serovar gallinarum strain vtccbaa614, isolated from chicken in india. | salmonella enterica subsp. enterica serovar gallinarum biovar gallinarum causes fowl typhoid (ft), which results in huge economic losses to poultry farmers in india. we report the draft genome sequence of salmonella biovar gallinarum strain vtccbaa614, isolated from a chicken in an ft affected broiler flock. | 2015 | 26494667 |
| subtyping of salmonella food isolates suggests the geographic clustering of serotype telaviv. | salmonella is commonly found in a variety of food products and is a major cause of bacterial foodborne illness throughout the world. in this study, we investigated the prevalence and diversity of salmonella in eight different food types: sheep ground meat, cow ground meat, chicken meat, cow offal, traditional sanliurfa cheese, unripened feta cheese, pistachios, and isot (a spice blend of dried red peppers specific to sanliurfa), traditionally and commonly consumed in turkey. among 192 food sampl ... | 2015 | 26489049 |
| antimicrobial resistance and molecular typing of salmonella stanley isolated from humans, foods, and environment. | salmonella enterica serovar stanley is an important serovar that has been increasingly identified in human salmonellosis. the present study aimed to investigate the antimicrobial resistance and molecular typing of 88 salmonella stanley strains isolated from humans (diarrhea patients, n = 64; and healthy carrier, n = 1), foods (aquatic products, n = 16; vegetable, n = 1; and pork, n = 1), and environment (waste water, n = 2; and river water, n = 3) in shanghai, china from 2006 to 2012. nearly hal ... | 2015 | 26488910 |
| [a case of osteomyelitis with a granulomatous lesion caused by salmonella infantis]. | we report herein on a case of osteomyelitis with a granulomatous lesion caused by salmonella enterica subsp. enterica serovar infantis (salmonella infantis). a 30-year-old japanese man presenting with a 3-week history of left ankle pain was suspected to have either a tumor or osteomyelitis, on the basis of imaging study findings. he underwent a surgical resection of the lesion. histopathological examination revealed a granuloma. however, s. infantis was cultured from the biopsy sample. cefazolin ... | 2015 | 26554224 |
| filament formation of salmonella paratyphi a accompanied by ftsz assembly impairment and low level ppgpp. | previously, we reported that salmonella enterica serovar paratyphi a strain s602 grew into multinuclear, nonseptate, and nonlethal filaments on agar plates containing nitrogenous salts. strain s602 was more sensitive to osmotic and oxidative stress than the reference strain 3p243 of nonfilamentous salmonella paratyphi a. strain s602 had an amber mutation (c154t) in rpos. the revertant of this mutant, sr603, was repressed to form filaments under conditions with abundant nitrogenous salts. however ... | 2015 | 26549184 |
| contribution of avian salmonella enterica isolates to human salmonellosis cases in constantine (algeria). | an epidemiological investigation was carried out on one hundred salmonella isolates from broiler farms, slaughterhouses, and human patients in the constantine region of algeria, in order to explore the contribution of avian strains to human salmonellosis cases in this region over the same period of time. the isolates were characterized by phenotypic as well as genotypic methods. a large variety of antimicrobial resistance profiles was found among human isolates, while only seven profiles were fo ... | 2015 | 26543858 |
| salmonella prevalence and antimicrobial susceptibility from the national animal health monitoring system sheep 2011 study. | salmonella is a major cause of foodborne illness and can cause clinical disease in animals. understanding the on-farm ecology of salmonella will be helpful in decreasing the risk of foodborne transmission. an objective of this study was to determine the prevalence of salmonella among fecal samples collected on sheep operations in the united states. another objective was to compare the use of composite fecal samples with fecal samples collected from individual sheep as a tool for screening sheep ... | 2015 | 26540254 |
| salmonella typhimurium and salmonella sofia: growth in and persistence on eggs under production and retail conditions. | salmonellosis in australia has been linked to eggs and egg products with specific serotypes associated with outbreaks. we compared attachment to and survival on egg shells and growth in eggs of two salmonella serotypes, an egg outbreak associated salmonella typhimurium and a non-egg-associated salmonella enterica ssp. ii 1,4,12,27:b:[e,n,x] (s. sofia). experiments were conducted at combinations of 4, 15, 22, 37 and 42 °c. no significant differences occurred between the serotypes in maximum growt ... | 2015 | 26539536 |
| sampling and homogenization strategies significantly influence the detection of foodborne pathogens in meat. | efficient preparation of food samples, comprising sampling and homogenization, for microbiological testing is an essential, yet largely neglected, component of foodstuff control. salmonella enterica spiked chicken breasts were used as a surface contamination model whereas salami and meat paste acted as models of inner-matrix contamination. a systematic comparison of different homogenization approaches, namely, stomaching, sonication, and milling by fastprep-24 or speedmill, revealed that for sur ... | 2015 | 26539462 |
| salmonella grows vigorously on seafood and expresses its virulence and stress genes at different temperature exposure. | seafood is not considered the natural habitat of salmonella except the river fish, but still, the incidence of salmonella in seafood is in a steady rise. by extending our understanding of salmonella growth dynamics and pathogenomics in seafood, we may able to improve seafood safety and offer better strategies to protect the public health. the current study was thus aimed to assess the growth and multiplication of non-typhoidal and typhoidal salmonella serovars on seafood and further sought to ev ... | 2015 | 26531707 |
| draft genome sequence of salmonella enterica subsp. enterica serovar mishmarhaemek isolated from bovine feces. | salmonella enterica subsp. enterica serovar mishmarhaemek is a gram-negative, non-spore-forming, rod-shaped bacterium implicated in human clinical disease. here, we report a 4.8-mbp draft genome sequence of a nalidixic acid-resistant isolate of s. serovar mishmarhaemek. | 2015 | 26472847 |
| salmonella weltevreden food poisoning in a tea garden of assam: an outbreak investigation. | salmonella enterica serovar weltevreden has been a rare cause of acute gastroenteritis occurring worldwide. here, we report an outbreak of food poisoning in a tea garden. | 2015 | 26470955 |
| typhoid fever cases in the u.s. military. | salmonella enterica, serovar typhi (s. typhi), a causative agent of enteric fever (typhoid fever), predominately affects populations in developing regions with poor access to clean food and water. in addition, travelers to these regions are at risk of exposure. | 2015 | 26466790 |
| htpg contributes to salmonella typhimurium intestinal persistence in pigs. | salmonella enterica subspecies enterica serovar typhimurium (salmonella typhimurium) contamination of pork, is one of the major sources of human salmonellosis. the bacterium is able to persist and hide in asymptomatic carrier animals, generating a reservoir for salmonella transmission to other animals and humans. mechanisms involved in salmonella persistence in pigs remain poorly understood. in the present study, we demonstrate that the salmonella htpg gene, encoding a homologue of the eukaryoti ... | 2015 | 26466674 |
| surface (s)-layer proteins of deinococcus radiodurans and their utility as vehicles for surface localization of functional proteins. | the radiation resistant bacterium, deinococcus radiodurans contains two major surface (s)-layer proteins, hpi and slpa. the hpi protein was shown to (a) undergo specific in vivo cleavage, and (b) closely associate with the slpa protein. using a non-specific acid phosphatase from salmonella enterica serovar typhi, phon as a reporter, the surface layer homology (slh) domain of slpa was shown to bind deinococcal peptidoglycan-containing cell wall sacculi. the association of slpa with hpi on one sid ... | 2015 | 26450150 |
| invasive salmonella infections among children from rural mozambique, 2001-2014. | invasive nontyphoidal salmonella (ints) has emerged as a cause of bacteremia in african children and hiv-infected adults, which is associated with high mortality. epidemiological data and burden of ints infections in resource-constrained settings are needed to better define preventive and curative strategies. | 2015 | 26449950 |
| salmonella bacteremia among children in central and northwest nigeria, 2008-2015. | etiologic agents of childhood bacteremia remain poorly defined in nigeria. the absence of such data promotes indiscriminate use of antibiotics and delays implementation of appropriate preventive strategies. | 2015 | 26449948 |
| mathematical modeling to assess the drivers of the recent emergence of typhoid fever in blantyre, malawi. | multiyear epidemics of salmonella enterica serovar typhi have been reported from countries across eastern and southern africa in recent years. in blantyre, malawi, a dramatic increase in typhoid fever cases has recently occurred, and may be linked to the emergence of the h58 haplotype. strains belonging to the h58 haplotype often exhibit multidrug resistance and may have a fitness advantage relative to other salmonella typhi strains. | 2015 | 26449939 |
| a perspective on invasive salmonella disease in africa. | salmonella enterica is a leading cause of community-acquired bloodstream infection in africa. the contribution of typhoidal and nontyphoidal salmonella serovars to invasive disease varies considerably in place and time, even within the same country. nonetheless, many african countries are now thought to experience typhoid fever incidence >100 per 100,000 per year with approximately 1% of patients dying. invasive nontyphoidal salmonella (ints) disease was estimated to cause 3.4 million illnesses ... | 2015 | 26449937 |
| inhibition of bacterial pathogens in medium and on spinach leaf surfaces using plant-derived antimicrobials loaded in surfactant micelles. | encapsulation of hydrophobic plant essential oil components (eoc) into surfactant micelles can assist the decontamination of fresh produce surfaces from bacterial pathogens during postharvest washing. loading of eugenol and carvacrol into surfactant micelles of polysorbate 20 (tween 20), surfynol® 485w, sodium dodecyl sulfate (sds), and cytoguard® la 20 (cg20) was determined by identification of the eoc/surfactant-specific maximum additive concentration (mac). rheological behavior of dilute eoc- ... | 2015 | 26444985 |
| the novel cis-encoded antisense rna asrc positively regulates the expression of rpoe-rseabc operon and thus enhances the motility of salmonella enterica serovar typhi. | bacterial non-coding rnas are essential in many cellular processes, including response to environmental stress, and virulence. deep sequencing analysis of the salmonella enterica serovar typhi (s. typhi) transcriptome revealed a novel antisense rna transcribed in cis on the strand complementary to rsec, an activator gene of sigma factor rpoe. in this study, expression of this antisense rna was confirmed in s. typhi by northern hybridization. rapid amplification of cdna ends and sequence analysis ... | 2015 | 26441919 |
| development and comparison of a generic multiple-locus variable-number tandem repeat analysis with pulsed-field gel electrophoresis for typing of salmonella enterica subsp. enterica. | salmonella enterica subsp. enterica causes salmonellosis in humans and animals. serovar-specific multiple-locus variable-number tandem repeat analysis (mlva) is widely used for salmonella surveillance; however, isolates have to be serotyped prior to mlva typing and only the most common serovars can be typed. we developed a mlva scheme for high-discriminatory typing of salmonella. | 2015 | 26440858 |
| [antimicrobial susceptibility of salmonella enterica isolated during the pre-harvest period in swine in colombia]. | to determine the antimicrobial susceptibility of isolates of salmonella enterica isolated from animals and during the pre-slaughter period. | 2015 | 26437705 |
| assessment of the effect of a salmonella enterica ser. typhimurium culture supernatant on the single-cell lag time of foodborne pathogens. | the objective of this study was the in vitro evaluation of the effect of a cell-free microbial supernatant, produced by a luxs-positive salmonella enterica ser. typhimurium strain, on the single-cell growth kinetic behavior of two strains of s. enterica (serotypes enteritidis and typhimurium) and a methicillin-resistant staphylococcus aureus strain. the single-cell lag time (λ) of the pathogens was estimated in the absence and presence (20% v/v) of microbial supernatant based on optical density ... | 2015 | 26433459 |
| antimicrobial resistance and molecular investigation of h2s-negative salmonella enterica subsp. enterica serovar choleraesuis isolates in china. | salmonella enterica subsp. enterica serovar choleraesuis is a highly invasive pathogen of swine that frequently causes serious outbreaks, in particular in asia, and can also cause severe invasive disease in humans. in this study, 21 s. choleraesuis isolates, detected from 21 patients with diarrhea in china between 2010 and 2011, were found to include 19 h2s-negative s. choleraesuis isolates and two h2s-positive isolates. this is the first report of h2s-negative s. choleraesuis isolated from huma ... | 2015 | 26431037 |
| cross-border outbreak of salmonella enterica ssp. enterica serovar bovismorbificans: multiple approaches for an outbreak investigation in germany and switzerland. | in july 2014, an outbreak of salmonella enterica ssp. enterica serovar bovismorbificans was detected in switzerland. the goal of the outbreak investigation was to rapidly identify and eliminate the contamination source in order to prevent new cases. | 2015 | 26430716 |
| influence of temperature, source, and serotype on biofilm formation of salmonella enterica isolates from pig slaughterhouses. | quantitative assessment of in vitro biofilm formation by 40 salmonella enterica isolates isolated in pig abattoirs from animal and environmental sources (surfaces in contact and not in contact with meat) and classified in eight seroytpes was carried out by using a microtiter plate assay with spectrophotometric reading (optical density at 620 nm). biofilm-forming ability was statistically correlated with the temperature of incubation (22 and 35°c), the source of the isolates, and the antimicrobia ... | 2015 | 26408137 |
| neural network model for survival and growth of salmonella enterica serotype 8,20:-:z6 in ground chicken thigh meat during cold storage: extrapolation to other serotypes. | mathematical models that predict the behavior of human bacterial pathogens in food are valuable tools for assessing and managing this risk to public health. a study was undertaken to develop a model for predicting the behavior of salmonella enterica serotype 8,20:-:z6 in chicken meat during cold storage and to determine how well the model would predict the behavior of other serotypes of salmonella stored under the same conditions. to develop the model, ground chicken thigh meat (0.75 cm(3)) was ... | 2015 | 26408130 |
| survival of salmonella enterica in dried turkey manure and persistence on spinach leaves. | concerns about the microbiological safety of fresh produce have attracted attention in the past three decades due to multiple foodborne outbreaks. animal manure contaminated with enteric pathogens has been identified as an important preharvest pathogen source. this study investigated the survival of salmonella enterica in dust particles of dehydrated turkey manure and how association with manure dust may enhance the survival of salmonellae on leafy greens in the field. the survival of a cocktail ... | 2015 | 26408127 |
| a highly effective component vaccine against nontyphoidal salmonella enterica infections. | nontyphoidal salmonella enterica (nts) infections are a major burden to global public health, as they lead to diseases ranging from gastroenteritis to systemic infections and there is currently no vaccine available. here, we describe a highly effective component vaccine against s. enterica serovar typhimurium in both gastroenteritis and systemic murine infection models. we devised an approach to generate supernatants of s. enterica serovar typhimurium, an organism that is highly abundant in viru ... | 2015 | 26396246 |
| rapidly escalating hepcidin and associated serum iron starvation are features of the acute response to typhoid infection in humans. | iron is a key pathogenic determinant of many infectious diseases. hepcidin, the hormone responsible for governing systemic iron homeostasis, is widely hypothesized to represent a key component of nutritional immunity through regulating the accessibility of iron to invading microorganisms during infection. however, the deployment of hepcidin in human bacterial infections remains poorly characterized. typhoid fever is a globally significant, human-restricted bacterial infection, but understanding ... | 2015 | 26394303 |
| laboratory, environmental, and epidemiologic investigation and regulatory enforcement actions in response to an outbreak of salmonella bredeney infections linked to peanut butter. | background. in september 2012, the centers for disease control and prevention (cdc), u.s. food and drug administration (fda), and state and local partners investigated an outbreak of salmonella enterica serovar bredeney linked to peanut butter (pb). methods. a case was defined as infection with the outbreak strain of salmonella bredeney between june 1, 2012 and october 31, 2012. food exposure questionnaires were analyzed by the cdc to determine the food vehicle. the fda reviewed production inf ... | 2015 | 26389125 |
| genomic evidence reveals numerous salmonella enterica serovar newport reintroduction events in suwannee watershed irrigation ponds. | our previous work indicated a predominance (56.8%) of salmonella enterica serovar newport among isolates recovered from irrigation ponds used in produce farms over a 2-year period (b. li et al., appl environ microbiol 80:6355-6365, http://dx.doi.org/10.1128/aem.02063-14). this observation provided a valuable set of metrics to explore an underaddressed issue of environmental survival of salmonella by dna microarray. microarray analysis correctly identified all the isolates (n = 53) and differenti ... | 2015 | 26386063 |
| development and evaluation of live attenuated salmonella vaccines in newly hatched duckings. | domestic ducks remain a major source of zoonotic salmonella enterica infections for man worldwide and approaches to protection should include vaccine-mediated immunity. with this in mind we developed several genetically defined mutants in a virulent duck salmonella typhimurium isolate tt-1. from initial tests for virulence in day-old ducks, δrpos, δhila, and δslya mutants retained some virulence so were not studied further. amongst the mutants showing greater attenuation, δssrb, δphopq, δompr, a ... | 2015 | 26382600 |
| metal nanoparticle assisted polymerase chain reaction for strain typing of salmonella typhi. | salmonella enterica serotype typhi (s. typhi) is the causative agent of typhoid fever and remains a major health threat in most of the developing countries. the prompt diagnosis of typhoid directly from the patient's blood requires high level of sensitivity and specificity. some of us were the first to report pcr based diagnosis of typhoid. this approach has since then been reported by many scientists using different genomic targets. since the number of bacteria circulating in the blood of a pat ... | 2015 | 26381602 |
| phop, spi1, spi2 and aroa mutants of salmonella enteritidis induce a different immune response in chickens. | poultry is the most frequent reservoir of non-typhoid salmonella enterica for humans. understanding the interactions between chickens and s. enterica is therefore important for vaccine design and subsequent decrease in the incidence of human salmonellosis. in this study we therefore characterized the interactions between chickens and phop, aroa, spi1 and spi2 mutants of s. enteritidis. first we tested the response of hd11 chicken macrophage-like cell line to s. enteritidis infection monitoring t ... | 2015 | 26380970 |
| salmonella isolates in the introduced asian house gecko (hemidactylus frenatus) with emphasis on salmonella weltevreden, in two regions in costa rica. | the asian house gecko hemidactylus frenatus has been widely introduced in costa rica and tends to establish in human settlements. some studies in other invaded countries have suggested that this gecko plays a significant role in the epidemiology of salmonellosis and it is of value to public health. to our knowledge, no studies have examined salmonella from this species in costa rica. therefore, we collected 115 geckos from houses in two costa rican regions. we examined gut contents for salmonell ... | 2015 | 26378974 |
| carbapenemase-producing salmonella enterica serotype kentucky st198, north africa. | 2015 | 26377865 | |
| salmonella enterica subsp. arizonae meningitis in a neonate exposed to a corn snake. | 2015 | 26367812 | |
| eric-pcr genotyping of field isolates of salmonella enterica subsp. enterica serovar gallinarum biovars gallinarum and pullorum. | salmonella gallinarum (sg) and salmonella pullorum (sp) have been classified as biovars belonging to salmonella enterica subsp. enterica serovar gallinarum. genetic diversity among isolates of the same biovar can be detected by dna fingerprinting techniques which are useful in epidemiological investigations. in this study, we applied the pcr amplification of enterobacterial repetitive intergenic consensus sequences (eric-pcr) to analyse 45 strains of sg and sp, most of which were isolated from d ... | 2015 | 26365161 |
| factors associated with non-typhoidal salmonella bacteremia versus typhoidal salmonella bacteremia in patients presenting for care in an urban diarrheal disease hospital in bangladesh. | non-typhoidal salmonella (nts) and salmonella enterica serovar typhi bacteremia are the causes of significant morbidity and mortality worldwide. there is a paucity of data regarding nts bacteremia in south asia, a region with a high incidence of typhoidal bacteremia. we sought to determine clinical predictors and outcomes associated with nts bacteremia compared with typhoidal bacteremia. | 2015 | 26361076 |
| prevalence and characterization of monophasic salmonella serovar 1,4,[5],12:i:- of food origin in china. | salmonella enterica subsp. enterica serovar 1,4,[5],12:i:- is a monophasic variant of salmonella typhimurium, which has recently been recognized as an emerging cause of infection worldwide. this bacterium has also ranked among the four most frequent serovars causing human salmonellosis in china. however, there are no reports on its contamination in chinese food. serotyping, polymerase chain reaction, antibiotic resistance, virulotyping, and multilocus sequence typing (mlst) assays were used to i ... | 2015 | 26360603 |
| correction for blondel et al., the type vi secretion system encoded in salmonella pathogenicity island 19 is required for salmonella enterica serotype gallinarum survival within infected macrophages. | 2015 | 26359370 | |
| draft genome sequence of salmonella enterica subsp. enterica serovar napoli strain sn310, cause of a multischool outbreak in milan, italy, in 2014. | we report the draft genome sequence of salmonella enterica subsp. enterica serovar napoli strain sn310, isolated from a stool sample of an affected pupil during a multischool outbreak in 2014 in milan, italy. this represents the first reported draft genome sequence of the emerging serovar napoli. | 2015 | 26358605 |
| correction: genomic comparison of non-typhoidal salmonella enterica serovars typhimurium, enteritidis, heidelberg, hadar and kentucky isolates from broiler chickens. | 2015 | 26352414 | |
| charge and aggregation pattern govern the interaction of plasticins with lps monolayers mimicking the external leaflet of the outer membrane of gram-negative bacteria. | bacterial resistance to antibiotics has become today a major public health issue. in the development of new anti-infectious therapies, antimicrobial peptides appear as promising candidates. however, their mechanisms of action against bacterial membranes are still poorly understood. we describe for the first time the interaction and penetration of plasticins into lipid monolayers and bilayers modeling the two leaflets of the asymmetrical outer membrane of gram-negative bacteria. the lipid composi ... | 2015 | 26343162 |
| contamination of knives and graters by bacterial foodborne pathogens during slicing and grating of produce. | poor hygiene and improper food preparation practices in consumers' homes have previously been demonstrated as contributing to foodborne diseases. to address potential cross-contamination by kitchen utensils in the home, a series of studies was conducted to determine the extent to which the use of a knife or grater on fresh produce would lead to the utensil's contamination with escherichia coli o157:h7 or salmonella enterica. when shredding inoculated carrots (ca. 5.3 log cfu/carrot), all graters ... | 2015 | 26338127 |
| characterization of antimicrobial resistance in salmonella enterica strains isolated from brazilian poultry production. | antimicrobial resistance profiles and presence of resistance determinants and integrons were evaluated in salmonella enterica strains from brazilian poultry. the analysis of 203 isolates showed that those from the poultry environment (88 isolates) were significantly more resistant to antimicrobials than isolates from other sources, particularly those isolated from poultry by-product meal (106 isolates). thirty-seven isolates were resistant to at least three antimicrobial classes. class 1 integro ... | 2015 | 26337044 |
| uncovering what lies beneath a salmonella enterica empyema. | a 67-year-old woman with myelodysplastic syndrome (mds) and transfusional haemosiderosis developed salmonella empyema caused by direct extension from splenic abscesses. she was successfully treated with antibiotics, pleural decortication and splenectomy. she had presented with fever after being treated for presumed pneumonia and parapneumonic effusion 2 months prior. ct scan showed splenic abscesses eroding through the diaphragm causing a left pleural empyema. pleural fluid and spleen bacterial ... | 2015 | 26336186 |
| antibiotic resistance determinants and genetic analysis of salmonella enterica isolated from food in morocco. | antimicrobial-resistant non-typhoidal salmonella (nts) are an important cause of infection in africa, but there is a lack of information on their molecular mechanisms of resistance and epidemiology. this study contributes to fill this gap through the characterization by pulsed-field gel electrophoresis (pfge), multilocus sequence typing (mlst), plasmid profiling and analysis of antibiotic-resistance determinants of 94 salmonella enterica strains isolated from food in morocco. pfge revealed consi ... | 2015 | 26325598 |
| typhoid fever complicated by hemophagocytic lymphohistiocytosis and rhabdomyolysis. | hemophagocytic lymphohistiocytosis (hlh) and rhabdomyolysis are rare complications of typhoid fever from salmonella enterica serovar typhi. herein, we describe the clinical features in a 21-year-old female from india who presented to the intensive care unit with fever, severe pancytopenia, and rhabdomyolysis. | 2015 | 26324725 |
| salmonella bacteriuria in a cat fed a salmonella-contaminated diet. | a 9-year-old castrated male domestic shorthair cat was evaluated because of hematuria and weight loss after an 8-year history of intermittent signs of feline lower urinary tract disease (flutd). a complete diet history revealed that the cat was eating a commercial diet that does not undergo the same processing procedures as most pet foods and so might be at increased risk for bacterial contamination owing to a nonstandard industry cooking procedure. | 2015 | 26295559 |
| a live oral fowl typhoid vaccine with reversible o-antigen production. | salmonella enterica serovar gallinarum causes fowl typhoid, recognized worldwide as an economically important disease. the current vaccine, 9r, lacks a complete o antigen, which is a salmonella virulence factor, and, in addition, has a number of other less well characterized chromosomal mutations. for optimal efficacy, 9r is administered by injection. in an effort to develop a vaccine suitable for oral administration, we constructed salmonella gallinarum strains with a reversible o-antigen pheno ... | 2015 | 26292534 |
| acute hepatic necrosis caused by salmonella enterica serotype i 4,5,12:-:1,2 in a dog. | acute hepatic necrosis was diagnosed in a dog. gram staining and fluorescence in situ hybridization identified salmonella enterica in the liver, subsequently confirmed as s. enterica serotype i 4,5,12:-:1,2. this is the first report of acute hepatic necrosis with liver failure caused by salmonella in a dog. | 2015 | 26292301 |