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ferrioxamine-mediated iron(iii) utilization by salmonella enterica.utilization of ferrioxamines as sole sources of iron distinguishes salmonella enterica serotypes typhimurium and enteritidis from a number of related species, including escherichia coli. ferrioxamine supplements have therefore been used in preenrichment and selection media to increase the bacterial growth rate while selectivity is maintained. we characterized the determinants involved in utilization of ferrioxamines b, e, and g by s. enterica serotype typhimurium by performing siderophore cross- ...199910103258
evaluation of the specificity of salmonella pcr primers using various intestinal bacterial species.nine sets of pcr primers targeting salmonella were evaluated for their specificity with pure cultures of intestinal-associated bacteria prior to their application to salmonella detection in faecal samples.200314633100
linkage of avian and reproductive tract tropism with sequence divergence adjacent to the 5s ribosomal subunit rrfh of salmonella enterica.the 183 bp between the end of the 23s rrlh rrna gene and the start of the 5s rrfh rrna gene (isr-1) and the 197 bp between the end of the rrfh rrna gene and the start of the transfer rna aspu (isr-2) of salmonella enterica ssp. enterica serotypes enteritidis, typhimurium, pullorum, heidelberg, gallinarum, typhi and choleraesuis were compared. isr-1s of d1 serotypes (pullorum, gallinarum and enteritidis), b serotypes (typhimurium and heidelberg) and the c2 serotype newport and the enteric fever p ...200617005008
real-time pcr method for salmonella spp. targeting the stn gene.to develop a real-time pcr assay for salmonella spp. targeting the stn gene.200717241358
thermosensing coordinates a cis-regulatory module for transcriptional activation of the intracellular virulence system in salmonella enterica serovar typhimurium.the expression of bacterial virulence genes is tightly controlled by the convergence of multiple extracellular signals. as a zoonotic pathogen, virulence gene regulation in salmonella enterica serovar typhimurium must be responsive to multiple cues from the general environment as well as from multiple niches within animal and human hosts. previous work has identified combined magnesium and phosphate limitation as an environmental cue that activates genes required for intracellular virulence. one ...200717895240
salmonella: clinical importance and evolution of nomenclature.salmonella is an important pathogen for both humans and animals. although the organism has been intensively studied during the last century, much remains to be learned about this pathogen. the complicated nomenclature system of salmonella has long been a subject of discussion. in 2005, "salmonella enterica" finally gained official approval as the type species of the genus salmonella. the genus salmonella also contains the species "salmonella bongori" in addition to a new species, "salmonella sub ...200717760271
comparison of salmonella enterica serovar typhimurium lt2 and non-lt2 salmonella genomic sequences, and genotyping of salmonellae by using pcr.genes of salmonella enterica serovar typhimurium lt2 expected to be specifically present in salmonella were selected using the basic local alignment search tool (blast) program. the 152 selected genes were compared with 11 genomic sequences of salmonella serovars, including salmonella enterica subsp. i and iiib and salmonella bongori (v), and were clustered into 17 groups by their comparison patterns. a total of 38 primer pairs were constructed to represent each of the 17 groups, and pcr was per ...200616957240
oral immunization with an rfah mutant elicits protection against salmonellosis in mice.loss of the transcriptional antiterminator rfah results in virulence attenuation (>10(4)-fold increase in 50% lethal dose) of the archetypal salmonella enterica serovar typhimurium strain sl1344 by both orogastric and intraperitoneal routes of infection in balb/c mice. oral immunization with the mutant efficiently protects mice against a subsequent oral infection with the wild-type strain. interestingly, in vitro immunoreactivity is not confined to strain sl1344; rather, it is directed also towa ...200415213179
genomic comparison of salmonella enterica serovars and salmonella bongori by use of an s. enterica serovar typhimurium dna microarray.the genus salmonella consists of over 2,200 serovars that differ in their host range and ability to cause disease despite their close genetic relatedness. the genetic factors that influence each serovar's level of host adaptation, how they evolved or were acquired, their influence on the evolution of each serovar, and the phylogenic relationships between the serovars are of great interest as they provide insight into the mechanisms behind these differences in host range and disease progression. ...200312511502
persistent endemicity of salmonella bongori 48:z(35):--in southern italy: molecular characterization of human, animal, and environmental isolates.from 1984 to 1999, we collected 31 isolates of the rare serovar salmonella bongori 48:z(35):- in southern italy. twenty-four of the isolates were from cases of acute enteritis in humans. pulsed-field gel electrophoresis analysis showed that all but one of our isolates were at least 80% similar. our findings suggest that genetically related s. bongori 48:z(35):- strains are endemically circulating in southern italy.200212202604
salmonella bongori 48:z35:- in migratory birds, italy. 200919239780
a novel multiplex pcr assay for salmonella subspecies identification.to develop a novel multiplex polymerase chain reaction (pcr) assay with six primer pairs for salmonella subspecies identification.200919486419
evolutionary genomics of salmonella: gene acquisitions revealed by microarray analysis.the presence of homologues of salmonella enterica sv. typhimurium lt2 genes was assessed in 22 other salmonella including members of all seven subspecies and salmonella bongori. genomes were hybridized to a microarray of over 97% of the 4,596 annotated orfs in the lt2 genome. a phylogenetic tree based on homologue content, relative to lt2, was largely concordant with previous studies using sequence information from several loci. based on the topology of this tree, homologues of genes in lt2 acqu ...200212072558
salmonella effectors within a single pathogenicity island are differentially expressed and translocated by separate type iii secretion systems.pathogenicity islands (pais) are large dna segments in the genomes of bacterial pathogens that encode virulence factors. five pais have been identified in the gram-negative bacterium salmonella enterica. two of these pais, salmonella pathogenicity island (spi)-1 and spi-2, encode type iii secretion systems (ttss), which are essential virulence determinants. these 'molecular syringes' inject effectors directly into the host cell, whereupon they manipulate host cell functions. these effectors are ...200211918798
endemic presence of salmonella bongori 48:z35:- causing enteritis in children in sicily. 19989766242
phylogenetic relationships of salmonella based on rrna sequences.to establish the phylogenetic relationships between the subspecies of salmonella enterica (official name salmonella choleraesuis), salmonella bongori and related members of enterobacteriaceae, sequence comparison of rrna was performed by maximum-likelihood analysis. the two salmonella species were separated by 16s rrna analysis and found to be closely related to the escherichia coli and shigella complex by both 16s and 23s rrna analyses. the diphasic serotypes s. enterica subspp. i and vi were s ...19989731304
Salmonella bongori provides insights into the evolution of the Salmonellae.The genus Salmonella contains two species, S. bongori and S. enterica. Compared to the well-studied S. enterica there is a marked lack of information regarding the genetic makeup and diversity of S. bongori. S. bongori has been found predominantly associated with cold-blooded animals, but it can infect humans. To define the phylogeny of this species, and compare it to S. enterica, we have sequenced 28 isolates representing most of the known diversity of S. bongori. This cross-species analysis al ...201121876672
the type iii secretion system effector seoc of salmonella enterica subsp. salamae and s. enterica subsp. arizonae adp-ribosylates src and inhibits opsonophagocytosis.salmonella species utilize type iii secretion systems (t3sss) to translocate effectors into the cytosol of mammalian host cells, subverting cell signaling and facilitating the onset of gastroenteritis. in this study, we compared a draft genome assembly of salmonella enterica subsp. salamae strain 3588/07 against the genomes of s. enterica subsp. enterica serovar typhimurium strain lt2 and salmonella bongori strain 12419. s. enterica subsp. salamae encodes the salmonella pathogenicity island 1 (s ...201627736780
structure, diversity, and mobility of the salmonella pathogenicity island 7 family of integrative and conjugative elements within enterobacteriaceae.integrative and conjugative elements (ices) are self-mobile genetic elements found in the genomes of some bacteria. these elements may confer a fitness advantage upon their host bacteria through the cargo genes that they carry. salmonella pathogenicity island 7 (spi-7), found within some pathogenic strains of salmonella enterica, possesses features indicative of an ice and carries genes implicated in virulence. we aimed to identify and fully analyze ices related to spi-7 within the genus salmone ...201222247511
molecular genetic relationships of the salmonellae.a multilocus enzyme electrophoresis analysis of 96 strains of the salmonellae distinguished 80 electrophoretic types (ets) and placed them in eight groups, seven of which correspond precisely to the seven taxonomic groups (i, ii, iiia, iiib, iv, v, and vi) previously defined on the basis of biotype and genomic dna hybridization. in addition, multilocus enzyme electrophoresis identified an eighth distinctive group (designated vii) composed of five strains that had been assigned to group iv on the ...19968975610
rapid detection of salmonella enterica with primers specific for irob.the irob gene of salmonella enterica is absent from the chromosome of the related organism escherichia coli. we determined the distribution of this gene among 150 bacterial isolates, representing 51 serotypes of different salmonella species and subspecies and 8 other bacterial species which are frequent contaminants during routine enrichment procedures by southern hybridization. an irob-specific dna probe detected homologous sequences in all strains of s. enterica, including serotypes of s. ente ...19979114411
primers specific for the fimbrial major subunit gene stda can be used to detect salmonella enterica serovars.the feasibility of using two primers internal to the stda gene (which encodes the fimbrial major subunit of the std fimbrial gene cluster in salmonella enterica serovar typhi) to detect salmonella by pcr was explored. the 518-bp stda specific sequence was conserved among 268 strains from 45 serovars of s. enterica. one salmonella bongori ccug 30042 strain and 34 non-salmonella strains did not possess this sequence. a sensitivity test revealed that the stda-specific primer set detected 3.4 x 10(- ...200818592734
isolation, characterization, and u(vi)-reducing potential of a facultatively anaerobic, acid-resistant bacterium from low-ph, nitrate- and u(vi)-contaminated subsurface sediment and description of salmonella subterranea sp. nov.a facultatively anaerobic, acid-resistant bacterium, designated strain frcl, was isolated from a low-ph, nitrate- and u(vi)-contaminated subsurface sediment at site fw-024 at the natural and accelerated bioremediation research field research center in oak ridge, tenn. strain frcl was enriched at ph 4.5 in minimal medium with nitrate as the electron acceptor, hydrogen as the electron donor, and acetate as the carbon source. clones with 16s ribosomal dna (rdna) sequences identical to the sequence ...200415128557
outbreak of salmonella enteritis bongori 48:z35:- in sicily.salmonella bongori 48:z 35 :- was first isolated from a lizard in chad in 1966 and was classified as a biochemically atypical strain of the subgenus i of kauffmann. successively, some additional strains with different antigenic formulas but similar bioche199912631892
recognition of nomenclatural standing of salmonella typhi (approved lists 1980), salmonella enteritidis (approved lists 1980) and salmonella typhimurium (approved lists 1980), and conservation of the specific epithets enteritidis and typhimurium. request for an opinion.in 1994, the judicial commission of the icsb announced that le minor and popoff's request for an opinion in 1987 to designate salmonella enterica sp. nov., nom. rev. as the type and only species of the genus salmonella was denied. thus, the current species of the genus salmonella are salmonella typhimurium, salmonella enteritidis, salmonella typhi, salmonella choleraesuis (including six subspecies) and salmonella bongori, with the type species, s. choleraesuis (smith 1894) weldin 1927 (approved ...200010758910
distribution of intervening sequences in the genes for 23s rrna and rrna fragmentation among strains of the salmonella reference collection b (sarb) and sarc sets.intervening sequences (ivss) occur sporadically in several bacterial genera in the genes for 23s rrna at relatively conserved locations. they are cleaved after transcription and lead to the presence of fragmented rrna, which is incorporated into the ribosomes without religation but is nevertheless functional. the fragmentation of rrna and the number of ivss in all 72 strains of the salmonella reference collection b set and 16 strains of the salmonella reference collection c set, which have been ...200010714998
genomic subtraction identifies salmonella typhimurium prophages, f-related plasmid sequences, and a novel fimbrial operon, stf, which are absent in salmonella typhi.salmonella typhimurium causes systemic and fatal infection in inbred mice, while the related serotype salmonella typhi is avirulent for mammals other than humans. in order to identify genes from the virulent strain s. typhimurium atcc 14028 that are absent in s. typhi ty2, and therefore might be involved in s. typhimurium mouse virulence, a pcr-supported genomic subtractive hybridization procedure was employed. we have identified a novel putative fimbrial operon, stfacdefg, located at centisome ...199910482505
iron, a novel outer membrane siderophore receptor characteristic of salmonella enterica.speciation in enterobacteria involved horizontal gene transfer. therefore, analysis of genes acquired by horizontal transfer that are present in one species but not its close relatives is expected to give insights into how new bacterial species were formed. in this study we characterize iron, a gene located downstream of the irobc operon in the iroa locus of salmonella enterica serotype typhi. like irobc, the iron gene is present in all phylogenetic lineages of s. enterica but is absent from clo ...19989515912
salmonella enterotoxin (stn) gene is prevalent among strains of salmonella enterica, but not among salmonella bongori and other enterobacteriaceae.all strains and serovars of salmonella enterica such as serovar typhimurium, enteritidis, dublin, typhi, etc. were found to carry the salmonella enterotoxin determinant stn as far as examined in pcr and hybridization studies. however, using mdck cells for testing the toxicity of the strains under investigation, only a limited number of stn positive strains revealed phenotypically the salmonella enterotoxin stn. in contrast to s. enterica, other enterobacteriaceae including salmonella bongori wer ...19958580901
clonal nature of salmonella typhi and its genetic relatedness to other salmonellae as shown by multilocus enzyme electrophoresis, and proposal of salmonella bongori comb. nov.crude cell extracts of 26 isolates of salmonella serotype typhi (s. typhi) and 48 other salmonella isolates representing 28 serotypes and seven dna hybridization subgroups were analyzed for electrophoretic variants of 24 metabolic enzymes by starch gel electrophoresis. all strains of s. typhi had identical isoenzyme patterns, indicating that they were a single clone. all of the enzymes detected in the remaining strains were polymorphic, and the degree of genetic variation was quite high. the ave ...19892915026
molecular characterization of a new serovar of salmonella bongori 13,22:z39:- isolated from a lizard.three salmonella strains isolated from a lizard (gallotia simoni) in the "isla del hierro" (canary islands, spain) were serotyped as salmonella bongori serotype 13,22:z39:-, which has not been described in the kauffmann-white scheme of salmonella serovars. in order to shed light on the assignment of those strains to the s. bongori species, several genes were amplified and/or sequenced. the irob gene has been reported to be present only in s. enterica, while the inva gene has been described as be ...200515862460
functional transfer of salmonella pathogenicity island 2 to salmonella bongori and escherichia coli.the type iii secretion system (t3ss) encoded by the salmonella pathogenicity island 2 (spi2) has a central role in systemic infections by salmonella enterica and for the intracellular phenotype. intracellular s. enterica uses the spi2-encoded t3ss to translocate a set of effector proteins into the host cell, which modify host cell functions, enabling intracellular survival and replication of the bacteria. we sought to determine whether specific functions of the spi2-encoded t3ss can be transferr ...200415102800
analysis of the boundaries of salmonella pathogenicity island 2 and the corresponding chromosomal region of escherichia coli k-12.we recently identified a pathogenicity island (spi2) located at 30.7 centisomes on the salmonella typhimurium chromosome. spi2 contains genes encoding a type iii secretion system whose function is distinct from that of the type iii secretion system encoded by a pathogenicity island (spi1) at 63 centisomes which is involved in epithelial cell entry. an analysis of the boundaries of spi2 and comparison with the corresponding region of the escherichia coli chromosome revealed that spi2 inserted adj ...19979023191
a small non-coding rna of the invasion gene island (spi-1) represses outer membrane protein synthesis from the salmonella core genome.the salmonella pathogenicity island (spi-1) encodes approximately 35 proteins involved in assembly of a type iii secretion system (t3ss) which endows salmonella with the ability to invade eukaryotic cells. we have discovered a novel spi-1 gene, invr, which expresses an abundant small non-coding rna (srna). the invr gene, which we identified in a global search for new salmonella srna genes, is activated by the major spi-1 transcription factor, hild, under conditions that favour host cell invasion ...200717971080
salmonella virulence plasmid. modular acquisition of the spv virulence region by an f-plasmid in salmonella enterica subspecies i and insertion into the chromosome of subspecies ii, iiia, iv and vii isolates.the spv operon is common to all salmonella virulence plasmids. dna hybridization analysis indicates that the spv region is limited in distribution to serovars of salmonella enterica subspecies i, ii, iiia, iv, and vii and is absent from salmonella bongori isolates. among strains of subspecies ii, iiia, and vii, all isolates examined contained sequences that hybridized with the spv region. however, among isolates of subspecies i, dna sequences capable of hybridizing with the spv region were found ...19989649513
molecular phylogeny of the salmonellae: relationships among salmonella species and subspecies determined from four housekeeping genes and evidence of lateral gene transfer events.the salmonellae are a diverse group of bacteria within the family enterobacteriaceae that includes two species, salmonella enterica and salmonella bongori. in order to characterize the phylogenetic relationships of the species and subspecies of salmonella, we analyzed four housekeeping genes, gapa, phop, mdh and reca, comprising 3,459 bp of nucleotide sequence data for each isolate sequenced. sixty-one isolates representing the most common serotypes of the seven subspecies of salmonella enterica ...200818757540
rapid discrimination of salmonella isolates by single-strand conformation polymorphism analysis.a molecular typing technique was developed for the differentiation of salmonella isolates based on single-strand conformation polymorphism (sscp) analysis of amplicons generated by pcr. amplicons from parts of the fima (both the 5' and 3' ends), mdh, inva, and atpd genes were generated separately from a panel of salmonella strains representing salmonella bongori, and four subspecies and 17 serovars of salmonella enterica. these amplicons were subjected to sscp analysis for differentiation of the ...200818939738
clya cytolysin from salmonella: distribution within the genus, regulation of expression by slya, and pore-forming characteristics.functional homologs of the escherichia coli cytolysin a (clya, hlye, shea) gene have recently been detected in salmonella enterica serovars typhi (s. typhi) and paratyphi a (s. paratyphi a). in this study, analysis of a collection of salmonella strains showed that all s. typhi and s. paratyphi a strains tested harbor an intact copy of the corresponding clya variant, i.e. clya(sty) and clya(spaa), respectively. on the other hand, clya proved to be absent in the s. enterica serovar paratyphi b and ...200918715828
multiple typing of strains of salmonella enterica subsp. bongori ser. 48:z35:- isolated in southern italy.in 1984-87, 10 isolates of salmonella enterica subsp. bongori ser. 48:z35:-, 9 of human source, were identified at the southern italy centre of enterobacteriaceae. this serotype had never been identified in southern italy before 1984. the combined use of different typing methods, with particular reference to restriction enzyme fingerprinting of plasmid and chromosomal dna, supports the hypothesis that all bongor serovars derive from a single strain.19882855307
genome sequence of salmonella bongori strain n268-08. 201324336369
a simple method for directional transcriptome sequencing using illumina technology.high-throughput sequencing of cdna has been used to study eukaryotic transcription on a genome-wide scale to single base pair resolution. in order to compensate for the high ribonuclease activity in bacterial cells, we have devised an equivalent technique optimized for studying complete prokaryotic transcriptomes that minimizes the manipulation of the rna sample. this new approach uses illumina technology to sequence single-stranded (ss) cdna, generating information on both the direction and lev ...200919815668
horizontally acquired glycosyltransferase operons drive salmonellae lipopolysaccharide diversity.the immunodominant lipopolysaccharide is a key antigenic factor for gram-negative pathogens such as salmonellae where it plays key roles in host adaptation, virulence, immune evasion, and persistence. variation in the lipopolysaccharide is also the major differentiating factor that is used to classify salmonella into over 2600 serovars as part of the kaufmann-white scheme. while lipopolysaccharide diversity is generally associated with sequence variation in the lipopolysaccharide biosynthesis op ...201323818865
evolutionary genomics of salmonella enterica subspecies.abstract six subspecies are currently recognized in salmonella enterica. subspecies i (subspecies enterica) is responsible for nearly all infections in humans and warm-blooded animals, while five other subspecies are isolated principally from cold-blooded animals. we sequenced 21 phylogenetically diverse strains, including two representatives from each of the previously unsequenced five subspecies and 11 diverse new strains from s. enterica subspecies enterica, to put this species into an evolut ...201323462113
evaluation of rapid molecular detection assays for salmonella in challenging food matrices at low inoculation levels and using difficult-to-detect strains.assays for detection of foodborne pathogens are generally initially evaluated for performance in validation studies carried out according to guidelines provided by validation schemes (e.g., aoac international or the international organization for standardization). end users often perform additional validation studies to evaluate the performance of assays in specific matrices (e.g., specific foods or raw material streams of interest) and with specific pathogen strains. however, these types of end ...201526319716
evolution of salmonella nomenclature: a critical note.salmonellae are widely distributed but nomenclaturally controversial pathogens of both humans and animals. despite elaborate studies, much still remain to be discovered about these organisms. although salmonella nomenclature has proved to be rather complex, in 2005, salmonella enterica finally gained official approval as the type species of the genus salmonella. in addition, one other species has been approved and recognised in the genus salmonella, namely, salmonella bongori. new serovars (sero ...201122052214
pyrosequencing analysis of microbial community and food-borne bacteria on restaurant cutting boards collected in seri kembangan, malaysia, and their correlation with grades of food premises.this study adopts the pyrosequencing technique to identify bacteria present on 26 kitchen cutting boards collected from different grades of food premises around seri kembangan, a city in malaysia. pyrosequencing generated 452,401 of total reads of otus with an average of 1.4×10(7) bacterial cells/cm(2). proteobacteria, firmicutes and bacteroides were identified as the most abundant phyla in the samples. taxonomic richness was generally high with >1000 operational taxonomic units (otus) observed ...201525679309
cbra is a flavin adenine dinucleotide protein that modifies the escherichia coli outer membrane and confers specific resistance to colicin m.colicin m (cma) is a protein toxin produced by escherichia coli that kills sensitive e. coli cells by inhibiting murein biosynthesis in the periplasm. recombinant plasmids carrying cbra (formerly yids) strongly increased resistance of cells to cma, whereas deletion of cbra increased cma sensitivity. transcription of cbra is positively controlled by the two-component crebc system. a ╬┤creb mutant was highly cma sensitive because little cbra was synthesized. treatment of cbra-overproducing cells by ...201222773789
acidic ph sensing in the bacterial cytoplasm is required for salmonella virulence.ph regulates gene expression, biochemical activities and cellular behaviors. a mildly acidic ph activates the master virulence regulatory system phop/phoq in the facultative intracellular pathogen salmonella enterica serovar typhimurium. the sensor phoq harbors an extracytoplasmic domain implicated in signal sensing, and a cytoplasmic domain controlling activation of the regulator phop. we now report that, surprisingly, a decrease in salmonella's own cytoplasmic ph induces transcription of phop- ...201627282333
rapid classification and identification of salmonellae at the species and subspecies levels by whole-cell matrix-assisted laser desorption ionization-time of flight mass spectrometry .variations in the mass spectral profiles of multiple housekeeping proteins of 126 strains representing salmonella enterica subsp. enterica (subspecies i), s. enterica subsp. salamae (subspecies ii), s. enterica subsp. arizonae (subspecies iiia), s. enterica subsp. diarizonae (subspecies iiib), s. enterica subsp. houtenae (subspecies iv), and s. enterica subsp. indica (subspecies vi), and salmonella bongori were analyzed to obtain a phylogenetic classification of salmonellae based on whole-cell m ...200818952875
genome sequence of salmonella bongori strain n268-08 [corrected].salmonella bongori is a close relative of the highly virulent members of s. enterica subspecies enterica, encompassing more than 2,500 serovars, most of which cause human salmonellosis, one of the leading food-borne illnesses. s. bongori is only very rarely implicated in infections. we here present the sequence of a clinical isolate from switzerland, s. bongori strain n268-08.201323969046
lac repressor is an antivirulence factor of salmonella enterica: its role in the evolution of virulence in salmonella.the genus salmonella includes many pathogens of great medical and veterinary importance. bacteria belonging to this genus are very closely related to those belonging to the genus escherichia. laczya operon and laci are present in escherichia coli, but not in salmonella enterica. it has been proposed that salmonella has lost laczya operon and laci during evolution. in this study, we have investigated the physiological and evolutionary significance of the absence of laci in salmonella enterica. us ...200919495420
pathogenic microorganisms carried by migratory birds passing through the territory of the island of ustica, sicily (italy).several studies have shown that migratory birds play an important role in the ecology, circulation and dissemination of pathogenic organisms. in october 2006, a health status evaluation was performed on a large population of migratory birds passing through the territory of ustica (italy), an island located on the migration route of many species of birds to africa, and various laboratory tests were conducted. in total, 218 faecal swabs and the internal organs of 21 subjects found dead in nets wer ...201121812720
supplement 2003-2007 (no. 47) to the white-kauffmann-le minor scheme.this supplement reports the characterization of 70 new salmonella serovars recognized between 2003 and 2007 by the who collaborating center for reference and research on salmonella: 44 were assigned to salmonella enterica subspecies enterica, 11 to subspecies salamae, 5 to subspecies arizonae, 8 to subspecies diarizonae, one to subspecies houtenae and one to salmonella bongori. one new serovar, mygdal, displayed a new h factor, h:z(91).201019840847
real-time pcr detection of salmonella species using a novel target: the outer membrane porin f gene (ompf).to evaluate the outer membrane porin f gene (ompf) for the specific detection of salmonella species by real-time pcr assay.201020438619
activation of master virulence regulator phop in acidic ph requires the salmonella-specific protein ugtl.acidic conditions, such as those inside phagosomes, stimulate the intracellular pathogen salmonella enterica to activate virulence genes. the sensor phoq responds to a mildly acidic ph by phosphorylating, and thereby activating, the virulence regulator phop. this phop/phoq two-component system is conserved in a subset of gram-negative bacteria. phoq is thought to be sufficient to activate phop in mildly acidic ph. however, we found that the salmonella-specific protein ugtl, which was horizontall ...201728851823
whole-genome shotgun sequence of salmonella bongori, first isolated in northwestern italy.this study describes the whole-genome shotgun sequence of salmonella bongori 48:z35:-, originally isolated from a 1-year-old symptomatic patient in northwest italy, a typically nonendemic area. the draft genome sequence contained 4.56 mbp and the g+c content was 51.27%.201728684570
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