Publications
| Title | Abstract | Year(sorted descending) Filter | PMID Filter |
|---|
| a comparative synteny map of burkholderia species links large-scale genome rearrangements to fine-scale nucleotide variation in prokaryotes. | genome rearrangement events, including inversions and translocations, are frequently observed across related microbial species, but the impact of such events on functional diversity is unclear. to clarify this relationship, we compared 4 members of the gram-negative burkholderia family (burkholderia pseudomallei, burkholderia mallei, burkholderia thailandensis, and burkholderia cenocepacia) and identified a core set of 2,590 orthologs present in all 4 species (metagenes). the metagenes were orga ... | 2008 | 18162473 |
| role of escherichia coli in acute diarrhoea in tribal preschool children of central india. | five hundred and eighty preschool children belonging to tribal areas of madhya pradesh were followed up daily for the presence of diarrhoea for a period of 1 year. in all, 1236 episodes of diarrhoea were recorded with an average of 2.13 episodes per child per year. stool samples were collected during 780 episodes. they were cultured to isolate escherichia coli as well as non-e. coli enteropathogens. ten different genes were detected to identify all diarrhoeagenic e. coli using multiplex polymera ... | 2008 | 18173783 |
| diarrheagenic escherichia coli and shigella strains isolated from children in a hospital case-control study in hanoi, vietnam. | this case-control study detected and characterized shigella and diarrheagenic escherichia coli (dec) types among vietnamese children less than 5 years old. in 249 children with diarrhea and 124 controls, shigella spp. was an important cause of diarrhea (p < 0.05). we used multiplex pcr and dna probes to detect enteroinvasive e. coli (eiec), enteroaggregative e. coli (eaggec), enteropathogenic e. coli (epec), attaching and effacing e. coli (a/eec), verocytotoxin-producing e. coli (vtec), and ente ... | 2008 | 18174300 |
| full structural characterization of shigella flexneri m90t serotype 5 wild-type r-lps and its delta galu mutant: glycine residue location in the inner core of the lipopolysaccharide. | shigella flexneri is a gram-negative bacterium responsible for serious enteric infections that occur mainly in the terminal ileum and colon. high interest in shigella, as a human pathogen, is driven by its antibiotic resistance and the necessity to develop a vaccine against its infections. vaccines of the last generation use carbohydrate moieties of the lipopolysaccharide as probable candidates. for this reason, the primary structure of the core oligosaccharide from the r-lps produced by s. flex ... | 2008 | 18174310 |
| ph sensitivity of type iii secretion system tip proteins. | many pathogenic gram-negative bacteria employ type iii secretion systems to transport proteins into the host cell membrane and cytoplasm to subvert normal cellular functions. the type iii secretion apparatus consists of a basal body spanning the inner and outer bacterial membranes and a needle which extends away from the bacterium. recent work has found that a special class of proteins localizes to the tip of the needle to control secretion of effector proteins. five of these tip proteins are ip ... | 2008 | 18175320 |
| identification of newly recognized serotype 1c as the most prevalent shigella flexneri serotype in northern rural vietnam. | we investigated the identity of 37 shigella flexneri strains that had previously been isolated from northern rural vietnam (son tay province) and described as untypable. twenty-four isolates reacted with masf 1c, a monoclonal antibody specific for s. flexneri serotype 1c. a further ten untypable isolates were found to be rough mutants (no longer expressing o-antigen) that were derived from serotype 1c strains. pulsed-field gel electrophoresis demonstrated that these strains consisted of many dif ... | 2008 | 17922932 |
| a role for nod-like receptors in autophagy induced by shigella infection. | shigella infection, the cause of bacillary dysentery, induces caspase-1 activation and cell death in macrophages, but the precise mechanisms remain poorly understood. in our recent study, we presented evidence that caspase-1 activation and il-1beta processing induced by shigella are mediated through ipaf, a cytosolic pattern-recognition receptor of the nucleotide-binding oligomerization domain (nod)-like receptor (nlr) family and the adaptor protein apoptosis-associated speck-like protein contai ... | 2008 | 17932464 |
| development of a tripartite vector system for live oral immunization using a gram-negative probiotic carrier. | the mucosa represents the primary target site and thus the first barrier for most microbial pathogens. nevertheless, nearly all present-day vaccines are applied by an invasive route, target the systemic immune system, and do not confer efficient mucosal protection. currently, mucosal immunity can only be achieved by the delivery of antigens via the mucosal route. therefore, multiple efforts are under way to develop mucosal vaccines and particularly live oral vaccines as these would confer consid ... | 2008 | 17936683 |
| [hemolytic and uremic syndrome in the child]. | hemolytic and uremic syndrome (hus) is characterized by the association of hemolytic anemia with sckizocytes, thrombopenia and renal involvement secondary to thrombotic microangiopathy. the typical form is the most frequent in children occurring after an episode of diarrhea caused by escherichia coli. other microorganisms may be responsible for hus such as shigella dysenteriae or streptococcus pneumoniae. acute renal failure is reversible in most cases, but long-term renal sequelae are seen in o ... | 2008 | 17964233 |
| synthesis, characterization and antibacterial activity of cobalt(iii) complexes with pyridine-amide ligands. | the ligands 2-(n-(x-pyridyl)carbamoyl)pyridine (x=2, 3 or 4 for hl1-hl3, respectively) and 2,6-bis(n-(y-pyridyl)carbamoyl)pyridine (y=2, 3 or 4 for h2l4-h2l6, respectively) in their mono- and di-deprotonated forms have been used to synthesize kinetically stable cobalt(iii) compounds [co(l1-3)3] (1-3) and na[co(l4-6)2] (4-6), respectively. the co(iii) ion is in octahedral environment and is surrounded by three bidentate ligands in complexes 1-3 and two tridentate ligands in complexes 4-6. ligands ... | 2008 | 17959275 |
| the pattern-recognition molecule nod1 is localized at the plasma membrane at sites of bacterial interaction. | the pattern-recognition molecule nod1 is a critical sensor for bacterial derived diaminopimelic acid-containing peptidoglycan fragments which induces innate immune responses in epithelial cells. here we report the subcellular localization of this protein in human epithelial cells. nod1 is localized in the cytosol and at the plasma membrane in human cells. this membrane association is dependent on the integrity of the protein, on its signalling capacity and on an intact actin cytoskeleton. signal ... | 2008 | 17970764 |
| the nlee/ospz family of effector proteins is required for polymorphonuclear transepithelial migration, a characteristic shared by enteropathogenic escherichia coli and shigella flexneri infections. | enteropathogenic escherichia coli (epec) and shigella flexneri are human host-specific pathogens that infect intestinal epithelial cells. however, each bacterial species employs a different infection strategy within this environmental niche. epec attaches to the apical surface of small intestine enterocytes, causing microvillus effacement and rearrangement of the host cell cytoskeleton beneath adherent bacteria. in contrast, s. flexneri invades the large intestine epithelium at the basolateral m ... | 2008 | 17984206 |
| evaluating burkholderia pseudomallei bip proteins as vaccines and bip antibodies as detection agents. | burkholderia pseudomallei is a biothreat agent and an important natural pathogen, causing melioidosis in humans and animals. a type iii secretion system (ttss-3) has been shown to be critical for virulence. because ttss components from other pathogens have been used successfully as diagnostic agents and as experimental vaccines, it was investigated whether this was the case for bipb, bipc and bipd, components of b. pseudomallei's ttss-3. the sequences of bipb, bipc and bipd were found to be high ... | 2008 | 17995960 |
| bacterial and fungal infections among diagnostic laboratory workers: evaluating the risks. | accidental infections acquired in the laboratory environment are not reportable in a formal forum outside the institution, and therefore, there is little opportunity to evaluate such occurrences and learn from them. we evaluated voluntary responses from 88 facilities, 53 large hospitals (>200 beds) or academic institutions, 32 smaller facilities (<200 beds), and 3 national reference diagnostic laboratories. thirty-eight of the laboratories (43%), 15 large and 23 small facilities, reported no kno ... | 2008 | 17997259 |
| enteropathogen resource integration center (eric): bioinformatics support for research on biodefense-relevant enterobacteria. | eric, the enteropathogen resource integration center (www.ericbrc.org), is a new web portal serving as a rich source of information about enterobacteria on the niaid established list of select agents related to biodefense-diarrheagenic escherichia coli, shigella spp., salmonella spp., yersinia enterocolitica and yersinia pestis. more than 30 genomes have been completely sequenced, many more exist in draft form and additional projects are underway. these organisms are increasingly the focus of st ... | 2008 | 17999997 |
| priming of cd4+ t cells with porin of shigella dysenteriae activates the cells toward type 1 polarization. | macrophages treated with porin of shigella dysenteriae were potent stimulators of naive t(h) cells since the porin-pulsed macrophages strongly proliferated the t cells and up-regulated the activation molecules cd69 and cd25 on cd4(+) t cells in allogeneic mixed leukocyte reaction. immunization of c57bl/6 mice with porin selectively induced the intracellular expression and release of ifn-gamma and had no effect on il-4 expression. in parallel to the predominant release of the t(h)1 cytokine ifn-g ... | 2008 | 18003602 |
| shiga toxin 1 induces apoptosis through the endoplasmic reticulum stress response in human monocytic cells. | shiga toxins (stxs) expressed by the enteric pathogens shigella dysenteriae 1 and enterohaemorrhagic escherichia coli are potent protein synthesis inhibitors. shiga toxins have also been shown to induce apoptosis in epithelial, endothelial and monocytic cells. the precise relationship between protein synthesis inhibition and induction of apoptosis is not known. we show that stimulation of the myelogenous leukaemia cell line thp-1 with purified stx1 induced the endoplasmic reticulum (er) stress r ... | 2008 | 18005243 |
| contribution of the sitabcd, mnth, and feob metal transporters to the virulence of avian pathogenic escherichia coli o78 strain chi7122. | the roles of sitabcd, mnth, and feob metal transporters in the virulence of avian pathogenic escherichia coli (apec) o78 strain chi7122 were assessed using isogenic mutants in chicken infection models. in a single-strain infection model, compared to chi7122, the deltasit strain demonstrated reduced colonization of the lungs, liver, and spleen. complementation of the deltasit strain restored virulence. in a coinfection model, compared to the virulent apec strain, the deltasit strain demonstrated ... | 2008 | 18025097 |
| muramylpeptide shedding modulates cell sensing of shigella flexneri. | bacterial infections trigger the activation of innate immunity through the interaction of pathogen-associated molecular patterns (pamps) with pattern recognition molecules (prms). the nucleotide-binding oligomerization domain (nod) proteins are intracellular prms that recognize muramylpeptides contained in peptidoglycan (pgn) of bacteria. it is still unclear how nod1 physically interacts with pgn, a structure internal to the gram-negative bacterial envelope. to contribute to the understanding of ... | 2008 | 18042252 |
| the versatility of shigella effectors. | when shigella infect the intestinal epithelium, they deliver several effectors through the type iii secretion system (t3ss) into the surrounding space and directly into the host-cell cytoplasm, where they can mimic and usurp host cellular functions or subvert host-cell signalling pathways and the immune response. although bacterial strategies and mechanisms of infection vary greatly, recent studies of shigella effectors have revealed that shigella possess a highly evolved strategy for infection. | 2008 | 18059288 |
| bacterial reduction of selenate to elemental selenium utilizing molasses as a carbon source. | selecting an inexpensive and effective organic carbon source is the key to reducing the cost in selenium (se) remediation. five bacteria were screened based on their ability in using molasses as an organic carbon source to reduce selenate [se(vi)] in drainage water. efficiency of se removal differed in the molasses-added drainage water containing different bacteria, with an order of enterobacter taylorae>pantoea sp. sss2>klebsiella sp. wrs2>citerobacter freundii>shigella sp. dw2. by using e. tay ... | 2008 | 17512724 |
| emerging resistance to newer antimicrobial agents among shigella isolated from finnish foreign travellers. | in finland, most cases of shigellosis are related to travel abroad. antimicrobial drug resistance of 1814 shigella strains isolated from finnish patients during 1990-2005 was studied using discs of 12 antimicrobial agents. since 2000, the e-test has been performed to determine ciprofloxacin minimum inhibitory concentrations of nalidixic acid-resistant isolates. the proportion of multi-resistant strains (resistant to >or =4 antimicrobials) was highest among isolates from china and india, but is i ... | 2008 | 17578602 |
| risk areas and neighborhood-level risk factors for shigella dysenteriae 1 and shigella flexneri. | annually, there are 165 million cases of shigellosis resulting in 1.1 million deaths in the developing world. two species of the causative agent, shigella dysenteriae 1 and shigella flexneri, are responsible for acute diarrheal illness. vaccines are being developed against both but many questions remain about the disease burden, distribution of species in space and time, and community-level risk factors. this study answers two questions. what are the differences in neighborhood-level risk factor ... | 2008 | 17602851 |
| detection of the causative agent of furunculusis, aeromonas salmonicida in salmonids of the krka river. | in this paper we describe the bacterial community associated with salmonids from the krka river. diversity analysis demonstrated that majority of the recovered bacteria were related to aeromonadaceae group. bacterial analysis also revealed the presence of shigella spp. and pseudomonas fluorescens. isolation of aeromonas salmonicida from trout, presents first isolation of this bacteria croatian rivers. | 2008 | 17624808 |
| part ii. analysis of data gaps pertaining to shigella infections in low and medium human development index countries, 1984-2005. | the global incidence of shigella infection has been estimated at 80-165 million episodes annually, with 99% of episodes occurring in the developing world. to identify contemporary gaps in the understanding of the global epidemiology of shigellosis, we conducted a review of the english-language scientific literature from 1984 to 2005, restricting the search to low and medium human development countries. our review yielded 11 population-based studies of shigella burden from seven countries. no pop ... | 2008 | 17686195 |
| drastic decrease of salmonella enteritidis isolated from humans in belgium in 2005, shift in phage types and influence on foodborne outbreaks. | in belgium, non-typhoidal salmonellosis and campylobacteriosis are the two most frequently reported foodborne illnesses. during 2005, a 71% decrease of salmonella enteritidis infections compared with the average annual number cases in the period 2000-2004 was recorded by the belgian national reference centre for salmonella and shigella. after the peak of 1999, the total number of salmonellosis cases decreased gradually, with the exception of 2003 when an increase was again recorded due to the ri ... | 2008 | 17645812 |
| isolation and antibiotic susceptibility of salmonella and shigella strains isolated from children in gaza, palestine from 1999 to 2006. | diarrhea and acute gastroenteritis are among the leading causes of illnesses and death in infants and children throughout the world, especially in developing countries, globally, salmonella and shigella remain the major contributors to acute enteric infections and diarrhea. | 2008 | 17854424 |
| role of shigella infection in endometriosis: a novel hypothesis. | endometriosis is the presence of endometrial cells and stroma at ectopic sites outside the uterine cavity. the natural history of endometriosis is uncertain, its etiology unknown, the clinical presentation inconsistent, diagnosis difficult and the treatment poorly standardized. it causes significant morbidity due to pelvic pain and infertility among 15-25% of women during their reproductive age. the benign disease causes peritoneal inflammation, fibrosis, adhesions and ovarian cysts but displays ... | 2008 | 17888583 |
| clostridium difficile: an under-recognized cause of reactive arthritis? | reactive arthritis usually presents as a sterile, inflammatory, asymmetric oligoarthritis, affecting large lower extremity joints. extra-articular features (conjunctivitis, uveitis, enthesopathy, urethritis, balanitis, keratoderma blenorrhagicum) may occur. common causes of enteric reactive arthritis are preceding infections attributable to salmonella, shigella, campylobacter, and yersinia. in contrast, clostridium difficile is an uncommon cause of reactive arthritis, with only approximately 40 ... | 2008 | 17902012 |
| coliforms and prevalence of escherichia coli and foodborne pathogens on minimally processed spinach in two packing plants. | minimally processed spinach has been recently associated with outbreaks of foodborne illnesses. this study investigated the effect of commercial minimal processing of spinach on the coliform and escherichia coli counts and the prevalence of e. coli o157:h7, salmonella, shigella spp., and listeria monocytogenes on two types of spinach before and after minimal processing. a total of 1,356 spinach samples (baby spinach, n = 574; savoy spinach, n = 782) were collected daily in two processing plants ... | 2008 | 19244890 |
| antimicrobial activity of some macrophytes from lake manzalah (egypt). | the antimicrobial activities of aqueous and organic solvents (chloroform, ethanol and methanol) extracts of four plants ceratophyllum demersum l., eichhornia crassipes, potamogeton crispus and potamogeton pectinatus were tested in vitro against seventeen different microorganisms including gram-positive and gram-negative bacteria and fungi. nine of these identified organisms were obtained from different sources, bacillus subtilis 1020, bacillus cereus 1080, staphylococcus aureus, erwinia carotovo ... | 2008 | 19205264 |
| shigella and salmonella serogroups and their antibiotic susceptibility patterns in ethiopia. | in this study, the serogroup and susceptibility patterns of shigella and salmonella spp. isolated from stool cultures were determined using standard laboratory procedures. among the 76 shigella isolates serogroup b (sh. flexeneri) was the most prevalent species (54.0%) and among the 37 salmonella strains serogroup b was also the most prevalent (81.1%). antibiograms of shigella and salmonella spp. showed 100% resistance to erythromycin and high resistance rates (> or = 75%) to ampicillin, cephalo ... | 2008 | 19166157 |
| [typing of shigella sonnei strains isolated in some provinces of turkey using antimicrobial resistance and pulsed field gel electrophoresis methods]. | shigella species may lead to large epidemics owing to their low infective doses and frequent transmission from person to person with high secondary attack rates. shigella sonnei is one of the most prevalent causative agent of infectious gastroenteritis in developing and developed countries and it is the most frequently reported shigella serotype from turkey in recent years. the aim of this study was to determine the types of s. sonnei strains isolated in different provinces of turkey [in marmara ... | 2008 | 19149077 |
| [evaluation of laboratory diagnosis of the first norovirus outbreak in turkey in 2008]. | norovirus (nov) is one of the most prominent agents of gastroenteritis and water/food-borne outbreaks affecting all of the age groups in the world. as the identification of the etiologic agent is important during gastroenteritis outbreaks, it is recommended to combine two different methods for rapid and reliable laboratory diagnosis of nov. although nov outbreaks have been observed in many different countries of the world, there was no report on "nov outbreak" in turkey till 2008 due to the abse ... | 2008 | 19149082 |
| in silico comparison of simple sequence repeats in high nucleotides-rich genomes of microorganism. | this study determined the distribution of a specific group of simple sequence repeats (ssrs), in genome sequences of 7 chromosomes (shigella flexneri 2a str 301 and 2457 t, shigella sonnei, e. coli k12, m. tuberculosis, m. leprae and s. saprophytycus) have downloaded from the genbank database for identifying abundance, distribution and composition of ssrs. the data obtained in the present study show that: (i) tandem repeats are widely distributed throughout the genomes. (ii) ssrs are differentia ... | 2008 | 19137845 |
| oral immunization: an update. | oral immunization with vaccines against intestinal infectious diseases has been extensively explored for several decades. despite the immunologic and economic rationale behind oral immunization, only a few mucosal vaccines are available for the prevention of mucosal infections. here, we summarize the current status of such vaccines, with a focus on intestinal infectious diseases, describe alternative approaches, and analyze advantages and difficulties encountered with a broad implementation of t ... | 2008 | 19122521 |
| genomic analysis of bacteriophage epsilon 34 of salmonella enterica serovar anatum (15+). | the presence of prophages has been an important variable in genetic exchange and divergence in most bacteria. this study reports the determination of the genomic sequence of salmonella phage epsilon 34, a temperate bacteriophage that was important in the early study of prophages that modify their hosts' cell surface and is of a type (p22-like) that is common in salmonella genomes. | 2008 | 19091116 |
| analysis of plasmid genes by phylogenetic profiling and visualization of homology relationships using blast2network. | phylogenetic methods are well-established bioinformatic tools for sequence analysis, allowing to describe the non-independencies of sequences because of their common ancestor. however, the evolutionary profiles of bacterial genes are often complicated by hidden paralogy and extensive and/or (multiple) horizontal gene transfer (hgt) events which make bifurcating trees often inappropriate. in this context, plasmid sequences are paradigms of network-like relationships characterizing the evolution o ... | 2008 | 19099604 |
| [detection and identification of seven clinical common pathogenic bacteria by oligonucleotide microarray]. | using 16s rdna and 23s rdna genes as the target sequences to develop a system based on oligonucleotide microarray and to detect the seven clinical pathogenic bacteria, commonly seen. | 2008 | 19103121 |
| water-related diseases outbreaks reported in italy. | water related disease outbreak (wrdo) statistics in italy from 1998 to 2005 have been discussed in this paper. the true incidence of wrdo is not reflected in the national surveillance system (nss), although this study has provided information on pathogens associated to different water sources, incidence in regions and inadequacy of regulations. 192 outbreaks and 2546 cases of wrd were reported to the nss, an average of 318 cases per year. cases were associated to shellfish (58.79%), drinking wat ... | 2008 | 19108563 |
| shigella from humans in thailand during 1993 to 2006: spatial-time trends in species and serotype distribution. | in thailand during 1993-2006, a total of 9063 shigella isolates from different medical centers were serotyped and trends over time and spatial clustering analyzed. of 3583 cases with age information, 1315 (37%) cases were from children between 0 and 4 years and 684 (19%) from children between 5 and 8 years. most infections were recorded during 1993-1994 (> 1500 per year), decreasing to < 200 in 2006. the relative species distribution also changed. during 1993-1994, shigella flexneri accounted fo ... | 2008 | 19086804 |
| [structures of o-polysaccharides from two shigella dysenteriae type 8 strains]. | the structure of the o-polysaccharide (o-antigen) from shigella dysenteriae type 8 bacteria (strain 599) was corrected using modern nmr techniques (structure 1). the revisions concerned the position of the glc residue (in the main, but not the side, chain), the site of its substitution, and the configuration of the o-glycoside linkage of the glcnac residue. the s. dysenteriae type 8 bacterium (strain g1221), the second investigated representative, was found to produce another structural variant ... | 2008 | 19088755 |
| characterization of shigella spp. by antimicrobial resistance and pcr detection of ipa genes in an infantile population from porto velho (western amazon region), brazil. | the incidence of shigella spp. was assessed in 877 infants from the public hospital in rondônia (western amazon region, brazil) where shigella represents the fourth cause of diarrhea. twenty-five isolates were identified: 18 were shigella flexneri, three shigella sonnei, three shigella boydii and one shigella dysenteriae. with the exception of s. dysenteriae, all shigella spp. isolated from children with diarrhea acquired multiple antibiotic resistances. pcr detection of ipa virulence genes and ... | 2008 | 19057826 |
| increased isolation and characterization of shigella sonnei obtained from hospitalized children in tehran, iran. | shigella flexneri has been the most frequent cause of shigellosis in children in iran. to evaluate the changes in frequency of serogroups, 302 shigella species were isolated in 2003 from hospitalized children, aged less than 12 years, with acute diarrhoea in tehran, iran. the number of collected s. sonnei, s. flexneri, s. boydii, and s. dysenteriae isolates was 178 (58.9%), 110 (37.4%), 10 (3.3%), and 4 (1.3%) respectively. most (94%) s. sonnei isolates were resistant to co-trimoxazole. they wer ... | 2008 | 19069621 |
| prevalence of bacteria and intestinal parasites among food-handlers in gondar town, northwest ethiopia. | food-handlers with poor personal hygiene working in food-service establishments could be potential sources of infection due to pathogenic organisms. the study was undertaken to determine the prevalence of bacteria and intestinal parasites among 127 food-handlers working in the cafeterias of the university of gondar and the gondar teachers training college, gondar, ethiopia. fingernail contents of both the hands and stool specimens were collected from all the 127 food-handlers. the samples were e ... | 2008 | 19069624 |
| prevalence of shigella serogroups and their antimicrobial resistance patterns in southern trinidad. | the serogroup distribution and antimicrobial susceptibility patterns of shigella isolates obtained from stool specimens of persons with acute diarrhoea in community-based studies from southern trinidad during 1997-2006 were reviewed. of the 5,187 stool specimens, 392 (8%) were positive for shigella organisms. from these 392 isolates, 88.8% were recovered from children aged >0-10 year(s). shigella sonnei was the most frequently-isolated serogroup (75%), followed by s. flexneri (19%), s. boydii (4 ... | 2008 | 19069625 |
| gef-h1 mediated control of nod1 dependent nf-kappab activation by shigella effectors. | shigella flexneri has evolved the ability to modify host cell function with intracellular active effectors to overcome the intestinal barrier. the detection of these microbial effectors and the initiation of innate immune responses are critical for rapid mucosal defense activation. the guanine nucleotide exchange factor h1 (gef-h1) mediates rhoa activation required for cell invasion by the enteroinvasive pathogen shigella flexneri. surprisingly, gef-h1 is requisite for nf-kappab activation in re ... | 2008 | 19043560 |
| outbreaks where food workers have been implicated in the spread of foodborne disease. part 4. infective doses and pathogen carriage. | in this article, the fourth in a series reviewing the role of food workers in foodborne outbreaks, background information on the presence of enteric pathogens in the community, the numbers of organisms required to initiate an infection, and the length of carriage are presented. although workers have been implicated in outbreaks, they were not always aware of their infections, either because they were in the prodromic phase before symptoms began or because they were asymptomatic carriers. pathoge ... | 2008 | 19044283 |
| the acrab-tolc pump is involved in multidrug resistance in clinical shigella flexneri isolates. | the two multiple-antibiotic resistance (mar) phenotypes (n = 8, respectively) and susceptible isolates (n = 4) of shigella flexneri from china were characterized involving the efflux pump acrab-tolc. the accumulation of ciprofloxacin, acrab-tolc pcr, and levels of mrna with northern blots were performed in three groups. sequencing of acrab-tolc was performed in selected isolates. an efflux inhibition was performed with phe-arg-beta-naphthylamide. the accumulation of ciprofloxacin at steady state ... | 2008 | 19035770 |
| biometric fingerprinting for visa application: device and procedure are risk factors for infection transmission. | biometric fingerprint identity verification is currently introduced in visa application and entry screening at border control. the system implies physical contact between the skin and the surface of the fingerprint-capturing and reading devices. | 2008 | 19006507 |
| functional nanoparticle-based proteomic strategies for characterization of pathogenic bacteria. | although matrix-assisted laser desorption/ionization mass spectrometry (maldi ms) can be employed to rapidly characterize pathogenic bacteria, bacterial cultures are generally required to obtain sufficient quantities of the bacterial cells prior to maldi ms analysis. if this time-consuming step could be eliminated, the length of time required for identification of bacterial strains would be greatly reduced. in this paper, we propose an effective means of rapidly identifying bacteria--one that do ... | 2008 | 19007241 |
| spa32 interaction with the inner-membrane spa40 component of the type iii secretion system of shigella flexneri is required for the control of the needle length by a molecular tape measure mechanism. | the effectors of enterocyte invasion by shigella are dependent on a type iii secretion system that contains a needle whose length average does not exceed 50 nm. previously, we reported that spa32 is required for needle length control as well as to switch substrate specificity from mxih to ipa proteins secretion. to identify functional domains of spa32, 11 truncated variants were constructed and analysed for their capacity (i) to control the needle's length; (ii) to secrete the ipa proteins; and ... | 2008 | 19019157 |
| is escherichia coli o157:h7 a common pathogen in children with bloody diarrhea in shiraz, iran? | escherichia coli (e. coli) o157:h7 is a common cause of bloody diarrhea in developed countries. the aim of this study was to determine whether e. coli o157:h7 is a possible pathogen of bloody diarrhea in southern iran. out of 719 children with diarrhea, 243 (34%) patients with positive occult blood took part in our study. the polyclonal antibody test and polymerase chain reaction (pcr) were used to identify e. coli o157:h7. stool cultures showed enteropathogens in 107 patients (44%). shigella (3 ... | 2008 | 19014048 |
| [antibiotic resistance of bacterial strains in paediatric infections: there are resistance and resistance!]. | isolation of a bacterial strain at the infectious site and determination of the susceptibility profile may help to guide appropriate antibiotic treatment. however technical difficulties justify interpretative reading to recognize interfering resistance mechanisms from resistance phenotypes. the aim of this article is to give some examples showing interpretative reading of routine sensitivity test data. | 2008 | 19000854 |
| structure of the shigella t3ss effector ipah defines a new class of e3 ubiquitin ligases. | ipah proteins are e3 ubiquitin ligases delivered by the type iii secretion apparatus into host cells upon infection of humans by the gram-negative pathogen shigella flexneri. these proteins comprise a variable leucine-rich repeat-containing n-terminal domain and a conserved c-terminal domain harboring an invariant cysteine residue that is crucial for activity. ipah homologs are encoded by diverse animal and plant pathogens. here we demonstrate that the ipah c-terminal domain carries the catalyti ... | 2008 | 18997778 |
| structure of a shigella effector reveals a new class of ubiquitin ligases. | bacterial pathogens have evolved effector proteins with ubiquitin e3 ligase activities through structural mimicking. here we report the crystal structure of the shigella flexneri type iii effector ipah3, a member of the leucine-rich repeat (lrr)-containing bacterial e3 family. the lrr domain is structurally similar to yersinia pestis yopm and potentially binds to substrates. the structure of the c-terminal e3 domain differs from the typical ring- and hect-type e3s. ipah3 synthesizes a lys48-link ... | 2008 | 18997779 |
| a pilot sheds light on secretin assembly. | 2008 | 18940600 | |
| structural characterization of the type-iii pilot-secretin complex from shigella flexneri. | assembly of the type-iii secretion apparatus, which translocates proteins through both membranes of gram-negative bacterial pathogens into host cells, requires the formation of an integral outer-membrane secretin ring. typically, a small lipidated pilot protein is necessary for the stabilization and localization of this ring. using nmr spectroscopy, we demonstrate that the c-terminal residues 553-570 of the shigella flexneri secretin mxid encompass the minimal binding domain for its cognate pilo ... | 2008 | 18940609 |
| antimicrobial activity of endemic crataegus tanacetifolia (lam.) pers and observation of the inhibition effect on bacterial cells. | up to now an increasing number of antibiotic-resistant bacteria have been reported and thus new natural therapeutic agents are needed in order to eradicate these pathogens. through the discovery of plants such as crataegus tanacetifolia (lam.) pers that have antimicrobial activity, it will be possible to discover new natural drugs serving as chemotherapeutic agents for the treatment of nosocomial pathogens and take these antibiotic-resistant bacteria under control. the objective of the present s ... | 2008 | 18946875 |
| detection of protozoan and bacterial pathogens of public health importance in faeces of corvus spp. (large-billed crow). | parasites and bacteria are reported in the faeces of birds in the current study. fresh faecal samples of the large-billed crow (corvus spp.) were collected from the study site at bangsar, an urban setting in kuala lumpur, malaysia. these samples were transported to laboratory and analysed for parasites and bacteria. pre-prepared xld agar plates were used for culturing the bacteria in the laboratory. using the api 20etm test strips, 9 different species of bacteria were identified belonging to the ... | 2008 | 18948884 |
| analysis of immune responses and serological cross reactivities among vibrio cholerae o1, shigella flexneri 2a and haemophilus influenzae b. | antigenic determinants expressed on the bacterial cell surface are of importance in the serological characterization and microbiological diagnosis. the bacterial strains carrying these identical or similar antigenic epitopes might react with antibodies produced against other strains. in this study, strong immunogenicity and antigenic cross reactivity were demonstrated among v. cholerae o1, s. flexnerii 2a and h. influenzae b surface components. the enzyme linked immunosorbent assay (elisa) resul ... | 2008 | 18954564 |
| the elucidation of the structure of the core part of the lps from plesiomonas shigelloides serotype o17 expressing o-polysaccharide chain identical to the shigella sonnei o-chain. | plesiomonas shigelloides o17 lps contains the same o-antigenic polysaccharide chain as a causative agent of dysentery, shigella sonnei. this polysaccharide can be used as a component of a vaccine against dysentery. core part of the p. shigelloides o17 lps was studied using nmr and mass spectrometry and the following structure was proposed: [structure : see text]. significant similarity of the p. shigelloides o17 lps core with the structure of the p. shigelloides o54 core was observed. | 2008 | 18954864 |
| evaluation by real-time pcr of the expression of s. flexneri virulence-associated genes ospb and phon2 under different genetical backgrounds. | under conditions of activated type iii secretion shigella flexneri up-regulates the expression of numerous genes, including the virulence plasmid (pinv)-encoded ospb and phon2 genes. ospb and phon2 are virulence-associated genes which are part of a bicistronic transcriptional unit encoding ospb, a protein (effector) of unknown function secreted by the type iii secretion (tts) apparatus, and phon2 (apyrase or atp-diphosphohydrolase), a periplasmic protein involved in polar icsa localization on th ... | 2008 | 18831939 |
| in this issue: proteomics 20/2008. | in this issue of proteomics you will find the following highlighted articles:comprehensively confirmed annotation of short orfsduring the california gold rush, prospectors did not look only for large nuggets to pave their road to riches - they also collected gold dust. the proteomic equivalent of dust is the small orf. it does not pay to put a lower limit on dust or orf size because almost any size may be turned into "cash" or an important peptide. wei et al. demonstrate how a combination of con ... | 2008 | 18924177 |
| closing the diarrhoea diagnostic gap in indian children by the application of molecular techniques. | a large proportion of diarrhoeal illnesses in children in developing countries are ascribed to an unknown aetiology because the only available methods, such as microscopy and culture, have low sensitivity. this study was aimed at decreasing the diagnostic gap in diarrhoeal disease by the application of molecular techniques. faecal samples from 158 children with and 99 children without diarrhoea in a hospital in south india were tested for enteric pathogens using conventional diagnostic methods ( ... | 2008 | 18927413 |
| porin-incorporated liposome induces toll-like receptors 2- and 6-dependent maturation and type 1 response of dendritic cell. | porin of shigella dysenteriae was incorporated in liposome (pil) and presented to mouse splenic dendritic cells (dc). pil up-regulated toll-like receptor (tlr) 2 and tlr6 on dc, showing that co-expression of the two tlrs is involved in recognition of porin. detection of myeloid differentiating factor 88 (myd88)-tlr2 complex confirmed interaction between the two for triggering the downstream signaling, which ultimately led to tlr2-dependent nuclear translocation of nuclear factor-kappa b. pil-ind ... | 2008 | 18931363 |
| [the distribution and antimicrobial resistance tendency of pathogens associated with diarrhea in beijing]. | to monitor the constituents and resistant tendency of bacterial pathogens isolated from diarrheal patients in our hospital form 1994 to 2005 to offer the basis for guiding epidemiologic study, vaccination research and clinical treatment. | 2008 | 18843955 |
| [analysis of pulsed-field gel electrophoresis molecular subtyping of shigella strains in shenzhen]. | to analyze the genetic relations of shigella isolated from shenzhen in 2001-2006 and develop primary molecular subtyping surveillance network of shigella. | 2008 | 18844079 |
| [analysis on incidence of bacillary dysentery in jinan municipality from 1951 to 2005]. | to explore the epidemic characteristics of bacterial dysentery in jinan municipality, and to provide scientific basis for effective strategy for bacterial dysentery control. | 2008 | 18844085 |
| prevention of the cytopathic effect induced by clostridium difficile toxin b by active rac1. | clostridium difficile toxin b (tcdb) glucosylates low molecular weight gtp-binding proteins of the rho subfamily and thereby causes actin re-organization (cell rounding). this "cytopathic effect" has been generally attributed to rhoa inactivation. here we show that cells expressing non-glucosylatable rac1-q61l are protected from the cytopathic effect of tcdb. in contrast, cells expressing rhoa-q63l or mock-transfected cells are fully susceptible for the cytopathic effect of tcdb. these findings ... | 2008 | 18848548 |
| [new selective indicator medium for detection of aeromonas and plesiomonas: unisc agar]. | we evaluated a new selective indicator medium (unisc agar) for isolation of classical enteropathogens, aeromonas spp and plesiomonas shigelloides. the xylose fermentation capacity is indicated by a yellow color (fermenting agents) or blue (no fermenting agent). this, together with the oxidase test, establishes it as an indicator for detecting aeromonas and plesiomonas shigelloides. its productivity and selectivity, as assessed using the absolute count index and relative count index, indicate it ... | 2008 | 18853024 |
| [htpg protein of shigella flexneri 2a strain 2457t evokes inflammatory response in mice]. | to analyze the function of htpg of s. flexneri 2a 2457t, we constructed an htpg deletion mutant and a recovery mutant. | 2008 | 18837368 |
| [detection of staphylococcus aureus, shigella spp., salmonella spp. in food by multiplex pcr]. | to establish a multiplex pcr method for simultaneous detection of staphylococcus aureus, shigella spp., salmonella spp. in food. | 2008 | 18839528 |
| 'form variation' of the o12 antigen is critical for persistence of salmonella typhimurium in the murine intestine. | salmonella enterica subspecies i serotypes are responsible for the vast majority of salmonellosis in mammals and birds, yet only a few factors specific to this group that allow them to persist in this niche have been identified. we show that stm0557, a s. enterica subspecies i-specific gene encoding an inner membrane protein, is critical for faecal shedding and intestinal persistence of s. enterica serotype typhimurium atcc14028 in salmonella-resistant mice, but mutations in this gene do not dim ... | 2008 | 18826410 |
| bacteriophage 2851 is a prototype phage for dissemination of the shiga toxin variant gene 2c in escherichia coli o157:h7. | the production of shiga toxin (stx) (verocytotoxin) is a major virulence factor of escherichia coli o157:h7 strains (shiga toxin-producing e. coli [stec] o157). two types of shiga toxins, designated stx1 and stx2, are produced in stec o157. variants of the stx2 type (stx2, stx2c) are associated with high virulences of these strains for humans. a bacteriophage designated 2851 from a human stec o157 encoding the stx2c variant was described previously. nucleotide sequence analysis of the phage 2851 ... | 2008 | 18824528 |
| evaluation of methods for isolation of dna for polymerase chain reaction (pcr)-based identification of pathogenic bacteria from pure cultures and water samples. | polymerase chain reaction (pcr) provides a reliable detection of pathogenic bacteria in water samples. however, this method can be adversely influenced by the purity of the dna template. this is a particularly important obstacle when the bacterial dna is directly extracted from water samples. in this study we compared the suitability of 8 different methods for isolation of bacterial dna from pure cultures and 10 different methods for isolation of dna from water samples. the quality of extracted ... | 2008 | 18824796 |
| molecular approach and bacterial quality of drinking water of urban and rural communities in egypt. | water is necessary to life so when supplied as drinking water to consumers, a satisfactory quality must be maintained. in egypt, infectious intestinal diseases are the major cause of hospitalization in almost all regions. the purpose of this study was to evaluate the microbiological quality of treated and untreated water samples from urban and rural communities. thirty-five samples of treated (chlorinated) water from taps, 25 samples of bottled water and 15 samples of hand pump (untreated) water ... | 2008 | 18800596 |
| incidence of bacterial enteropathogens among hospitalized diarrhea patients from orissa, india. | bacteriological analysis of 1,551 stool/rectal swabs from all age groups of diarrhea patients of different hospitals of orissa from january 2004 to december 2006 was carried out using standard procedures. among all enteropathogens isolated in 886 culture-positive samples, escherichia coli constituted 75.5%, including 13.2% pathogenic e. coli; vibrio cholerae o1 constituted 17.3%; v. cholerae o139, 1%; shigella spp., 4.5% (shigella flexneri type 6, 2.9%, s. dysenteriae type i, 0.7%, s. sonnei, 0. ... | 2008 | 18806340 |
| indications and challenges of probiotics, prebiotics, and synbiotics in the management of arthralgias and spondyloarthropathies in inflammatory bowel disease. | arthralgia and spondyloarthropathy of the peripheral and the axial joints are common in patients with inflammatory bowel diseases. evidence for this association has been provided by clinical, epidemiologic, and immunologic studies confirming the presence of shared inflammatory pathways in gut and joint. bacterial gut infections such as salmonella typhimurium, yersinia enterocolitica, shigella, campylobacter jejuni may induce reactive peripheral arthritis and 20% of these patients may develop chr ... | 2008 | 18806706 |
| [dysentery and amoebiasis in poland in 2006]. | the number of notified as shigellosis, bacillary dysentery cases in the three last years (2004, 2005, 2006) is lower and lower and is the lowest of all years since 1918 when notification started. only 35 cases were notified in the year 2006, while 80 were notified in 2005 (incidence rate 0.21/100 000 population), and 74 cases in 2004 (incidence rate 0.19/100 000 population). no one-death case was notified. the last three death cases were notified in 1999. no one outbreak was registered. twelve c ... | 2008 | 18807468 |
| [treatment of recurrent clostridium difficile-associated diarrhoea with a suspension of donor faeces]. | to study the effect of treating recurrent clostridium difficile-associated diarrhoea (cdad) with a suspension of donor faeces. | 2008 | 18808083 |
| [glycosphingolipids gb3 and igb3. in vivo roles in hemolytic-uremic syndrome and inkt cell function]. | the glycosphingolipids globotrihexosylceramide (gb3, cd77) and isoglobotrihexosylceramide (igb3) are isomers differing only in one glycosidic bond and have been implicated in several processes of the innate and adaptive immune system. | 2008 | 18810447 |
| mechanisms of infectious diarrhea. | infectious diarrhea is an important public health problem worldwide. research has provided new insights into the mechanisms of diarrhea caused by various pathogens that are classified as noninflammatory, inflammatory or invasive. these three groups of organisms cause two diarrheal syndromes--noninflammatory diarrhea and inflammatory diarrhea. the noninflammatory diarrheas are caused by enterotoxin-producing organisms such as vibrio cholerae and enterotoxigenic escherichia coli, or by viruses tha ... | 2008 | 18813221 |
| subproteomic tools to increase genome annotation complexity. | comprehensive and precise annotations of short protein-coding genes are always a challenging task. here we propose a new design to facilitate the characterization of previously overlooked short protein-coding genes by integrating a shotgun proteomics method and oligonucleotide array analysis. using shigella flexneri as a model, we validate 163 annotated orfs and 51 hypothetical or putative transcripts at the protein level, and discover four novel short orfs. this strategy will contribute signifi ... | 2008 | 18814329 |
| inhibitory effects of sage extract on the growth of enteric bacteria. | antibacterial activity of sage extract at concentrations of 0.1, 0.05, 0.025, 0.0125, 0.00625, 0.003125, 0.00156, 0.0005 and 0.00025 g dl(-1) against salmonella typhi, shigella sonnei, s. flexneri, proteus vulgaris, staphylococcus aureus, etec escherichia coli and pseudomonas aeruginosa was evaluated. susceptibility testing of bacterial strains against 18 antibiotics was also performed for comparison. the results showed that p. aeruginosa and etec e. coli were completely resistant to sage extrac ... | 2008 | 18817180 |
| [rotaviruses in younger children in novosibirsk in 2005-2007: detection and genotyping]. | examination of 1898 patients with acute enteric infection from march 2005 to february 2007 showed that group a rotaviruses were the most frequent cause (35%) of acute gastroenteritis among children under 3 years of age. majority of cases of rotavirus infection was detected in infants under 1 year of age (71.8%). the peak of sporadic incidence was observed between february and may. high rate of mixed infection (45.6%) was observed - associations of rotaviruses with other viruses (noroviruses, ast ... | 2008 | 18819400 |
| structural and functional studies indicate that shigella vira is not a protease and does not directly destabilize microtubules. | vira, an essential virulence factor in shigella disease pathogenesis, is involved in the uptake, motility, and cell-to-cell spread of shigella organisms within the human host. these functions have been attributed to a vira protease activity and a mechanism of microtubule destruction via tubulin degradation [yoshida, s., et al. (2006) science 314, 985-989]. we report functional and crystallographic data indicating a novel vira structure that lacks these activities but highlights the homology to t ... | 2008 | 18763811 |
| bacterial conjugation in the cytoplasm of mouse cells. | intracellular pathogenic organisms such as salmonellae and shigellae are able to evade the effects of many antibiotics because the drugs are not able to penetrate the plasma membrane. in addition, these bacteria may be able to transfer genes within cells while protected from the action of drugs. the primary mode by which virulence and antibiotic resistance genes are spread is bacterial conjugation. salmonellae have been shown to be competent for conjugation in the vacuoles of cultured mammalian ... | 2008 | 18765719 |
| shigellosis in puducherry. | 2008 | 18765885 | |
| gateways to clinical trials. | 11d10, 9vpnc-mncc; adalimumab, adefovir dipivoxil, alefacept, aln-rsv01, ame-133, amg-317, aminolevulinic acid methyl ester, amlodipine besylate/atorvastatin calcium, anisodamine, anti-il-5 receptor antibody, apremilast, aripiprazole, atacicept, atazanavir sulfate, atrasentan; banoxantrone, bevacizumab, bibw-2992, binodenoson, bms-387032; cac10, caldaret hydrate, cd-np, ceftobiprole medocaril, celivarone fumarate, certolizumab pegol, cholesteryl hydrophobized polysaccharide-her2 protein complex, ... | 2008 | 18773127 |
| novel cassette arrays of integrons in clinical strains of enterobacteriaceae in china. | one hundred and forty-two enterobacteriaceae isolates randomly selected from four general hospitals in nanjing region of china were investigated for antibiotic susceptibility, the presence of integrons and the characterisation of gene cassettes. eighty-five (59.9%) enterobacteriaceae strains contained class 1 integrons, and 17 (65.4%) of 26 shigella contained class 2 integrons. class 3 integrons were not detected in this study. restriction fragment length polymorphism (rflp) and dna sequencing a ... | 2008 | 18778917 |
| novel fold of vira, a type iii secretion system effector protein from shigella flexneri. | vira, a secreted effector protein from shigella sp., has been shown to be necessary for its virulence. it was also reported that vira might be related to papain-like cysteine proteases and cleave alpha-tubulin, thus facilitating intracellular spreading. we have now determined the crystal structure of vira at 3.0 a resolution. the shape of the molecule resembles the letter "v," with the residues in the n-terminal third of the 45-kda molecule (some of which are disordered) forming one clearly iden ... | 2008 | 18787201 |
| [molecular typing of isolates from two dysentery outbreaks in chengdu, through pulsed field gel electrophoresis technology]. | using pulsed field gel electrophoresis (pfge) and polymerase chain reaction (pcr) typing to analyze strains isolated from two outbreaks caused by shigella sonnei and to trace the source of infection. | 2008 | 18788530 |
| the roles of two-component systems in virulence of pathogenic escherichia coli and shigella spp. | two-component systems (tcss) are well conserved among e. coli strains, including pathogenic e. coli and also closely related shigella spp. although 25% of the genome of pathogenic e. coli is strain-specific, only small number of strain-specific tcss is found. regulation of virulence genes in response to environmental stimuli is partly dependent on tcss commonly present in nonpathogenic e. coli strains. some virulence genes are directly regulated by response regulator oftcs but some are affected ... | 2008 | 18792690 |
| safety and immunogenicity of wrsd1, a live attenuated shigella dysenteriae type 1 vaccine candidate. | among shigella serotypes shigella dysenteriae type 1 produces the most severe disease, including cases of hemolytic-uremic syndrome and pandemic outbreaks. wrsd1 is a live s. dysenteriae 1 strain attenuated by deletion of the virg(icsa) gene, which encodes a protein that mediates intercellular spread, and stxa and stxb, which encode the shiga toxin. in this phase i trial five groups of eight subjects ingested escalating doses of wrsd1 ranging from 10(3) to 10(7)cfu. no subject experienced fever ... | 2008 | 18468742 |
| occurrence and characteristics of the cytolysin a gene in shigella strains and other members of the family enterobacteriaceae. | cytolysin a (clya, hlye, shea) is a hemolytic pore-forming toxin found in escherichia coli and salmonella enterica serovars typhi and paratyphi a. in the present study, analysis of several shigella strains revealed that they harbor only nonfunctional clya gene copies that have been inactivated either by the integration of insertion sequence (is) elements (shigella dysenteriae, shigella boydii, and shigella sonnei strains) or by a frameshift mutation (shigella flexneri). shigella dysenteriae and ... | 2008 | 18754791 |
| characterization of endemic shigella boydii strains isolated in iran by serotyping, antimicrobial resistance, plasmid profile, ribotyping and pulsed-field gel electrophoresis. | shigellosis is one of the major causes of morbidity in children with diarrhea in iran. the present study was undertaken to characterize apparently sporadic shigella boydii strains isolated from pediatric patients in iran. | 2008 | 18755045 |
| topology and identification of critical residues of the o-acetyltransferase of serotype-converting bacteriophage, sf6, of shigella flexneri. | the modification of the lps o-antigen, seen in the diverse serotypes of shigella flexneri is brought about by the glucosyltransferases (gtr) and the o-acetyltransferase (oac). in this study, we establish the membrane topology of oac using the dual reporter phoa-laczalpha. we have determined that oac is an integral membrane protein with 10 transmembrane regions. the hydrophilic n- and c-termini are oriented in the cytoplasm. functionally important cytoplasmic and periplasmic loops have also been ... | 2008 | 18755141 |
| methods and tools for comparative genomics of foodborne pathogens. | a comparison of genome sequences and of encoded proteins with the database of existing annotated sequences is a useful approach to understand the information at the genome level. here we demonstrate the utility of several dna and protein sequence comparison tools to interpret the information obtained from several genome projects. comparisons are presented between closely related strains of escherichia coli commensal isolates, different isolates of o157:h7, and shigella spp. it is expected that c ... | 2008 | 18713064 |
| all blood, no stool: enterohemorrhagic escherichia coli o157:h7 infection. | enterohemorrhagic escherichia coli serotype o157:h7 is a pathotype of diarrheagenic e. coli that produces one or more shiga toxins, forms a characteristic histopathology described as attaching and effacing lesions, and possesses the large virulence plasmid po157. the bacterium is recognized worldwide, especially in developed countries, as an emerging food-borne bacterial pathogen, which causes disease in humans and in some animals. healthy cattle are the principal and natural reservoir of e. col ... | 2008 | 18716441 |