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characterization of a type iv bundle-forming pilus (sfp) from a gastroenteritis-associated strain of aeromonas veronii biovar sobria.the colonization mechanisms of enteropathogenic aeromonas strains are poorly characterized, but recent studies indicate that some filamentous structures are intestinal adhesins. this study describes the purification and characterization of a long, flexible pilus from a gastroenteritis-associated strain of aeromonas veronii biovar sobria. sds-page analysis (various conditions) of pili preparations yielded a pilin protein band of approximately 21 kda. its n-terminal amino acid sequence was unambig ...19968827704
first documented case of aeromonas veronii biovar sobria infection in northern europe.the first scandinavian case of aeromonas veronii biovar sobria infection, an episode of peritonitis in a patient suffering from a cirrhotic liver and an earlier unrecognized appendiceal cancer, is described.200212030401
aerolysin is activated by metalloprotease in aeromonas veronii biovar sobria.aeromonas veronii is an opportunistic human pathogen that causes diarrhoea and extraintestinal infections, such as wound infection and septicaemia. an a. veronii protease (avp) from a biovar sobria strain, aeg1, was partially purified and characterized. mature avp hydrolysed casein but not elastin, and protease activity was inhibited by metalloprotease inhibitors. nucleotide sequence analysis showed that avp belongs to the thermolysin family of proteases. an avp-deficient mutant was constructed ...200415150325
bulgecin a: a novel inhibitor of binuclear metallo-beta-lactamases.bulgecin a, a sulphonated n-acetyl-d-glucosamine unit linked to a 4-hydroxy-5-hydroxymethylproline ring by a beta-glycosidic linkage, is a novel type of inhibitor for binuclear metallo-beta-lactamases. using steady-state kinetic analysis with nitrocefin as the beta-lactam substrate, bulgecin a competitively inhibited the metallo-beta-lactamase bceii from bacillus cereus in its two-zinc form, but failed to inhibit when the enzyme was in the single-zinc form. the competitive inhibition was restore ...200515569001
[aeromonas associated with an acute diarrhea outbreak in são bento do una, pernambuco].an acute diarrhea outbreak, with 2170 cases, was described during january to july, 2004, in são bento do una, pernambuco. 582 stools were examined and an enteric pathogen was recovered in 25% (145 patients). aeromonas species were the most frequent (114-19.5%) and the main isolates were aeromonas caviae (57-9.8%), aeromonas veronii biovar sobria (23-3.9%), aeromonas veronii biovar veronii (15-2.6%) and other species (19-3.2%). the other isolated enteropathogens were vibrio cholerae o1-ogawa toxi ...200616699653
segmental ascending colitis associated with aeromonas veronii biovar sobria. 200616732806
the usefulness of molecular techniques to assess the presence of aeromonas spp. harboring virulence markers in foods.a total of 78 raw and 123 processed and ready-to-eat retail food samples were used to assess the presence of motile aeromonas spp. harboring virulence genes (cytotoxic enterotoxin and hemolysin genes) using a recently described pcr method in comparison with the conventional cultivation method based on the use of ampicillin-dextrin agar (ada) medium. with the ada-based method, 65/201 (32.3%) samples showed presumptive aeromonas spp. colonies whereas the pcr method revealed the presence of aeromon ...200415193799
[postoperative infection of an epigastric hematoma caused by aeromonas veronii biovar sobria].a 52-year-old man with a gastric signet-ring cell carcinoma but without acute symptoms was admitted for reconstructive surgery of the gastrointestinal tract.200617109273
prevalence, serotype distribution, antibiotic susceptibility and genetic profiles of mesophilic aeromonas species isolated from hospitalized diarrhoeal cases in kolkata, india.a comprehensive study was performed to examine incidence, species distribution, drugs sensitivity, virulence genes and molecular fingerprints of aeromonas species isolated from patients with acute diarrhoea over a period of 2 years in kolkata, india. following the aerokey ii scheme, more than 95 % of strains were identified to species level. seven different species were encountered in this study, with aeromonas caviae being dominant, followed by aeromonas hydrophila and aeromonas veronii biovar ...200415150333
induction of apoptosis in vero cells by aeromonas veronii biovar sobria vacuolating cytotoxic factor.recently, a cytotoxin named vacuolating cytotoxic factor (vcf) in aeromonas sobria and aeromonas veronii biovar sobria was described. we have now purified this factor using ion metallic affinity chromatography. the vcf is a nonhemolytic enterotoxin that acts as a serine protease. the toxin can be partially neutralized by serum antiaerolysin and it induced not only cytoplasmatic vacuole formation, but also mitochondrial disorders that must be signaling the apoptotic pathways, leading to vero (afr ...200717286562
an aeromonas veronii biovar sobria infection with disseminated intravascular gas production.we report a case of aeromonas veronii biovar sobria infection with disseminated intravascular gas production. the patient was an afebrile 15-year-old girl who had been quite healthy until the onset of the illness. she came to the hospital because of a 6-h history of increasing pain and swelling in her left thigh. on admission, no infection was suspected, and a tentative diagnosis of a ruptured left gracilis muscle was made. because the pain increased continuously, the treatment concentrated on p ...200414991516
characterization of a catalase gene from aeromonas veronii, the digestive-tract symbiont of the medicinal leech.the catalase gene kata of the medicinal leech symbiont aeromonas veronii bv. sobria was cloned, sequenced, and functionally characterized. southern hybridization, using an a. veronii kata-specific hybridization probe, suggested the presence of a single gene copy in many aeromonas species. a. veronii kata consisted of 1446 nt encoding a protein with a high degree of similarity to the small-subunit group iii bacterial catalases. a catalase-null mutant (jg186) was constructed through gene-replaceme ...200717526846
hemolytic and proteolytic activities of aeromonas hydrophila and aeromonas veronii biovar sobria in broth and salmon extract at different temperatures.expression of hemolytic and proteolytic activities throughout the growth cycle was investigated with two enterotoxic aeromonad strains assigned to the species aeromonas hydrophila and aeromonas veronii biovar sobria. although growth kinetic data were dependent on strain, temperature, and substrate, maximum populations attained were higher than 9 log cfu/ml in aerated tryptone soya broth plus yeast extract (tsbye) and salmon extract within the range 4 to 28 degrees c. for both strains in tsbye, v ...200414968959
the role of c-di-gmp signaling in an aeromonas veronii biovar sobria strain.aeromonas is a ubiquitous gram-negative bacterium that persists in the environment. it is shown that all isolates of persistent aeromonas clones show strong biofilm formation ability. c-di-gmp regulates biofilm formation in many bacteria. to investigate the impact of c-di-gmp signaling, we introduced heterologous ggdef and eal domain proteins from salmonella typhimurium to an aeromonas veronii biovar sobria strain. overexpression of the ggdef domain protein adra increased c-di-gmp concentration ...200717573931
misidentification of aeromonas veronii biovar sobria as vibrio alginolyticus by the vitek system.to find the cause of misidentification of aeromonads when using the vitek system.200312969502
aeromonas veronii biovar veronii septicaemia and acute suppurative cholangitis in a patient with hepatitis b.gram-negative bacilli of the genus aeromonas are widespread in aquatic environments and can be responsible for human infections. although aeromonas extraintestinal and systemic infections have been reported with growing frequency in recent years, aeromonas septicaemia remains an uncommon finding, often associated with serious underlying disease and predominantly related to the species aeromonas hydrophila, aeromonas veronii biovar sobria and aeromonas caviae. here, a case of a. veronii biovar ve ...200312867570
aeromonas-acanthamoeba interaction and early shift to a viable but nonculturable state of aeromonas by acanthamoeba.to investigate the hypothesis that amoeba may comprise a significant environmental reservoir for aeromonas, acanthamoeba-aeromonas interaction experiments were performed.200818194253
complement resistance is essential for colonization of the digestive tract of hirudo medicinalis by aeromonas strains.from the crop of the medicinal leech, hirudo medicinalis, only aeromonas veronii bv. sobria can be cultured consistently. serum-sensitive a. veronii mutants were unable to colonize h. medicinalis, indicating the importance of the mammalian complement system for this unusual simplicity. complementation of one selected mutant restored its ability to colonize. serum-sensitive mutants are the first mutant class with a colonization defect for this symbiosis.200312839811
genetic linkage of the penicillinase gene, amp, and blrab, encoding the regulator of beta-lactamase expression in aeromonas spp.aeromonas hydrophila t429125, a human clinical isolate, possesses three coordinately inducible beta-lactamases encoded by amph (class d beta-lactamase), ceph (class c beta-lactamase) and imih (class b beta-lactamase). we report that upstream of amph there are two genes, blra and blrb, encoding a putative two-component regulatory system. pcr studies revealed the same blrab-amp gene arrangement in all aeromonas spp. isolates tested; namely, aeromonas veronii bv. sobria, aeromonas jandaei, aeromona ...200312746371
virulence markers in aeromonas hydrophila and aeromonas veronii biovar sobria isolates from freshwater fish and from a diarrhoea case.to evaluate the public health significance of representative strains of two aeromonas spp., mainly from freshwater fish, on the basis of production of virulence-associated factors and presence of the haemolytic genes aera and hlya.200212174039
identification and characterization of pathogenic aeromonas veronii biovar sobria associated with epizootic ulcerative syndrome in fish in bangladesh.sparse information is available on the virulence factors of aeromonas strains isolated from diseased fish, from the environment, and from humans. in the present study, 52 aeromonas isolates obtained from epizootic ulcerative syndrome (eus) lesions in fish, from the aquatic environment, and from children with diarrhea in bangladesh were identified by biochemical phenotyping (i.e., pheneplate [php] typing) and dna fingerprinting and then characterized with respect to certain putative virulence fac ...200211823203
three cases of bacteraemia caused by aeromonas veronii biovar sobria.septicaemia caused by aeromonas species is a life-threatening condition, arising primarily in immunocompromised patients, which has rarely been reported in scandinavia. herein we describe 3 cases of aeromonas sobria bacteraemia from denmark. all the patients were male and all 3 cases occurred during the summer. two patients had acute leukaemia and hiv infection, respectively, while the third patient had colorectal cancer diagnosed several years later. the clinical presentation in all patients wa ...200111669236
mesophilic aeromonads in wild and aquacultured freshwater fish.numbers and species of motile aeromonas were determined in freshly caught freshwater fish, in the surrounding environment, and also during iced chilled storage of fish specimens. although no significant differences were observed in water samples, initial levels for skin, gill, and intestines were significantly lower in farmed rainbow trout (oncorhynchus mykiss) than in wild brown trout (salmo trutta) and pike (esox lucius). during storage of wild specimens, naturally occurring aeromonads grew fa ...200111348001
ingested blood contributes to the specificity of the symbiosis of aeromonas veronii biovar sobria and hirudo medicinalis, the medicinal leech.hirudo medicinalis, the medicinal leech, usually carries in its digestive tract a pure culture of aeromonas veronii bv. sobria. such specificity is unusual for digestive tracts that are normally colonized by a complex microbial consortium. important questions for the symbiotic interaction and for the medical application after microvascular surgery are whether other bacteria can proliferate or at least persist in the digestive tract of h. medicinalis and what factors contribute to the reported sp ...200011055917
identification of genes associated with copper tolerance in an adhesion-defective mutant of aeromonas veronii biovar sobria.tnphoa mutagenesis was used to identify adhesins of aeromonas veronii biovar sobria 3767, a strain isolated from a diarrhoeal stool specimen. six mutants, from a library of 154, exhibited significantly reduced levels of adhesion to hep-2 cells. primers to the terminal regions of tnphoa were used for inverse pcr and the product from one mutant was cloned into pbluescript and partial sequence data obtained. scanning genbank and embl data bases revealed dna sequence similarity to the copa gene of p ...200011024350
functional characterization of type iv pili expressed on diarrhea-associated isolates of aeromonas species.our past work has shown that long, flexible type iv pili (single or in bundles) are the predominant pili expressed on fecal isolates of diarrhea-associated species of aeromonas (aeromonas veronii biovar sobria and a. caviae). they represent a family of type iv pili which we have designated bfp (for bundle-forming pili). reports from japan suggest that bfp are intestinal colonization factors. this study presents compelling evidence to support this conclusion. aeromonas bacteria and/or bfp purifie ...199910496928
diverse restriction fragment length polymorphism patterns of the pcr-amplified 16s rrna genes in aeromonas veronii strains and possible misidentification of aeromonas species.restriction fragment length polymorphism analysis after pcr amplification (rflp-pcr) of the 16s rrna gene has been previously proposed as a rapid method to identify aeromonas species. in the present study, the precision of rflp-pcr was evaluated with 62 aeromonas reference strains. the analysis revealed that aeromonas veronii biovar sobria strains produce various patterns, possibly leading to its misidentification as an environmental species. for most other aeromonas species little variation was ...199910488176
the production of a novel carbapenem-hydrolysing beta-lactamase in aeromonas veronii biovar sobria, and its association with imipenem resistance. 199810052912
symbiosis of aeromonas veronii biovar sobria and hirudo medicinalis, the medicinal leech: a novel model for digestive tract associations.hirudo medicinalis, the medicinal leech, is applied postoperatively in modern medicine. infections by aeromonas occur in up to 20% of patients unless a preemptive antibiotic treatment is administered. the associated infections demonstrate the need for a better understanding of the digestive tract flora of h. medicinalis. early studies reported the presence of a single bacterial species in the digestive tract and suggested that these bacteria were endosymbionts contributing to the digestion of bl ...19999864188
[new species of aeromonas isolated in cuba].one hundred and fifty-five strains of aeromonas isolated in the stools of children under 5 years presenting with acute diarrheal disease were studied. using the aerokey ii system for the identification of species, 47 strains were identified as aeromonas caviae, 58 as aeromonas hydrophila, 23 as aeromonas veronii biovar sobria, 14 as aeromonas trota, 9 as aeromonas veronii biovar veronii, 2 as aeromonas jandaei and 2 as aeromonas shubertii, emphasis is placed on the advantages of this method whic ...19959813480
nucleotide and amino acid sequences of the metallo-beta-lactamase, imis, from aeromonas veronii bv. sobria.the aeromonas veronii bv. sobria metallo-beta-lactamase gene, imis, was cloned. the imis open reading frame extends for 762 bp and encodes a protein of 254 amino acids with a secreted modified protein of 227 amino acids and a predicted pi of 8.1. to confirm the predicted sequence, purified imis was digested and the resulting peptides were identified, yielding an identical sequence for imis, with 98% identity to cpha. both possessed the putative active-site sequence asn-tyr-his-thr-asp at positio ...19989527802
x-ray absorption spectroscopy of the zinc-binding sites in the class b2 metallo-beta-lactamase imis from aeromonas veronii bv. sobria.x-ray absorption spectroscopy was used to investigate the metal-binding sites of imis from aeromonas veronii bv. sobria in catalytically active (1-zn), product-inhibited (1-zn plus imipenem), and inactive (2-zn) forms. the first equivalent of zinc(ii) was found to bind to the consensus zn(2) site. the reaction of 1-zn imis with imipenem leads to a product-bound species, coordinated to zn via a carboxylate group. the inhibitory binding site of imis was examined by a comparison of wild-type imis w ...200617087519
prevalence of environmental aeromonas in south east queensland, australia: a study of their interactions with human monolayer caco-2 cells.to investigate the prevalence of aeromonas in a major waterway in south east queensland, australia, and their interactions with a gut epithelial model using caco-2 cells.200616968308
aeromonas veronii biovar sobria bacteraemia with septic arthritis confirmed by 16s rdna pcr in an immunocompetent adult.an 81-year-old man developed septic arthritis and bacteraemia with aeromonas veronii biovar sobria. cultures of the joint wash-out fluid were negative; however, dna matching that of aeromonas veronii was identified by 16s rdna pcr. the patient was successfully treated with a 4 week course of ciprofloxacin. no recognized risk factors were found.200616434719
spectroscopic studies on cobalt(ii)-substituted metallo-beta-lactamase imis from aeromonas veronii bv. sobria.in an effort to probe the structure of a group bb metallo-beta-lactamase, co(ii)-substituted imis was prepared and characterized by electronic absorption, nmr, and epr spectroscopies. imis containing 1 equiv of co(ii) (co(ii)(1)-imis) was shown to be catalytically active. electronic absorption studies of co(ii)(1)-imis revealed the presence of two distinct features: (1) an intense sulfur to co(ii) ligand to metal charge transfer band and (2) less intense, co(ii) ligand field transitions that sug ...200515794654
dietary zinc promotes immuno-biochemical plasticity and protects fish against multiple stresses.the abiotic and biotic stress is an episode that effect on regulatory, neuro-endocrine and immune systems of animals including fish. the stress creates stimulatory and suppressive of immune system resulting in increases the incidence of infection. in view of these points, we have conducted an experiment to mitigate the stress through a nutritional approach through zinc (zn) supplementation in pangasius hypophthalmus (initial weight-3.65 ± 0.75 g). three isocaloric and isonitrogenous diets with g ...201728108338
over-expression, purification, and characterization of metallo-beta-lactamase imis from aeromonas veronii bv. sobria.the gene from aeromonas veronii bv. sobria encoding the metallo-beta-lactamase imis was subcloned into pet-26b, and imis was over-expressed in bl21(de3) escherichia coli and purified using sp-sepharose chromatography. this protocol yielded over 5 mg of imis per liter of growth culture under optimum conditions. the biochemical properties of recombinant imis were compared with those of native imis. recombinant and native imis have the same n-terminus of a-g-m-s-l, and cd spectroscopy was used to s ...200415249050
spatial and temporal population dynamics of a naturally occurring two-species microbial community inside the digestive tract of the medicinal leech.the medicinal leech, hirudo verbana, is one of the simplest naturally occurring models for digestive-tract symbioses, where only two bacterial species, aeromonas veronii bv. sobria (gamma-proteobacteria) and a rikenella-like bacterium (bacteroidetes), colonize the crop, the largest compartment of the leech digestive tract. in this study, we investigated spatial and temporal changes of the localization and microcolony structure of the native symbionts in the crop, after ingestion of a sterile blo ...200717277211
detection and characterization of antimicrobial resistance and putative virulence genes in aeromonas veronii biovar sobria isolated from gilthead sea bream (sparus aurata l.).the purposes of this study were to investigate the antimicrobial resistance of aeromonas veronii biovar sobria isolated from gilthead sea bream and to characterize the virulence-implicated genes. fish samples (n=365) were collected from wholesale and retail markets in aljouf, saudi arabia between 2013 and 2014. a total of 45 a. veronii biovar sobria isolates (12.3%) from those samples were tested for resistance to a range of antimicrobial agents. all strains exhibited 100% resistances to nalidix ...201526218714
suicide plasmid-dependent is1-element untargeted integration into aeromonas veronii bv. sobria generates brown pigment-producing and spontaneous pelleting mutant.foodborne gram-negative pathogens belonging to the genus aeromonas are variable in harboring insertion sequence (is) elements that play an important role in the generation of dysfunctional relatives of known genes. using suicide plasmids carrying an is1-element, untargeted integration is a common problem during experimental trials to generate specific mutations by homologous recombination. in this work, different strains of aeromonas veronii bv. sobria (aeg1 and atcc 9071t), a. hydrophila atcc 1 ...201323436029
tissue distribution, expression, and antimicrobial activity of anas platyrhynchos avian β-defensin 6.in this study, a novel avian β-defensin (avbd) was isolated from the chaohu duck. the complete nucleotide sequence of the gene contained a 204-bp open reading frame that encoded 67 amino acids (aa), including a signal peptide of 20 aa, a propiece of 5 aa, and a mature peptide of 42 aa. the homology, characterization, and comparison of this gene with avbd from other avian species confirmed that it was duck avbd6. also, the preproprotein of avbd6 from chicken, goose, and duck was highly conserved ...201323243235
aeromonas hemolytic uremic syndrome. a case and a review of the literature.although rarely, hemolytic uremic syndrome can be induced by aeromonas. we report a case in a 40-year-old spanish female produced by aeromonas veronii bv. sobria and review the previous cases described in the literature. this is the 2nd case described in adults.200717300902
[isolation and identification of species from the genera aeromonas, vibrio, and plesiomonas from extraintestinal samples in cuba].extraintestinal infections caused by the genera aeromonas, vibrio and plesiomonas have high morbidity and mortality rates in different areas of world. from january 2002 to december 2003, the national reference laboratory for acute diarrhoeal diseases of the pedro kourí tropical medicine institute received 95 gram-negative, facultative anaerobic, oxidase positive bacilli strains from different extraintestinal specimen (blood, ear exudates, infected wounds, conjunctive exudates, urine, and cathete ...200717554439
tracheobronchitis caused by aeromonas veronii biovar sobria after near-drowning.a 19-year-old man developed an acute tracheobronchitis shortly after having been rescued from a near-drowning in a river where previous investigations had demonstrated the presence of 500 c.f.u. ml(-1) of aeromonas sp. in the water. an isolate of aeromonas veronii biovar sobria was identified as the causative agent of the tracheobronchitis. the causality was supported by the massive growth of a. veronii in bronchial secretion, the presence of a type iii secretion system in the bacterial isolate, ...200717965361
a distinct cause of necrotizing fasciitis: aeromonas veronii biovar sobria.aeromonas veronii biovar sobria (veronii var. sobria) has not been implicated in the pathogenesis of necrotizing fasciitis in north america.200717999586
severe diarrhoea caused by aeromonas veronii biovar sobria in a patient with metastasised gist.this report describes the isolation of aeromonas veronii biovar sobria as the causative enteropathogen of diarrhoea in an oncological patient after failure of detection of other infectious agents. the case points out the severe and long course of the infection, the diagnostic dilemma, and the prompt recovery after antibiotic treatment.200718254499
characterization of vibrio cholerae isolated from the aquatic basins of the state of pernambuco, brazil.through a continuous bacteriological monitoring programme carried out by the health secretariat of the state of pernambuco, brazil, two isolates of vibrio cholerae o1 el tor ogawa were discovered in an endemic area in 2001, during a cholera inactive period, along with six v. cholerae non-o1/non-o139 strains and two aeromonas veronii biovar sobria strains showing an unusual characteristic of agglutination with o1 antiserum. between that time and 2005, eight other o1 isolates were found. the virul ...200818258274
effect of packaging atmosphere on the microbial attributes of pearlspot (etroplus suratensis bloch) stored at 0-2 degrees c.effect of packaging atmosphere (air and under different modified atmospheres (mas), 40% co2/60% o2, 50%/50% o2, 60% co2/40% o2, 70% co2/30% o2 and 40% co2/30% o2/30% n2) on the microbial and biochemical attributes of fresh pearlspot (etroplus suratensis bloch) stored at 0-2 degrees c was investigated. trimethylamine nitrogen (tma-n) and thiobarbituric acid (tba) values remained lower than the proposed acceptability limits throughout the storage period. results demonstrated that storage of pearls ...200818355677
[severe pneumonia caused by aeromonas veronii biovar sobria: a case report and review of the literature].to describe the clinical features of severe pneumonitis with aeromonas veronii biovar sobria.200819080598
development of imipenem resistance in an aeromonas veronii biovar sobria clinical isolate recovered from a patient with cholangitis.several imipenem-susceptible and -resistant aeromonas veronii biovar sobria isolates with different morphologies and antimicrobial susceptibilities recovered from bile samples of a patient with cholangitis were analysed. these isolates belonged to the same clone and the imipenem-resistant strains showed overexpression of the imis gene, encoding a chromosomal carbapenemase. these results should make clinicians aware of the possible emergence of multidrug-resistant a. veronii biovar sobria, perhap ...200919273640
plasmid-mediated qnrs2 determinant in an aeromonas caviae isolate recovered from a patient with diarrhoea.a qnrs2 gene was identified in an aeromonas caviae isolate (mics of ciprofloxacin, norfloxacin and ofloxacin >32 mg/l) from a stool sample collected from a patient with gastroenteritis. the analysis of the gyra and parc genes revealed amino acid substitutions ser83-ile and ser80-thr, respectively. in addition, five out of 41 nalidixic acid-resistant aeromonas isolates studied (26 identified as aeromonas veronii bv sobria and 15 identified as a. caviae) showed ciprofloxacin resistance. the identi ...201019863591
molecular mechanisms of quinolone resistance in clinical isolates of aeromonas caviae and aeromonas veronii bv. sobria.mutations in quinolone targets were studied together with quinolone efflux pump activation and plasmid-mediated quinolone resistance determinants in nalidixic-acid-resistant isolates of aeromonas caviae and aeromonas veronii. among 135 clinical aeromonas spp. isolated from stools of patients with gastrointestinal symptoms, 40 nalidixic acid-resistant strains belonging to a. caviae and a. veronii were selected and their susceptibility to different quinolones (ciprofloxacin, norfloxacin, ofloxacin ...201020890847
complex evolutionary history of the aeromonas veronii group revealed by host interaction and dna sequence data.aeromonas veronii biovar sobria, aeromonas veronii biovar veronii, and aeromonas allosaccharophila are a closely related group of organisms, the aeromonas veronii group, that inhabit a wide range of host animals as a symbiont or pathogen. in this study, the ability of various strains to colonize the medicinal leech as a model for beneficial symbiosis and to kill wax worm larvae as a model for virulence was determined. isolates cultured from the leech out-competed other strains in the leech model ...201121359176
gastrointestinal colonization rates for human clinical isolates of aeromonas veronii using a mouse model.a variety of environment-associated gastrointestinal infections have been associated with the aeromonas group of bacteria which contain both non-virulent strains as well as virulent strains within a particular species. this study monitors the colonization rates of colon tissue in a mouse-streptomycin dose/response model involving isolates of aeromonas veronii biovar sobria obtained from human clinical specimens. the ability to successfully colonize mouse colon tissues by the human clinical isola ...201121779939
different clinical characteristics among aeromonas hydrophila, aeromonas veronii biovar sobria and aeromonas caviae monomicrobial bacteremia.this study aimed to compare the clinical presentations of aeromonas hydrophila, a. veronii biovar sobria and a. caviae monomicrobial bacteremia by a retrospective method at three hospitals in taiwan during an 8-yr period. there were 87 patients with a. hydrophila bacteremia, 45 with a. veronii biovar sobria bacteremia and 22 with a. caviae bacteremia. compared with a. hydrophila and a. veronii biovar sobria bacteremia, a. caviae bacteremia was more healthcare-associated (45 vs 30 and 16%; p = 0. ...201122065896
recombinant aexu effector protein of aeromonas veronii bv. sobria disrupts the actin cytoskeleton by downregulation of rac1 and induces direct cytotoxicity to β4-integrin expressing cell lines.aexu is a type three secretion system (ttss) effector of aeromonas hydrophila which has an in vitro adp-ribosyltransferase (art) and gtpase-activating protein (gap) activities on rac1, rhoa and cdc42. here we show that, aexu of aeromonas veronii bv. sobria aeg1 strain disrupts actin cytoskeleton of hela cells during aeg1 infection, aexu transfection or direct application of aexu protein. such cellular disruption was rescued by either inactivation of aexu-gap activity by substitution of arginine ...201121963679
aeromonas and plesiomonas species from scarlet ibis (eudocimus ruber) and their environment: monitoring antimicrobial susceptibility and virulence.the present study aimed at evaluating the role of captive scarlet ibises (eudocimus ruber) and their environment as reservoirs of aeromonas spp. and plesiomonas spp., and analyzing the in vitro antimicrobial susceptibility and virulence of the recovered bacterial isolates. thus, non-lactose and weak-lactose fermenting, oxidase positive gram-negative bacilli were recovered from cloacal samples (n = 30) of scarlet ibises kept in a conservational facility and from water samples (n = 30) from their ...201727885558
infections following the application of leeches: two case reports and review of the literature. 201223098279
aeromonas sobria necrotizing fasciitis and sepsis in an immunocompromised patient: a case report and review of the literature.aeromonas veronii biovar sobria is a rare cause of bacteremia, with several studies indicating that this isolate may be of particular clinical significance since it is enterotoxin producing. a wide spectrum of infections has been associated with aeromonas species in developing countries that include gastroenteritis, wound infections, septicemia and lung infections. this infection, caused by aeromonas species, is usually more severe in immunocompromised than immunocompetent individuals. we here d ...201425245365
n-acyl homoserine lactone-mediated quorum sensing in aeromonas veronii biovar sobria strain 159: identification of luxri homologs. 201626909339
identification and virulence properties of aeromonas veronii bv. sobria isolates causing an ulcerative syndrome of loach misgurnus anguillicaudatus. 201626525163
a severe case of aeromonas veronii biovar sobria travellers' diarrhoea characterized by vibrio parahaemolyticus co-isolation.we report a severe case of travellers' diarrhoea in a patient returning from ecuador to italy with the concomitant presence of aeromonas veronii biovar sobria and vibrio parahaemolyticus in their faeces. based on diagnostic results, epidemiological information and the clinical outcome, we conclude that the real aetiological agent was a. veronii biovar sobria, while v. parahaemolyticus was only transient in the intestine of the patient.201323002063
structural analysis of the o-specific polysaccharide from the lipopolysaccharide of aeromonas veronii bv. sobria strain k49.the o-specific polysaccharide obtained by mild-acid degradation of the lipopolysaccharide from aeromonas veronii bv. sobria strain k49 was studied by sugar and methylation analyses along with (1)h and (13)c nmr spectroscopy. the sequence of the sugar residues was determined using (1)h,(1)h noesy and (1)h,(13)c hmbc experiments. the o-specific polysaccharide was found to be a high molecular mass polysaccharide composed of repeating units of the structure: →2)-β-d-quip3nac-(1→3)-α-l-rhap-(1→3)-α-l ...201222483338
aeromonas caviae is the most frequent pathogen amongst cases of aeromonas bacteremia in japan.aeromonas species can cause various infections including bacteremia, gastroenteritis, cholangitis, and wound infections. to date, most studies on aeromonas species have been reported from countries other than japan. the aim of this study, therefore, was to evaluate aeromonas bacteremia in japan.201323163893
speciation, clinical profile & antibiotic resistance in aeromonas species isolated from cholera-like illnesses in a tertiary care hospital in north india.aeromonas species have been reported to cause various illnesses in humans such as wound infections, septicaemia, peritonitis and pneumonia. their role in causation of cholera-like illness is also being increasingly recognized. this retrospective study was done to know the presence of aeromonas as a cause of acute diarrhoea in a tertiary care hospital and to find the common species of aeromonas causing diarrhoea and their antibiotic susceptibility patterns.201729205196
isolation and characterization of a novel, t7-like phage against aeromonas veronii.a virulent aeromonas veronii biovar sobria and the corresponding novel, lytic bacteriophage (vtccbpa5) were isolated from village pond water. the phage was found to belong to family podoviridae. pcr analysis of major capsid protein gene confirmed its classification to t7-like genus. the protein profiling by sds-page indicated the major structural protein to be ~ 45 kda. the phage (vtccbpa5) is host specific and is stable over a range of ph (6-10) and temperatures (4-45 °c). on the basis of restr ...201729116575
virulence and antimicrobial susceptibility of clinical and environmental strains of aeromonas spp. from northeastern brazil.the aims of the present study were to isolate and identify clinical and environmental strains of aeromonas spp. by means of biochemical tests and the automated method vitek 2 and to investigate the presence of the virulence genes cytotoxic enterotoxin (act), hemolysin (asa-1), and type iii secretion system (ascv), and also the in vitro antimicrobial susceptibility of the strains. from the clinical isolates, 19 aeromonas hydrophila, 3 aeromonas veronii bv. sobria, and 1 aeromonas caviae were iden ...201526103449
comparative analysis of virulence genes, antibiotic resistance and gyrb-based phylogeny of motile aeromonas species isolates from nile tilapia and domestic fowl.the nucleotide sequence analysis of the gyrb gene indicated that the fish aeromonas spp. isolates could be identified as aeromonas hydrophila and aeromonas veronii biovar sobria, whereas chicken aeromonas spp. isolates identified as aeromonas caviae. pcr data revealed the presence of lip, ser, aer, act and cai genes in fish aer. hydrophila isolates, act, cai and aer genes in fish aer. veronii bv sobria isolates and ser and cai genes in chicken aer. caviae isolates. all chicken isolates showed va ...201526280543
[infection status and virulent genes of aeromonas in diarrhea patients in pudong new area, shanghai].to investigate the infection status and virulent genes of aeromonas in patients with acute diarrhea in pudong new area, shanghai.201627005546
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