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13 resultados
Incidence and virulence of Aeromonas species in feces of children with diarrhea.
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Aeromonas spp. occurring in feces of children with diarrhea were studied. Forty-eight strains were isolated from 2,025 specimens during a one year period. Only 11 of 44 strains tested yielded virulence factors (cytotoxin, hemolysin and hemagglutinin). Six strains were identified as Aeromonas sobria
[Diagnosis of entero-invasive Escherichia coli associated with diarrhea].
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Sixteen Escherichia coli strains isolated from diarrhea patients, characterized as enteroinvasive (EIEC) by the keratoconjunctivitis test (Sereny test), and 15 non-EIEC strains, were studied. The aim of this study was to establish a possible correlation between the Sereny test and several other
Characteristics of Yersinia enterocolitica isolated from children with diarrhea in Italy.
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Of 2,500 fecal samples collected from children with diarrhea in the province of Siena, 35 (1.4%) were found to be positive for Yersinia enterocolitica. Of the isolates, 94.2% belonged to biotype 4, serotype 0:3; 2.8% belonged to biotype 2, serotype O:9; and 2.8% belonged to biotype 1, serotype O:6.
[Phenotypic characteristics of 100 strains belonging to the mesophilic aeromonas group isolated from feces].
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Phenotypic characteristics of 100 strains pertaining to the group of mesophilic aeromonas isolated in feces of patients with diarrhea (23 A. hydrophila, 34 A. sobria, 19 A. caviae, and 24 considered atypical because produced a the negative esculin reaction and a positive gas formation from glucose
Biotyping and virulence factors in clinical and environmental isolates of Aeromonas species.
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Biochemical characteristics and virulence factors were compared in 147 Aeromonas spp. isolated from patients with diarrhea and in 94 strains isolated from metropolitan water supplies in the same area during the same period. Fermentation of arabinose occurred with 58.5% of the environmental strains
Prevalence and Characterization of Bacillus cereus Isolates from Clinical and Natural Sources.
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Bacillus cereus clinical isolates recovered from blood, wounds and diarrheal feces as well as natural isolates from normal feces, rice, dehydrated milk, and soil were characterized with respect to their biochemical profiles, antimicrobial susceptibility and enterotoxigenicity. The biochemical
Relationship of HeLa cell infectivity to biochemical, serological, and virulence characteristics of Yersinia enterocolitica.
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Examination of 69 strains of Yersinia enterocolitica which represented 20 serotypes and nontypable isolates for HeLa cell infectivity by a roller tube technique that provided a quantitative index of infection showed that infectivity (index, greater than 3.50) was confined to strains of serotypes
Lack of correlation between known virulence properties of Aeromonas hydrophila and enteropathogenicity for humans.
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Five strains of Aeromonas hydrophila were selected for use in volunteer challenge trials. All five strains produced cytotoxin, hemolysin enterotoxin, lysine decarboxylase, acetylmethylcarbinol, and DNase. Two strains hydrolyzed esculin. All strains produced purulent hemorrhagic fluid accumulation in
Clinical significance of virulence-related assay of Yersinia species.
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During the 42-month period from June 1982 through December 1985, 215 fecal specimens from 171 patients were found to be positive for yersiniae by using a combination of CIN agar and cold enrichment. Isolates were tested for markers of virulence including carriage of a plasmid 42 megadaltons in size,
Occurrence of enterotoxigenic and nonenterotoxigenic Bacteroides fragilis in calves and evaluation of their antimicrobial susceptibility.
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Bacteroides fragilis is considered an important clinical pathogen and the most common anaerobe isolated from human and animal clinical specimens; enterotoxigenic strains produce diarrhea. The presence of enterotoxigenic (ETBF) and nonenterotoxigenic B. fragilis in stool samples from calves with or
[Clinical and microbiologic characteristics of 282 pediatric patients with mesophilic Aeromonas isolated from feces].
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BACKGROUND
The aim of the study was to assess the microbiological characteristics and the clinical aspects of pediatric patients (age < 14 years) with infectious diarrhea due to one of the species included among the mesophilic Aeromonas group (AMs) from January 1989 to December 1991.
METHODS
The
Detection of enterotoxigenic Bacteroides fragilis in patients with ulcerative colitis.
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OBJECTIVE
Ulcerative colitis (UC) as a type of inflammatory bowel disease (IBD), presumed to occur as a consequence of increased immune responses to intestinal microbiota in genetically susceptible individuals. Enterotoxigenic Bacteroides fragilis (ETBF) strains are important intestinal bacteria
Trabulsiella guamensis, a new genus and species of the family Enterobacteriaceae that resembles Salmonella subgroups 4 and 5.
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In 1985 the vernacular name Enteric Group 90 was coined for a small group of strains that had been referred to our laboratory as probable strains of Salmonella but did not agglutinate in Salmonella typing antisera. By DNA-DNA hybridization (hydroxyapatite method, 32P), seven strains of Enteric Group
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- Leia publicações científicas relacionadas à sua pesquisa
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