Lack of virulence factors in Eschericia coli strains of enteropathogenic serogroups isolated from water
Article Abstract:
The virulence factor or virulence-gene sequences in 38 strains of Eschericia coli belonging to human enteropathogenic groups was analyzed. The strains were isolated from 33 of 208 waters samples using the membrane filtration and multiple-tube tecniques for fecal coliforms. Results showed that 38 E. coli strains were enterpathogenic. However, none of the strains produce virulence factors. It was concluded that water samples should not be incriminated as a source of human diarrheal infection unless specific virulence factors were detected.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1992
User Contributions:
Comment about this article or add new information about this topic:
Typing of bovine attaching and effacing Escherichia coli by multiplex in vitro amplification of virulence-associated genes
Article Abstract:
The development of an identification test for amplifying genes associated with virulence in bovine enteropathogenic Escherichia coli, enterohemorrhagic E. coli and verotoxigenic E. coli strains are described. The method is based on multiplex PCR assay of the virulence-associated genes, and is equally efficient as the hybridization method. It is also very specific and fast. Thirty tested strains mostly comprise eaeA+ and aeaA+ slt-I+, and less number of aeaA+ slt-I+ slt-II+ and aeaA+ slt-II+.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1996
User Contributions:
Comment about this article or add new information about this topic:
Comaparison of Campylobacter isolates from poultry and humans: association between in vitro virulence properties, biotypes, and pulsed-field gel electrophoresis clusters
Article Abstract:
Research investigates virulence properties associated with genotypes and biotypes of 197 Campylobacter isolates. Results show that all isolates adhere to INT-407 cells but only 63% invaded and 13% are cytotoxic for CHO cells. Furthermore, greater proportion of isolates exhibit high invsiveness potential or Vero cell cytotoxicity for human than poultry isolates.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 2003
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Cloning of a creatinase gene from Pseudomonas putida in Escherichia coli by using an indicator plate. Chromosomal locus for cadmium resistance in Pseudomonas putida consisting of a cadmium-transporting ATPase and a MerR family response regulator
- Abstracts: Isolation of nitrogen-fixing bacteria containing molybdenum-independent nitrogenases from natural environments
- Abstracts: Virulence characteristics of clinical and environmental isolates of Vibrio vulnificus. RpoS-dependent stress response and exoenzyme production in Vibrio vulnificus
- Abstracts: PS2 integrin requirements in Drosophila embryo and wing morphogenesis. Characterization of mutant alleles of myospheroid, the gene encoding the beta subunit of the Drosophila PS integrins
- Abstracts: Purification and characterization of a new bacteriocin isolated from Carnobacterium sp. A food-grade process for isolation and partial purification of bacteriocins of lactic acid bacteria that uses diatomite calcium silicate