Characterization of Escherichia coli O157:H7 from downer and healthy dairy cattle in the upper midwest region of the United States
Article Abstract:
The authors have investigated Escherichia coli O157:H7. The results have demonstrated the prevalence of O157:H7 in fecal and tissue samples from the colons of downer dairy cattle than in those from healthy dairy cattle.
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:
Export of virulence genes and shiga toxin by membrane vesicles of Escherichia coli O157:H7
Article Abstract:
Membrane vesicles released by Escherichia coli O157:H7 contain DNA encoding the virulence genes eae, stx1 and stx2, as well as uidA, which encodes for beta-galactosidase, while immunoblotting data show that Shiga toxins 1 and 2 are contained within vesicles. This was gleaned from a study that sought to determine whether E coli O157:H7 produces vesicles under normal growth conditions and whether these contain Shiga toxins and DNA and transfer virulent genes. Results indicate that these vesicles play a role in the export of toxic and genetic material. They can facilitate the transfer of genetic material to other enteric organisms and may serve to disseminate toxic material directly to host cells or to bacterial cells.
Publication Name: Applied and Environmental Microbiology
Subject: Biological sciences
ISSN: 0099-2240
Year: 1999
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Genotypic analyses of Escherichia coli O157:H7 and O157 nonmotile isolates recovered from beef cattle and carcasses at processing plants in the Midwestern states of the United States
- Abstracts: Characterization of the properties of human- and dairy-derived probiotics for prevention of infectious diseases in fish
- Abstracts: Production of diarrheal enterotoxins and other potential virulence factors by veterinary isolates of Bacillus species associated with nongastrointestinal infections
- Abstracts: Laboratory evolution of toluene dioxygenase to accept 4-picoline as a substrate. A C (sub)35 carotenoid biosynthetic pathway
- Abstracts: Group A rotavirus in sewage samples from Barcelona and Cairo: emergence of unusual genotypes. Potential role of fomites in the vehicular transmission of human astroviruses