Identification of uidA gene sequences in beta-D-glucuronidase-negative Escherichia coli.
AUTOR(ES)
Feng, P
RESUMO
A probe specific for the uidA gene of Escherichia coli hybridized with 112 of 116 E. coli isolates examined, including 31 beta-D-glucuronidase-negative and 12 enterohemorrhagic E. coli serotype O157:H7 isolates. Southern hybridizations confirmed the presence of a 900-bp HinfI fragment from the uidA gene in all isolates examined, suggesting that uidA gene sequences are present in most E. coli.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=182706Documentos Relacionados
- Proportion of beta-D-glucuronidase-negative Escherichia coli in human fecal samples.
- Distribution of uidA gene sequences in Escherichia coli isolates in water sources and comparison with the expression of beta-glucuronidase activity in 4-methylumbelliferyl-beta-D-glucuronide media.
- Regulation of beta-glucuronidase synthesis in Escherichia coli K-12: constitutive mutants specifically derepressed for uidA expression.
- Regulation of beta-glucuronidase synthesis in Escherichia coli K-12: pleiotropic constitutive mutations affecting uxu and uidA expression.
- Negative Dominant Mutations of the uidR Gene in ESCHERICHIA COLI: Genetic Proof for a Cooperative Regulation of uidA Expression
