Identification of tetracycline-resistant R-plasmids in Streptococcus agalactiae (group B).
AUTOR(ES)
Burdett, V
RESUMO
In this report, 30 tetracycline-resistant clinical isolates of group B Streptococcus were examined to assess the extent to which tetracycline resistance is plasmid mediated. Of these, 27 showed no physical or genetic evidence of plasmid-mediated resistance; however, one conjugative and two small (3.5 X 10(6)-dalton) multicopy non-self-transmissible tetracycline resistance plasmids were identified. The conjugative plasmid was transmissible to Streptococcus faecalis as well as to Streptococcus agalactiae (group B). The two nonconjugative plasmids were readily mobilized by a number of sex factors into these same two backgrounds and, in addition, readily transformed Streptococcus sanguis Challis to tetracycline resistance. Due to readily available sites for several site-specific endonuycleases, these small, multicopy plasmids should prove useful as cloning vehicles in this host system.
ACESSO AO ARTIGO
http://www.pubmedcentral.nih.gov/articlerender.fcgi?artid=284087Documentos Relacionados
- R Plasmids in Streptococcus agalactiae (Group B)
- R Plasmids in Streptococcus agalactiae (Group B)
- High-level chromosomal gentamicin resistance in Streptococcus agalactiae (group B).
- Conjugative transfer of R-plasmids from Streptococcus faecalis to Staphylococcus aureus.
- Rapid tube CAMP test for identification of Streptococcus agalactiae (Lancefield group B).