Isolation and characterization of several cryptic plasmids from clinical isolates of Bacteroides fragilis.

Bacteriological Techniques Bacteriolysis Bacteroides/isolation & purification Carbon Radioisotopes Centrifugation, Density Gradient DNA, Bacterial/analysis,radiation effects Microscopy, Electron Nucleic Acid Conformation Radiation Effects Thymidine/metabolism Tritium Ultracentrifugation

Carbon Radioisotopes DNA, Bacterial Tritium Thymidine