[Plasmid profile of common neonatal sepsis causative agents].

The plasmid profile of 25 hospital strains of Gram-negative bacteria that are known to be originators of neonatal sepsis was studied by the authors. Of these, E. coli, Enterobacter spp., and Citrobacter spp. proved to be the most frequently seen causative agents in the above health problem, with 13, 5, and 7 strains respectively having been recovered in the studied material. There have been isolated 26 plasmids from the studied 25 bacterial strains. Of these, fifty percent were classified as Citrobacter spp. The molecular mass of the plasmids recovered has been found to vary among 30 and 120.