Periodontal disease in mothers indicates risk in their children.

Introduction: It is well established that severe periodontitis clusters in families, but there are no data about the relationship between mothers with chronic periodontitis and their children's periodontal status.

Objective: To evaluate a risk for periodontal diseases in children of periodontally diseased and healthy mothers.

Methods: Four study groups were included: (I) 20 female patients with untreated generalized severe chronic periodontitis, (II) their children (34), (III) 13 periodontally healthy mothers and (IV) their children (13).

Organization of the horizontally transferred pheBA operon and its adjacent genes in the genomes of eight indigenous Pseudomonas strains.

Horizontal transfer of genes encoding phenol degradation (pheBA) in the environment has been previously described. Complete or partial phe-operon was redetected in plasmids of several indigenous Pseudomonas strains isolated from the river water. The sequences of up- and downstream regions of the acquired phe-DNA in eight different plasmids were analyzed.