Periodontal status of type 2 diabetics compared with nondiabetics in north Jordan

The periodontal status of 106 type 2 diabetic patients was assessed and compared with that of 106 age-matched nondiabetics. Patients older than 20 years with type 2 diabetes mellitus were recruited from the outpatient internal medicine clinics at the 2 main hospitals in Irbid governorate, Jordan. Periodontal disease was more severe in type 2 diabetic patients than in nondiabetics, as indicated by significantly mean higher gingival index, periodontal pocket depth, clinical attachment level and tooth mobility. There was no significant difference in the mean plaque index between diabetics and nondiabetics. The severity of periodontal disease was significantly higher in patients with diabetes > 5 years than those with duration

Symbiotic properties of trasformed Rhizobium phaseoli and its susceptibility to phages of the donour recipient strains

The presence of extrachromosomal DNA [viz. plasma DNA] in Rhizobium leguminosarum F21 and R. phaseoli L1 was investigated. On the basis of antibiotic sensitivity tests, both Rhizobium strains were found to contain plasmids and carrying streptomycin resistance genes. Plasmids DNA was isolated from other strains and analyzed by agarose gel electrophoresis. The plasmid DNA of all strains was detected as one band on the gel indicating that R. leguminosarum F21 and R. Phaseoli L1 contain just one plasmid of 21,200 kbp. Transferring of R. leguminosarum plasmid into R. Phaseoli resulted in the transfer of faba bean infectivity to R. phaseoli. Moreover, the transformed strain exhibited a high efficiency in nodulating roots of both faba bean as well as in fixing nitrogen