Diabetes mellitus (DM) is one of the most chronic and dangerous diseases worldwide and in the Saudi society in particular. Swabs (168) from DM injuries were collected from inpatient and outpatient departments. Analysis of variance revealed the high incidence of diabetic foot infections compared to other injuries by an average of 51 and 33, respectively. Adults’ category was significantly the highest age category in the incidence. Inpatients have recorded the highest incidence than outpatients, while routine cases have recorded the highest rates of infection compared to the urgent and very urgent cases. Etiology was confined in 210 bacterial isolates belonging to gram negative (G-ve), gram-positive (G+ve), aerobic and anaerobic bacteria. The study detected a high incidence in one genus/swab compared to two, three, four genera and polymicrobial/swab, with 67, 14, 1, 0.5 and 1.5% respectively. Aerobic bacteria reached 98.5% compared to anaerobic bacteria (1.5%). G-ve aerobic bacteria were highly significant compared to the G+ve. The dominant bacterial species in diabetic injuries was Pseudomonas aeruginosa followed by Staphylococcus aureus with a rate of 28 and 17%, respectively. It is worth noting that the antibacterial ability was evident in Ps. aeruginosa for the most bacterial isolates tested, and this reinforces the result found in the study of Ps. aeruginosa’s dominance in diabetes compared to the rest of the isolated bacterial genera. Results of the study are considered unique in the epidemic spread of diabetic injuries for inpatients, outpatients, as well as the antagonistic relations of each bacterial etiology of diabetic injuries in Saudi Arabia.
Key words: Epidemiology, etiology, bacteria, diabetic injuries, age, in-outpatients, priority, polymicrobial, aerobic, anaerobic, Ps. aeruginosa, S. aureus.
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