Other implicated micro-organisms include Micrococcaceae, Corynebacterium and Pityrosporum.
Brevibacterium, Propionibacterium, Staphylococcus epidermidis. Staphylococci are most often dominant on the sole and dorsal surface of the feet whereas aerobic coryneforms predominate in the majority of fourth toe clefts. The feet of diabetic men have decreased populations of Staphylococcus species, increased populations of Staphylococcus aureus, Pseudomonas aeruginosa, Proteus mirabilis and Bacteroides fragilis, and increased bacterial diversity, compared with the feet of controls. These ecologic changes may affect the risk for wound infections.
The skin surface pH is significantly higher on the sole than on the dorsal surface (top of the foot).