Comparison of Psoriatic Plaque Bacterial Flora to Skin Normal Flora

Over a one year period, 50 psoriatic patients were entered into the present study. The patients were selected among those who were referring to the Dermatology Clinic of Ghaem Hospital. The selected patients were being referred to the Microbiology Laboratory of Special Clinic of Ghaem. A sample was obtained from the psoriatic plaque of each patient. Meanwhile, samples were obtained from normal skin flora of a control group. The control group consisted of healthy volunteers.
The bacteria isolated from the psoriatic plaques were staphylococcus aureus, coagulase-negative Staphylococci, Staphylococcus epidermidis, Klebsiella pneumoniae and Pseudomonas aeroginosa. Some of the samples were sterile. The bacteria isolated from the skin of healthy volunteers were species of coagulase-negative staphylococci, Corynebacterium saprophyticus and Staphylococcus epidermidis, all of which are components of skin normal flora.
Results of this study show that the psoriatic plaque is a suitable environment for growth of pathogenic Staphylococcal species because these species were not been isolated from the skin of healthy volunteers.