Pyoderma
Pyoderma is a group name for pyococcal dermatoses which are generally purulent. In tropical countries, pyoderma is a common problem, particularly in the summer and the monsoon.
The two important pyogenic organisms are the Staphylococcus aureus and the Streptococcus pyogenes. The former is more important in skin infections than the latter. Follicular infections are mainly due to staphylococci; while erysipelas and cellulitis are caused by streptococci. Besides these, other organisms which occasionally come across in pyodennas are bacillus proteus, pseudomonas and coliform bacilli. The following are, broadly speaking, the different conditions produced by them depending upon the causative organisms and the location of the lesions:
| 1. Epidermal Impetigo pityroides. |
Streptococcal intertrigo.
Impetigo contagiosa, pustular bacteride,
granuloma pyogenicum, pyoderma gangrenosum,
infectious eczematoid dermatitis, otitis extema. |
| 2. Sub-epidermal |
Erysipelas. |
| 3. Follicular |
Bockhart's impetigo, sycosis, furunculoses,
carbuncle, stye, marginal blepharitis. |
| 4. Sweat glands |
Eccrine--Sudoripora suppurativa.
Apocrine-Hidradenitis suppurativa. |
| 5. Dermis |
Cellulitis. |
| 6. Subcutaneous fat |
Panniculitis. |
| 7. Blood vessels |
Arteritis, capillaritis, vasculitis, phlebitis. |
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