Pyoderma can be staphylococcal and streptococcal. Streptococcal pyoderma is characterized by smooth skin lesions, superficial spread, and a tendency to peripheral growth. In addition to the above factors provoking and predisposing to the development of pyoderma, it is necessary to note the role of pathological changes in the skin. With dermatoses accompanied by the appearance of erosions and oozing lesions, swelling of the epidermis, favorable conditions are created for the development of streptoderma.
Features of the development of pustules in streptococcal pyoderma
Streptococcal pustules (conflicts) are highly contagious, observed mainly in children, sometimes — among women. Conflicts appear on a hyperemic background, do not exceed 1 cm in diameter, have a transparent content and a thin flabby tire. Gradually, the exudate becomes cloudy, shrinks into a straw-yellow and loose crust. After the crust falls off and the epithelium recovers, slight hyperemia, peeling or hemosiderin pigmentation temporarily persist. The number of conflicts is gradually increasing. Process dissemination is possible. Often complications of streptococcal pyoderma in the form of lymphangitis and lymphadenitis.
In weakened individuals, the process of streptococcal pyoderma may spread to the mucous membranes of the nasal cavity, mouth, and upper respiratory tract.
The conflict is surrounded by a hyperemic zone in the form of a corolla. The process is characterized by slow peripheral growth.
Varieties of rash elements in streptococcal pyoderma include:
- zaeda;
- simple lichen;
- superficial paronychia;
- intertriginous streptoderma;
- syphile-like papular impetigo;
- chronic diffuse papular streptoderma;
- ecthyma.
Features of the course of streptococcal pyoderma depending on the type of lesion
Zayeda (slit-like impetigo, perlesh, angular stomatitis) is characterized by damage to the corners of the mouth. Painful slit-like erosion appears on the edematous hyperemic background. Often, the process develops in people suffering from caries, hypovitaminosis, atopic dermatitis.
Lichen simplex occurs more frequently in preschool children. In springtime, on the skin of the face, the upper half of the body, rounded pink spots appear, covered with whitish scales. With a large number of scales, the spot is perceived as white.
Superficial paronychia can be observed both in people working in fruit and vegetable processing plants, in confectioneries, etc., and in children who have the habit of biting their nails, estet-portal.com draws attention. The skin of the periungual roller turns red, swelling and pain appear, then a bubble with transparent contents forms. If streptococcal pyoderma becomes chronic, deformation of the nail plate.
Intertriginous streptoderma (streptococcal diaper rash) occurs in large folds, axillary areas. Conflicts appear in large numbers, then merge. Painful cracks can be found in the depths of the folds.
Syphilis-like papular impetigo occurs predominantly in infants. Favorite localization — skin of the buttocks, genitals, thighs. With this type of streptococcal pyoderma, the appearance of quickly opening conflicts with the formation of erosions and a small infiltrate at their base is characteristic.
Chronic superficial diffuse streptococcal pyoderma is characterized by diffuse lesions of significant areas of the skin, lower legs, less often — brushes. The foci have large scalloped outlines due to growth along the periphery, they are hyperemic, sometimes with a slight bluish tinge.
Ecthyma is a deep streptococcal pustule. The — element deep, non-follicular.
Streptococcal pyoderma begins as a small vesicle or perifollicular pustule with serous or seropurulent contents rapidly shrinking into a soft, golden yellow, raised crust. There is a dirty gray coating on the surface of the ulcer. The edges of the ulcer — soft, inflamed, as a result of which they rise somewhat above the surrounding skin. The ulcer heals slowly, within 2-3 weeks, with the formation of a scar, with a zone of pigmentation along the periphery.
Mixed pyoderma is characterized by the absence of both staphylococcal and streptococcal pustules (in fact, other pathogens can be detected in addition to staphylococci and streptococci).
Mixed pyoderma includes impetigo vulgaris, chronic deep ulcerative vegetative pyoderma, pyoderma gangrenosum, and pyoderma chancriformis. The course of mixed pyoderma has both similarities and differences from streptococcal pyoderma.
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