Introduction:. Skin:The skin has the largest surface area of all of the body organs and is the most exposed organ. It is very effective in providing protection against the external environment. skin infections are common presentations.Normal flora of the skin:Mainly Gram positive
1. Microorganisms infecting the skin Dr. Sayeed Ismail Khatib
Microbiology & Immunology
Ibn Sina National College for Medical Studies
2. Introduction: Skin:
The skin has the largest surface area of all of the body organs and is the most exposed organ.
It is very effective in providing protection against the external environment.
skin infections are common presentations.
Normal flora of the skin:
Mainly Gram positive – Staphylococci, Streptococci, Propionibacterium acnes, etc.
4. Skin infections are often the result of a break in the integrity of the skin
5. Pathogens of the skin: Bacteria:
Ectoparasitic skin infection
by Sarcoptes scabei, variety hominis
6. STAPHYLOCOCCAL INFECTIONS
(localized pyogenic lesions)
Skin and soft tissue:
Folliculitis, Furuncle (boil), Abscess (particularly breast abscess), wound infection, carbuncle, impetigo, paronchia, less often cellulitis
Osteomyelitis, arthritis, pyomyositis.
Respiratory: Tonsillitis, lung abscess, pharyngitis, etc.
Central nervous system:
41. Fungi: Candida albicans Candidiasis is by far the most common type of yeast infections in human skin.
Candidiasis is infection with Candida spp.
Mainly occurring as vaginal infections and oral thrust.
More than 20 species of Candida exist.
The most common is Candida albicans.
45. Parasitic infection: Scabies Infestation is common, found worldwide, and affects people of all races and social classes.
Scabies spreads rapidly under crowded conditions where there is frequent skin-to-skin contact between people, such as in hospitals, institutions, child-care facilities, and nursing homes.
46. Ectoparasitic skin infection caused by
Sarcoptes scabei, variety hominis
A scabies burrow under magnification. The scaly patch at the left is due to scratching of the original papule.
The mite traveled from there to the upper right, where it can be seen as a dark spot at the end of the burrow.