Bacterial Skin Diseases

Bacterial Skin Diseases - S. aureus cause scalded skin...

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Bacterial Skin Diseases Microbial diseases of the skin are usually transmitted by contact with an infected individual. Although  the skin normally provides a barrier to infection, when it is penetrated by microorganisms, infection  develops. Diseases of the eye are considered with the skin diseases because both occur at the  surface of the body. Staphylococcal infections.  Staphylococci are Gram-positive cocci occurring in clusters. The best  known pathogen in this group is  Staphylococcus aureus   . This organism invades the hair follicles  and causes  folliculitis , also referred to as  pustules.  A deeper infection of the skin tissues is  referred to as a  boil, abscess , or  furuncle.  These lesions are usually filled with pus. A large lesion  progressing from a boil is known as a  carbuncle.  Infections such as these are easily transmitted by  skin contact as well as by fomites.  Toxin-producing strains of 
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Unformatted text preview: S. aureus cause scalded skin syndrome. Usually found in young children and babies, this disease is characterized by vesicles on the body surface, which cause the skin to peel and give a scalded appearance. Penicillin or erythromycin antibiotics are used to treat this and other staphylococcal skin diseases. Scarlet fever. Scarlet fever is caused by Streptococcus pyogenes , a Gram-positive bacterium occurring in encapsulated chains. Most cases of scarlet fever begin as infections of the respiratory tract, followed by spread of the bacteria to the blood. The bacteria produce an erythrogenic toxin that causes the typical skin rash. Penicillin is used for therapy. Complications include damage to the heart valves known as rheumatic heart disease or damage to the joints, which is called rheumatic fever....
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This note was uploaded on 11/14/2011 for the course BIO 1421 taught by Professor Farr during the Fall '08 term at Texas State.

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