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27 Cards in this Set
- Front
- Back
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Skin Normal Flora:
Diptheroids |
Gram +, varied shape, low virulence
Cause body odor Cornyebacterium diptheria Propionibacterium acnes |
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Skin Normal Flora:
Staphylococci |
Gram +, salt tolerant
Prevent pathogenic colonization Maintains normal flora balance S. epidermis |
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Skin Normal Flora:
Yeast |
Tiny lipophilic, round or oval shapes, some rods
Generally harmless |
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Folliculitis Agent
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S. aureus - Gram +
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Folliculitis Symptoms
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Small red bump/pimple at hair follicle
Furuncle - infection spreads to adjacent tissue Carbuncle - large infected area |
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Folliculitis Pathogenesis
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Infection induces inflammatory response and draws leukocytes to site
Systemic infection can infect other organs/tissues |
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Folliculitis Epidemiology
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Normally found in nostrils
Spread through contact Survives outside well |
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Folliculitis Prevention/Treatment
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Very little treatment
Resistant to drugs Surgical drainage of boils |
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Scalded Skin Syndrome Symptoms
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Skin appears burned
Begins as redness Nose, mouth, genitals painful Symptoms appear within 48 hours |
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Scalded Skin Syndrome Agent
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S. aureus
Caused by exfoliatin toxin Destroys integral layer of epidermis |
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Scalded Skin Syndrome Pathogenesis
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Toxin released at infection site
Outer skin is lost 40% mortality |
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Scalded Skin Syndrome Epidemiology
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Can appear in any age group
Transmitted person to person |
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Scalded Skin Syndrome Prev/Treat
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Prev - isolation
Treat - bactericidal antibiotics, removal of dead skin |
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Streptococcal Impetigo Agent
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S. pyogenes - Gram +, Beta hemolytic cocci
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Streptococcal Impetigo Symptoms
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Superficial infection
Blisters develop, break, and crust over |
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Streptococcal Impetigo Pathogenesis
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Infection through minor injuries
Bacteria produce proteases and nucleases Bacteria surface proteins interfere with phagocytosis |
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Streptococcal Impetigo Epidemiology
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Prevalent in children
Spread person to person |
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Streptococcal Impetigo Prev/Treat
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Prev - cleanliness, avoidance of infected
Treat - Antiseptics, penicillin/erythromycin |
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Rocky Mountain Spotted Fever Agent
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Rickettsia ricketrsii
Gram -, non-motile, coccobacillus Obligate, intracellular, parasite Very small, hard to see on stain |
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Rocky Mountain Spotted Fever Symptoms
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Initial pink spot rash - starts on hands and feet
Spots spread +become hemorrhagic Can cause shock or death if spreads to organs |
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Rocky Mountain Spotted Fever Pathogenesis
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Spread through bite then into blood
Endocytosed by cells Endotoxin causes disseminated intravascular coagulation - leads to shock |
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Rocky Mountain Spotted Fever Epidemiology
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Zoonoses
Passed by ticks - Dermacentor andersoni and variablis |
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Rocky Mountain Spotted Fever Prev/Treat
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Prev - Avoidance/removal of ticks
Treat - early doxycycline and chloramphenicol is effective |
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Lyme Disease Agent
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Borrelia burgdorferi
large, microaerophillic spirochete Circular, not linear genome Multiple copies |
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Lyme Disease Symptoms
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Stage 1 - rash
Stage 2 - 2-8 weeks after, heart+nerves impaired Stage 3 - 6 months after, arthritis, chronic nerve impairment |
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Lyme Disease Pathogenesis
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Spreads radially from bite
Causes inflammatory reaction |
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Lyme Disease Prev/Treat
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Prev - avoidance/removal ticks
Treat - early drugs |
