Skin Diseases

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Insight 18.3, p. 552
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ACNE caused by Propionibacterium acnes
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Staphylococcus aureusFig. 18.3, p. 541
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Catalase Test Using Hydrogen Peroxide

• (L) Staphylococcus aureus catalase ()
• (R) Streptococcus pyogenes catalase (-)

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The Coagulase Test - differentiatespathogenic
StaphFig. 18.4, p. 542
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Plasmin activation by Streptococcus pyogenes
Figure 18.6, p. 543
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Impetigo of the Newborn

• Vesicles that rupture and crust over
• associated with a toxin

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Impetigo of an Adult
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Impetigo of School-aged Children

• Isolated pustules

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Flesh-eating Bacteria
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Insight 18.1, p. 538 Staphylococcus aureus
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Fig. 18.7, p. 545 Staphylococcal scalded skin
syndrome
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Gas Gangrene Clostridium perfringensFig. 18.8,
p. 546
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Growth of Clostridium Gas Production
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Smallpox
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Chickenpox
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Fig. 18.10, p. 547 (a) Chickenpox (b) Smallpox
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Shingles Varicella zoster Fig. 18.11, p. 548
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Measles
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Distribution of the Rash
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Measles in an Adult Fig. 18.12, p. 552
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Fifth Disease

• Slapped cheek rash

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Roseola

• Occurs in children 6 months to 2 years of age

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Scarlet Fever (Strep Throat)
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Warts
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Plantars Warts
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Molluscum contagiosum
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Ringworm

• Not caused by a worm, but a fungus.

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Athletes Foot
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Nail Fungus
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Tinea versicolorFig. 18.18, p. 561
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Parasitic Skin Disease

• Sarcoptes scabiei a mite

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The Symptoms of Scabies
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Eye Diseases

• Caused by Infectious Agents

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Conjunctivitis
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Pseudomonal Eye Disease
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Trachoma
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Herpetic keratitis caused by Herpes simplex
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Fig. 18.23, p. 567