Yaws
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Transcript of Yaws
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COMMUNICABLE DISEASE~ YAWS ~
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DEFINITION• Tropical infection of the
skin,bones,and joints.• Originated in tropical areas of Africa,
and spread to other tropical areas of the world.
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ETIOLOGY
Caused by the spirochete bacterium
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PATHOPHYSIOLOGY # transmitted by skin to skin contact with an infective lesion .# the bacterium entering through pre-existing cut, bite or scratch .# within ninety days the infection painless but distinctive “mother yaw” appears , which is painless nodule which enlarge and become warty in appearance.
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MODE OF TRANSMISSION
• Transmitted by direct contact with the sores of infected people
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INCUBATION PERIOD
• Generally 3-5 weeks .• after the incubation period , a primary lesion called ‘mother yaw’ appears at the spot from where the bacteria entered.
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SIGN AND SYMPTOMS
• Skin lesion on the palms and soles.• Swelling of the finger.• Bone pain.• Scarring of the skin.• Bone,joint and soft tissue destruction.
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Nodules on the elbow resulting from bacterial infection.
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RISK FACTOR
• Children are the main reservoir of infection . Usually children in rural,warm and tropical areas.
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INVESTIGATION
• sample taken from early lesion may show the responsible organism.• Blood test.
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TREATMENT
• IM Penicillin• Erythromycin• Tab tetracycline
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PREVENTION
• maintain hygienic lifestyles• receive penicillin or other antibiotic to prevent infection.