DR Medhat MRCP

مرض األغنام Orf
- Orf is generally a condition found in sheep and goats although it can be
transmitted to humans. It is caused by the parapox virus.
• Features :
In animals
- 'Scabby' lesions around the mouth and nose.
In humans
- Generally affects the hands and arms.
- Initially small, raised, red-blue papules.
- later may increase in size to 2-3 cm and become flat-topped and
haemorrhagic.
Hepatitis E
• Overview
RNA virus
Spread by the faecal-oral route, incubation period = 3-8 weeks
Common in Central and South-East Asia, North and West Africa, and in
Mexico
Causes a similar disease to hepatitis A, but carries a significant mortality
(about 20%) during pregnancy
Does not cause chronic disease
a vaccine is currently in development*, but is not yet in widespread use
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