Rheumatoid arthritis (RA) is a long lasting autoimmune disorder that primarily affects joints. It typically results in warm, swollen, and painful joints. Pain and stiffness often worsen following rest.Most commonly the wrist and hands are involved with typically the same joints involved on both sides of the body.heumatoid arthritis (RA) is a long lasting autoimmune disorder that primarily affects joints. It typically results in warm, swollen, and painful joints. Pain and stiffness often worsen following rest.
tuberous sclerosis a congenital heredofamilial disease, transmitted as an autosomal dominant trait, characterized principally by the presence of hamartomas of the brain (tubers), retina (phakomas), and viscera, mental retardation, seizures, and adenoma sebaceum, and often associated with other skin lesions.
Sheep Scab. Sheep scab is one of the most contagious parasitic diseases of sheep in Great Britain and is now considered to be endemic. The condition itself is a form of allergic dermatitis caused by the highly parasitic scab mite Psoroptes ovis.heep scab is one of the most contagious parasitic diseases of sheep in Great Britain and is now considered to be endemic.