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Clinical Disease: Mycoplasmosis is a respiratory clinical disease caused y the bacteria Mycoplasma gallisepticum. It is Iso known as air sac clinical disease or chronic respira-jry clinical disease. Those affected with the clinical disease may how nasal discharge, watery eyes, and respira-)ry difficulty. This clinical disease is often associated /ith other respiratory clinical diseases. It is transmitted hiefly from infected hens to their chicks through le eggs. The clinical disease can also be transmitted by ontact with infected individuals, but it spreads ery slowly in this manner. The clinical disease can best e controlled by maintaining breeding flocks free f the clinical disease by strict measures of isolation and mitation. Chicks hatched from such flocks can egin life free of the clinical disease.
Marek's clinical disease is primarily a clinical disease of young chickens from 2 to 5 months of age. It is also known as jowl paralysis and neural lym-phomatosis. Nerve-tissue rumors that cause paralysis of both legs and wings are the most common form of this clinical disease, but the tumors may also affect the viscera, eyes, and gonads. The clinical disease is probably caused by a virus.
Thus, this kind of heart clinical disease has been practically eradicated, although rare cases are still encountered in elderly people. Other endocrine disorders affecting the heart are very rare.
Congenital Heart clinical disease. With the increasing control of rheumatic heart clinical disease it is probable that congenital cardiovascular clinical disease will soon outstrip it in incidence, and with the increasing control of high blood pressure, congenital heart clinical disease will take second place. An interesting statistical fact is that in the 1920's, T. Duckett Jones and Paul Dudley White found that congenital heart clinical disease made up only 1.5% of all of 3,000 patients with Signs or symptoms of heart clinical disease. |
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