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The Disease Renders: Mycoplasmosis is a respiratory disease caused y the bacteria Mycoplasma gallisepticum. It is Iso known as air sac disease or chronic respira-jry disease. Those affected with the disease may how nasal discharge, watery eyes, and respira-)ry difficulty. This disease is often associated /ith other respiratory diseases. It is transmitted hiefly from infected hens to their chicks through le eggs. The disease can also be transmitted by ontact with infected individuals, but it spreads ery slowly in this manner. The disease can best e controlled by maintaining breeding flocks free f the disease by strict measures of isolation and mitation. Chicks hatched from such flocks can egin life free of the disease.
Marek's disease is primarily a 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 disease, but the tumors may also affect the viscera, eyes, and gonads. The disease is probably caused by a virus.
But the specific causes of roaring are various. It sometimes follow-s strangles. Carriage-horses are more subject to it than saddle-horses, because of the injury done to the larynx by tight reining. There are also various kinds of roaring, distinguished by the sounds, as whistling, wheezing, high-blowing and piping. The disorder does not appear to be amenable to treatment, though in early stages, as when it proceeds from catarrh or influenza, it may be relieved by blisters or setons. The disease renders a horse unsound, as it unfits him for the ordinary strain of work.
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