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Mild Disease In Man: The severity and duration of the disease vary greatly. Symptoms may be so mild disease in man as to go unnoticed by the casual observer. In severe cases the animal usually becomes thin, and the pulse and breathing rate increase. As the disease progresses, there is drooling from the mouth, discharge of mucus from the nostrils, and increasing weakness. The disease is most severe in mature cattle, and as many as 50% of the affected animals have died in some outbreaks.
In some patients who contract heart disease ii course of a single attack sustain such mild disease in man age that the heart returns almost complete normal; heart murmurs disappear, and eve electrocardiogram cannot detect any evidem abnormality. Nevertheless, such is the unprec bility of this disease that in other patients dai to the heart may not become evident until mi or years after an attack of rheumatic fever, sequently, all individuals, particularly chil who have had a recognized attack, should be lowed closely thereafter.
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.
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