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Respiratoi Disease: Strangles (Distemper). Strangles is a respiratoi disease, primarily of young horses, caused by d bacterium Streptococcus equi and characterize by a nasal discharge of mixed mucus and pu with pus-filled abscesses in the lymph nodes < the head and neck.
The disease is transmitted by direct or ind rect contact and has an incubation period of 4 t 10 days. Early Signs are a rectal temperature c 104° F (40° C) or more, increased respiration coughing, depression, and poor appetite.
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.
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