Cause. Pus-forming organisms believed to enter the blood through a wound in the skin.
Treatment. As there are no external symptoms, treatment is not possible.
RHEUMATISM
Not a common trouble
Symptoms. Lameness and stiffness of joints.
Cause. May be due in some cases to too stimulating food and to dampness.
Treatment. Put affected bird in dry quarters and vary food, adding more greens. Rub joints with embrocation, or turpentine and oil.
ROUP (CONTAGIOUS CATARRH)
One of the most serious contagious diseases
Symptoms. The bird first has symptoms of an ordinary cold, such as running at the nostrils and sneezing. Definite evidence of roup is the offensive odor detected on opening the bird’s mouth. The exudate is also offensive. The disease may attack the eyes, which then become inflamed and swollen; a tumor, containing offensive, yellowish, cheesy matter, sometimes develops. The course of the disease may extend over several weeks or months and there may be cases of chronic roup. Some cases end fatally in a comparatively short time. The form of the disease, in which yellowish patches develop on the throat, is dealt with under diphtheria or diphtheritic roup.
Fig. 19.—EXAMINING A FOWL WITH A SUSPICIOUS COLD