A system of practical medicine…
“ ETIOLOGY.—Acute pharyngitis may be idiopathic, deuteropathic, traumatic, toxic, or parasitic. The predisposing cause may be diathetic, as scrofula, rheumatism, gout, and syphilis; it may be a depression of the vital powers from any cause, such as continued exposure to foul air or impure water, improper diet or sedentary occupations. There exists in some individuals a predisposition to "catching cold," independent of any cachexia. Pharyngitis may occur at any age, but is more frequent in the young. One attack increases subsequent liability to the disease. ”
