Focal infection theory is the historical concept that many chronic diseases, including systemic and common ones, are caused by focal infections. A focal infection is a localized infection, often asymptomatic, that causes disease elsewhere in the host, but the present medical consensus is that focal infections are fairly infrequent and mostly limited to fairly uncommon diseases.
Focal infection theory is the historical concept that many chronic diseases, including systemic and common ones, are caused by focal infections. A focal infection is a localized infection, often asymptomatic, that causes disease elsewhere in the host, but the present medical consensus is that focal infections are fairly infrequent and mostly limited to fairly uncommon diseases.
Source: Wikipedia "Focal infection theory" · CC BY-SA 4.0
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