Inflammation of the lymph nodes. The disease is secondary, arising from the presence of an inflammatory process in a particular area of the body. Primary purulent inflammation of the lymph nodes is very rarely observed. It is caused by streptococci and other pathogenic microbes, but more often the flora is mixed. Lymphadenitis occurs when microorganisms, their toxins and products of tissue decay with lymph from the primary focus are brought into the lymph nodes. Microbes can penetrate the damaged skin, mucous membrane, by hematogenous.
There are serous, purulent and productive inflammation of the lymph nodes. When the process spreads to the surrounding tissues, periadenitis develops, which is characterized by stiffness of the inflamed nodes. The course of lymphadenitis is acute or chronic.
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