[Effect of the fever reaction on lymph cytologic composition and lymph node structure].

The authors studied the cytologic composition of afferent and efferent lymph and the morphology of the popliteal lymph node during a fever reaction of various duration. The fever reaction was attended by quantitative and qualitative in the cytologic composition of both lymph types. Reduction of the leukocyte count in the first hours of fever was replaced by its increase: the percentage of small- and moderate-size lymphocytes reduced, while that of poorly-differentiated cells--blasts and prolymphocytes--increased. The number of neutrophils and monocytes in the afferent lymph grew and its toxicity increased. Phenomena of dynamic stereotypy were noted during the development of the fever reaction: hyperplasia of the lymphatic substance with an increase of the number of lymphocytes and poorly-differentiated cells in the follicles and paracortical zone of the lymph nodes, hyperplasia of the pulpar bands, and signs of a macrophageal reaction.