[Characteristics of the reaction of the parathymic lymph nodes to pathogenic influences].

Lymph nodes were studied on sections in white rats within 0.5 and 2 h after introduction of an antigen, an immunodepressant and upon stress. An early and distinct increase in the number of fat cells is observed in the parathymic lymph nodes in response to these effects. Already within 2 h, the reaction of parathymic nodes was not uniform and was determined by the character of experiments. No changes were noted at this time in the other lymph nodes.