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Accumulation of fibrin/fibrinogen in lung tissues. Mice were instilled with saline (a) or 20 μg of ricin/100 g body weight (b) before the harvesting of tissues 48 hours later. Tissue sections were incubated with an antibody specific for fibrin/fibrinogen. c: Increased deposition of reaction product within the microvasculature of an alveolar septum. Original magnifications: ×100 (a, b); ×1000 (c).
