The paper is concerned with metabolic reconstitution in a pathologically changed lung tissue in rabbits with acute and chronic bronchopulmonary inflammation. Acute bronchopulmonary inflammation is associated with a drastic increase of the adrenaline, noradrenaline, acetylcholine, histamine and serotonin content in the abnormal lung tissue. The concentration of these substances in the blood outflowing from the lungs is also increased. The intensity of changes in the content of the biologically active substances correlated with the pattern of the developing pathological process. In lingering and chronic bronchopulmonary inflammation, the changes in the content of the biologically active substances were of undulatory character which was consequent on repeated exacerbations.
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