[Resistance test to streptokinase. Its value in the establishing of a thrombolytic treatment using this enzyme]

The reckoning of the rate of serous anti-streptokinase (ASK) evidenced that 8 p. 100 of the test-sample presented a distinct resistance to Streptokinase (SK), and that this percentage could be more important under certain pathological circumstances. On account of this fact and also because SK injectable preparations may offer a variation in activity, the writers advocate a "preliminary control in vitro" by means of the resistance test to streptokinase that enables one to make sure, for each patient, of the biological efficacy of the drug and to specify the starting posology.