[Experimentation with a new simplified proof of the classic Rantz and Randall technic and of an automatic titrator for rapid determination of the antitreptolysin titre].

One thousand human sera have been tested for O-streptolysin antibodies, using classic Rantz and Randall technic and a simplified proof, based upon a single initial serum dilution 1 : 200 and the determination of five titers, corresponding to 250-332-500-666-1000 antistreptolysin units/ml. The semplified proof has the advantage over the classic technic, to lower down to a half, routinary work. The use of Titrator Sclavo, greatly reduces the time involved in the performance of both tests.