[Determination of anti-O-streptolysin with polystyrol latex].

Comparison is made between the results obtained with a new method for the determination of serum ASO titres based on rapid agglutination on slides with the use of polystyrene latex and those given by the classic haemolytic method. A virtually complete correspondence was observed between the two techniques and it is suggested that the new test be employed as a preliminary screening measure in the determination of serum ASO titres.