A novel coloured latex test for the detection and identification of more than one antigen

A novel latex agglutination test employing coloured latex particles is described. The latex reagent contains two or more differently coloured latex suspensions, each colour having been coated before mixing with at least one specific antibody, so that two or more antigens can be detected and identified with a single reagent. The antigen is identified by observing the colour of the agglutinated particles against a contrasting change in the colour of the background.