“…The titres obtained with Greenbury's modification of the sensitized sheep cell agglutination test in the present series showed no correlation with the titres obtained with the British latex-bovine gamma globulin test. A lack of correlation of titres has been reported by others using American latex and human gamma globulin as the reagents, for example, Steinberg, Roberts, and Lock (1959). Greenbury compared his test with the original latex fixation test of Singer and Plotz (1956).…”