Warm Haemolysins Active against Trypsinized Red Cells

Abstract

The stability of the warm haemolysins active against trypsinized red cells was studied during storage at -30°C for three months. No loss of activity was observed Possible in vivo fluctuations were studied by examining samples taken daily over a period of one month. It is concluded that the fluctuations sometimes observed when testing for warm haemolysins are not in vivo fluctuations but may be caused by differences in the trypsin treatment.

Studies on Naturally Occurring Warm Haemolysins and Haemagglutinins Active against Trypsinized Red Cells

“…The difficulties in reproducing these findings, experienced by many workers, may be due to differences between different brands of trypsin, as pointed out recently by Heisto et al [2,3].…”