Potentially dangerous group O blood: incidence of anti-A and anti-B haemolysins in group O blood in Port Moresby.

Samples of serum from 322 group O donors taken at random at Port Moresby, were examined within 24 hours of collection of blood by a simple screening test for haemolysins; 101 (35.31%) of 286 Papua New Guinean (PNG) group O sera and 16 (44.44%) of 36 European sera containing either anti-A or anti-B haemolysins. There were no differences in the extent to which A or B cells from Europeans or Papua New Guineans were lysed by these sera.