RT Journal Article SR Electronic T1 Acute haemolytic anaemia due to IgM penicillin antibody in a 3-year-old child: a sequel to oral penicillin. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 321 OP 323 DO 10.1136/jcp.28.4.321 VO 28 IS 4 A1 G W Bird A1 M W McEvoy A1 J Wingham YR 1975 UL http://jcp.bmj.com/content/28/4/321.abstract AB A hitherto undescribed form of immune haemolytic anaemia due to penicillin antibody is described. The antibody, which was of the IgM class, fixed complement and caused acute haemolysis. Oral penicillin seems to have been responsible both for antibody production and, on subsequent exposure, for the haemolytic anaemia.