RT Journal Article SR Electronic T1 Polyvalent heat-killed antigen for the diagnosis of infection with Legionella pneumophila. JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP 434 OP 438 DO 10.1136/jcp.35.4.434 VO 35 IS 4 A1 R J Fallon A1 W H Abraham YR 1982 UL http://jcp.bmj.com/content/35/4/434.abstract AB A polyvalent antigen composed of heat-killed agar-grown Legionella pneumophila serogroups 1-4 suspended in a suspension of yolk-sac from embryonated hens' eggs has been examined for use in the indirect fluorescent antibody test for Legionella infection. The serological response detected by monovalent antigen correlated well with that detected by polyvalent antigen. The use of polyvalent antigen forms a useful screening test for the detection of antibody to L pneumophila, but positive results must be confirmed by test using monovalent antigen.