title: Detection of Legionella pneumophila antigens in patients' sera using monoclonal antibodies.
abstract: Three monoclonal antibodies (McAb) were produced against soluble antigens of Legionella pneumophila serogroup 1 which was cultured on BCYE agar. The McAbs were all of the IgM isotype. The McAbs were used in the McAb-based ELISA for detection of circulating L. pneumophila antigens in 186 sera collected from patients with symptoms and signs suggestive of atypical pneumonia. The normal reference optical (OD) density value of each of the McAbs was determined using 44 sera collected from healthy blood donors. The antigen positivity rates for the McAbs 1C7.2B, 2B2.10F and 2B2.11E were 11.3%, 7.7% and 22.2% respectively. Antigen positivity of the McAb 2B2.10F was significantly higher in the younger age group (p < 0.05). There is no significant association between the antigen positivity with age and sex for all the McAbs. There was no cross-reaction demonstrated between the McAbs with other bacterial antigens.
authors.affiliation: Biotechnology Centre, Institute for Medical Research, Kuala Lumpur, Malaysia.
authors.forename: Y
authors.initials: Y
authors.lastname: Normaznah
authors.forename: K
authors.initials: K
authors.lastname: Saniah
authors.forename: A
authors.initials: A
authors.lastname: Noor Rain
authors.forename: A
authors.initials: A
authors.lastname: Norazah
authors.forename: M R
authors.initials: MR
authors.lastname: Azizah
authors.forename: P
authors.initials: P
authors.lastname: Sabiha
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000818:Animals; D000911:Antibodies, Monoclonal; D000942:Antigens, Bacterial / Q000097:blood*; D002648:Child; D002675:Child, Preschool; D003429:Cross Reactions; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D006801:Humans; D007223:Infant; D016952:Legionella pneumophila / Q000276:immunology* / Q000302:isolation & purification; D007877:Legionnaires' Disease / Q000175:diagnosis / Q000276:immunology*; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D008875:Middle Aged
chemical_list: D000911:Antibodies, Monoclonal; D000942:Antigens, Bacterial