title: Comparative evaluation of adsorption with E. coli on ELISA tests for Lyme borreliosis.
abstract: OBJECTIVE
  To evaluate prospectively in a clinical setting the use of a soluble fraction of E. coli to adsorb nonspecific antibodies which can cause false positive ELISA tests for Lyme borreliosis.
  
  
  METHODS
  The patient population tested was obtained from individuals referred to or initially presenting at a pediatric Lyme disease clinic in Wilmington, DE. Patients were followed for a minimum of 6 months subsequent to primary presentation at the clinic.
  
  
  RESULTS
  A total of 209 met criteria for study inclusion, 93 of whom were diagnosed as having Lyme borreliosis and 116 of whom had other diagnoses. Results of ELISA tests were compared with different diagnoses and, when available, ELISA results from commercial laboratories. Findings indicate that some commercial laboratories have excessively high rates of false positive results (> 90% of positives were found to be false positives).
  
  
  CONCLUSIONS
  Adsorption with E. coli antigens effectively removed antibodies causing false positive results including those occurring at commercial laboratories and did not cause any significant reduction in assay sensitivity.
authors.affiliation: Department of Medical Cell Biology, Alfred I. duPont Institute, Wilmington, DE 19899, USA.
authors.forename: P T
authors.initials: PT
authors.lastname: Fawcett
authors.forename: C D
authors.initials: CD
authors.lastname: Rose
authors.forename: K M
authors.initials: KM
authors.lastname: Gibney
mesh_terms: D000327:Adsorption; D000907:Antibodies, Bacterial / Q000032:analysis; D015748:Borrelia burgdorferi Group / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay / Q000379:methods*; D004926:Escherichia coli; D005189:False Positive Reactions; D006801:Humans; D008193:Lyme Disease / Q000175:diagnosis* / Q000276:immunology; D011446:Prospective Studies
chemical_list: D000907:Antibodies, Bacterial