title: Early detection of hepatitis B surface antigen and detection of HBsAg mutants: a comparison of five assays.
abstract: OBJECTIVE
  Assays for the detection of hepatitis B surface antigen (HBsAg) face two challenges: the emergence of sensitive techniques for detection of hepatitis B virus DNA and the existence of HBsAg mutant hepatitis B viruses. We studied the sensitivity of five modern assays for detection of HBsAg.
  
  
  METHODS
  The sensitivity of two mini robot-based assays--IMx HBsAg V2 and Vidas HBsAg--and three enzyme-linked immunosorbent assays (ELISAs) with microtitre plate format--Hepanostika Uni-Form II v1.2, Monolisa Ag HBs Plus and HBsAg Test System 3--was compared testing 11 HBsAg seroconversion series, serial dilutions prepared from three HBsAg standards and nine HBsAg mutant samples.
  
  
  CONCLUSIONS
  Overall, the IMx HBsAg V2 assay showed the highest sensitivity. It outperformed the Vidas HBsAg in analytical sensitivity and in detection of HBsAg mutants. Among the microtitre plate ELISAs, the Monolisa Ag HBs Plus outperformed the HBsAg Test System 3 in detection of HBsAg mutants and it surpassed the Hepanostika Uni-Form II v1.2 in analytical sensitivity.
authors.affiliation: University Hospital Vrije Universiteit, Medical Microbiology and Infection Control, PO Box 7057, 1007 MB Amsterdam, the Netherlands. hans.zaaijer@vumc.nl
authors.forename: H L
authors.initials: HL
authors.lastname: Zaaijer
authors.forename: H
authors.initials: H
authors.lastname: Vrielink
authors.forename: M
authors.initials: M
authors.lastname: Koot
mesh_terms: D019719:Diagnostic Equipment / Q000592:standards; D004797:Enzyme-Linked Immunosorbent Assay / Q000295:instrumentation / Q000379:methods / Q000592:standards; D006509:Hepatitis B / Q000175:diagnosis* / Q000276:immunology; D006514:Hepatitis B Surface Antigens / Q000032:analysis* / Q000235:genetics; D006801:Humans; D009154:Mutation; D011933:Reagent Kits, Diagnostic / Q000592:standards; D012015:Reference Standards; D012371:Robotics; D012680:Sensitivity and Specificity; D012698:Serologic Tests / Q000295:instrumentation / Q000379:methods / Q000592:standards
chemical_list: D006514:Hepatitis B Surface Antigens; D011933:Reagent Kits, Diagnostic