title: Establishment of lymphatic filarial specific IgG4 indirect ELISA detection method.
abstract: OBJECTIVE
  To establish the lymphatic filarial specific IgG4 indirect ELISA detection method and develop the kits.
  
  
  METHODS
  ELISA and the developed specific IgG4 reagent was used to explore the best way for detecting filarial specific IgG4. Combined with the production process of commercialized enzyme immunoassay kit to develop economical lymphatic filarial specific IgG4 test kit, and to explore the value of the kit in the laboratory.
  
  
  RESULTS
  We determined the most optimal detective antigen was Malay adult filarial antigen and the optimal concentration of coating antigen was 1.0 μg/ml. The appropriate serum dilution was 1:20 to 40 and the work titers of specific IgG4 agents was 1:800. We determined the optimal reaction time for substrates and developed a reproducible and stable detection kit with sensitive and specificity, which was easy to operate.
  
  
  CONCLUSIONS
  We successfully established the lymphatic filarial specific IgG4 indirect ELISA detection method and developed the kits with good reproducibility and stable result, which should be widely applied.
authors.affiliation: Shandong Academy of Medical Sciences, Shandong Institute of Parasitic Disease, WHO Collaborating Centre for Lymphatic Filariasis Jining 272033, China.
authors.forename: Jin
authors.initials: J
authors.lastname: Li
authors.affiliation: Shandong Academy of Medical Sciences, Shandong Institute of Parasitic Disease, WHO Collaborating Centre for Lymphatic Filariasis Jining 272033, China.
authors.forename: Qing-Kuan
authors.initials: QK
authors.lastname: Wei
authors.affiliation: ShenZhen Combined Biotech Co, Ltd Shenzhen 518054, China.
authors.forename: Shao-Liang
authors.initials: SL
authors.lastname: Hu
authors.affiliation: Shandong Academy of Medical Sciences, Shandong Institute of Parasitic Disease, WHO Collaborating Centre for Lymphatic Filariasis Jining 272033, China.
authors.forename: Ting
authors.initials: T
authors.lastname: Xiao
authors.affiliation: Shandong Academy of Medical Sciences, Shandong Institute of Parasitic Disease, WHO Collaborating Centre for Lymphatic Filariasis Jining 272033, China.
authors.forename: Chao
authors.initials: C
authors.lastname: Xu
authors.affiliation: Shandong Academy of Medical Sciences, Shandong Institute of Parasitic Disease, WHO Collaborating Centre for Lymphatic Filariasis Jining 272033, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Liu
authors.affiliation: Shandong Academy of Medical Sciences, Shandong Institute of Parasitic Disease, WHO Collaborating Centre for Lymphatic Filariasis Jining 272033, China.
authors.forename: Bing-Cheng
authors.initials: BC
authors.lastname: Huang
authors.affiliation: Shandong Academy of Medical Sciences, Shandong Institute of Parasitic Disease, WHO Collaborating Centre for Lymphatic Filariasis Jining 272033, China.
authors.forename: Feng-Ju
authors.initials: FJ
authors.lastname: Jia
keywords: ELISA; Lymphatic filariasis; kit; specific IgG4